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Sample records for basin sp brazil

  1. Penicillium excelsum sp. nov from the Brazil Nut Tree Ecosystem in the Amazon Basin'.

    Science.gov (United States)

    Taniwaki, Marta Hiromi; Pitt, John I; Iamanaka, Beatriz T; Massi, Fernanda P; Fungaro, Maria Helena P; Frisvad, Jens C

    2015-01-01

    A new Penicillium species, P. excelsum, is described here using morphological characters, extrolite and partial sequence data from the ITS, β-tubulin and calmodulin genes. It was isolated repeatedly using samples of nut shells and flowers from the brazil nut tree, Bertolletia excelsa, as well as bees and ants from the tree ecosystem in the Amazon rainforest. The species produces andrastin A, curvulic acid, penicillic acid and xanthoepocin, and has unique partial β-tubulin and calmodulin gene sequences. The holotype of P. excelsum is CCT 7772, while ITAL 7572 and IBT 31516 are cultures derived from the holotype.

  2. Soil gamma ray spectrometry of the Buquira river basin, SP, Brazil; Gamametria de solos da bacia do rio Buquira, SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Rivera, Alice

    2002-12-01

    Natural radioactivity found in rocks and its evaluation been frequently used for studies of environmental geochemistry, particularly those of detection and control of pollutants and the consequent changes in environment after antropic interferences. In this work natural radioactivity in forty nine soil samples in the basin of Buquira river, at the Northeast region of Sao Paulo State, has been analysed and measured with a Ge-HP gamma ray spectrometer. A table with the most relevant results found in rocks is shown and discussed. (author)

  3. Coricladus quiteriensis gen. et sp. nov., a new conifer in Southern-Brazil Gondwana (Lower Permian, Paraná Basin

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    Jasper André

    2005-01-01

    Full Text Available A new taxon of conifers (Coricladus quiteriensis is described based on megafloristic remains from the roofshale level at the Quitéria Outcrop (Rio Bonito Formation - Lower Permian - Southern Paraná Basin - Rio Grande do Sul - Brazil. This megafloristic community is included in the Botrychiopsis Zone - Botrychiopsis valida Sub-Zone (Kungurian/Roadian. The assemblage, preserved as impressions, do not present remains of epidermic characters, and is composed mainly of isolated vegetative branches with spirally disposed acicular leaves, presenting a conspicuous central vein and also isolated fertile branches with sparse and irregular leaves and terminal cones. Leafless principal branches, organically connected with sterile and fertile branches, are rare. Reproductive feminine scales, disposed in a plane, are organized in lax terminal cones on branches, composed by 4 (four distal ovuliferous scales, and 8 (eight elliptical-elongated anatropous seeds. Paleoecological data pointed out to a mesophylous to higrophylous habitat in swampy environments.

  4. Description of Muscotabanus gen. nov. and Muscotabanus rafaeli sp. nov. (Diptera: Tabanidae: Diachlorini from Amazon Basin, Brazil

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    Augusto Loureiro Henriques

    2013-05-01

    Full Text Available A new genus of Tabanidae mimetic of flies is described: Muscotabanus new genus, Muscotabanus rafaeli new species, based on 12 females collected in the state of Amazonas, Brazil. It is presented a discussion for separating the new genus from Diachlorini species which resemblance with sarcophagids flies. It is characterised by striped thorax, banded abdomen, long slender palpus subequal antenna length, labella predominantly membranous, except for a narrow sclerotised plate, basicosta bare, wing hyaline and stigma brown.

  5. Study of human occupation impacts in the Batedor river basin in the Mantiqueira Mountain in the municipal district of Cruzeiro, SP, Brazil

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    Marcelo dos Santos Targa

    2008-04-01

    Full Text Available The study of hydrographic basins as territorial units integrating the management of hydric resources is essential to guarantee sustainable use of natural resources in these basins. The establishment of the Paraíba do Sul hydrographic basins committee, in 1994, determined the need for management planning and action integration in the Paraíba do Sul basin which incorporates a variety of industries and intense land use. The Batedor river, in the municipality of Cruzeiro, SP, flows into the Passa Vinte which is an affluent of Paraíba do Sul river. Its mouth is located at 22°31’0.63”S and 45°01’2.07”W. Its farthest water contributing source lies about 8.5 km, near the Itaguaré peak 2,308 m high, in the Mantiqueira Mountain on the border of São Paulo and Minas Gerais States. To characterize land use in the Batedor hydrographic basin, Landsat imagery and topographic charts were analyzed based on remote sensing and geoprocessing techniques. This paper describes the study of impacts related to land and water resources use in the Batedor river basin and the generation of educational environmental material. Results have shown that this basin has good water supply, has no flooding risk and has several springs running down the Mantiqueira Moutain slopes that form young creeks with few meanders. Irregular human occupation for housing and subsistence agriculture, mainly banana plantations can be seen in deep slopes and riparian areas, as well as degraded pastures that indicate inappropriate land use and no conformance to pertinent legislation. The decrease in forest vegetation cover can cause severe erosion with significant soil loss and sediment deposition in the river, thus reducing water quality and quantity during the dry season. This basin is currently responsible for 70% of the Cruzeiro, SP water supply.

  6. Study of human occupation impacts in the Batedor river basin in the Mantiqueira mountain in the municipality of Cruzeiro, SP, Brazil

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    Marcelo dos Santos Targa

    2008-04-01

    Full Text Available The study of hydrographic basins as territorial units integrating the management of hydric resources is essential to guarantee sustainable use of natural resources in these basins. The establishment of the Paraíba do Sul hydrographic basins committee, in 1994, determined the need for management planning information and integration actions in the Paraíba do Sul basin which incorporates a variety of industries and intense land use. The Batedor river, in the municipality of Cruzeiro, SP, flows into the Passa Vinte which is an affluent of Paraíba do Sul river. Its mouth is located at 22°31’0.63”S and 45°01’2.07”W. Its farthest water contributing source lies about 8.5 km, near the Itaguaré peak 2,308 m high, in the Mantiqueira mountain on the border of São Paulo and Minas Gerais States. To characterize land use in the Batedor hydrographic basin, Landsat imagery and topographic charts were analyzed based on remote sensing and geoprocessing techniques. This paper describes the study of impacts related to land and water resources use in the Batedor river basin and the generation of support material for environmental education. Results has shown that this basin has good water supply, has no flooding risk and has several springs running down the Mantiqueira Moutain slopes that form young creeks with few meanders. Irregular human occupation for housing and subsistence agriculture, mainly banana plantations can be seen in deep slopes and riparian areas, as well as degraded pastures that indicate inappropriate land use and no conformance to pertinent legislation. The decrease in forest vegetation cover can cause severe erosion with significant soil loss and sediment deposition in the river, thus reducing water quality and regulated quantity. This basin is currently responsible for 70% of the water supply for the city of Cruzeiro, SP.

  7. Morphometric analysis of sub-basins Fojo and Perdizes in the city of Campos do Jordão, SP, Brazil

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    Nelson Wellausen Dias

    2012-12-01

    Full Text Available The State of São Paulo Water Resources Policy established, in 1991, the Integrated Water Resources Management System (SIGRHI and defined the basic principles for water management, adopting the watershed as the basic unit for studies, integrated planning for sustainable development. This study characterized the morphology of sub-basins Fojo and Perdizes in the city of Campos do Jordão, SP. Morphometric analysis involved the characterization of geometric parameters, topography and drainage network, and the analysis of land use and land cover of the sub-basins. The morphometric characterization revealed that Perdizes sub-basin has an area of 12.70 km², a perimeter of 19.85 km, and a main channel length of 6.86 km, while Fojo sub-basin has a drainage area of 13.97 km ², a perimeter of 19.74 km, and a main channel length of 6.94 km. These results indicate similarities between the two sub-basins. The compactness coefficient (Kc for Perdizes was 1.56 and for Fojo 1.41. These values associated with the respective form factors, F = 0.27 and F = 0.29, indicate that these sub-basins, under a normal precipitation regime are not susceptible to flooding. The results of these indices are consisted with the circularity index (CI found: CI = 0.41 for Perdizes and CI = 0.45 for Fojo, respectively. As CI values found are far from one, they indicate that these sub-basins tend to have a more elongated shape and, therefore, lower flow concentration tendency. The results obtained for the maintenance coefficient indicate that in order to maintain the flow of each channel meter, Perdizes sub-basin needs 286.5 m² and Fojo sub-basin needs 243.9 m². Land cover and land use analysis revealed that among the four existing vegetation cover types, Forest is dominant in both sub-basins with 649 ha (51.1% in Perdizes, and 608.8 ha (43.6% in Fojo; Reforestation cover ranks second with similar areas in both sub-basins, Perdizes with 218 ha (17.2% and Fojo with approximately

  8. Geochemical behavior of radionuclides and heavy metals in soils from Corumbatai River basin (SP), Brazil; Comportamento geoquimico de radionuclideos e metais pesados em solos da bacia do Rio Corumbatai (SP)

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    Conceicao, Fabiano Tomazini da

    2004-07-01

    The purpose of this research was to study the geochemical behavior of radionuclides and heavy metals in soils of agricultural use at Corumbatai River basin (SP). The natural concentration and variability in sedimentary rocks at Corumbatai river basin follow the trend Ca > Mg > K > Na, with the concentration of heavy metals and radionuclides. The distribution of exposure rate in soils shows the occurrence of higher values towards south of the Corumbatai river basin, region where are applied phosphate fertilizers, amendments and 'vinhaca' in sugar cane crops. Heavy metals and radionuclides incorporated in phosphate fertilizers and amendments are annually added during the fertilization process in the sugar cane crops, but if they are utilized in accordance with the recommended rate, they do not rise the concentration levels in soils up to hazards levels. Thus, they are lower transferred from soils to sugar cane at Corumbatai river basin, not offering hazard to the ecosystem and animal or human health. (author)

  9. Biosorption of uranium by Azolla, SP, Brazil

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    Vieira, Ludmila C.; Alves, Eliakim G.; Marumo, Julio T., E-mail: lcvieira@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Ferreira, Rafael V. de P., E-mail: rafael@itatijuca.com [Itatijuca Biotech, Sao Paulo, SP (Brazil); Canevesi, Rafael L.S.; Silva, Edson A., E-mail: edson.silva2@unioeste.br [Universidade Estadual do Oeste Parana (UNIOESTE), Toledo, PR (Brazil)

    2015-07-01

    Radioactive liquid waste needs special attention and requires suitable treatment before deposition. Among the potential technologies under development for the treatment of liquid radioactive wastes the biosorption has been highlighted by being an efficient and low cost technique. Biosorption process involves the exchange of ions contained in the biomass matrix by others present in solution. There are many biomasses that could be applied in treatment of radioactive wastes, for example, agricultural residues and macrophyte. The aim of this study is evaluate the ability of the Azolla sp., a floating aquatic plant, to absorb uranium in solution. Azolla sp. is a macrophyte that has been used to treat effluents containing heavy metals. The biosorption capacity of uranium by Azolla sp. was experimentally determined and modeled by isotherms. Experiments were performed to determine metal uptake, and then the solutions were analyzed by inductively coupled plasma optical emission spectrometry (ICP-OES). The isotherms applied to model the data was Langmuir, Freundlich, Sips Toth, Redlich Peternson, Two-Site-Langmuir, Radke Prausnitz to develop a technique for the treatment of radioactive liquid waste generated at the Nuclear and Energy Research Institute (IPEN-CNEN/SP), Brazil. (author)

  10. Population biology of Trichomycterus sp. (Siluriformes, Trichomycteridae in Passa Cinco stream, Corumbataí River sub-basin, São Paulo State, southeastern Brazil

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    GR. Rondineli

    Full Text Available The aim of this work was to characterise the population of Trichomycterus sp. in Passa Cinco stream, regarding length structure, sex ratio, diet and reproductive aspects, in accordance with drought and rainy season periods and longitudinal gradient, as well as to analyse its corporal condition in a temporal dimension. Six samplings were accomplished with the use of electric fishing equipment in three different sites in Passa Cinco stream, contemplating sites of order two, three and four, during the months of May, July, September and November of 2005; and January and March of 2006. Three hundred and forty one individuals were captured, composed of 203 males, 99 females and 39 immatures. The smallest captured individual, an immature, presented 28 mm of standard length and the largest, a male, 85 mm. There was not significant variation in repletion degree and accumulated fat in the visceral cavity of the individuals analysed during the considered periods. Eleven different food items were found in the stomach contents. Considering the whole sampling period, immature Diptera was a preferential item and other items were found as occasionally ingested. Spearman and Friedman tests did not find significant differences in the diet of Trichomycterus sp. in the periods and sampling sites, respectively. The average of absolute fecundity was of 73 oocytes, and the parceled type of spawning was performed. Both males and females of Trichomycterus sp. presented significant differences in their corporal conditions in the considered periods, and in the rainy season, these fishes were in better condition.

  11. Metal and trace element sediment assessment from Guarapiranga reservoir, Alto Tiete Basin, Sao Paulo, SP, Brazil; Avaliacao da concentracao de metais e elementos traco em amostras de sedimento do reservatorio Guarapiranga, Sao Paulo, SP, Brasil

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    Guimaraes, Guilherme Moura

    2011-07-01

    The Guarapiranga Reservoir, located in Sao Paulo metropolitan region, Brazil, is responsible for supplying about 20% of the entire population's water needs of this region or approximately 3.7 million people. However, this system has shown significant degradation in water quality, due to untreated domestic sewage and industrial effluents. In this study sediment samples were collected at five points along the reservoir and total concentration of some major (Fe, K and Na), trace (As, Ba, Br, Co, Cr, Cs, Hf, Hg, Rb, Sb, Sc, Ta, Tb, Th, U, V and Zn) and rare earth (Ce, Eu, La, Lu, Nd, Sm, Tb and Yb) elements were determined by instrumental neutron activation analysis (INAA). By inductively coupled plasma optical emission spectrometry (ICP OES) the concentrations of Al, Ba, Be, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, Pb, Ti, V e Zn were determined after digestion procedure following US EPA 3051 methodology. The concentrations of metals Cd and Pb were determined by graphite furnace atomic absorption spectrometry (GFAAS) and total Hg by cold vapor atomic absorption spectrometry (CVAAS). Methodology validation according to precision and accuracy was performed by reference materials analyses for the three different analytical techniques used. Multielemental results obtained by INAA were compared to NASC (North American Shale Composite), Upper Continental Crust (UCC) and soil from Guarapiranga park values. The Enrichment Factor (EF) and Geo accumulation Index (Igeo) were also evaluated for these data. Metal concentration results by ICP OES and AAS in the samples were compared to the TEL and PEL oriented values established by the Canadian Council of Ministers of the Environment and also adopted by CETESB (Environmental Protection Agency of the Sao Paulo State). The results were also compared to regional reference values (VRR) of limnic sediments from the Alto Tiete Basin. From these data an assessment of metal and trace element accumulated in the sediments from the

  12. [Toxocara sp. eggs and Ancylostoma sp. larva in public parks, Brazil].

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    Guimarães, Antônio Marcos; Alves, Endrigo Gabellini Leonel; de Rezende, Glycia Ferreira; Rodrigues, Marcelo Costa

    2005-04-01

    Visceral and cutaneous larva migrans are parasitic zoonoses caused by the infection of larval nematodes Toxocara sp. and Ancylostoma sp. respectively. The objective of this study was to investigate the contamination by Toxocara sp. eggs and Ancylostoma sp. eggs and larva of soil samples collected from public parks and children's playground areas in state of Minas Gerais, Brazil, using both Baermann's method and centrifugal flotation technique. Toxocara sp. and Ancylostoma sp. eggs were observed in soil samples collected from public squares in 17.4% (4/23) and 69.6 (16/23) respectively. In schools and child day care settings the contamination by Ancylostoma sp. larva in sand samples was 11.1% (2/18). Public parks are settings of more potential risk of Toxocara sp. eggs and Ancylostoma sp. infection. Stool parasitology testing of 174 stool samples showed 58% and 23% of Ancylostoma sp and Toxocara sp eggs infection respectively.

  13. First description of Leishmania (Viannia) infection in Evandromyia saulensis, Pressatia sp. and Trichophoromyia auraensis (Psychodidae: Phlebotominae) in a transmission area of cutaneous leishmaniasis in Acre state, Amazon Basin, Brazil

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    de Araujo-Pereira, Thais; de Pita-Pereira, Daniela; Boité, Mariana Côrtes; Melo, Myllena; da Costa-Rego, Taiana Amancio; Fuzari, Andressa Alencastre; Brazil, Reginaldo Peçanha; Britto, Constança

    2017-01-01

    Studies on the sandfly fauna to evaluate natural infection indexes are still limited in the Brazilian Amazon, a region with an increasing incidence of cutaneous leishmaniasis. Here, by using a multiplex polymerase chain reaction directed to Leishmania kDNA and hybridisation, we were able to identify L. (Viannia) subgenus in 12 out of 173 sandflies captured in the municipality of Rio Branco, Acre state, revealing a positivity of 6.94%. By sequencing the Leishmania 234 bp-hsp70 amplified products from positive samples, infection by L. (V.) braziliensis was confirmed in five sandflies: one Evandromyia saulensis, three Trichophoromyia auraensis and one Pressatia sp. The finding of L. (Viannia) DNA in two Ev. saulensis corresponds to the first record of possible infection associated with this sandfly. Moreover, our study reveals for the first time in Brazil, Th. auraensis and Pressatia sp. infected by L. (Viannia) parasites. PMID:28076470

  14. Aspergillus bertholletius sp. nov. from Brazil Nuts

    DEFF Research Database (Denmark)

    Taniwaki, Marta H.; Pitt, John I.; Iamanaka, Beatriz T.

    2012-01-01

    During a study on the mycobiota of brazil nuts (Bertholletia excelsa) in Brazil, a new Aspergillus species, A. bertholletius, was found, and is described here. A polyphasic approach was applied using morphological characters, extrolite data as well as partial beta-tubulin, calmodulin and ITS...... acid and ustilaginoidin C. Phylogenetic analysis using partial beta-tubulin and camodulin gene sequences showed that A. bertholletius represents a new phylogenetic clade in Aspergillus section Flavi. The type strain of A. bertholletius is CCT 7615 (=ITAL 270/06 = IBT 29228)....

  15. Papiliotrema leoncinii sp. nov. and Papiliotrema miconiae sp. nov., two tremellaceous yeast species from Brazil.

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    Machado Pagani, Danielle; Brandão, Luciana R; Santos, Ana Raquel O; Felix, Ciro R; Pais Ramos, Jesus; Broetto, Leonardo; Scorzetti, Gloria; Fell, Jack W; Augusto Rosa, Carlos; Valente, Patricia; Fontes Landell, Melissa

    2016-04-01

    Two yeast species, Papiliotrema leoncinii sp. nov. and Papiliotrema miconiae sp. nov., in the family Rhynchogastremataceae of the Tremellales are proposed. The two species are related to six species of the genus Papiliotrema: Papiliotrema aureus, P. flavescens, P. terrestris, P. baii, P. ruineniae and P. wisconsinensis. The novel species are proposed on the basis of the sequence-based phylogenetic species concept with analysis of the D1/D2 region of the large subunit (LSU) rRNA gene and the internal transcribed spacer (ITS) region. A total of 16 strains of Papiliotrema leoncinii sp. nov. were obtained from freshwater and bromeliad leaves collected in Brazil. Papiliotrema leoncinii sp. nov. differs by 11, 12, 16, 14, 11 and 13 substitutions in the D1/D2 domain from the related species P. aureus, P. flavescens, P. terrestris, P. baii, P. ruineniae and P. wisconsinensis, respectively. Differences of 11 substitutions and 21 or more substitutions in ITS regions were found when the sequences of Papiliotrema leoncinii sp. nov. were compared with P. wisconsinensis and its closest relatives. The type strain of Papiliotrema leoncinii sp. nov. is UFMG-CM-Y374T (=CBS 13918T). Papiliotrema miconiae sp. nov. is represented by two strains isolated from a flower of Miconia sp. and a water sample in Brazil. Papiliotrema miconiae sp. nov. differs from the related species P. aureus and P. ruineniae by eight substitutions, from P. flavescens and P. terrestris by 11 substitutions, from P. baii by 10 substitutions and from P. wisconsinensis by 6 substitutions in the D1/D2 domain, and by 7 substitutions from P. wisconsinensis and more than 19 substitutions in the ITS region from its closest relatives. The type strain of Papiliotrema miconiae sp. nov. is CBS 8358T (ML 3666T=DBVPG-4492T). The MycoBank numbers for Papiliotrema leoncinii sp. nov. and Papiliotrema miconiae sp. nov. are MB 813594 and MB 814882, respectively.

  16. Karyomegaly in Baryancistrus sp. (Loricaridae) from Amazonian Brazil.

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    Paperna, I; Di Cave, D

    2001-06-20

    Vesicular karyomegaly of the liver hepatocytes is described from Baryancistrus sp. (Loricaridae), in 3 out of 7 fish, collected from Rio Xingu in central Amazonian (neutral water) Brazil and kept about 2 wk in a holding facility fed with acid water (pH 5.0 to 5.5). Altered cells also occurred in the gill epithelium. The vesicles in the liver were shown to contain a periodic acid-Schiff (PAS)-positive substance or residue.

  17. Compensatory forestation for soil water retention in watersheds of Campos do Jordão municipality, SP, Brazil

    OpenAIRE

    Getulio Teixeira Batista; Marcelo dos Santos Targa; Agenor Micaeli dos Santos; Nelson Wellausen Dias

    2011-01-01

    Compensatory forestation is an important technique to estimate the necessary forest cover for compensating the water loss due to surface runoff within a watershed and, therefore, guiding forest recovery interventions. The objective of this study was to quantify the forest area needed to compensate water loss caused by surface runoff in Fojo Creek and Perdizes Creek basin areas in the municipality of Campos do Jordão, SP, Brazil. Estimates were based on the Compensatory Forestation Methodology...

  18. Tabanidae (Diptera of Maranhão state, Brazil. V. Description of Protosilvius gurupi sp. n. (Pangoniinae, Pangoniini and key to Protosilvius species

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    Jose Rafael

    2012-10-01

    Full Text Available Protosilvius gurupi sp. n. (Tabanidae, Pangoniinae is described and illustrated based on seven female and 53 male specimens collected in the Amazonian region at Reserva Biológica Gurupi, Centro Novo do Maranhão municipality, northwest Maranhão, Brazil. This is the first record of Protosilvius in northern Brazil and in the Amazon Basin. An illustrated key to all Protosilvius species is also presented.

  19. Cassiopidae gastropods, influence of Tethys Sea of the Romualdo Formation (Aptian-Albian), Araripe Basin, Brazil

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    Pereira, Priscilla Albuquerque; Cassab, Rita de Cassia Tardin; Barreto, Alcina Magnólia Franca

    2016-10-01

    The Cassiopidae family belongs to a group of gastropods of the Tethyan Realm, whose origin and dispersion are related a transgression of the Tethys Sea during the Early Cretaceous. The Romualdo Formation in the Araripe Basin, located in Northeast Brazil, presents fossil assemblages with echinoids, bivalves and cassiopid gastropods, indicating a marine sedimentation at the top of the formation. This research reveals three new species of this fauna: Gymnentome (Craginia) beurleni sp. nov., 'Pseudomesalia' ('Pseudomesalia') mennessieri sp. nov and 'Pseudomesalia' ('Pseudomesalia') santanensis sp. nov. We also review two other species: Craginia araripensisBeurlen, 1964 and Gymnentome romualdoiBeurlen, 1964, which we reclassify taxonomically as Paraglauconia (Diglauconia) araripensis and Gymnentome (Gymnentome) romualdoi, respectively; Paraglauconia (Diglauconia) lyrica Maury, 1936 and Gymnentome (Gymnentome) carregozica Maury, 1936 were the first recorded species in the Araripe Basin. The occurrence of these cassiopid gastropod fauna in other basins, such as Sergipe, Potiguar and Parnaíba, indicate the influence of waters coming from the north through the Tethys Sea in the Aptian-Albian and in the marginal continental basins of the Brazilian Northeast.

  20. Relações solo, superfície geomórfica e substrato geológico na microbacia do ribeirão Marins (Piracicaba - SP Soil, geological substrate and geomorphic surface relationships for the Marins river basin (Piracicaba, SP, Brazil

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    Edson Roberto Teramoto

    2001-06-01

    60-80cm é influenciada principalmente pela natureza química e física do substrato geológico, enquanto que os atributos morfológicos são determinados principalmente pelo relevo. Estas relações se repetem na paisagem da microbacia com características de solo, relevo e litologia semelhantes, permitindo sua extrapolação para outras áreas, contribuindo para futuros levantamentos detalhados de solos que possam vir a ser realizados na região.The relationships between soil, geology and geomorphic surface were studied in the Marins basin of Piracicaba, S.P., Brazil. Soils, parent material, geology and geomorphic surfaces were mapped. Two transects were studied to verify the lateral variation of the soils. Geology derives from Neo-Cenozoic superficial deposits of a loamy sand texture, sandstone belonging to the Piramboia Formation of the São Bento group, with siltstones and shales belonging to the Corumbatai Formation of the Passa Dois group, and colluvial and alluvial sediments. Five geomorphic surfaces were identified. The relationships between soil, parent material, geology and geomorphic surfaces were performed cross-referencing the different maps. These relations were analyzed by comparision to an "uniformity index", specialy developed to verify the inter-relation uniformity. Ten soil units were identified (Oxisol, Ultisol and Inceptisol orders. The Oxisol is related to the neocenozoic cover and surface I, were the relief is almost flat. The Ultisol, with a predominance of a sandy loam texture, is related to the Pirambóia formation sandstone and to surfaces II and III, with gentle slopes. The Incepstisol, with a clayey texture, are associated to the Corumbataí formation siltstone and silex, with IV and V surfaces (ondulating relief. The Incepitsols of varied textures are related to alluvium and colluvium deposits.The relation that exists between the soils and the geomorphic surfaces is represented by the tendency that, the older and more stable the surface

  1. Evolution and palaeoenvironment of the Bauru Basin (Upper Cretaceous, Brazil)

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    Fernandes, Luiz Alberto; Magalhães Ribeiro, Claudia Maria

    2015-08-01

    The Bauru Basin was one of the great Cretaceous desert basins of the world, evolved in arid zone called Southern Hot Arid Belt. Its paleobiological record consists mainly of dinosaurs, crocodiles and turtles. The Bauru Basin is an extensive region of the South American continent that includes parts of the southeast and south of Brazil, covering an area of 370,000 km2. It is an interior continental basin that developed as a result of subsidence of the central-southern part of the South-American Platform during the Late Cretaceous (Coniacian-Maastrichtian). This sag basin is filled by a sandy siliciclastic sequence with a preserved maximum thickness of 480 m, deposited in semiarid to desert conditions. Its basement consists of volcanic rocks (mainly basalts) of the Lower Cretaceous (Hauterivian) Serra Geral basalt flows, of the Paraná-Etendeka Continental Flood Basalt Province. The sag basin was filled by an essentially siliciclastic psammitic sequence. In lithostratigraphic terms the sequence consists of the Caiuá and Bauru groups. The northern and northeastern edges of the basin provide a record of more proximal original deposits, such as associations of conglomeratic sand facies from alluvial fans, lakes, and intertwined distributary river systems. The progressive basin filling led to the burial of the basaltic substrate by extensive blanket sand sheets, associated with deposits of small dunes and small shallow lakes that retained mud (such as loess). Also in this intermediate context between the edges (more humid) and the interior (dry), wide sand sheet areas crossed by unconfined desert rivers (wadis) occurred. In the central axis of the elliptical basin a regional drainage system formed, flowing from northeast to southwest between the edges of the basin and the hot and dry inner periphery of the Caiuá desert (southwest). Life in the Bauru Basin flourished most in the areas with the greatest water availability, in which dinosaurs, crocodiles, turtles, fish

  2. Contribution to the stratigraphy of the onshore Paraiba Basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Rossetti, Dilce F.; Valeriano, Marcio M., E-mail: rossetti@dsr.inpe.br [Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Divisao de Sensoriamento Remoto; Goes, Ana M.; Brito-Neves, Benjamim B. [Universidade de Sao Paulo (USP), Sao Paulo, SP (Brazil). Inst. de Geociencias; Bezerra, Francisco H.R.; Ochoa, Felipe L. [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Centro de Ciencias Exatas e da Terra. Departamento de Geologia

    2012-06-15

    Several publications have contributed to improve the stratigraphy of the Paraiba Basin in northeastern Brazil. However, the characterization and distribution of sedimentary units in onshore areas of this basin are still incomplete, despite their significance for reconstructing the tectono- sedimentary evolution of the South American passive margin. This work provides new information to differentiate among lithologically similar strata, otherwise entirely unrelated in time. This approach included morphological, sedimentological and stratigraphic descriptions based on surface and sub-surface data integrated with remote sensing, optically stimulated luminescence dating, U+Th/He dating of weathered goethite, and heavy mineral analysis. Based on this study, it was possible to show that Cretaceous units are constrained to the eastern part of the onshore Paraiba Basin. Except for a few outcrops of carbonatic-rocks nearby the modern coastline, deposits of this age are not exposed to the surface in the study area. Instead, the sedimentary cover throughout the basin is constituted by mineralogically and chronologically distinctive deposits, inserted in the Barreiras Formation and mostly in the Post-Barreiras Sediments, of early/middle Miocene and Late Pleistocene-Holocene ages, respectively. The data presented in this work support tectonic deformation as a factor of great relevance to the distribution of the sedimentary units of the Paraiba Basin. (author)

  3. Potamotrygon limai, sp. nov., a new species of freshwater stingray from the upper Madeira River system, Amazon basin (Chondrichthyes: Potamotrygonidae).

    Science.gov (United States)

    Fontenelle, João Pedro; Da Silva, João Paulo C B; De Carvalho, Marcelo R

    2014-02-18

    Potamotrygon limai, sp. nov., is described from the Jamari River, upper Madeira River system (Amazon basin), state of Rondônia, Brazil. This new species differs from congeners by presenting unique polygonal or concentric patterns formed by small whitish spots better defined over the posterior disc and tail-base regions. Potamotrygon limai, sp. nov., can be further distinguished from congeners in the same basin by other characters in combination, such as two to three rows of midtail spines converging to a single irregular row at level of caudal sting origin, proportions of head, tail and disc, patterns of dermal denticles on rostral, cranial and tail regions, among other features discussed herein. Potamotrygon limai, sp. nov., is most similar to, and occurs sympatrically with, P. scobina, and is distinguished from it by lacking ocellated spots on disc, by its characteristic polygonal pattern on posterior disc, a comparatively much shorter and broader tail, greater intensity of denticles on disc, more midtail spine rows at tail-base, and other features including size at maturity and meristic characters. Potamotrygon limai, sp. nov., is also distinguished from other species of Potamotrygon occurring in the Amazon region, except P. scobina, by presenting three angular cartilages (vs. two or one). This new species was discovered during a detailed taxonomic and morphological revision of the closely related species P. scobina, and highlights the necessity for thorough and all-embracing taxonomic studies, particularly in groups with pronounced endemism and morphological variability.

  4. [Description of a new species of the genus Astyanax Baird & Girard from Araguaia River basin, Brazil].

    Science.gov (United States)

    Garutti, V

    1999-11-01

    Astyanax argyrimarginatus sp. n. is described from the Araguaia River basin, Brazil. The new species may be diagnosed by a humeral dark spot horizontally oval, and an elongated caudal peduncle dark spot, continued to the tip of the mid caudal rays, two dark brown vertical bars on the humeral region, and a single black lateral stripe with silvered border. Forty-two to forty-six scales on lateral line; fourteen to sixteen vertical scales rows. Twenty-seven to thirty-one anal fin rays. Dentary large teeth quincuspid, inner row of pre-maxilar teeth quincuspid or hexacuspid, and one maxillary tooth. Comments on the characters which permit to recognize the new species from others with the same color pattern are made.

  5. Silviculture of eucaliptus plantations in the Paraiba do Sul basin, Brazil, and its potential implication on the basin ecohydrology.

    Science.gov (United States)

    Carriello, Felix; Andres Rodriguez, Daniel; Marques Neves, Otto; Vicens, Raul

    2014-05-01

    Silviculture of eucaliptus plantations is an important driver of the Mata Atlântica biome conversion into another land use in the Paraíba do Sul basin, in the southeastern of Brazil. This region is located in one of the most developed areas in Brazil, between Rio de Janeiro and São Paulo, the most important cities in Brazil, linked by Presidente Dutra highway. Between both cities there are another cities that produce a variety of goods - from meat to planes, cars and mobile phones. This area is, at the same time, one the most important hot spot for the Mata Atlântica biome. Here we have a large Mata Atlântica fragment protected by law and others fragments being conversed to pasture, agriculture, silviculture and urban areas. Paraiba do Sul river drains the region and runs into Rio de Janeiro State. The basin is highly anthropized, with multiple approaches of its waters resources. Its waters also serve Rio de Janeiro metropolitan area. Because land use and land cover changes impact the water yield in a basin, the study of its dynamic its of great importance for water resources management. We study the land use and land cover change in the region between 1986 and 2010, focusing in the development of silviculture of eucaliptus plantations. We used the HAND (Height Above Nearest Drainage) approach that uses the height above the nearest water body, acquired from SRTM Data and transformed into a Terrain Numeric Mode, to classify the landscape into three different ecohydrological environments: floodplain, mountain top and hillslope. This classes were intersected with 1986 and 2010 land use and cover change classification obtained from Landsat imagery. Results show that silviculture has increased in the region from 1986 to 2010. In both years, silviculture areas are mainly located at the hillslope (47%), while floodplain and mountain top share 28 % and 23 % respectively. Available census data from the Brazilian Institute of Geography and Statistics, IBGE, for 1995 and

  6. Chironomidae (Insecta, Diptera from Alto Paranapanema Basin, southeastern Brazil

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    Kathia Sonoda

    2010-11-01

    Full Text Available We investigated the community of Chironomidae from three rivers belonging to the same river basin in Southern Brazil. Our objective was to analyze if the Chironomidae communities from rivers of the same basin were similar and relate this to land-use and water quality variables. Samples of insects were taken using artificial substrate baskets and left 44 days in the field for colonization during the dry season in 2002. Study reaches with the relevant land-use category present for at least 500 m along both river banks above and alongside the study reach were selected and land-use, terrain slope of the river basin and chemical and physical variables of the water were analysed. Faunal data were analyzed by number of individuals, richness of genera and community indices. Statistical analyses were performed in order to investigate the relationship between abiotic variables and the Chironomidae communities. Twenty-two genera were identified; Rheotanytarsus (Thienemann & Bause was the most abundant in all assemblages. Some genera showed preferences in their distribution, and were observed in only one of the rivers. Land-use and slope of the terrain were similar for all rivers, while the water quality variables were different for the Taquari River compared to the two other sites. This may explain the differences in the Chironomidae community observed for this locality

  7. Triatoma jatai sp. nov. in the state of Tocantins, Brazil (Hemiptera: Reduviidae: Triatominae

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    Teresa Cristina Monte Goncalves

    2013-06-01

    Full Text Available Triatoma jatai sp. nov. is the first new species of triatomine to be described in the state of Tocantins, in the northern region of Brazil. It was caught on rock outcrops in the wild environment and, more recently, invading homes. While T. jatai sp. nov. is morphologically similar to Triatoma costalimai, it is distinguished by its general colouring, differences in the blotches on the connexivum, wing size in females and external structures of the male genitalia. The type series has been deposited in the Entomological Collection and Herman Lent Collection, Oswaldo Cruz Institute-Oswaldo Cruz Foundation, Rio de Janeiro, Brazil.

  8. Anti-Leptospira sp. agglutinins in ewes in the Federal District, Brazil.

    Science.gov (United States)

    Seixas, Luiza de S; de Melo, Cristiano Barros; Leite, Rômulo C; Moreira, Elvio C; McManus, Concepta M; de Castro, Márcio B

    2011-01-01

    To define the prevalence of anti-Leptospira sp. agglutinins in ewes in the Federal District, Brazil, serum samples from 157 ewes were tested for antibodies against serovars of Leptospira sp. by the microscopic agglutination test. Antibodies were detected in three flocks in a prevalence of 3% (95% CI = 0.4%-5.7%). Considering that sheep and cattle were raised together, the lack of sanitary control could represent a risk to cattle production, which is the most important activity in the Centre-West region of Brazil.

  9. Triatoma jatai sp. nov. in the state of Tocantins, Brazil (Hemiptera: Reduviidae: Triatominae)

    Science.gov (United States)

    Gonçalves, Teresa Cristina Monte; Teves-Neves, Simone Caldas; dos Santos-Mallet, Jacenir Reis; Carbajal-de-la-Fuente, Ana Laura; Lopes, Catarina Macedo

    2013-01-01

    Triatoma jatai sp. nov. is the first new species of triatomine to be described in the state of Tocantins, in the northern region of Brazil. It was caught on rock outcrops in the wild environment and, more recently, invading homes. While T. jatai sp. nov. is morphologically similar to Triatoma costalimai, it is distinguished by its general colouring, differences in the blotches on the connexivum, wing size in females and external structures of the male genitalia. The type series has been deposited in the Entomological Collection and Herman Lent Collection, Oswaldo Cruz Institute-Oswaldo Cruz Foundation, Rio de Janeiro, Brazil. PMID:23828010

  10. Hydrologic investigations in the Araguaia-Tocantins River basin (Brazil)

    Science.gov (United States)

    Snell, Leonard J.

    1979-01-01

    The Araguaia-Tocantins River basin system of central and northern Brazil drains an area of about 770,000 square kilometers and has the potential for supporting large-scale developments. During a short visit to the headquarters of the Interstate Commission for the Araguaia-Tocantins Valley and to several stream-gaging stations in June 1964, the author reviewed the status of the streamflow and meteorological data-collection programs in relation to the streamflow and meteorological data-collection programs in relation to the pressing needs of development project studies. To provide data for areal and project-site studies and for main-stream sites, an initial network of 33 stream gaging stations was proposed, including the 7 stations then in operation. Suggestions were made in regard to operations, staffing and equipment. Organizational responsibilities for operations were found to be divided uncertainly. The Brazilian Meteorological Service had 15 synoptic stations in operation in and near the basin, some in need of reconditioning. Plans were at hand for the addition of 15 sites to the synoptic network and for limited data collection at 27 other sites. The author proposed collection of precipitation data at about 50 other locations to achieve a more representative areal distribution. Temperature, evaporation, and upper-air data sites were suggested to enhance the prospective hydrometeorological studies. (USGS)

  11. Backwater effects in the Amazon River basin of Brazil

    Science.gov (United States)

    Meade, R.H.; Rayol, J.M.; Da Conceicao, S.C.; Natividade, J.R.G.

    1991-01-01

    The Amazon River mainstem of Brazil is so regulated by differences in the timing of tributary inputs and by seasonal storage of water on floodplains that maximum discharges exceed minimum discharges by a factor of only 3. Large tributaries that drain the southern Amazon River basin reach their peak discharges two months earlier than does the mainstem. The resulting backwater in the lowermost 800 km of two large southern tributaries, the Madeira and Puru??s rivers, causes falling river stages to be as much as 2-3 m higher than rising stages at any given discharge. Large tributaries that drain the northernmost Amazon River basin reach their annual minimum discharges three to four months later than does the mainstem. In the lowermost 300-400 km of the Negro River, the largest northern tributary and the fifth largest river in the world, the lowest stages of the year correspond to those of the Amazon River mainstem rather than to those in the upstream reaches of the Negro River. ?? 1991 Springer-Verlag New York Inc.

  12. Igneous pyrometamorphism in the Potiguar Basin, Northeastern Brazil

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    Larissa dos Santos

    2014-06-01

    Full Text Available In the Potiguar Basin (NE Brazil, cretaceous rocks (sandstones, siltstones, shales, limestones are intruded by Paleogene to Neogene basic bodies. As a result, were formed buchites, pyrometamorphic rocks indicating very low pressures and very high temperatures. Field descriptions permitted distinguishing light buchites (LB and dark buchites (DB, which were investigated throughout petrographic, electron microprobe and X-ray diffraction studies. LBs contain abundant clasts of quartz surrounded by radial tridymite needles, besides phenocrysts of sanidine and clinopyroxene included in a vitreous groundmass. DBs have mainly microcrystals of Fe-cordierite (sekaninaite, mullite, armalcolite, ilmenite and spinel, dispersed within a black cryptocrystalline matrix. Chemically, LBs are richer in SiO2 (~76.7% and K2O (~5.7% and poorer in Al2O3 (~12.8% when compared to DBs (respectively ~51.5, ~0.2 and ~42.7%. Based on phase diagrams published in the literature, the habit of crystals (acicular, elongated sometimes hollow crystals and the significant content of glassy material we consider that the liquid formed by melting at ~1100 – 1150o C of sedimentary material cooled quickly at very high temperatures and pressures below 1 kbar. The results obtained are relevant in petrological terms, and may also have economic implications since a large number of basic bodies intrude rocks with hydrocarbon reservoirs.

  13. Copepods from intertidal interstitial water of Salvador, Brazil. I. Cuipora janaina gen. n., sp. n. & Cyclopina caiala sp. n. (Cyclopoida: Cyclopinidae)

    NARCIS (Netherlands)

    Lotufo, Guilherme Ribeiro; Falavigna da Rocha, Carlos Eduardo

    1991-01-01

    Cuipora janaina gen. n., sp. n., and Cyclopina caiala sp. n. are described from the interstitial water of a sandy beach in Salvador, Bahia (Brazil). Cuipora is distinguished from all other genera of the subfamily Cyclopininae in having the endopodite of legs 1-4 2-segmented and the terminal segment

  14. Wickerhamomyces queroliae sp. nov. and Candida jalapaonensis sp. nov., two yeast species isolated from Cerrado ecosystem in North Brazil.

    Science.gov (United States)

    Rosa, Carlos A; Morais, Paula B; Lachance, Marc-André; Santos, Renata O; Melo, Weilan G P; Viana, Rodney H O; Bragança, Marcos A L; Pimenta, Raphael S

    2009-05-01

    Two novel yeast species, Wickerhamomyces queroliae sp. nov. and Candida jalapaonensis sp. nov., were isolated, respectively, from larvae of Anastrepha mucronata (Diptera: Tephritidae) collected from ripe fruit of Peritassa campestris ('Bacupari', Hippocrateaceae) and from flowers of Centropogon cornutus (Campanulaceae) in the Cerrado ecosystem of the state of Tocantins, Brazil. Analysis of the D1/D2 large-subunit rRNA gene sequences placed W. queroliae in the Wickerhamomyces clade near Wickerhamomyces ciferri and Candida silvicultrix. Candida jalapaonensis belongs to the Wickerhamiella clade and is related to Candida drosophilae. The type strain of Wickerhamomyces queroliae is UFMG-05-T200.1(T) (=CBS 10936(T)=NRRL Y-48478(T)) and the type strain of Candida jalapaonensis is UFMG-03-T210(T) (=CBS 10935(T)=NRRL Y-48477(T)).

  15. Wickerhamiella dulcicola sp. nov. and Wickerhamiella cachassae sp. nov., yeasts isolated from cachaça fermentation in Brazil.

    Science.gov (United States)

    Badotti, Fernanda; Silva, Pollyana A B; Mendonça, Michelle C; Gomes, Fatima C O; Morais, Paula B; Lachance, Marc-André; Rosa, Carlos A

    2013-03-01

    Six strains of two novel yeast species were isolated from sugar-cane juice and fermentation vats of cachaça production in Brazil. The sequences of the D1/D2 domains of the large-subunit rRNA gene showed that these species belong to the Wickerhamiella clade, and their closest described relative in terms of sequence similarity is Candida (iter. nom. Wickerhamiella) drosophilae. The type strain of Wickerhamiella cachassae sp. nov. is UFMG-D5L7(T) ( = CBS 12587(T)  = CBMAI 1469(T)) and the type strain of Wickerhamiella dulcicola sp. nov. is UFMG-TOL15(T) ( = CBS 12588(T)  = CBMAI 1468(T)).

  16. The karyotype of Cathorops sp, a marine catfish from Brazil

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    Vicente Gomes

    1992-01-01

    Full Text Available Cathorops sp has the diploid number of 54 chromosomes. The karyotype comprises lm + sm, 6m, 6sm and 14st pairs. This result is compared with those of other species of Ariidae, mainly Ariopsis felis and Arius dussumieri, found in literature.Foram realizados estudos cromossômicos em 25 espécimens de Cathorops sp pelo método de air-drying. O número modal diplóide encontrado foi de 54 cromossomos sendo 1 par m + sm, 6 pares m, 6 pares sm e 14 pares st. Os resultados são comparados com dados da literatura referentes a cromossomos de outros ariídeos, principalmente de Ariopsis felis e Arius dussumieri.

  17. Perilestes eustaquioi sp. nov. and new distributional records of Perilestidae (Odonata in Brazil

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    Angelo B. M. Machado

    2015-10-01

    Full Text Available ABSTRACT Perilestes eustaquioi sp. nov. (holotype male deposited in ABMM collection from the state of Bahia (municipality of Una, northeastern Brazil, is described and illustrated based on one male specimen. It differs from the other species of the genus mainly by the larger size of the anteclypeus in relations to the postclypeus. Together with P. fragilis Hagen in Selys, 1862 from the state of Sergipe and P. solutus Williamson & Williamson, 1924 from the state of Ceará, these are the first records of Perilestidae from northeastern Brazil.

  18. Ovos de Toxocara sp. e larvas de Ancylostoma sp. em praça pública de Lavras, MG Toxocara sp. eggs and Ancylostoma sp. larva in public parks, Brazil

    Directory of Open Access Journals (Sweden)

    Antônio Marcos Guimarães

    2005-04-01

    Full Text Available Larva migrans visceral e cutânea são zoonoses parasitárias causadas pela infecção da larva de Toxocara sp. e Ancylostoma sp., respectivamente. O objetivo do estudo foi verificar a contaminação por ovos de Toxocara sp. e ovos e larvas de Ancylostoma sp. em amostras de solos coletadas de praças públicas e de áreas de recreação infantil de Lavras, Estado de Minas Gerais, por meio da técnica de centrífugo-flutuação e do método de Baermann. A ocorrência de ovos de Toxocara sp. e, ovos e larvas de Ancylostoma sp. foi observada em 69,6% (16/23 das amostras de solo coletadas de praças públicas. A contaminação somente por ovos de Ancylostoma sp. em amostras de solo coletadas em escolas/creches foi de 22,2% (4/18. A percentagem de amostras de areia coletadas de escolas/creches contaminadas somente com larvas de Ancylostoma sp. foi de 11,1% (2/18. Praças públicas são as áreas com maior risco potencial de infecção por Toxocara sp. e Ancylostoma sp. Exame coproparasitológico realizado em 174 amostras de fezes de cães observou 58% e 23%, respectivamente, com ovos de Ancylostoma sp. e Toxocara sp.Visceral and cutaneous larva migrans are parasitic zoonoses caused by the infection of larval nematodes Toxocara sp. and Ancylostoma sp. respectively. The objective of this study was to investigate the contamination by Toxocara sp. eggs and Ancylostoma sp. eggs and larva of soil samples collected from public parks and children's playground areas in state of Minas Gerais, Brazil, using both Baermann's method and centrifugal flotation technique. Toxocara sp. and Ancylostoma sp. eggs were observed in soil samples collected from public squares in 17.4% (4/23 and 69.6 (16/23 respectively. In schools and child day care settings the contamination by Ancylostoma sp. larva in sand samples was 11.1% (2/18. Public parks are settings of more potential risk of Toxocara sp. eggs and Ancylostoma sp. infection. Stool parasitology testing of 174 stool

  19. Genotypic characterization and phylogenetic analysis of Cryptosporidium sp. from domestic animals in Brazil.

    Science.gov (United States)

    Huber, F; da Silva, S; Bomfim, T C B; Teixeira, K R S; Bello, A R

    2007-11-30

    The purpose of the present study was the genetic characterization, sequencing and phylogenetic analysis of 18S rDNA sequences of Cryptosporidium isolates obtained from different animal hosts in Brazil. Fecal samples containing Cryptosporidium oocysts were obtained from chickens, ducks, quails, guinea pigs, dairy calves, dogs and cats. For amplification of 18S rDNA sequences the Secondary-PCR product of the extracted DNA from fecal suspension of each studied animal was utilized. The primary genetic characterization of Cryptosporidium sp. was performed using RFLP with the enzymes SspI and VspI. DNA samples were sequenced and subjected to phylogenetic analysis. The results showed C. baileyi infecting two ducks and one quail and C. melagridis infecting one chicken. The sequences obtained from Cryptosporidium sp. infecting guinea pigs were not identified within groups of known Cryptosporidium species. The isolates found parasitizing cats and one dog were diagnosed as C. felis and C. canis, respectively. One isolate of calf origin was identified as C. parvum. The phylogenetic analysis showed clear distribution of isolates between two Cryptosporidium sp. groups according to their gastric or intestinal parasitism. A great genetic distance was observed between C. felis and C. canis from Brazil when compared to the reference sequences obtained from GenBank. The results obtained during this study constitute the first report of rDNA sequences from C. baileyi, C. meleagridis, C. felis, C. canis and C. parvum isolated in Brazil.

  20. Description of Rhodnius marabaensis sp. n. (Hemiptera, Reduviidae, Triatominae) from Pará State, Brazil

    Science.gov (United States)

    Souza, Eder dos Santos; Von Atzingen, Noé Carlos Barbosa; Furtado, Maria Betânia; de Oliveira, Jader; Nascimento, Juliana Damieli; Vendrami, Daniel Pagotto; Gardim, Sueli; da Rosa, João Aristeu

    2016-01-01

    Abstract Rhodnius marabaensis sp. n. was collected on 12 May 2014 in the Murumurú Environmental Reserve in the city of Marabá, Pará State, Brazil. This study was based on previous consultation of morphological descriptions of 19 Rhodnius species and compared to the identification key for the genus Rhodnius. The examination included specimens from 18 Rhodnius species held in the Brazilian National and International Triatomine Taxonomy Reference Laboratory in the Oswaldo Cruz Institute in Rio de Janeiro, Brazil. The morphological characteristics of the head, thorax, abdomen, genitalia, and eggs have been determined. Rhodnius prolixus and Rhodnius robustus were examined in more detail because the BLAST analysis of a cyt-b sequence shows they are closely related to the new species, which also occurs in the northern region of Brazil. The most notable morphological features that distinguish Rhodnius marabaensis sp. n. are the keel-shaped apex of the head, the length of the second segment of the antennae, the shapes of the prosternum, mesosternum and metasternum, the set of spots on the abdomen, the male genitalia, the posterior and ventral surfaces of the external female genitalia, and the morphological characteristics of the eggs. Rhodnius jacundaensis Serra, Serra & Von Atzingen (1980) nomen nudum specimens deposited at the Maraba Cultural Center Foundation - MCCF were examined and considered as a synonym of Rhodnius marabaensis sp. n. PMID:27833419

  1. Acanthaspidia namibia n. sp. (Isopoda, Acanthaspidiidae) from the deep Angola Basin

    NARCIS (Netherlands)

    Brandt, Angelika

    2001-01-01

    Acanthaspidia namibia n. sp. was sampled off Namibia on the abyssal plain of the Angola Basin in 5390 m depth from board of the RV ‘Meteor’ in August 2000. Acanthaspidia neonotus (Menzies & George, 1972) is the most similar species, which has also been described from the deep sea, but from the Pacif

  2. Oxygen uptake from aquatic macrophyte decomposition from Piraju Reservoir (Piraju, SP, Brazil

    Directory of Open Access Journals (Sweden)

    I. Bianchini Jr.

    Full Text Available The kinetics of oxygen consumption related to mineralisation of 18 taxa of aquatic macrophytes (Cyperus sp, Azolla caroliniana, Echinodorus macrophyllus, Eichhornia azurea, Eichhornia crassipes, Eleocharis sp1, Eleocharis sp2, Hetereanthera multiflora, Hydrocotyle raniculoides, Ludwigia sp, Myriophyllum aquaticum, Nymphaea elegans, Oxycaryum cubense, Ricciocarpus natans, Rynchospora corymbosa, Salvinia auriculata, Typha domingensis and Utricularia foliosa from the reservoir of Piraju Hydroelectric Power Plant (São Paulo state, Brazil were described. For each species, two incubations were prepared with ca. 300.0 mg of plant (DW and 1.0 L of reservoir water sample. The incubations were maintained in the dark and at 20 ºC. Periodically the dissolved oxygen (DO concentrations were measured; the accumulated DO values were fitted to 1st order kinetic model and the results showed that: i high oxygen consumption was observed for Ludwigia sp (533 mg g-1 DW, while the lowest was registered for Eleocharis sp1 (205 mg g-1 DW mineralisation; ii the higher deoxygenation rate constants were verified in the mineralisation of A. caroliniana (0.052 day-1, H. raniculoides (0.050 day-1 and U. foliosa (0.049 day-1. The oxygen consumption rate constants of Ludwigia sp and Eleocharis sp2 mineralisation (0.027 day-1 were the lowest. The half-time of oxygen consumption varied from 9 to 26 days. In the short term, the detritus of E. macrophyllus, H. raniculoides, Ludwigia sp, N. elegans and U. foliosa were the critical resources to the reservoir oxygen demand; while in the long term, A. caroliniana, H. multiflora and T. domingensis were the resources that can potentially contribute to the benthic oxygen demand of this reservoir.

  3. Oxygen uptake from aquatic macrophyte decomposition from Piraju Reservoir (Piraju, SP, Brazil).

    Science.gov (United States)

    Bianchini Jr, I; Cunha-Santino, M B; Panhota, R S

    2011-02-01

    The kinetics of oxygen consumption related to mineralisation of 18 taxa of aquatic macrophytes (Cyperus sp, Azolla caroliniana, Echinodorus macrophyllus, Eichhornia azurea, Eichhornia crassipes, Eleocharis sp1, Eleocharis sp2, Hetereanthera multiflora, Hydrocotyle raniculoides, Ludwigia sp, Myriophyllum aquaticum, Nymphaea elegans, Oxycaryum cubense, Ricciocarpus natans, Rynchospora corymbosa, Salvinia auriculata, Typha domingensis and Utricularia foliosa) from the reservoir of Piraju Hydroelectric Power Plant (São Paulo state, Brazil) were described. For each species, two incubations were prepared with ca. 300.0 mg of plant (DW) and 1.0 L of reservoir water sample. The incubations were maintained in the dark and at 20 ºC. Periodically the dissolved oxygen (DO) concentrations were measured; the accumulated DO values were fitted to 1st order kinetic model and the results showed that: i) high oxygen consumption was observed for Ludwigia sp (533 mg g-1 DW), while the lowest was registered for Eleocharis sp1 (205 mg g-1 DW) mineralisation; ii) the higher deoxygenation rate constants were verified in the mineralisation of A. caroliniana (0.052 day-1), H. raniculoides (0.050 day-1) and U. foliosa (0.049 day-1). The oxygen consumption rate constants of Ludwigia sp and Eleocharis sp2 mineralisation (0.027 day-1) were the lowest. The half-time of oxygen consumption varied from 9 to 26 days. In the short term, the detritus of E. macrophyllus, H. raniculoides, Ludwigia sp, N. elegans and U. foliosa were the critical resources to the reservoir oxygen demand; while in the long term, A. caroliniana, H. multiflora and T. domingensis were the resources that can potentially contribute to the benthic oxygen demand of this reservoir.

  4. A new species of freshwater sponge, Heteromeyenia barlettai sp. nov. from an aquarium in São Paulo, Brazil (Spongillida: Spongillidae).

    Science.gov (United States)

    Pinheiro, Ulisses; Calheira, Ludimila; Hajdu, Eduardo

    2015-10-29

    A new species of freshwater sponge, Heteromeyenia barlettai sp. nov., is proposed here based on specimens discovered in a private aquarium in São Paulo, Brazil, and most likely inadvertently collected from the Paraná Basin. The present study also presents a redescription of H. insignis on the basis of the specimen reported upon by Volkmer (1963), collected from the Atlântico Sul Hydrographic Basin. Spicule measurements (n=30) were made for comparison with other Heteromeyenia species. This is the first time that H. insignis has its complete set of spicules studied under SEM. After comparison with the redescription of the type of H. baileyi, we also find characteristics that justify the maintenance of H. insignis as a valid species. A key to species of Heteromeyenia is provided.

  5. Crinoids columnals (Echinodermata) of the Ererê Formation (late Eifelian-early Givetian, Amazon Basin), State of Pará, Brazil

    Science.gov (United States)

    Scheffler, S. M.; Fernandes, A. C. S. F.; da Fonseca, V. M. M.

    2014-01-01

    The faunal composition of stalked echinoderms in the Brazilian Devonian is still largely unknown despite the great abundance of crinoids in the shallow epicontinental seas of the Paleozoic. The first Devonian crinoids of Brazil, recorded in the literature in 1875 and 1903, were from the sedimentary rocks of the Ererê Formation in the Amazon Basin. Since then, the echinoderms of this formation have not been studied. This study, based on isolated pluricolumnals and columnals, described and identified Botryocrinus meloi n. sp., the first record for this genus in Brazil. In addition to this species, two other morphological patterns were identified: Tjeecrinus sp. and Morphotype AM/Er-01. The form of occurrence of the crinoid material and the paleoautoecology of B. meloi allow preliminary characterization of the habitat as a moderately deep water with weak to moderate currents and soft substrate. The similarity between B. meloi and Botryocrinus montguyonensis and of Tjeecrinus? sp. and T. crassijugatus, from the Devonian of the Armorican and Rhenan Massif, represents new evidence for the existence of contact between the faunas of the Amazon Basin with those of northern Gondwana and Armorica during the Middle Devonian.

  6. Fishes from the Itapecuru River basin, State of Maranhão, northeast Brazil

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    MC Barros

    Full Text Available The Itapecuru is a relatively large river in the northeastern Brazilian state of Maranhão. During several expeditions to this basin, we collected 69 fish species belonging to 65 genera, 29 families and 10 orders. Characiformes and Siluriformes were the orders with the largest number of species and Characidae, Loricariidae, Cichlidae, Auchenipteridae and Pimelodidae were the richest families. About 30% of the fish fauna of the Itapecuru basin is endemic or restricted to northeastern Brazil. Just over a fifth (22% of the species is also known to occur in the Amazon basin and only a few are more widely distributed in South American.

  7. Ehrlichia sp. infection in carthorses of low-income owners, Southern Brazil.

    Science.gov (United States)

    Vieira, Thállitha S; Vieira, Rafael F; Krawczak, Felipe S; Soares, Herbert S; Guimarães, Ana M; Barros-Filho, Ivan R; Marcondes, Mary; Labruna, Marcelo B; Biondo, Alexander W; Vidotto, Odilon

    2016-10-01

    Although well established in dogs, Ehrlichia sp. infection has been scarcely reported in horses. The aim was to perform a comprehensive serological and molecular survey for the detection of Ehrlichia spp. in carthorses from Southern Brazil. Blood samples from 190 carthorses from Paraná State were sampled. Horses were also tested for Borrelia burgdorferi and Anaplasma phagocytophilum. Anti-Ehrlichia sp. antibodies were detected by a commercial rapid ELISA, and immunofluorescence antibody assays (IFA) with E. chaffeensis and E. canis as crude antigens. The molecular and phylogenetic analysis of Ehrlichia sp. was based on 16S rRNA and dsb genes. A total of 52 (27.4%), 4 (2.1%), and 3 (1.6%) horses were positive for Ehrlichia spp., Anaplasma spp. and Borrelia burgdorferi, respectively, by the commercial rapid ELISA. Thirty-eight (20.0%) and 37 (19.5%) horses showed anti-E. chaffeensis and anti-E. canis antibodies by IFA, respectively. One blood sample that also showed anti-E. chaffeensis antibodies was PCR positive for the 16S rRNA and dsb genes of Ehrlichia spp., showing an identity of>98.0% to the uncultured Ehrlichia sp. previously detected in Brazilian jaguars (Panthera onca). Anti-Ehrlichia sp. antibodies and Ehrlichia DNA were detected in carthorses from Southern Brazil, which may post public health concerns due to intimate contact with low-income owners. This is the first report of a natural infection of this bacteria in horses from South America. Clinical signs and the tick vector remain unknown.

  8. CONDITIONING FACTORS IN SUSTAINABLE DEVELOPMENT OF THE NORTHERN COAST OF SÃO PAULO STATE – THE EXAMPLE OF LAGOINHA CREEK CATCHMENT BASIN – UBATUBA – SP, BRAZIL = CONDICIONANTES DO DESENVOLVIMENTO SUSTENTÁVEL DO LITORAL NORTE PAULISTA – O EXEMPLO DA BACIA DO CÓRREGO DA LAGOINHA – UBATUBA – SP, BRASIL

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    Luis Roberto Cottas

    2003-01-01

    Full Text Available The Northern Coast of Sao Paulo State is naturally endowed for the tourismrelated activities, especially focused on the use of natural resources, of beaches and coastal waters. The systematic studies performed by CETESB on the quality of coastal waters revealed the degradation in their quality, especially from domestic sewagecontamination. The purpose of the performance of this work was to find the conditioning factors for a sustainable tourism-based development, using a representative area as a model. The chosen area was the drainage basin of Lagoinha creek in the county of Ubatuba. This choice was the result of its physical and anthropic haracteristics typical of the region. Basic thematic and integrated maps were made on a scale of 1:10,000. The description was made of the current status of this geo-system and the relevant local legislation while studies were carried out to correlate this area in the regional context. Space analysis methods, lists and matrixes were used to interpret the data. The conditioning factors were identified as being, geologic formations, water resources, legislation, the road system, relative variation in the average sea level and the current spread of urbanization. Suggestions are offered to mitigate the effects of anthropic action on the environmental quality that will prejudice regional tourism. = O Litoral Norte do Estado de São Paulo tem uma vocação natural para atividades relacionadas ao turismo, especialmente sob o prisma da utilização dos recursos naturais das praias e águas costeiras. As análises sistemáticas realizadas pela CETESB sobre a qualidade das águas costeiras evidenciam degradação, especialmente pela contaminação com esgoto doméstico. O trabalho realizado procura identificar as condicionantes para o desenvolvimento sustentável baseado no turismo para uma área representativa tomada como modelo. A área escolhida foi a Bacia Hidrográfica do Córrego da Lagoinha, localizada no Munic

  9. Detection of Neospora sp. antibodies in cart horses from urban areas of Curitiba, Southern Brazil.

    Science.gov (United States)

    Villalobos, Eliana Monteforte Cassaro; Furman, Keiko Endo; Lara, Maria do Carmo Custódio de Souza Hunold; Cunha, Elenice Maria Sequetin; Finger, Mariane Angélica; Busch, Ana Paula Brenner; de Barros Filho, Ivan Roque; Deconto, Ivan; Dornbusch, Peterson Triches; Biondo, Alexander Welker

    2012-01-01

    Neospora caninum is a protozoan parasite which affects dogs as definitive hosts and several mammalian species as intermediate hosts mainly causing abortions and central nervous system disorders. The reemerging population of cart horses for carrying recycling material in urban areas of major cities in Brazil may have an impact on disease spreading, and these animals may be used as sentinels for environmental surveillance. Thus, the present study investigated the frequency of Neospora sp. antibodies in cart horses from Curitiba and surrounding areas, Paraná State, Southern Brazil. IgG antibodies against Neospora sp. were detected using indirect fluorescence antibody test (IFAT), and titers equal to or higher than 1:50 were considered reactive. Of all samples, 14/97 (14.4%) were positive: 2/29 (6.9%) were younger than 5; 5/26 (19.2%) between 6 and 9; and 6/31 (19.4%) older than 10 years of age. One of the 11 animals with unknown age was positive (9.1%). Cart horses are likely to be more exposed to dog feces and to Neospora sp. oocyst contamination in urban settings and a lower frequency of disease in dogs may have a negative impact on horse infection risk in these areas.

  10. Lymnaea rupestris sp. n. from Southern Brazil (Pulmonata: Lymnaeidae

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    W. Lobato Paraense

    1982-12-01

    Full Text Available A new species of South American lymnaeid snail, Lymnaea rupestris, is described. So far it has been found only in its type-locality, Nova TeuTõnia, a village in the municipality of Seara (27° 07' S, 52° 17' W, state of Santa Catarina, Brazil. It is distinguishable, by characteristics of the shell and internal organs, from the other two lymnaeid species known to occur in the area, Lymnaea columella and L. viatrix. Its shell has 4 markedly shouldered whorls, deep suture, ovoid or rounded aperture occupying about half the length of the shell, and reaches about 6 mm in length in adults; in columella and viatrix the shell has 4-5 rounded whorls, shallow suture, and reaches over 10 mm in adults; the aperture is ovoid, occupying about half the length of the shell in viatrix, about two thirds in columella. Anatomically it is readily separated from L. columella by the shape of the ureter, straight in rupestris, with a double flexure in columella. Comparison with L. viatrix shows the following main differences: distalmost portion of the oviduct with a low, caplike lateral swelling in rupestris, with a well-developed pouch in viatrix; uterus bent abruptly caudalward in rupestris, only slightly curved rightward in viatrix; basal half of the spermathecal duct hidden by the prostate in rupestris, wholly visible or nearly so in viatrix; spermiduct sinuous and uniformly wide in rupestris, straight and gradually narrowing in viatrix; prostate more than half as long and nearly as wide as the nidamental gland, and with a slit-like lumen in cross-section in rupestris, less than half as long as and much narrower than the nidamental gland, and with an inward fold in cross-section in viatrix; penial sheath about as long and as wide as the prepuce in rupesris, shorter and narrower than the prepuce in viatrix. An important ecological characteristic of L. rupestris is its habitat on wet rocks most often outside bodies of water, although in close proximity to them

  11. Description of Lutzomyia (Trichophoromyia) nautaensis n. sp. (Diptera: Psychodidae) from the Peruvian Amazon Basin.

    Science.gov (United States)

    Fernandez, Roberto; Lopez, Victor; Cardenas, Roldan; Requena, Edwin

    2015-07-01

    A new species of sand fly, which we describe as Lutzomyia (Trichophoromyia) nautaensis n. sp., was collected in the northern Peruvian Amazon Basin. In this region of Peru, cutaneous leishmaniasis is transmitted primarily by anthropophilic sand flies; however, zoophilic sand flies of the subgenus Trichophoromyia may also be incriminated in disease transmission. Detection of Leishmania spp. in Lutzomyia auraensis Mangabeira captured in the southern Peruvian Amazon indicates the potential of this and other zoophilic sand flies for human disease transmission, particularly in areas undergoing urban development. Herein, we describe Lutzomyia (Trichophoromyia) nautaensis n. sp., and report new records of sand flies in Peru.

  12. Occurrence of Euplatypus parallelus, Euplatypus sp. (col.: Euplatypodidae and Xyleborus affinis (col.: Scolytidae in Pinus sp. in Ribas do Rio Pardo, Mato Grosso do Sul, Brazil

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    Zanuncio José Cola

    2002-01-01

    Full Text Available Wood borer species of the families Euplatypodidae and Scolytidae were observed attacking trees of Pinus sp. in the Municipality of Ribas do Rio Pardo, state of Mato Grosso do Sul, Brazil, in March 2000. This plantation had been previously burned in an accidental fire in January 2000, causing the trees to become partially or totally unhealthy, rendering them more susceptible to attack of these pests. Galleries of these wood borers were opened with a chisel to observe parameters such as their direction and form of these galleries. Species observed as wood borers of Pinus sp. were Euplatypus parallelus, Euplatypus sp. (Coleoptera: Euplatypodidae and Xyleborus affinis (Coleoptera: Scolytidae.

  13. Masteria manauara sp. nov., the first masteriine species from Brazil (Araneae: Dipluridae: Masteriinae

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    Rogério Bertani

    2013-08-01

    Full Text Available A new species of Masteria L. Koch, 1873 from Manaus, Brazil, Masteria manauara sp. nov., is herein described. The specimens were collected by hand or using litter bags in the leaf litter around Attalea attaleoides (Barb. Rodr. palm trees. The new species resembles Masteria colombiensis Raven, 1981 by lacking paraembolic apophysis on male copulatory organs and having spiniform apophysis on the ventral metatarsus I. It differs in the tibial spur, made of two subdistal, spiniform and converging spurs. Females are unique in having two spermathecae with slender helicoidal stalks. Males and females have only six eyes, and are tiny, even when compared with other Masteria species.

  14. Kazachstania rupicola sp. nov., a yeast species isolated from water tanks of a bromeliad in Brazil.

    Science.gov (United States)

    Safar, Silvana Vilas Boas; Gomes, Fátima C O; Marques, Andréa R; Lachance, Marc-André; Rosa, Carlos A

    2013-03-01

    Two isolates of a novel yeast species were obtained from water tanks (phytotelmata) of the bromeliad Vriesea minarum collected in a tableland ('campo rupestre') ecosystem in Brazil. The sequences of the D1/D2 domains of the large-subunit rRNA gene showed that this species is related to Kazachstania exigua and others, from which it differs by 8-10 nucleotide substitutions. The novel species Kazachstania rupicola sp. nov. is proposed to accommodate these isolates. The type strain is UFMG-BRO-80(T) ( = CBS 12684(T)  = CBMAI 1466(T)).

  15. HANTAVIRUS PULMONARY SYNDROME (HPS IN GUARIBA, SP, BRAZIL: REPORT OF 2 CASES

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    FIGUEIREDO Luiz Tadeu M.

    1999-01-01

    Full Text Available Human infections caused by a hantavirus were reported in different regions of the State of São Paulo (SP, Brazil during the first six months of 1998. Two cases of fatal pulmonary syndrome occurred in May of 1998 in the City of Guariba, located in the Northeastern Region of SP. Both patients worked in a corn storage barn infested by rodents. These patients, after 2 or 3 days of non-specific febrile illness, developed a severe interstitial pneumonia spreading widely in both lungs, causing respiratory failure and death. At autopsy both patients showed lung interstitial edema with immunoblast-like mononuclear cell infiltrates, consistent with a viral etiology. Hantavirus infection was diagnosed by ELISA in both cases and by RT-PCR in one of the patients. Aspects of the clinical presentation, physiopathology and differential diagnosis of Hantavirus Pulmonary Syndrome are discussed.

  16. Description of Lutzomyia (Trichophoromyia) nautaensis n. sp. (Diptera: Psychodidae) from the Peruvian Amazon Basin

    OpenAIRE

    Fernandez, Roberto; Lopez,Victor; Cardenas, Roldan; Requena, Edwin

    2015-01-01

    A new species of sand fly, which we describe as Lutzomyia (Trichophoromyia) nautaensis n. sp., was collected in the northern Peruvian Amazon Basin. In this region of Peru, cutaneous leishmaniasis is transmitted primarily by anthropophilic sand flies; however, zoophilic sand flies of the subgenus Trichophoromyia may also be incriminated in disease transmission. Detection of Leishmania spp. in Lutzomyia auraensis Mangabeira captured in the southern Peruvian Amazon indicates the potential of thi...

  17. Seasonal study of contamination by metal in water and sediment in a sub-basin in the southeast of Brazil

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    WAC. Chiba

    Full Text Available The spatial and temporal occurrence of heavy metals (Al, Cd, Pb, Zn, Cr, Co, Cu, Fe, Mn and Ni in water and sediment samples was investigated in a sub-basin in the southeast of Brazil (São Carlos, SP. All samples were analysed using the USEPA adapted metal method and processed in an atomic absorption spectrophotometer. The discriminant analysis demonstrated that there are significant seasonal differences of metal distribution in the water data, but there are no differences to sediment. The basin studied has high levels of contamination by toxic metals in superficial water and sediment. The superficial water, in the rainy season, presented high levels of Cr, Ni, Pb and Cd, while in the dry season it presented high levels of Zn and Ni. The Principal Component Analysis demonstrated that the season has a huge influence on the levels, types and distribution of metals found in water. The source of contamination was probably diffuse, due to products such as batteries and fluorescent lamps, whose dump discharge can contaminate the bodies of water in the region in the rainy season. Due to fires from the harvest of sugar cane, high levels of Zn were found into the environment, in the dry season.

  18. Chemotaxonomical aspects of lower Cretaceous amber from Reconcavo Basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Pereira, Ricardo; Azevedo, Debora A., E-mail: ricardopereira@iq.ufrj.b, E-mail: debora@iq.ufrj.b [Universidade Federal do Rio de Janeiro (IQ/UFRJ), RJ (Brazil). Inst. de Quimica; Carvalho, Ismar S. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Inst. de Geociencias; Fernandes, Antonio Carlos S. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Museu Nacional. Dept. de Geologia e Paleontologia

    2011-07-01

    The chemical composition of Lower Cretaceous amber samples from Reconcavo Basin (Salvador, Bahia) was performed by GC-MS to characterize possible botanical sources. The compounds identified were hydrocarbonic and polar diterpenoids, such as abietane, dehydroabietane, tetrahydroretene, dehydroabietol, dehydroabietic acid, ferruginol and sugiol. Other diterpenoid classes were not detected as well as triterpenoids. The composition of the extracts and chemosystematic data allows relating the samples to conifers of Podocarpaceae or Cheirolepidiaceae families due to detection of ferruginol, a specific biomarker to these families. The data concerning Cretaceous amber in the Reconcavo Basin provided information concerning the presence of a resinous flora in the Maracangalha Formation sediments during the Lower Cretaceous. (author)

  19. New record of Pelecitus sp. (Nematoda, Onchocercidae as a parasite of Athene cunicularia (Strigiformes, Strigidae in southeastern Brazil

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    Tarcísio Macedo Silva

    Full Text Available The aim of this study was to report the burrowing owl Athene cunicularia as a new host for the filarid nematode Pelecitus sp. in southeastern Brazil for the first time, as well as reporting the occurrence of this nematode species in the body cavity, near the cervical air sac and lung region. This study contributes towards knowledge of parasitism in Brazilian wild birds and an anatomical region of the host as an infection site for Pelecitus sp.

  20. New data on the stem and leaf anatomy of two conifers from the Lower Cretaceous of the Araripe Basin, northeastern Brazil, and their taxonomic and paleoecological implications

    Science.gov (United States)

    Batista, Maria Edenilce Peixoto; Silva, Delmira da Costa; Sales, Marcos A. F.; Sá, Artur A.; Saraiva, Antônio A. F.; Loiola, Maria Iracema Bezerra

    2017-01-01

    Pseudofrenelopsis and Brachyphyllum are two conifers that were part of the Lower Cretaceous (Aptian) taphoflora of the Crato Formation, Araripe Basin, northeastern Brazil. The former genus includes, so far, P. capillata and indeterminate species, whilst the latter is mainly represented by B. obesum, the most common plant megafossil recovered from that stratigraphic unit. Here, the stem and leaf anatomy of Pseudofrenelopsis sp. and B. obesum specimens is revisited, including the first report of some epidermal and vascular traits for both taxa from the Crato Formation. Along with its paleoecological significance, the new data suggest the presence of more than one Pseudofrenelopsis species in the Aptian taphoflora of the Araripe Basin and further support the taxonomic placement of B. obesum within Araucariaceae. PMID:28257466

  1. Large scale artificial rearing of Anastrepha sp.1 aff. fraterculus (Diptera: Tephritidae in Brazil

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    Julio Marcos Melges Walder

    2014-08-01

    Full Text Available Some species of the genus Anastrepha (Diptera: Tephritidae are successfully managed by matching the sterile insect technique with parasitoid releases. Such strategies used in integrated pest management can be implemented only where insect mass-rearing programs are feasible. In this study, we show the process of domestication, rearing technology and quality control data obtained from 54 generations of Anastrepha sp.1 aff. fraterculus (Wiedemann, 1830 kept under fully artificial conditions. Eggs were collected by an artificial oviposition panel consisting of one side of the cage made of blue voile fabric externally covered with a thin layer of silicon rubber. They were then air-bubbled in water at 25 ºC for 48 h before seeding. Larvae were reared on the regular laboratory artificial diet with 66 % of agar reduction turning over a semi-liquid diet, which reduced costs and improved insect quality. The adult and larval diets were composed of local ingredients including hydrolyzed yeast. When large-scale production of this fly is contemplated, the critical stage is larval development. This system of artificial rearing for A. fraterculus sp.1 developed in Brazil, allows for the production of a large number of insects of excellent quality using local ingredients and less agar in diet composition than the original medium used for this species. By reducing the interval of egg collection, the system might be optimized in terms of insect yield and, therefore, meet the demands of A. fraterculus sp.1 with regard to integrated pest management purposes.

  2. Amazon dams and waterways: Brazil's Tapajós Basin plans.

    Science.gov (United States)

    Fearnside, Philip M

    2015-09-01

    Brazil plans to build 43 "large" dams (>30 MW) in the Tapajós Basin, ten of which are priorities for completion by 2022. Impacts include flooding indigenous lands and conservation units. The Tapajós River and two tributaries (the Juruena and Teles Pires Rivers) are also the focus of plans for waterways to transport soybeans from Mato Grosso to ports on the Amazon River. Dams would allow barges to pass rapids and waterfalls. The waterway plans require dams in a continuous chain, including the Chacorão Dam that would flood 18,700 ha of the Munduruku Indigenous Land. Protections in Brazil's constitution and legislation and in international conventions are easily neutralized through application of "security suspensions," as has already occurred during licensing of several dams currently under construction in the Tapajós Basin. Few are aware of "security suspensions," resulting in little impetus to change these laws.

  3. Cytogenetic data on Ancistrus sp. (Siluriformes, Loricariidae) of the Paraguay River basin (MS) sheds light on intrageneric karyotype diversification

    Science.gov (United States)

    Prizon, Ana Camila; Borin-Carvalho, Luciana Andreia; Bruschi, Daniel Pacheco; Ribeiro, Marcos Otávio; Barbosa, Ligia Magrinelli; Ferreira, Greicy Ellen de Brito; Cius, Andréa; Zawadzki, Claudio Henrique; Portela-Castro, Ana Luiza de Brito

    2016-01-01

    Abstract Ancistrus Kner, 1854 is a diverse catfish genus, currently comprising 66 valid species, but karyotype data were recorded for 33 species, although only ten have their taxonomic status defined. Considerable karyotype diversity has been found within this genus, with 2n varying from 34 to 54 and structural variability including heteromorphic sex chromosomes. In many cases, uncertainty on the taxonomic status of the study populations hampers reliable interpretation of the complex chromosomal evolutionary history of the group. This study aims to present the first karyotype data for a population of the Ancistrus sp. collected in Criminoso stream (tributary of the Paraguay River Basin, Mato Grosso do Sul, Brazil) in which a combination of different chromosomal markers was used and results integrated in broad discussion on karyotype evolution in the genus. The specimens presented 2n=42 with 18m+16sm+8st and a single NOR revealed by silver nitrate and fluorescence in situ hybridization (FISH) with 18S rDNA probe, located in pair No. 10. Clusters of 5S rDNA were located in the pericentromeric region of three chromosomes: pair No. 1 (metacentric) and one of the homologues of the nucleolar pair No. 10. Heterogeneity in the molecular composition of the heterochromatin was confirmed by the association of C-banding and fluorochrome CMA3/DAPI-staining. Exploring the differential composition of constitutive heterochromatin in Ancistrus may provide an important perspective to understand genome organization and evolution within this group. Our data reinforce the chromosomal diversity present in Ancistrus genus and we discuss the potential sources these variation. The karyotype structure of Ancistrus sp. “Criminoso stream” appears to be consistent with the existence of a new candidate species. PMID:28123683

  4. Hemiodus iratapuru, a new species of Hemiodontidae from the Rio Jari, Amazon Basin, Brazil (Teleostei, Characiformes).

    Science.gov (United States)

    Langeani, F; Moreira, C R

    2013-04-01

    Hemiodus iratapuru, a new species of the Hemiodontidae from the Rio Iratapuru, a left bank tributary of the Rio Jari, Amazon Basin, Brazil, is described. The new species is diagnosed from other species of Hemiodus by modifications in the ectopterygoid, tooth form, scale counts, dorsal-fin form and colour pattern. The new species is proposed to be related to the Hemiodus quadrimaculatus species group.

  5. Neotropical Monogenoidea. 24. Rhinoxenus bulbovaginatus n. sp. (Dactylogyridae, Ancyrocephalinae from the nasal cavity of Salminus maxillosus (Osteichthyes, Characidae from the Rio Paraná, Paraná, Brazil

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    Walter A. Boeger

    1995-12-01

    Full Text Available Rhinoxenus bulbovaginatus n. sp. is described from the nose of Salminus maxillosus (Characidae collected in the basin of the rio Paraná, near the city of Porto Rico, state of Paraná, Brazil. The new species can be differentiated from the other three species in the genus by the morphology of the copulatory complex, vagina, and ventral anchor. The sister group relationship of the known species of Rhinoxenus was determined using techniques of Phylogenetic Systematics (Cladism. The resulting cladogram (C.I.=100% indicates that the new species is most closely related to R. piranhus Kritsky, Boeger and Thatcher, 1988. The other two species of the genus, R. arietinus Kritsky, Boeger and Thatcher, 1988 and R. nyttus Kritsky, Boeger and Thatcher, 1988, both parasites of Anostomidae fishes, have a paraphyletic position in the cladogram, suggesting that the origin of at least one of them can not be associated to cospeciation.

  6. Meloidogyne luci n. sp. (Nematoda: Meloidogynidae), a root-knot nematode parasitising different crops in Brazil, Chile and Iran

    NARCIS (Netherlands)

    Carneiro, R.M.D.G.; Correa, V.R.; Almeida, M.R.A.; Gomes, A.C.M.M.; Deimi, A.M.; Castagnone-Sereno, P.; Karssen, G.

    2014-01-01

    A new root-knot nematode parasitising vegetables, flowers and fruits in Brazil, Iran and Chile, is described as Meloidogyne luci n. sp. The female has an oval to squarish perineal pattern with a low to moderately high dorsal arc and without shoulders, similar to M. ethiopica. The female stylet is ro

  7. Population dynamics of Cyrtomon luridus Boheman (Coloptera: Curculionidae on Duboisia sp. (Solanaceae in Brazil

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    Paulo Tironi

    2005-01-01

    Full Text Available Cyrtomon luridus (Boheman has adapted to the medicinal plant Duboisia sp., introduced from Australia. Its larvae feed on roots, causing up to 100% mortality damages. The population dynamics and biological cycle were studied to determine future control methods in Duboisia sp., in Arapongas, Paraná State, Brazil, from 1993 to 1996. C. luridus presented annual life cycle in Duboisia sp. under natural conditions. The larval development period was 120 to 150 days, from January to May, reaching an average size of 19.0 ± 2.0 mm in soil depth ranging on 24.9 ± 8.6 cm to 45.0 ± 10.0 cm. The beginning of the pupal phase happened in April. The larval-adult viability ranged on 7.5% to 19.6%. The typical symptoms of attack appeared in an infestation level of 60 larvae per plant. The first adults came out in July, six months after larvae hatching. However, adults came out from soil only in September, at the beginning of the rainy season, reaching the peak of emergency in October, outspreading until January. In laboratory (25ºC, 70% R.H., females longevity averaged 113.7 ± 15.2 days. In this period, laying capacity was 42.7 ± 7.9 egg masses, with 9.4 ± 0.61 eggs each, totaling 402 ± 72.9 eggs per female. Adults C. luridus were found parasitized by Microctonus sp. (Loan (Hymenoptera: Braconidae. Solanaceae species Solanum mauritianum Scopoli and Cestrum intermedium Sendt. were identified as host plants of C. luridus.

  8. Cytherellid species (Ostracoda) and their significance to the Late Quaternary events in the Santos Basin, Brazil

    Science.gov (United States)

    Bergue, C.T.; Coimbra, J.C.; Cronin, T. M.

    2007-01-01

    Four autochthonous cytherellid species (Cytherella serratula (BRADY, 1880), C. hermargentina WHATLEY et al. 1998, C. pleistocenica sp. nov. and C. santosensis sp. nov.) have been identified from two offshore cores (44 samples) within the Santos Basin. The distribution of these ostracodes is controlled by local hydrological conditions such as the temperature and, possibly, the oxygen minimum zone (OMZ). However, these factors cannot explain completely the species occurrence in the analysed cores, and relative sea level changes and productivity variation driven by climatic changes are proposed as additional explanations for the faunal distribution pattern. ?? E. Schweizerbart'sche Verlagsbuchhandlung (Na??gele u. Obermiller), 2007.

  9. Navicordulia aemulatrix sp. nov. (Odonata, Corduliidae from northeastern Santa Catarina State, Brazil

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    Ângelo Parise Pinto

    2010-01-01

    Full Text Available Navicordulia aemulatrix sp. nov. (holotype male deposited in MZSP: Brazil, Santa Catarina State, [São Bento do Sul municipality, 26°14'58"S, 49°22'59"W], [railroad station] Rio Vermelho, II.1952 is described and illustrated based on three males. The long cercus (2.9-3.2 mm places this species in the longistyla-group together with N. kiautai, N. longistyla and N. nitens but it differs from them mainly by the shape of cercus, with carinated part occupying 0.33 of cercus total length, and also by dorsal, ventro-medial and ventro-lateral tubercles developed. An unusual process on tergal portion of prothorax is reported for the first time in Navicordulia. The rate of description of new species of South American 'Corduliidae' is discussed. A map with records of Atlantic Forest Navicordulia species and a list of Brazilian corduliids by state are also presented.

  10. Description of Leishmania (Leishmania forattinii sp. n., a new parasite infecting opossums and rodents in Brazil

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    Elizaide L. A. Yoshida

    1993-09-01

    Full Text Available A new parasite species of Leishmania is described, L. (Leishmania forattinii sp. n., which was isolated from a pooled triturate of liver and spleen of a opossum (Didelphis marsupialis aurita and from skin samples from a rodent (Proechmys iheringi denigratus, captured in primary forest on the Atlantic Cost of Brazil. Our results on the basis of biological and molecular criteria indicate that this taxonomically distinct parasite ias a new species of the L. mexicana complex, but closely related to L. (L. aristidesi Laison & shaw, 1979, as revelated by phenetic and phylogenetic numerical analyses of the enzyme data. L. forattinii was clearly distinguishable from other Leishmania species of the genus usisng enzyme electrophoresis, monoclonal antibodies, molecular karyotypes, analysis of restriction enzyme digestion patterns of kinetoplast DNA (kDNA, as well as the use of kDNA hybridization procedures.

  11. Study of postures in sugarcane cutters in the Pontal of Paranapanema-SP, Brazil.

    Science.gov (United States)

    de Anchieta Messias, Iracimara; Okuno, Emico

    2012-01-01

    The expansion of sugarcane monoculture in Brazil in the last decades has pointed out to the necessity of considering the question of sugarcane cutters occupational health. In this work we present a cross-sectional study aiming to examine the occupational posture of a group of sugarcane cutters, which work in a cane field located in the region of Pontal do Paranapanema- SP, Brazil. The study was made using the Ergonomic Analysis of Work - EAW methodology and the postural analysis method by Win-OWAS. Through the obtained records of postures, it was observed that during a workday the sugarcane cutters remain standing erect on two legs or in one leg 66% of the time and that their trunk remain tilted and in rotation, according to 63% of the positions categorized. It was also observed that the sugarcane cutter trunk performs repetitive and boundless movements during his routine of work, which can expose this individual to additional wear of their musculoskeletal functions. The activities in which the individual engages have favorable or adverse influence on his posture. The repetitive movements involved in specialized occupations are equivalent to repeated exercises, thus may be responsible for the excessive development of certain muscle groups. The study suggests that the postures adopted by sugarcane cutters can overload their musculoskeletal system and predispose the cutters to work-related musculoskeletal diseases.

  12. In vitro culture of a novel genotype of Ehrlichia sp. from Brazil.

    Science.gov (United States)

    Zweygarth, E; Schöl, H; Lis, K; Cabezas Cruz, A; Thiel, C; Silaghi, C; Ribeiro, M F B; Passos, L M F

    2013-11-01

    Ehrlichiae are obligate intracytoplasmic Gram-negative, tick-borne bacteria belonging to the Anaplasmataceae family. Ehrlichioses are considered emerging diseases in both humans and animals. Several members of the genus Ehrlichia have been isolated and propagated in vitro. This study describes the continuous propagation of a Brazilian Ehrlichia sp. isolate in IDE8 tick cells, canine DH82 cells and bovine aorta cells. Initially, the organisms were isolated from the haemolymph of a Rhipicephalus (Boophilus) microplus tick into IDE8 cells. Infected IDE8 cells were brought from Brazil to Germany, where the organisms were continuously propagated in IDE8, DH82 and bovine aorta cells. Bovine aorta cells were infected and propagated for 3 months, corresponding to six subcultures, whereas the other two infected cell lines were kept for more than 1 year. During the cultivation period, 36 and 14 subcultures were carried out in IDE8 and DH82 cell cultures, respectively. Reinfection of IDE8 cells with organisms grown in DH82 cells was achieved. Sequence analysis made with a fragment of the 16S rRNA gene showed that this Ehrlicha sp. is closely related to Ehrlichia canis. However, the maximum likelihood phylogenetic tree shows that it falls in a separate phylogenetic clade from E. canis.

  13. Water environments: anthropogenic pressures and ecosystem changes in the Atlantic drainage basins of Brazil.

    Science.gov (United States)

    Marques, Marcia; da Costa, Monica F; Mayorga, Maria Irles de O; Pinheiro, Patrícia R

    2004-02-01

    Densely occupied drainage basins and coastal zones in developing countries that are facing economic growth are likely to suffer from moderate to severe environmental impacts regarding different issues. The catchment basins draining towards the Atlantic coast from northeastern to southern Brazil include a wide range of climatic zones and diverse ecosystems. Within its borders lies the Atlantic rain forest, significant extensions of semiarid thorn forests (caatinga), vast tree and scrub woodlands (cerrado) and most of the 6670 km of the Brazilian coast and its marine ecosystems. In recent decades, human activities have increasingly advanced over these natural resources. Littoralization has imposed a burden on coastal habitats and communities. Most of the native vegetation of the cerrado and caatinga was removed and only 7% of the original Atlantic rainforest still exists. Estuaries, bays and coastal lagoons have been irreversibly damaged. Land uses, damming and water diversion have become the major driving forces for habitat loss and aquatic ecosystem modification. Regardless of the contrast between the drought-affected northeastern Brazil and the much more prosperous and industrialized southeastern/southern Brazil, the impacts on habitat and communities were found equally severe in both cases. Attempts to halt environmental degradation have not been effective. Instead of focusing on natural resources separately, it is suggested that more integrated environmental policies that focus on aquatic ecosystems integrity are introduced.

  14. Cordiamyia globosa gen.n. e sp.n. (Diptera, Cecidomyiidae, Cecidomyiidi associado com Cordia Verbenacea DC. (Boraginaceae no Brasil Cordiamyia globosa gen.n. and sp.n. (Diptera, Cecidomyiidae associated with Cordia verbekacea DC. (Boraginaceae in Brazil

    Directory of Open Access Journals (Sweden)

    Valéria Cid Maia

    1996-01-01

    Full Text Available Cordiamyia globosa gen.n., sp.n. (Diptera, Cecidomyiidae, Cecidomyiidi associated with Cordia verbenacea (Boraginaceae, in Brazil, is described and illustrated (larva, pupa, male, female and gall.

  15. XX/XO, a rare sex chromosome system in Potamotrygon freshwater stingray from the Amazon Basin, Brazil.

    Science.gov (United States)

    de Souza Valentim, Francisco Carlos; Porto, Jorge Ivan Rebelo; Bertollo, Luiz Antonio Carlos; Gross, Maria Claudia; Feldberg, Eliana

    2013-09-01

    Potamotrygonidae is a representative family of South American freshwater elasmobranchs. Cytogenetic studies were performed in a Potamotrygon species from the middle Negro River, Amazonas, Brazil, here named as Potamotrygon sp. C. Mitotic and meiotic chromosomes were analyzed using conventional staining techniques, C-banding, and detection of the nucleolus organizing regions (NOR) with Silver nitrate (Ag-NOR). The diploid number was distinct between sexes, with males having 2n = 67 chromosomes, karyotype formula 19m + 8sm + 10st + 30a, and fundamental number (FN) = 104, and females having 2n = 68 chromosomes, karyotype formula 20m + 8sm + 10st + 30a, and FN = 106. A large chromosome, corresponding to pair number two in the female karyotype, was missing in the male complement. Male meiotic cells had 33 bivalents plus a large univalent chromosome in metaphase I, and n = 33 and n = 34 chromosomes in metaphase II. These characteristics are consistent with a sex chromosome system of the XX/XO type. Several Ag-NOR sites were identified in both male and female karyotypes. Positive C-banding was located only in the centromeric regions of the chromosomes. This sex chromosome system, which rarely occurs in fish, is now being described for the first time among the freshwater rays of the Amazon basin.

  16. Ergasilus trygonophilus sp. nov. (Copepoda: Ergasilidae a branchial parasite of freshwater stingrays (Potamotrygonidae from state of Pará, Brazil

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    Marcus V. Domingues

    2010-10-01

    Full Text Available Ergasilus trygonophilus sp. nov. is described from freshwater stingrays (Potamotrygon spp. and Plesiotrygon iwamae Rosa, Castello & Thorson, 1987 from the state of Pará, Brazil. The new species differs from all known species of Ergasilus Nordman, 1832 from Brazilian waters by possessing: (1 an elongate bullet-shaped cephalosome; (2 antennule setal formula 1: 10: 4: 4: 2 + 1 ae: 6 + 1 ae; (3 maxillule bearing two distal setae; and (4 terminal endopodal segment of leg 1 with rosette-like array of blunt spinules. This is the first species of a freshwater stingray Ergasilus reported from Brazil.

  17. New petrified forest in Maranhão, Permian (Cisuralian) of the Parnaíba Basin, Brazil

    Science.gov (United States)

    da Conceição, Domingas Maria; de Andrade, Luiz Saturnino; Cisneros, Juan Carlos; Iannuzzi, Roberto; Pereira, Agostinha Araújo; Machado, Francisco Carlos

    2016-10-01

    This work presents a new fossil plant-bearing area located in the municipalities of Duque Bacelar and Coelho Neto, Maranhão State, Brazil, recovered from lower Permian (Cisuralian) strata of the Pedra de Fogo Formation, northeastern portion of the Parnaíba Basin. The area comprises more than five exposures with assemblages formed mostly of large gymnosperm woods, a number of them in life-position (reaching up to ∼2.30 m in height and 1.15 m in diameter) and, in lesser degree, of horizontal tree-fern stems (up to 5 m in length), some of them being referable to Psaronius sp. The fossils are recorded in sedimentary beds of continental origin that accumulated in shallow, nearshore areas of large lakes, which eventually were affected by rapid burial episodes generated by non-channelized, high energy fluvial systems. The new fossil assemblages are included within lacustrine rocks placed at the base of the Pedra de Fogo Formation, i.e., Sílex Basal Member, near the contact with the underlying Piauí Formation (Pennsylvanian). This observation contrasts with previous studies at the southwestern portion of the basin, where the stratigraphic position of plant fossils is referred to the upper Pedra de Fogo Formation (Trisidela Member) or even to the overlying Motuca Formation. The new sites currently suffer damage from human activities and require urgent actions in order to protect them. Based on the current laws, some measures of protection for these sites are discussed and proposed herein. xml:lang="pt"

  18. A new Hyphessobrycon (Ostariophysi: Characiformes: Characidae) from the middle Amazon basin, Brazil.

    Science.gov (United States)

    Lima, Flávio C T; Coutinho, Daniel P; Wosiacki, Wolmar B

    2014-10-08

    Hyphessobrycon montagi, new species, is described from tributaries of the Rio Arapiuns, a left margin affluent of the lower Rio Tapajós, Amazon basin, Pará, Brazil. The new species can be diagnosed from all its congeners by the possession of a combination of two well-defined humeral blotches, connected by a narrow stripe, and a caudal peduncle blotch. A putatively monophyletic Hyphessobrycon heterorhabdus species-group, restricted to H. heterorhabdus, H. amapaensis, and H. eschwartzae, is herein proposed based on shared derived features of color pattern. Alternative proposals of a "Hyphessobrycon heterorhabdus group" presented in the recent literature are evaluated and criticized.

  19. Spatial analysis of avoidable hospitalizations due to tuberculosis in Ribeirao Preto, SP, Brazil (2006-2012

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    Mellina Yamamura

    2016-01-01

    Full Text Available ABSTRACT OBJECTIVE To describe the spatial distribution of avoidable hospitalizations due to tuberculosis in the municipality of Ribeirao Preto, SP, Brazil, and to identify spatial and space-time clusters for the risk of occurrence of these events. METHODS This is a descriptive, ecological study that considered the hospitalizations records of the Hospital Information System of residents of Ribeirao Preto, SP, Southeastern Brazil, from 2006 to 2012. Only the cases with recorded addresses were considered for the spatial analyses, and they were also geocoded. We resorted to Kernel density estimation to identify the densest areas, local empirical Bayes rate as the method for smoothing the incidence rates of hospital admissions, and scan statistic for identifying clusters of risk. Softwares ArcGis 10.2, TerraView 4.2.2, and SaTScanTM were used in the analysis. RESULTS We identified 169 hospitalizations due to tuberculosis. Most were of men (n = 134; 79.2%, averagely aged 48 years (SD = 16.2. The predominant clinical form was the pulmonary one, which was confirmed through a microscopic examination of expectorated sputum (n = 66; 39.0%. We geocoded 159 cases (94.0%. We observed a non-random spatial distribution of avoidable hospitalizations due to tuberculosis concentrated in the northern and western regions of the municipality. Through the scan statistic, three spatial clusters for risk of hospitalizations due to tuberculosis were identified, one of them in the northern region of the municipality (relative risk [RR] = 3.4; 95%CI 2.7–4,4; the second in the central region, where there is a prison unit (RR = 28.6; 95%CI 22.4–36.6; and the last one in the southern region, and area of protection for hospitalizations (RR = 0.2; 95%CI 0.2–0.3. We did not identify any space-time clusters. CONCLUSIONS The investigation showed priority areas for the control and surveillance of tuberculosis, as well as the profile of the affected population, which shows

  20. Spatial analysis of avoidable hospitalizations due to tuberculosis in Ribeirao Preto, SP, Brazil (2006-2012)

    Science.gov (United States)

    Yamamura, Mellina; de Freitas, Isabela Moreira; Santo, Marcelino; Chiaravalloti, Francisco; Popolin, Marcela Antunes Paschoal; Arroyo, Luiz Henrique; Rodrigues, Ludmila Barbosa Bandeira; Crispim, Juliane Almeida; Arcêncio, Ricardo Alexandre

    2016-01-01

    ABSTRACT OBJECTIVE To describe the spatial distribution of avoidable hospitalizations due to tuberculosis in the municipality of Ribeirao Preto, SP, Brazil, and to identify spatial and space-time clusters for the risk of occurrence of these events. METHODS This is a descriptive, ecological study that considered the hospitalizations records of the Hospital Information System of residents of Ribeirao Preto, SP, Southeastern Brazil, from 2006 to 2012. Only the cases with recorded addresses were considered for the spatial analyses, and they were also geocoded. We resorted to Kernel density estimation to identify the densest areas, local empirical Bayes rate as the method for smoothing the incidence rates of hospital admissions, and scan statistic for identifying clusters of risk. Softwares ArcGis 10.2, TerraView 4.2.2, and SaTScanTM were used in the analysis. RESULTS We identified 169 hospitalizations due to tuberculosis. Most were of men (n = 134; 79.2%), averagely aged 48 years (SD = 16.2). The predominant clinical form was the pulmonary one, which was confirmed through a microscopic examination of expectorated sputum (n = 66; 39.0%). We geocoded 159 cases (94.0%). We observed a non-random spatial distribution of avoidable hospitalizations due to tuberculosis concentrated in the northern and western regions of the municipality. Through the scan statistic, three spatial clusters for risk of hospitalizations due to tuberculosis were identified, one of them in the northern region of the municipality (relative risk [RR] = 3.4; 95%CI 2.7–4,4); the second in the central region, where there is a prison unit (RR = 28.6; 95%CI 22.4–36.6); and the last one in the southern region, and area of protection for hospitalizations (RR = 0.2; 95%CI 0.2–0.3). We did not identify any space-time clusters. CONCLUSIONS The investigation showed priority areas for the control and surveillance of tuberculosis, as well as the profile of the affected population, which shows important

  1. Seabed acoustic classification in the Pelotas basin, Brazil

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    Paloma Lumi Costa

    2013-03-01

    Full Text Available The present study sought to develop a seabed map of the region of the Pelotas Basin using acoustic methods. A total number of 1,507,823 seabed reflectivity data, collected during six oceanographic surveys, were processed to generate a seabed map. Data processing consisted of the classification of the acoustic parameter BSBS (Bottom Surface Backscattering Strength obtained with the Scientific Echosounder EK 500 operating at a frequency of 38 kHz. BSBS is expressed in decibels (dB, and corresponds to a logarithm of the ratio between incident acoustic energy and the energy reflected by the seabed. Four BSBS value classes, associated with different sediment types, were established. High BSBS values are associated with coarse sediments, whereas low values indicate fine sediments. A seabed reflectivity map was generated using the Natural Neighbor method to interpolate the BSBS values organized according to the pre-established classes. Four features with high BSBS values were identified at 100-200 m depth. The largest one was found in the region of Santa Marta Cape and attributed mainly to consolidated seabed and/or the presence of biodetritic material, according to comparison with maps available in the literature. Above 500m depth, there was a predominance of acoustically low reflectivity sea floor, which was attributed to the presence of muddy sediment. Considering the lack of information on the seabed at great depths, the acoustic method was shown to be an alternative tool to obtain data on seabed characteristics in these regions.O presente estudo teve como objetivo principal a realização de um mapeamento de fundo, através de metodologia acústica, para a região da Bacia de Pelotas. Um total de 1.507.823 dados de refletividade de fundo provenientes de seis Cruzeiros Oceanográficos foi processado para elaboração de um mapa de refletividade de fundo. Esse processamento consistiu numa classificação dos valores do parâmetro acústico BSBS

  2. Estimating the remaining potential of the Reconcavo basin, Brazil: a basin modeling and material balance approach

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Thamy C.S.D.; Goncalves, Felix T.T.; Bedregal, Ricardo P.; Cuinas Filho, Elio P. [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Modelagem de Bacias (LAB2M); Landau, Luiz [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Metodos Computacionais em Engenharia (LAMCE)

    2004-07-01

    The existence of a petroleum system requires a number of essential elements (traps and source, reservoir and seal rocks) and processes (HC generation and migration and trap formation) besides an adequate timing among the elements and processes and a positive balance between the HC generation and losses due to (re)migration. Due to the complexity of petroleum systems dynamics, the basin modeling technique is the only one that allows the integration of all geological, geophysical and geochemical data as well as the simulation of the involved phenomena in a physically consistent way, providing an integrated view of the geologic history of the processes and elements of the petroleum system. The main objectives of this work are to show a reconstruction of the thermal and maturity evolution of the sedimentary section of the Reconcavo Basin using a multi-1D (pseudo 3D) approach, to model petroleum generation and expulsion, and the evolution of the pod(s) of source rock through time and space using the pseudo 3D approach, simulate petroleum migration along the main carrier-beds, accumulation and remigration from the potential traps. The advanced exploratory stage (mature), the geologic context (an intracratonic rift that resembles a close system) and the availability of large amounts of public data, make the Reconcavo Basin an excellent place to perform a study that can provide basis to an estimate of the remaining petroleum potential in analogous petroleum systems. (author)

  3. AMS-{sup 14}C measurements for the carbonate platform of the offshore Campos Basin, Rio de Janeiro State, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Coimbra, Melayne M. E-mail: melayne@onda.com.br; Barbosa, Catia F.; Soares-Gomes, Abilio; Silva, Cleverson G.; Rios-Netto, Aristoteles; Mueller, Ken A

    2000-10-01

    As part of our accelerator mass spectrometry (AMS) program in Brazil we prepared and measured some red algae carbonate crust samples from Campos Basin, Rio de Janeiro, Brazil. The measurements were performed at Purdue Rare Isotope Measurement Laboratory (PRIME Lab), Purdue University, IN, USA. This carbonate material is interlaminated with foraminiferal lime mud reflecting recurrent intervals of carbonate development, which might be linked to outer-shelf oceanographic circulation.

  4. Temporal evaluation of soil use conflicts in the Formoso river basin, state of Tocantins, Brazil

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    Kaio Cesar Cardoso de Lima Fonseca Alves

    2015-09-01

    Full Text Available The importance of permanent preservation areas (PPA is mainly associated to their environmental role to maintain, preserve, and conserve water resources and ecosystems within a basin. The objective of this study was to delimitate and quantify the areas of PPA along watercourses as well as anthropized areas within PPAs boundaries, in the Formoso river basin, state of Tocantins, Brazil. PPAs area was delimited considering boundaries according to the Brazilian Forest Law. We sampled areas within the watercourses classified up to hierarchical Level 4. Watercourses handling draw, automatic delimitation of PPA, and visual classification of the soil use conflicts based on LANDSAT 5 TM of 1985, 1998 and 2011 were carried out on Geographical Information System ArcGIS. PPA of the watercourses sampled in this study represent 1.14% (24,491.35 ha of the drainage area of the Formoso river basin. For 1985, an area of about 3,616.48 ha was quantified, which is characterized by conflicts related to soil use. However, these conflict areas were reduced to 3,341.25 ha and 3,345.37 ha, respectively, for 1998 and 2011. Due to the intense agricultural land expansion observed in the basin in the last decades, the mentioned reductions in soil use conflicts between 1985 and 1998 and subsequent maintenance can be linked to changes on Brazilian environmental legislation.

  5. Taxonomic revision of the fossil pulmonate mollusks of Itaboraí Basin (Paleocene, Brazil

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    Rodrigo Brincalepe Salvador

    2013-01-01

    Full Text Available The limestones of Itaboraí Basin (Middle Paleocene, Rio de Janeiro, Brazil, harbor a rich fossil molluscan fauna consisting exclusively of pulmonate snails, both terrestrial and freshwater. An extensive taxonomic revision of this paleofauna is conducted here. A new genus, Cortana, is described as well as two new species, Eoborus fusiforme and Gastrocopta itaboraiensis. The revised classification is as follows: Austrodiscus lopesi (Charopidae; Biomphalaria itaboraiensis (Planorbidae; "Brachypodella" britoi (Urocoptidae; Brasilennea arethusae, Brasilennea guttula, Brasilennea minor (Cerionidae; Bulimulus fazendicus, Bulimulus trindadeae, Cortana carvalhoi, Cyclodontina coelhoi, Itaborahia lamegoi, Leiostracus ferreirai, Plagiodontes aff. dentatus (Orthalicidae; Cecilioides sommeri (Ferussaciidae; Eoborus rotundus, Eoborus sanctijosephi, Eoborus fusiforme (Strophocheilidae; Gastrocopta mezzalirai, Gastrocopta itaboraiensis (Gastrocoptidae; Temesa magalhaesi (Clausiliidae. The species Strobilopsis mauryae was considered a synonym of Brasilennea arethusae; Bulimulus sommeri a synonym of Itaborahia lamegoi; and Vorticifex fluminensis a synonym of Eoborus sanctijosephi. Itaboraí Basin has the most ancient records of the families Orthalicidae, Gastrocoptidae, Ferussaciidae and Strophocheilidae. Moreover, the basin's records of Charopidae, Clausiliidae, Cerionidae, and Urocoptidae are among the most ancient in the world and, among these, those of Cerionidae, Clausiliidae and Urocoptidae deserve special attention since they are greatly removed from these families' current distribution. Additionally, Itaboraí has the most ancient records for the genera Austrodiscus, Brachypodella, Bulimulus, Cecilioides, Cyclodontina, Eoborus, Gastrocopta, Leiostracus, Plagiodontes and Temesa. There are three endemic genera in the basin: Brasilennea, Cortana and Itaborahia. Further discussion on paleobiogeography and evolution of this paleofauna is also provided.

  6. Brasacanthus sphoeroides gen. n., sp. n. (Acanthocephala, Echinorhynchidae from a coastal marine fish of Paraná State, Brazil

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    Vernon E. Thatcher

    2001-12-01

    Full Text Available Brasacanthus sphoeroides gen. n.. sp. n. is described from the marine fish, Sphoeroides greeleyi (Steindachner, taken in Paranaguá Bay, Paraná State, Brazil. The new genus differs from Acanthocephalus Koelreuter, 1771, the nearest genus in the family Echinorhynchidae, by having very flat and variable lemnisci in both sexes and a uterine egg reservoir in the female. The species is characterized by its spherical body form and in having parallel or diagonal testes.

  7. Laccomimus xikrin sp. nov. and new records of other species of Laccomimus Toledo & Michat, 2015 (Coleoptera: Dytiscidae: Laccophilinae) from Brazil.

    Science.gov (United States)

    Braga, Rafael Benzi; Ferreira-Jr, Nelson

    2016-08-18

    The genus Laccomimus Toledo & Michat, 2015 was recently erected for small drop-shape Dytiscidae beetles commonly found in Tropical South America associated with lentic waters. In the present paper a new species, Laccomimus xikrin sp. nov., is described and illustrated. New records from Brazil are presented for Laccomimus alvarengi Toledo & Michat, 2015 from Amazonas state, L. bordoni Toledo & Michat, 2015 from São Paulo state and L. variegatus Toledo & Michat, 2015 from Pará state.

  8. Changes in precipitation extremes in Brazil (Paraná River Basin)

    Science.gov (United States)

    Zandonadi, Leandro; Acquaotta, Fiorella; Fratianni, Simona; Zavattini, João Afonso

    2016-02-01

    This research was aimed at addressing aspects related to variation in the amount of precipitation during the period from 1986 to 2011 in the Paraná River Hydrographical Basin, Brazil, for 32 meteorological stations using 11 climate indices created by the ETCCDI (Expert Team, ET, on Climate Change Detection and Indices, ETCCDI). The daily rainfall data were organized in spreadsheets, which were subjected to an intense quality control and an accurate historical research. For each pluviometric index, we have estimated the trends and the statistical significant of the slopes have been calculated. The results confirm that an increase in total precipitation in almost all analyzed stations was registered, and the extreme precipitations were the main contributors to such additions. In fact, the significant increase in total annual rainfall in north-central sector of the basin are related to higher rates of heavy rain, mainly above 95th percentile, as well as to the highest event of rainfall above 10 mm. Instead the northern part of the region, showed declining trends of extreme rainfall, caused mainly by the reduction in the rainfall occurrences over 95th percentile. In order to evaluate the impact that the increasing extreme rainfall may cause in large urban centers, we have investigated the data of two municipalities (Curitiba, PR and Goiânia, GO-Brazil), where the positive trend can cause inconvenience to the population (floods and inundations) suggesting, at least, the need of implementation of more effective urban planning for the future.

  9. The flora of Early Permian coal measures from the Parana Basin in Brazil: A review

    Energy Technology Data Exchange (ETDEWEB)

    Iannuzzi, Roberto [Centro de Investigacoes do Gondwana, Instituto de Geociencias, Universidade Federal do Rio Grande do Sul, Av. Bento Goncalves, 9500, Porto Alegre, RS, 91.509-900 (Brazil)

    2010-08-01

    This paper presents an updated overview integrating both previous and newly published data on the most important floras found associated with Early Permian coal seams in the Parana Basin, Brazil. These floras occur within the Rio Bonito Formation and correspond to the Gondwana ''Glossopteris Flora.'' For this review, five floras are selected, in ascending stratigraphic order: the ''Sao Joao do Triunfo,'' ''Figueira,'' ''Quiteria,'' ''Morro do Papaleo'' and ''Irapua Bed'' floras. They are the best-known floras of the basin in terms of taxonomic composition, paleoecology and environments of deposition. An early-mid Sakmarian to earliest Artinskian age is indicated for the Rio Bonito Formation based on absolute radiometric and relative biostratigraphic ages. Integration of available information about the selected floras allows evaluation of taphonomic and paleoecological factors to provide a more comprehensive understanding of the Early Permian floral record in the Parana Basin. The variation observed in both the taxonomic composition of individual floras and in the frequency of occurrence of different plant groups is due to the broad range of environmental/edaphic conditions that prevailed in the many different depositional settings represented in the Rio Bonito Formation. A more precise age determination obtained for the plant-bearing deposits permits the establishment of a more confident correlation between the Early Permian floral succession in the Parana Basin and other Early Permian floral successions in other basins. The Sakmarian global warming favored the appearance of pecopterid and sphenopterid ferns amongst the spore-producing plants, and the glossopterids amongst the pollen-producing plants. (author)

  10. Seismic Traveltime Tomography Applied to Data from Miranga Field, Reconcavo Basin, Brazil

    Science.gov (United States)

    Bassrei, A.; Rodrigues, V.

    2015-12-01

    The growing global demand for hydrocarbons has tested the limits of oil exploration and exploitation technologies. Within the seismic methods, tomography is an alternative for the high resolution characterization of reservoirs, enabling a more efficient recovery of new as well as mature fields. In this work, seismic traveltime tomography in the transmission mode was applied to real data from the Miranga Field, Reconcavo Basin, State of Bahia, Brazil. This basin represents a landmark of oil exploration in Brazil and has been intensively studied since the 1950s. Today, the Reconcavo Basin is still the principal oil producer in the State of Bahia, but there is a demand for new technologies, especially for mature fields, to improve hydrocarbon recovery. The objective is to estimate the two-dimensional velocity distribution in the region between the two wells. We have used linearized inversion through the Levenberg-Marquardt scheme. The input data in the system are the traveltimes between the sources and the receivers and the distances propagated by each ray connecting such sources and receivers. Both inputs are provided through acoustic forward modeling. The conjugate gradient algorithm with regularization through derivative matrices was used as an inverse procedure. The tomographic inversion is an ill-posed problem because the existence, uniqueness and stability conditions are not completely satisfied. The linear system is regularized by derivative matrices derived to minimize the instability. This regularization procedure has a crucially important parameter called regularization parameter lambda. For the selection of lambda we used L-curve and Theta-curve. The estimated tomograms were consistent with previous geological knowledge of the area and the P-wave velocity range was consistent. The results showed that traveltime tomography is feasible for the characterization of reservoirs with a high rate of vertical change, similar to the Miranga Field.

  11. Compensatory forestation for soil water retention in watersheds of Campos do Jordão municipality, SP, Brazil

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    Getulio Teixeira Batista

    2011-12-01

    Full Text Available Compensatory forestation is an important technique to estimate the necessary forest cover for compensating the water loss due to surface runoff within a watershed and, therefore, guiding forest recovery interventions. The objective of this study was to quantify the forest area needed to compensate water loss caused by surface runoff in Fojo Creek and Perdizes Creek basin areas in the municipality of Campos do Jordão, SP, Brazil. Estimates were based on the Compensatory Forestation Methodology for Retention of Rainwater in Small Watersheds, which takes into consideration the average total annual precipitation, land cover and land use, the water infiltration capacity of soil, and an international recommendation indicating that 20.55% of the water in the hydrological cycle should infiltrate into the soil. These two watersheds have a total area of 2,666.6 ha that account for 9.3% of the municipal area of Campos do Jordão. The main land use and land covers in this area are: 1,257.9 ha of forest, 434.4 ha of urban area, 432.5 ha of commercial forest plantation, 265.1 ha of highland prairies, 126.8 ha of pastureland, and 149.9 ha of other classes. Water infiltration rate field experiment estimated a high rate (298 mmh-1 in forested areas, 289 mmh-1 in areas covered by commercial plantation, 94 mmh-1 in highland prairies, and 63 mmh-1in pasturelands. Based on the 20.55% infiltration recommendation of precipitated water, it was estimated that the total forest area required for these two watersheds to compensate for the runoff caused by the other land cover classes (prairies, pasture lands, reforestation plantations and urban areas should be 1,318.1 ha (51,8%. Therefore, an additional 60.2 ha of recovered forest is needed to compensate for the loss of 1,096 million m³/year of water lost in theses watersheds.

  12. Verification of inflow into hydropower reservoirs using ensemble forecasts of the TIGGE database for large scale basins in Brazil

    NARCIS (Netherlands)

    Mainardi Fan, F.; Schwanenberg, D.; Collischonn, W.; Weerts, A.H.

    2015-01-01

    Study region This paper describes a major ensemble-forecasts verification effort for inflows of three large-scale river basins of Brazil: Upper São Francisco, Doce, and Tocantins Rivers. Study focus In experimental scenarios, inflow forecasts were generated forcing one hydrological model with quanti

  13. Complete Genome Sequence of Mayaro Virus Imported from the Amazon Basin to São Paulo State, Brazil.

    Science.gov (United States)

    Mota, Mânlio Tasso Oliveira; Vedovello, Danila; Estofolete, Cassia; Malossi, Camila Dantas; Araújo, João Pessoa; Nogueira, Maurício Lacerda

    2015-11-25

    Mayaro (MAYV) is a neglected arbovirus from the tropical Americas. Here, we report the complete genome of an MAYV isolate from a patient returning from the Amazon basin and complaining of arthralgia, high fever, and headache, who was attended at an emergency service of São José do Rio Preto, São Paulo state, Brazil.

  14. Biodiversity and community structure of zooplankton in the Sub-basin of Rio Poxim, Sergipe, Brazil

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    Eliane Maria de Souza Nogueira

    2011-08-01

    Full Text Available The zooplankton of aquatic environments is composed mostly of protozoans, rotifers, cladocerans and copepods, which play an important role in the food chain, transferring mass and energy from primary producers to higher trophic levels. This work was prepared with the objective of contributing to the knowledge of zooplankton biodiversity that occurs in the Sub-basin of Rio Poxim. Water samples were taken at monthly intervals at four sampling stations located along the sub-basin in the period August 2009 to July 2010. To obtain the zooplankton community, 100 L of water were filtered on nylon net with an aperture of 50 mm. Were identified 72 taxa distributed in the following taxonomic categories Rotifera, Protozoa, Porifera, Nematoda, Anellida, Cladocera, Copepoda, Ostracoda, Isopoda and Insecta. In terms of species richness, the phylum Rotifera followed by the Protoctista were the most relevant with forty and fifteen taxa, respectively. The most representative taxa in numerical terms were Arcella vulgaris, Notholca sp. Rotary sp. and nematodes. Regarding the community diversity index, the community was characterized as low diversity, but the taxa were distributed evenly in all monitoring points.

  15. Two new Bryconamericus: B. cinarucoense n. sp. and B. singularis n. sp. (Characiformes, Characidae from the Cinaruco River, Orinoco Basin, with keys to all Venezuelan species

    Directory of Open Access Journals (Sweden)

    Román-Valencia, C.

    2008-06-01

    Full Text Available Here we describe for the first time Bryconamericus cinarucoense n. sp. and Bryconamericus singularis n. sp., two new species of Characiformesfrom the Cinaruco River, Orinoco Basin in Venezuela. B. cinarucoense n. sp. is distinguished from all other species of the genus in having: upper jaw extending beyond lower, maxilla short with only one or two teeth, cartilaginous rhinosphenoid extending to anterior part of prevomer, pelvic bone with cartilage along anterior edge, lateral line pores in straight line. B. singularis n. sp. is distinguished from congeners by having top of head flat, dentary with six or seven small unicuspid teeth, a dark lateral band extending from posterior edge of humeral spot to midbase of caudal fin which widens behind dorsal-fin origin, and in having five supraneurals which lack cartilage on the upper and lower extremities. Keys to aid identification of all known Venezuela species are included. Bryconamericus motatanensis is placed in the synonymy of B. alpha. Previous reports of B. breviceps and B. heteresthes from Venezuela are misidentifications, and are here considered as either B. cinarucoense n. sp., or another as yet undescribed species.

  16. Estimation of Phosphorus Emissions in the Upper Iguazu Basin (brazil) Using GIS and the More Model

    Science.gov (United States)

    Acosta Porras, E. A.; Kishi, R. T.; Fuchs, S.; Hilgert, S.

    2016-06-01

    Pollution emissions into the drainage basin have direct impact on surface water quality. These emissions result from human activities that turn into pollution loads when they reach the water bodies, as point or diffuse sources. Their pollution potential depends on the characteristics and quantity of the transported materials. The estimation of pollution loads can assist decision-making in basin management. Knowledge about the potential pollution sources allows for a prioritization of pollution control policies to achieve the desired water quality. Consequently, it helps avoiding problems such as eutrophication of water bodies. The focus of the research described in this study is related to phosphorus emissions into river basins. The study area is the upper Iguazu basin that lies in the northeast region of the State of Paraná, Brazil, covering about 2,965 km2 and around 4 million inhabitants live concentrated on just 16% of its area. The MoRE (Modeling of Regionalized Emissions) model was used to estimate phosphorus emissions. MoRE is a model that uses empirical approaches to model processes in analytical units, capable of using spatially distributed parameters, covering both, emissions from point sources as well as non-point sources. In order to model the processes, the basin was divided into 152 analytical units with an average size of 20 km2. Available data was organized in a GIS environment. Using e.g. layers of precipitation, the Digital Terrain Model from a 1:10000 scale map as well as soils and land cover, which were derived from remote sensing imagery. Further data is used, such as point pollution discharges and statistical socio-economic data. The model shows that one of the main pollution sources in the upper Iguazu basin is the domestic sewage that enters the river as point source (effluents of treatment stations) and/or as diffuse pollution, caused by failures of sanitary sewer systems or clandestine sewer discharges, accounting for about 56% of the

  17. Variation of the anthropic vulnerability in Ribeirão das Pedras watershed in Campinas/SP - Brazil.

    Science.gov (United States)

    Damame, Desirée; Longo, Regina; Ribeiro, Admilson; Fengler, Felipe

    2015-04-01

    The human actions has caused over the years profound changes in environmental quality in urban ecosystems suffering losses in the quality of air, soil , water and vegetation also the quality of life of the population that inhabit these areas . The study area is characterized by being a highly urbanized watershed, with about 43 % of its area covered by buildings, houses , and commercial and industrial establishments . Called the Ribeirão das Pedras Basin, located in Campinas / SP - Brazil and is bounded by coordinates 22˚47'10 '' and 22˚52'20 '' S , and 47˚ 07'15 '' and 46˚ 02 ' 15' ' . Has an average temperature of 22.4 ° C and average annual rainfall of 1424.5 mm . It has an area of about 42 km² . This is located two universities and a large mall. It also demands a strong agriculture , which occupies about 30 % of the area . It has also been part of two major forest reserves of the municipality, the Forest Santa Geneva and the Forest of Quilombo , both added to other small fragments overlying only about 6% of the total basin area . Avalição to environmental quality , the analysis of the vulnerability of urban watershed becomes an important environmental management tool. The vulnerability can be defined by susceptibility to changes of environment in its initial state , a current tax status by human intervention , and is almost always associated with risk , and the intensity at which such projects in one place, person or structure. In this context , this study aimed to assess environmental vulnerability in an urban watershed coming under increasing human pressures , especially in recent years . For this analysis were prepared soil graphics, slope , elevation and land use and land cover for the years 2009 and 2014 , generating with these , comparative anthropic vulnerability maps of the past five years. Crafting vulnerability maps is a sensitivity in order to enable appropriate management of biotic systems. With the results can be seen that the variation of

  18. OSL dating results of post-Barreiras sediments in the Paraiba basin, Northeastern Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Tudela, Diego R.G.; Munita, Casimiro S., E-mail: drtudela@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil); Mittani, Juan C.R.; Tatumi, Sonia H., E-mail: tatumi@fatecsp.br [Faculdade de Tecnologia de Sao Paulo (FATEC-SP/CEETEPS), Laboratorio de Datacao e Luminescencia de Cristais, Sao Paulo, SP (Brazil); Rossetti, Dilce F., E-mail: rossetti@dsr.inpe.br [Instituto Nacional de Pesquisas Espaciais (INPE), Sao Jose dos Campos, SP (Brazil). Centro de Observacao da Terra, Divisao de Sensoriamento Remoto - DSR

    2011-07-01

    In the present study we show ages of 39 sediments samples of two sedimentary units (PB1 and PB2) collected from Paraiba Basin, northeastern Brazil, obtained by optically stimulated luminescence (OSL) making use of standardized growth curve (SGC) and applying single aliquot regenerative dose (SAR) protocol in 15 randomly selected samples to validate the equivalent Dose (D{sub e}). Environmental radiation dosimetry of the area was performed to evaluate the natural concentrations of {sup 238}U, {sup 232}Th and {sup 40}K and in this way annual dose rates of the locations were evaluated. The results showed natural radioisotopes concentrations between 0.542-4.879 ppm for U, 1.314-26.098 ppm for Th and 0.141-1.12% for K and annual dose rates between 439-4172{mu}Gy/yr. The ages ranged from 1.8-178.3 kyr were obtained, and they are in agreements with the geological considerations. (author)

  19. Strontium isotopic signature of groundwater from Adamantina aquifer, Bauru Basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Maldaner, Carlos [Centre for Applied Groundwater Research, University of Guelph, 50 Stone Rd, Guelph, ON, N1G 2W1 (Canada); Martins, Veridiana; Bertolo, Reginaldo; Hirata, Ricardo [Centro de Pesquisas de Aguas Subterraneas do Instituto de Geociencias da Universidade de Sao Paulo, Sao Paulo - SP (Brazil)

    2013-07-01

    Using {sup 87}Sr/{sup 86}Sr ratios and the geochemistry of groundwater we were able to identify different hydrochemical facies in the Adamantina aquifer, Bauru Basin (Brazil). Samples from shallow wells show Cl-NO{sub 3}-Ca-Mg water with low pH due to natural and anthropogenic recharge. The {sup 87}Sr/{sup 86}Sr ratios are greatest in the shallower parts of the aquifer (0.7134) and decrease with increasing well screen interval depth. The nitrate concentration gradually decreases with depth and aquifer pH increases, HCO{sub 3} predominates as the main anion, and the groundwater becomes saturated with respect to calcite, with average {sup 87}Sr/{sup 86}Sr ratios of 0.708694 at depth. (authors)

  20. Structural framework and Mesozoic Cenozoic evolution of Ponta Grossa Arch, Paraná Basin, southern Brazil

    Science.gov (United States)

    Strugale, Michael; Rostirolla, Sidnei Pires; Mancini, Fernando; Portela Filho, Carlos Vieira; Ferreira, Francisco José Fonseca; de Freitas, Rafael Corrêa

    2007-09-01

    The integration of structural analyses of outcrops, aerial photographs, satellite images, aeromagnetometric data, and digital terrain models can establish the structural framework and paleostress trends related to the evolution of Ponta Grossa Arch, one of the most important structures of the Paraná Basin in southern Brazil. In the study area, the central-northern region of Paraná State, Brazil, the arch crosses outcropping areas of the Pirambóia, Botucatu, and Serra Geral Formations (São Bento Group, Mesozoic). The Pirambóia and Botucatu Formations are composed of quartz sandstones and subordinated siltstones. The Serra Geral Formation comprises tholeiitic basalt lava flows and associated intrusive rocks. Descriptive and kinematic structural analyses reveal the imprint of two brittle deformation phases: D1, controlled by the activation of an extensional system of regional faults that represent a progressive deformation that generated discontinuous brittle structures and dike swarm emplacement along a NW-SE trend, and D2, which was controlled by a strike-slip (transtensional) deformation system, probably of Late Cretaceous-Tertiary age, responsible for important fault reactivation along dykes and deformation bands in sandstones.

  1. Pseudempleurosoma gibsoni n. sp., a new Ancyrocephalid Monogenean from Paralonchurus brasiliensis (Sciaenidae from off the Southeastern Coast of Brazil

    Directory of Open Access Journals (Sweden)

    Santos Cláudia P

    2001-01-01

    Full Text Available Pseudempleurosoma gibsoni n. sp. (Monogenea: Ancyrocephalidae is described from the oesophagus of Paralonchurus brasiliensis (Steindachner from off the coast of Brazil. The type-species of Pseudempleurosoma Yamaguti, 1965, P. carangis Yamaguti, 1965, is redescribed and the diagnosis of the genus is amended. Metadiplectanotrema Gerasev et al. 1987 is considered synonym of Pseudempleurosoma. This genus now contains four species, including P. carangis, P. caranxi Gerasev et al., 1987 n. comb., P. myripristi Gerasev et al., 1987 n. comb. and the one new species.

  2. Instrumental Neutron Activation Analysis- INAA: environmental studies in Das Velhas Basin, Minas Gerais, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Rabelo V, M.A.; Andrade Q, M.T. [Researcher of National Council for Scientific and Technological Development, CNPq, Center University of the East of Minas Gerais State, UNILESTE-MG (Brazil); Araujo M, R. [CDTN (Brazil); Albernaz A, I. [SCA- CNRS/USR/059, Lyon (France); Oliveira, A.H. de [Federal University of Minas Gerais State (Brazil)]. e-mail: marvv@cdtn.br

    2006-07-01

    The Instrumental Neutron Activation Analysis - INAA was applied to determine concentrations of several elements in unpolluted areas and in the mining and farming region of the Das Velhas Basin, Minas Gerais State, Brazil. INAA was applied using the TRIGA Mark I IPR - R1 reactor at the Nuclear Technology Development Center of the National Committee of Nuclear Energy (CDTN/CNEN), in Belo Horizonte city, Minas Gerais State. At 100 kW of potency the flux of neutrons is 6.6 10{sup 11} n.cm{sup -2}.s{sup -1}. The samples analyzed were: water; sediment; gravel of gold mine and forage. The obtained results for the Das Velhas Basin in water and sediment samples - mining companies region - show a high level ({mu}g/g) of contamination with the analyzed elements, mainly in the sediment samples. During the period of floods, in farming region hundreds of kilometers away, contamination is found in fish and forage, reaching and harming both people and animals that live in the marginal region. (Author)

  3. Fishing resources in the rio Cuiabá basin, Pantanal do Mato Grosso, Brazil

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    Lúcia. A. F. Mateus

    Full Text Available The rio Cuiabá is one of the most important tributaries of the upper rio Paraguay basin that form the Pantanal wetlands. The fishing resources of the rio Cuiabá basin were studied based on landing data obtained from the Fish Market of the city of Cuiabá, State of Mato grosso, Brazil. A description is given of the composition and origin of the 2000 and 2001 catch. The rio Cuiabá is the main source of fish for Cuiabá, although some fish sold locally comes from the rio Paraguay. The 2000-2001 catch consisted mainly of migratory species. The main landed species were the pimelodids pintado -Pseudoplatystoma corruscans, cachara -Pseudoplatystoma fasciatum, and jaú -Paulicea luetkeni, and the characiforms pacu -Piaractus mesopotamicus, piraputanga -Brycon microlepis, piavuçu -Leporinus macrocephalus, and dourado -Salminus brasiliensis. Large catfishes (Pimelodidae represented 70% of the landed fish, among which pintado was the most abundant. The data indicate that current catches are smaller than those recorded in the early 1980s and fish are caught far off the urban zone. Moreover, although the number and composition of species caught were similar to those of the 80s, the distribution of species abundance has changed. Currently, fisheries catch more carnivorous species than fish from lower trophic levels. These findings cannot be credited solely to overfishing, but appear to result from a complex interaction of factors, i.e., environmental degradation, changes in market preferences, and restrictive legal fishing regulations.

  4. The microbial nature of laminated limestones: Lessons from the Upper Aptian, Araripe Basin, Brazil

    Science.gov (United States)

    Catto, Bruno; Jahnert, Ricardo Jorge; Warren, Lucas Verissimo; Varejao, Filipe Giovanini; Assine, Mario Luis

    2016-07-01

    The Araripe Basin, located in northeastern Brazil, originated during the Gondwana continental break-up responsible for the opening of the South Atlantic during the Early Cretaceous. In the Araripe Basin, the post-rift Aptian sequence corresponds to the Santana Group, which is composed, in upward succession, of mostly clastic continental and rare carbonate layers of the Barbalha, Crato, Ipubi and Romualdo Formations. The laminated limestones of the Crato Formation were deposited in a lacustrine environment preceding the deposition of the Ipubi Formation evaporites. They are age-equivalent to the limestones of the pre-salt interval of the east coast of Brazil, which contains large petroleum reserves. The excellent preservation of its macrofossils has made the Crato Formation known worldwide as a Fossil Lagerstätte. The limestones are macroscopically homogeneous, and their deposition has been previously attributed to chemical precipitation. Although the carbonate laminites are macroscopically undifferentiated, mineralogical variations, microscopic texture and distinctive biotic aspects supported the characterization of four microfacies: planar laminated, crustiform, nodular and rhythmic. The microfacies analysis indicated a strong and pervasive biological activity in the Crato limestone morphogenesis. Organominerals precipitated by the metabolic action of cyanobacteria and/or sulfate-reducing bacteria and methanogenic-oxidizing archea are represented by calcite and pyrite. Calcified coccoid and filaments are common, furthermore, the presence of calcified biofilms composed of exopolymeric substances (EPS) is ubiquitous. The presence of amorphous organic matter (AOM) and gypsum, particularly in the rhythmic microfacies, indicates anoxic/dysoxic conditions and stressful environments during periods of drought and low lake levels which favored the development and preservation of microbial biofilms. Phytoclasts and miospores when present in the succession indicate an

  5. Host-parasite interactions between the piranha Pygocentrus nattereri (Characiformes: Characidae and isopods and branchiurans (Crustacea in the rio Araguaia basin, Brazil

    Directory of Open Access Journals (Sweden)

    Lucélia Nobre Carvalho

    Full Text Available In the tropics, studies on the ecology of host-parasite interactions are incipient and generally related to taxonomic aspects. The main objective of the present work was to analyze ecological aspects and identify the metazoan fauna of ectoparasites that infest the piranha, Pygocentrus nattereri. In May 2002, field samples were collected in the rio Araguaia basin, State of Goiás (Brazil. A total of 252 individuals of P. nattereri were caught with fishhooks and 32.14% were infested with ectoparasite crustaceans. The recorded ectoparasites were branchiurans, Argulus sp. and Dolops carvalhoi and the isopods Braga patagonica, Anphira branchialis and Asotana sp. The prevalence and mean intensity of branchiurans (16.6% and 1.5, respectively and isopods (15.5% and 1.0, respectively were similar. Isopods were observed in the gills of the host; branchiurans were more frequent where the skin was thinner, and facilitated attachment and feeding. The ventral area, the base of the pectoral fin and the gular area were the most infested areas. The correlations between the standard length of the host and the variables intensity and prevalence of crustaceans parasitism, were significant only for branchiurans (rs = 0.2397, p = 0.0001; chi2 = 7.97; C = 0.19. These results suggest that both feeding sites and body size probably play an important role in the distribution and abundance of ectoparasites.

  6. Uncertainty in climate change impacts on water resources in the Rio Grande Basin, Brazil

    Directory of Open Access Journals (Sweden)

    M. T. Nóbrega

    2011-02-01

    Full Text Available We quantify uncertainty in the impacts of climate change on the discharge of Rio Grande, a major tributary of the Paraná River in South America and one of the most important basins in Brazil for water supply and hydro-electric power generation. We consider uncertainty in climate projections associated with the greenhouse-gas emission scenarios (A1b, A2, B1, B2 and increases in global mean air temperature of 1 to 6° C for the HadCM3 GCM (Global Circulation Model as well as uncertainties related to GCM structure. For the latter, multimodel runs using 6 GCMs (CCCMA CGCM31, CSIRO Mk30, IPSL CM4, MPI ECHAM5, NCAR CCSM30, UKMO HadGEM1 and HadCM3 as baseline, for a +2° C increase in global mean temperature. Pattern-scaled GCM-outputs are applied to a large-scale hydrological model (MGB-IPH of Rio Grande Basin. Based on simulations using HadCM3, mean annual river discharge increases, relative to the baseline or control run period (1961–1990, by +5% to +10% under the SRES emissions scenarios and from +8% to +51% with prescribed increases in global mean air temperature of between 1 and 6° C. Substantial uncertainty in projected changes to mean river discharge (−28% to +13% under the 2° C warming scenario is, however, associated with the choice of GCM. We conclude that, in the case of Rio Grande Basin, the most important source of uncertainty derives from the GCM rather than the emission scenario or the magnitude of rise in mean global temperature.

  7. Uncertainty in climate change impacts on water resources in the Rio Grande Basin, Brazil

    Directory of Open Access Journals (Sweden)

    M. T. Nóbrega

    2010-08-01

    Full Text Available We quantify uncertainty in the impacts of climate change on the discharge of the Rio Grande, a major tributary of the River Paraná in South America and one of the most important basins in Brazil for water supply and hydro-electric power generation. We consider uncertainty in climate projections associated with the SRES (greenhouse-gas emission scenarios (A1b, A2, B1, B2 and increases in global mean air temperature of 1 to 6 °C for the HadCM3 GCM as well as uncertainties related to GCM structure. For the latter, multimodel runs using 6 GCMs (CCCMA CGCM31, CSIRO Mk30, IPSL CM4, MPI ECHAM5, NCAR CCSM30, UKMO HadGEM1 and HadCM3 as baseline, for a + 2 °C increase in global mean temperature. Pattern-scaled GCM-outputs are applied to a large-scale hydrological model (MGB-IPH of the Rio Grande Basin. Based on simulations using HadCM3, mean annual river discharge increases, relative to the baseline period (1961–1990, by + 5% to + 10% under the SRES emissions scenarios and from + 8% to + 51% with prescribed increases in global mean air temperature of between 1 and 6 °C. Substantial uncertainty in projected changes to mean river discharge (− 28% to + 13% under the 2 °C warming scenario is, however, associated with the choice of GCM. We conclude that, in the case of the Rio Grande Basin, the most important source of uncertainty derives from the GCM rather than the emission scenario or the magnitude of rise in mean global temperature.

  8. Tmesiphantes hypogeus sp. nov. (Araneae, Theraphosidae, the first troglobitic tarantula from Brazil

    Directory of Open Access Journals (Sweden)

    Rogério Bertani

    2013-03-01

    Full Text Available A new species of Tmesiphantes Simon, 1892, is described from sandstone/quartizitic caves of Chapada Diamantina, Bahia State, Brazil. This is the fifth species of the genus and the first record of a troglobitic mygalomorph in Brazil. A key is presented for all Tmesiphantes species.

  9. Capoeta damascina (Valenciennes, 1842), a new host of Contracaecum sp. and Capillaria sp. (Nematoda) from the Kor River Basin, southwestern Iran

    Institute of Scientific and Technical Information of China (English)

    Zeinab Gholami; Mohammad Taghi Rahimi; Eshrat Beigom Kia; Hamid Reza Esmaeili; Iraj Mobedi

    2014-01-01

    Objective: To investigate the parasitic infection status of cyprinid fish, Capoeta damascina in Gomban spring-stream, Kor River Basin, Fars Province, southwestern Iran.Methods:stream, Kor River Basin, Fars Province, southwestern Iran. The collected fish were dissected carefully and their internal organs such as liver, gonad, muscle, abdominal lobes, whole viscera and digestive tract were surveyed parasitologically.Results:One female cyprinid fish out of 12 fish was infected with three nematodes. Two A total of 12 cyprinid fish (7 females and 5 males) were collected from Gomban spring-nematodes (larvae) were identified as Contracaecum sp. which were attached firmly to the outer part of intestine and another adult helminth was recognized as Capillaria sp. which was recovered from digestive content.Conclusions:This study is the first record indicating that cyprinid fish acts as a new host for recovered nematodes. Further helminthological investigations are highly recommended in different parts of Iran in order to expand our knowledge about helmintic parasites of cyprinid fish and their role in transmission of diseases to human and animal.

  10. Well successfully drilled with high performance water-based fluid: Santos Basins, offshore Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Fornasier, Frank C.; Luzardo, Juan P. [Halliburton Company, Houston, TX (United States); Bishnoi, M.L. [Oil and Natural Gas Corporation Ltda. (ONGC), Dehradun (India)

    2012-07-01

    Santos Basin is a 352,260 square kilometers (136,010 sq mi) offshore pre-salt basin. It is located in the South Atlantic Ocean, some 300 kilometers (190 mi) South East of Sao Paulo, Brazil. One of the largest Brazilian sedimentary basins, it is the site of several recent significant oil fields, including Tupi and Jupiter. The criteria for drilling fluid selection is based upon the following factors: maximum cost efficiency, environmental friendliness, optimum borehole stability, and ease of use. The recommended drilling fluid formulation takes into consideration the experience gained during the drilling of wells in the Santos Basin area. The operator wanted to use a high-performance water-based fluid (HPWBF) that could provide shale inhibition, wellbore stability, lubricity and improved rate of penetration (ROP) as an alternative to synthetic-based drilling fluids to present value in terms of economics and environmental friendliness. The HPWBF consists of three synergistic products: a hydration suppressant, a dispersion suppressant, and an accretion suppressant. The system is formulated based on customized solutions for managing the clay reactivity. High logistics costs require drilling fluids that can be prepared with sea water and discharged to the sea without environmental impact. The HPWBF is a clay-free system designed for maximum shale inhibition in highly reactive formations. The system can provide wellbore stability, high rates of penetration, and acceptable rheological properties over a wide range of temperatures, with the added benefit of allowing cuttings discharge based upon water base environmental restrictions. Since no oil is used in the formulation, the HPWBF eliminates the need for cuttings processing and monitoring equipment, and exceeds the environmental requirements by achieving an LC50 value of 345,478.22 ppm in comparison with the minimum requirement (LC50 > 30,000 ppm in 96 hr), permitting use and discharge to the sea. The HPWBF selected

  11. Sapromyza lopesi sp. n. from Brazil: a species related to S. duodecimvittata (Frey, 1919 (Diptera: Lauxaniidae

    Directory of Open Access Journals (Sweden)

    G. E. Shewell

    1989-01-01

    Full Text Available A new species, Sapromyza lopesi, is described from Brazil, and compared with its closest relative, S. duodecimvittata (Frey. Some remarks are made on the generic classification of South American Lauxaniidae as it affects these and other species.

  12. Ensemble Streamflow Predictions in the Três Marias Basin, Brazil

    Science.gov (United States)

    Mainardi Fan, Fernando; Schwanenberg, Dirk; Kuwajima, Julio; Assis dos Reis, Alberto; Collischonn, Walter

    2014-05-01

    Hydropower is the main electricity source of Brazil. The related hydropower reservoirs are multi-purpose thus besides efficient and reliable energy production, they are relevant for flood control. In this context, the present study shows results of an Ensemble Streamflow Prediction (ESP) for supporting the operational decision making implemented at Três Marias hydroelectric power project located in the São Francisco River basin in Brazil. It is a large tropical river basin with approximately 55,000km² up to the Três Marias dam. The hydrological model used in the study is the MGB-IPH (Modelo de Grandes Bacias from Instituto de Pesquisas Hidráulicas), a large scale distributed hydrological model. Applied in an operational forecasting mode, it uses an empirical data assimilation method to take into account real time streamflow observations to update its state variables. We present results of a hindcast experiment with observed precipitation and streamflow data from the local energy utility, CEMIG (Companhia Energética de Minas Gerais), and from the Brazilian water agency, ANA (Agencia Nacional de Água),. Probabilistic Numerical Weather Predictions (NWP) from CPTEC (Centro de Previsão de Tempo e Estudos Climáticos), ECMWF (European Centre for Medium-Range Weather Forecast) and NOAA (National Oceanic and Atmospheric Administration) are used to generate the ESP. The data products and the MGB-IPH model are integrated into an open shell forecasting platform based on the software package Delft-FEWS. Inside the forecasting platform a hindcast mode over a forecast lead time of 10-16 days in recent rainfall periods is applied in. The ESP results are compared to deterministic forecasts of the Três Marias reservoir inflow. The results assessment verifies the added value of the ESP in general in comparison to the use of deterministic forecasts by means of different performance indicators. The ESP derived from the ECMWP ensemble shows the best performance. A future

  13. Deciphering the depositional environment of the laminated Crato fossil beds (Early Cretaceous, Araripe Basin, North-eastern Brazil)

    DEFF Research Database (Denmark)

    Heimhofer, Ulrich; Ariztegui, Daniel; Lenniger, Marc

    2010-01-01

    The laminated limestones of the Early Cretaceous Crato Formation of the Araripe Basin (North-eastern Brazil) are world-famous for their exceptionally well-preserved and taxonomically diverse fossil fauna and flora. Whereas the fossil biota has received considerable attention, only a few studies...... bedded, pale to dark lamination. To obtain information on palaeoenvironmental conditions, sample slabs derived from three local stratigraphic sections within the Araripe Basin were studied using high-resolution multiproxy techniques including detailed logging, petrography, mu-XRF scanning and stable......-poor meteoric water source and support a continental freshwater setting for the Nova Olinda Member. The delta C-13 values, which are comparatively rich in C-13 (between -0.1 and +1.9 parts per thousand), are interpreted to reflect reduced throughflow of water in a restricted basin, promoting...

  14. The Alegre Lineament and its role over the tectonic evolution of the Campos Basin and adjacent continental margin, Southeastern Brazil

    Science.gov (United States)

    Calegari, Salomão Silva; Neves, Mirna Aparecida; Guadagnin, Felipe; França, George Sand; Vincentelli, Maria Gabriela Castillo

    2016-08-01

    The structural framework and tectonic evolution of the sedimentary basins along the eastern margin of the South American continent are closely associated with the tectonic framework and crustal heterogeneities inherited from the Precambrian basement. However, the role of NW-SE and NNW-SSE structures observed at the outcropping basement in Southeastern Brazil and its impact over the development of those basins have not been closely investigated. In the continental region adjacent to the Campos Basin, we described a geological feature with NNW-SSE orientation, named in this paper as the Alegre Fracture Zone (AFZ), which is observed in the onshore basement and can be projected to the offshore basin. The main goal of this work was to study this structural lineament and its influence on the tectonic evolution of the central portion of the Campos Basin and adjacent mainland. The onshore area was investigated through remote sensing data joint with field observations, and the offshore area was studied through the interpretation of 2-D seismic data calibrated by geophysical well logs. We concluded that the AFZ occurs in both onshore and offshore as a brittle deformation zone formed by multiple sets of fractures that originated in the Cambrian and were reactivated mainly as normal faults during the rift phase and in the Cenozoic. In the Campos Basin, the AFZ delimitates the western side of the Corvina-Parati Low, composing a complex fault system with the NE-SW faults and the NW-SE transfer faults.

  15. Palynostratigraphy and sedimentary facies of Middle Miocene fluvial deposits of the Amazonas Basin, Brazil

    Science.gov (United States)

    Dino, Rodolfo; Soares, Emílio Alberto Amaral; Antonioli, Luzia; Riccomini, Claudio; Nogueira, Afonso César Rodrigues

    2012-03-01

    Palynostratigraphic and sedimentary facies analyses were made on sedimentary deposits from the left bank of the Solimões River, southwest of Manaus, State of Amazonas, Brazil. These provided the age-dating and subdivision of a post-Cretaceous stratigraphic succession in the Amazonas Basin. The Novo Remanso Formation is subdivided into upper and lower units, and delineated by discontinuous surfaces at its top and bottom. The formation consists primarily of sandstones and minor mudstones and conglomerates, reflecting fluvial channel, point bar and floodplain facies of a fluvial meandering paleosystem. Fairly well-preserved palynoflora was recovered from four palynologically productive samples collected in a local irregular concentration of gray clay deposits, rich in organic material and fossilized wood, at the top of the Novo Remanso Formation upper unit. The palynoflora is dominated by terrestrial spores and pollen grains, and is characterized by abundant angiosperm pollen grains ( Tricolpites, Grimsdalea, Perisyncolporites, Tricolporites and Malvacearumpollis). Trilete spores are almost as abundant as the angiosperm pollen, and are represented mainly by the genera Deltoidospora, Verrutriletes, and Hamulatisporis. Gymnosperm pollen is scarce. The presence of the index species Grimsdalea magnaclavata Germeraad et al. (1968) indicates that these deposits belong to the Middle Miocene homonymous palynozone (Lorente, 1986; Hoorn, 1993; Jaramillo et al., 2011). Sedimentological characteristics (poorly sorted, angular to sub-angular, fine to very-coarse quartz sands facies) are typical of the Novo Remanso Formation upper part. These are associated with a paleoflow to the NE-E and SE-E, and with an entirely lowland-derived palinofloristic content with no Andean ferns and gymnosperms representatives. All together, this suggests a cratonic origin for this Middle Miocene fluvial paleosystem, which was probably born in the Purus Arch eastern flank and areas surrounding the

  16. Complex intrasalt deformation in the Santos Basin, offshore Brazil: the role of density inversion

    Science.gov (United States)

    Dooley, Tim; Jackson, Chris; Jackson, Martin; Hudec, Mike; Rodriguez, Clara

    2016-04-01

    Understanding intrasalt structure may elucidate the fundamental kinematics and, ultimately, the mechanics of diapir growth. However, there have been relatively few studies of the internal structure of salt diapirs outside the mining industry because their cores are only partly exposed in the field and poorly imaged in seismic reflection data. 3D seismic reflection from the Santos Basin, offshore Brazil reveal enigmatic allochthonous salt sheets of older evaporites emplaced above an overlying stratified evaporite sequence. Seismic-stratigraphic observations form the basis for a kinematic model invoking: (i) initial inward flow and thickening of the lower mobile salt within the rising wall, and arching of stratified overburden; (ii) breaching of the overburden, ascent of mobile lower evaporites along single or multiple feeders, and emplacement of upper-wall sheets or canopies; and (iii) later diapir squeezing due to regional shortening. We designed and ran physical models to explain how and why these structures occur, and to provide a mechanical basis for our kinematic model. Our first two models simulated salt having uniform internal density, with walls growing by (i) initially symmetric differential loading; and (ii) initially symmetric differential loading plus shortening. These models reproduced anticlines and injection folds seen in the simpler deformed walls in the Santos Basin. However, neither model reproduced the most complex structures (e.g. allochthonous intrusions, steep feeders, recumbent synclines) seen within the Santos evaporites. Thus, we argue differential loading and shortening alone are insufficient to generate these complex structures. In our third model, a less-dense lower evaporite was overlain by denser upper evaporites, similar to the density structure found in Santos Basin wellbores. In this model the wall rose solely by differential loading, with the lower mobile unit breaching the overlying stratified evaporites to form vertical diapirs

  17. Geoelectrical characterization by joint inversion of VES/TEM in Paraná basin, Brazil

    Science.gov (United States)

    Bortolozo, C. A.; Couto, M. A.; Almeida, E. R.; Porsani, J. L.; Santos, F. M.

    2012-12-01

    For many years electrical (DC) and transient electromagnetic (TEM) soundings have been used in a great number of environmental, hydrological and mining exploration studies. The data of both methods are interpreted usually by individual 1D models resulting in many cases in ambiguous models. This can be explained by how the two different methodologies sample the subsurface. The vertical electrical sounding (VES) is good on marking very resistive structures, while the transient electromagnetic sounding (TEM) is very sensitive to map conductive structures. Another characteristic is that VES is more sensitive to shallow structures, while TEM soundings can reach deeper structures. A Matlab program for joint inversion of VES and TEM soundings, by using CRS algorithm was developed aiming explore the best of the both methods. Initially, the algorithm was tested with synthetic data and after it was used to invert experimental data from Paraná sedimentary basin. We present the results of a re-interpretation of 46 VES/TEM soundings data set acquired in Bebedouro region in São Paulo State - Brazil. The previous interpretation was based in geoelectrical models obtained by single inversion of the VES and TEM soundings. In this work we present the results with single inversion of VES and TEM sounding inverted by the Curupira Program and a new interpretation based in the joint inversion of both methodologies. The goal is increase the accuracy in determining the underground structures. As a result a new geoelectrical model of the region is obtained.

  18. Sedimentation rates in Atibaia River basin, Sao Paulo State, Brazil, using {sup 210}Pb as geochronometer

    Energy Technology Data Exchange (ETDEWEB)

    Sabaris, T.P.P. [Departamento de Petrologia e Metalogenia, Universidade Estadual Paulista (UNESP), Av. 24-A, No. 1515, C.P. 178, CEP 13506-900, Rio Claro, Sao Paulo (Brazil); Bonotto, D.M., E-mail: danielbonotto@yahoo.com.b [Departamento de Petrologia e Metalogenia, Universidade Estadual Paulista (UNESP), Av. 24-A, No. 1515, C.P. 178, CEP 13506-900, Rio Claro, Sao Paulo (Brazil)

    2011-01-15

    The constant initial concentration (CIC) of unsupported/excess {sup 210}Pb model was successfully used to assess {sup 210}Pb data of nine sediment cores from Atibaia River basin, Sao Paulo State, Brazil. The {sup 210}Pb-based apparent sediment mass accumulation rates ranged from 47.7 to 782.4 mg/cm{sup 2} yr, whereas the average linear sedimentation rates between 0.16 and 1.32 cm/yr, which are compatible with the calculated sediment mass fluxes, i.e. a higher sediment mass accumulation rate yielded a higher linear sedimentation rate. The higher long-term based accumulation rate tended to be found in topographically softer regions. This occurs because the sediments are preferentially transported in topographically steeper regions instead of being deposited. Anthropic activities like deforestation possibly interfered with the natural/normal sedimentation processes, which increased in accordance with modifications on the channel drainage. The radionuclide geochronology as described in this paper allows determination of sedimentation rates that are compatible with values estimated elsewhere. The adoption of an appropriate factor generated from previous laboratory experiments resulted in a successful correction for the {sup 222}Rn-loss from the sediments, bringing the estimate of the parent-supported (in-situ produced) {sup 210}Pb to reliable values required by the CIC model.

  19. Depositional, diagenetic and stratigraphic aspects of microfacies from Riachuelo Formation, Albian, Sergipe Basin, Brazil

    Directory of Open Access Journals (Sweden)

    Caio Vinícius Gabrig Turbay

    2013-12-01

    Full Text Available The rocks of the Riachuelo Formation, Sergipe Basin, Brazil, represent an example of carbonate sedimentation related to the drift phase during the opening of the South Atlantic Ocean. The Carapeba and Brejo quarries exhibit the best onshore outcrops of the drift carbonate section along the Brazilian continental edge. Field studies and microfacies analysis of the outcropped sedimentary section showed six sedimentary deposits related to the physiography of a carbonate shelf. Proximal mixed deposits are represented by the rich-terrigenous dolostone. Levels with alternate layers of fine grained sandstones and siltstones are here related to distal facies of submarine fans deposits. Mudstones with miliolids and textularids represent a lagoonal environment in a semi-restricted middle shelf. Packstones, grainstones and occasionally wackestones with oncoids, intraclasts and peloids represent sedimentary deposits related to the back of shallow sandy bars and environments at the interface with the lagoon. Grainstones whit ooliths, oncoids, intraclasts and bioclasts, with trough cross-bedding, represent a shallower shoreface environment over the shallow carbonate back on outer shelf. Cements and other post- depositional features suggest four different diagenetic environments: a marine phreatic diagenetic environment with active water circulation; b marine phreatic diagenetic environment with stagnant water; c freshwater phreatic diagenetic environment; d burial diagenetic environment. The sedimentary succession is formed by shallowing upward cycles overlain by a possible transgressive surface, which may indicate the passage of a lowstand to a transgressive system tract.

  20. A fossil loricariid catfish (Siluriformes: Loricarioidea from the Taubaté Basin, eastern Brazil

    Directory of Open Access Journals (Sweden)

    Maria Claudia Malabarba

    Full Text Available A new loricariid catfish is described from the Tremembé Formation (Late Oligocene to Early Miocene sediments of the Taubaté Basin in eastern São Paulo State, Brazil. Taubateia paraiba, new genus and species, is based on a single specimen preserved as a ventral-side impression of an articulated partial neurocranium, dorsal elements of the pectoral girdle and anterior vertebrae. The fossil is identified as belonging to family Loricariidae based on obvious overall similarity and the presence of diagnostic derived characters such as: odontodes, dorsal margin of metapterygoid contacting lateral ethmoid, presence of mesethmoid disk (condyle, and compound pterotic-supracleithrum bone. Also, as in most loricariids, the ossified transcapular (Baudelot's ligament plus basiocciptal lateral process form a prominent transverse wall at the occiput. Other derived characters preserved in Taubateia are synapomorphies at different levels within Loricariidae, including a wide and low parasphenoid, form of pterotic-supracleithrum, shape and position of the mesethmoid disk, a triangular lateral ethmoid with expanded posterolateral corner and a rounded and low ridge articulating with the metapterygoid, and a pointed distal margin of transverse process of the Weberian compound centrum. The derived characters recognized in this fossil are a distinctive combination for diagnosing a new genus and species but not for its unambiguous placements in any of the currently recognized loricariid subfamilies.

  1. Contribution to the stratigraphy of the onshore Paraíba Basin, Brazil

    Directory of Open Access Journals (Sweden)

    Dilce F. Rossetti

    2012-06-01

    Full Text Available Several publications have contributed to improve the stratigraphy of the Paraíba Basin in northeastern Brazil. However, the characterization and distribution of sedimentary units in onshore areas of this basin are still incomplete, despite their significance for reconstructing the tectono-sedimentary evolution of the South American passive margin. This work provides new information to differentiate among lithologically similar strata, otherwise entirely unrelated in time. This approach included morphological, sedimentological and stratigraphic descriptions based on surface and sub-surface data integrated with remote sensing, optically stimulated luminescence dating, U+Th/He dating of weathered goethite, and heavy mineral analysis. Based on this study, it was possible to show that Cretaceous units are constrained to the eastern part of the onshore Paraíba Basin. Except for a few outcrops of carbonatic rocks nearby the modern coastline, deposits of this age are not exposed to the surface in the study area. Instead, the sedimentary cover throughout the basin is constituted by mineralogically and chronologically distinctive deposits, inserted in the Barreiras Formation and mostly in the Post-Barreiras Sediments, of early/middle Miocene and Late Pleistocene-Holocene ages, respectively. The data presented in this work support tectonic deformation as a factor of great relevance to the distribution of the sedimentary units of the Paraíba Basin.Várias publicações têm contribuído para melhorar a estratigrafia da Bacia Paraíba no nordeste do Brasil. Entretanto, a caracterização e distribuição das unidades sedimentares em áreas continentais desta bacia são ainda incompletas, apesar de sua importância para reconstruir a evolução tectono-sedimentar da margem passiva sulamericana. Este trabalho fornece novas informações para diferenciar entre estratos litologicamente similares que, por outro lado, não são relacionados no tempo. Esta

  2. Genetic identification of Rickettsia sp. strain Atlantic rainforest in an endemic area of a mild spotted fever in Rio Grande do Sul state, Southern Brazil.

    Science.gov (United States)

    Figueiredo Voizzoni, Vinicius; Barbosa Silva, Arannadia; Medeiros Cardoso, Karen; Barbosa Dos Santos, Fernanda; Stenzel, Barbara; Amorim, Marinete; Vilges de Oliveira, Stefan; Salles Gazeta, Gilberto

    2016-10-01

    Rickettsia sp. strain Atlantic rainforest causes a less severe rickettsiosis, with two cases confirmed until now. The tick species Amblyomma ovale is appointed as the main vector of this bacterium. The southern region of Brazil has reported patients with spotted fever who have milder symptoms. In 2013, during an investigation of rickettsiosis cases, an A. ovale tick was found attached to a man in an area where there were two cases. The parasite was processed for molecular analysis and the rickettsial infection was confirmed based on phylogenetic analysis of genes ompA, ompB and geneD (sca4). In the present study the human pathogenic Rickettsia sp. strain Atlantic rainforest was identified in the state of Rio Grande do Sul, Southern Brazil. Since A. ovale, its main vector, is found frequently parasitizing dogs, animals that can cross international borders freely in southern Brazil, this bacteria can bring major concerns in terms of public health.

  3. Ginkgoites myrioneurus sp nov and associated shoots from the Lower Cretaceous of the Jixi Basin, Heilongjiang, China

    Energy Technology Data Exchange (ETDEWEB)

    Yang, X.J. [Chinese Academy of Science, Nanjing (China). Nanjing Institute of Geology & Palaeontology

    2004-10-01

    Ginkgoalean leaves attributed to Ginkgoites myrioneurus sp. nov. and associated long and dwarf shoots were collected from the Lower Cretaceous coal-bearing Muling Formation of the Jixi Basin, eastern Heilongjiang, China. The common characteristic feature of the various leaves is the dense venation. The species may be distinguished from other known species of Ginkgoites from the Jurassic and Lower Cretaceous of eastern Asia in having 8-18 closely arranged oblanceolate segments each with 6-16 veins. The fragmentary long and dwarf shoots are similar to those of extant Ginkgo biloba in gross morphology. They are considered to belong to the same tree as that which produced Ginkgoites myrioneurus.

  4. First report of Lecanodiaspis dendrobii Douglas, 1892 (Hemiptera: Lecanodiaspididae and the associated parasitoid Cephaleta sp. (Hymenoptera: Pteromalidae in Brazil

    Directory of Open Access Journals (Sweden)

    A. L. Marsaro Júnior

    Full Text Available Abstract Lecanodiaspis dendrobii Douglas, 1892 (Hemiptera: Coccoidea: Lecanodiaspididae and the associated parasitoid Cephaleta sp. (Hymenoptera: Pteromalidae are reported for the first time in Brazil. Specimens of this scale insect were collected on branches and stems of Acacia mangium Willd., Leucaena leucocephala (Lam. de Wit (Fabaceae, Morus nigra L. (Moraceae, Citrus reticulata Blanco (Rutaceae, Tectona grandis L. f. (Verbenaceae, Anacardium occidentale (Anacardiaceae, Annona squamosa L. and Xylopia aromatica (Lam. Mart. (Annonaceae, in three municipalities of the Roraima state. All plants here mentioned are recorded for the first time as a host for L. dendrobii. Morphological characters of L. dendrobii and symptoms presented by the host plants infested by this pest are included in this work.

  5. Theileria electrophorin.sp., a parasite of the electric eel Electrophorus electricus (Osteichthyes: Cypriniformes: Gymnotidae from Amazonian Brazil

    Directory of Open Access Journals (Sweden)

    Ralph Lainson

    2007-03-01

    Full Text Available The name Theileria electrophori n.sp. is proposed for a small parasite described in the erythrocytes of the electric eel, Electrophorus electricus, from Amazonian Brazil. Division of the organism in the erythrocyte produces only four bacilliform daughter cells which become scattered in the host cell, without a cruciform or rosette-shaped disposition. Exoerythrocytic meronts producing a large number of merozoites were encountered in Giemsa-stained impression smears of the internal organs, principally in the liver, and are presumably the source of the intraerythrocytic forms of the parasite. This developmental pattern is characteristic of piroplasms within the family Theileriidae, where the author considers the parasite of E. electricus to most appropriately belong. It effectively distinguishes the organism from the dactylosomatid parasites Babesiosoma Jakowska and Nigrelli, 1956 and Dactylosoma Labbé, 1894 also found in fishes. This appears to be the second report of Theileria Bettencourt, Franca and Borges, 1907 in a fish.

  6. Amphimerus bragai N. Sp. (Digenea: Opisthorchiidae, a Parasite of the Rodent Nectomys squamipes (Cricetidae from Minas Gerais, Brazil

    Directory of Open Access Journals (Sweden)

    Antonio HA de Moraes Neto

    1998-03-01

    Full Text Available Amphimerus bragai n.sp. (Digenea, Opisthorchiidae from the bile ducts of a rodent from the State of Minas Gerais, Brazil, Nectomys squamipes (Cricetidae, is described. The new species was studied by both light and scanning electron microscopy. A table is presented comparing the measurements of the new species with those of A. lancea (Diesing, 1850 and A. vallecaucensis Thatcher, 1970, parasites of dolphins and marsupials, respectively. The new species is similar in size and body form to A. vallecaucensis from which it differs in having a vitellarium that extends to the acetabulum while that of the former species are limited to the posterior one-third of the body. Additionally, the new species is from a rodent.

  7. Amphimerus bragai n. sp. (Digenea: Opisthorchiidae), a parasite of the rodent Nectomys squamipes (Cricetidae) from Minas Gerais, Brazil.

    Science.gov (United States)

    de Moraes Neto, A H; Thatcher, V E; Lanfredi, R M

    1998-01-01

    Amphimerus bragai n.sp. (Digenea, Opisthorchiidae) from the bile ducts of a rodent from the State of Minas Gerais, Brazil, Nectomys squamipes (Cricetidae), is described. The new species as studied by both light and scanning electron microscopy. A table is presented comparing the measurements of the new species with those of A. lancea (Diesing, 1850) and A. vallecaucensis Thatcher; 1970, parasites of dolphins and marsupials, respectively. The new species is similar in size and body form to A. vallecaucensis from which it differs in having a vitellarium that extends to the acetabulum while that of the former species are limited to the posterior one-third of the body. Additionally, the new species is from a rodent.

  8. Regional comparison of syn- and post-rift sequences in salt and salt-free basins offshore Brazil and Angola/Namibia, South Atlantic

    Science.gov (United States)

    Strozyk, Frank; Back, Stefan; Kukla, Peter

    2015-04-01

    The large South Atlantic basins offshore South America and Africa record a highly variable syn- to post-breakup tectono-stratigraphic development. The present-day diversity in the structural and sedimentary architecture of the conjugate margins offshore southern Brazil, Namibia and Angola reflects variations in the interplay of a number of controlling factors, of which the most important are i) the structural configuration of each margin segment at the time of break-up, ii) the post break-up geodynamic history including tectonics and magmatism, and iii) variations in the type, quantity and distribution of sediment input to the respective margin segment. Particularly the basins around the Rio Grande Rise - Walvis Ridge volcanic complex show a pronounced tectono-stratigraphic asymmetry both along the respective continental margin and across the Atlantic. Only a few attempts exist to establish a regional tectono-stratigraphic correlation framework across the South Atlantic Ocean, mainly because of the lack of data across entire margin segments and limited resolution of basin wide geophysics. Still unresolved issues particularly concern the explanation of the basin-specific geological evolution of respective margin segments along the same continental margin, as well as the correlation of conjugate basins and margin segments across the Atlantic Ocean. In our study we present interpretations and first-pass restorations of regional 2D seismic-reflectivity data from the large basins offshore Brazil (Pelotas Basin, Santos Basin, Campos Basin, Espirito Santo Basin), and offshore Namibia and Angola (Walvis Basin, Namibe Basin, Benguela Basin, Kwanza Basin), which represent four adjacent pairs of conjugate basins on both sides of the South Atlantic. Results are used to document and compare on a basin-scale the contrasting styles of rift and post-rift settings during and after the continental breakup.

  9. Pilidiella tibouchinae sp. nov. associated with foliage blight of Tibouchina granulosa (quaresmeira) in Brazil

    NARCIS (Netherlands)

    Miranda, B.E.; Barreto, R.W.; Crous, P.W.; Groenewald, J.Z.

    2012-01-01

    Tibouchina granulosa (Melastomataceae), Brazilian glorytree (Brazilian common name - quaresmeira), a common tree of the Atlantic Forest of Brazil, is widely used as an ornamental for its violet or pink blossoms. Little is known about fungal diseases affecting this species, although these represent a

  10. Pouzolzia saxophila sp. nov. (Urticaceae tribe Boehmerieae) from Bahia, Brazil

    DEFF Research Database (Denmark)

    Wilmot-Dear, Christine Melanie; Friis, Ib; Monro, Alex K.

    2015-01-01

    of xerophytic scrub vegetation on rocky outcrops in the Boa Nova National Park, Bahia, Brazil. The new species is somewhat similar to P. pringlei, a Mexican endemic, and to P. amambaiensis from the Brazil–Paraguay border, but also to the widespread Asiatic P. zeylanica. However, the similarities...

  11. Exploration potential of Paraiba and Natal platform basins, NE Brazil; Potencial exploratorio das bacias da Paraiba e da plataforma de Natal, NE do Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, Jose A. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil); Lima Filho, Mario; Neumann, Virginio H. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Geologia; Maranhao Neto, Jose Carneiro; Araujo, Joao A.A. [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Programa de Pos Graduacao em Geociencias

    2008-07-01

    The portion of Brazilian continental margin located between the Pernambuco Shear Zone (ZCPE) and Touros High, enclosing Natal Platform and Paraiba basin, NE Brazil, presents a thin sedimentary cover represented by Neo- Cretaceous deposits, over an elevated basement. In this zone the narrow platform ends abruptly against the ocean plate, forming a scarped slope. This area corresponds to the Transverse zone of Northeast Brazil (TZN) limited by two extensive transcurrent E-W shear zones that acted as accommodation zones for the strain produced by the advance of the southern and northern rift branches. During the Aptian, the rift suffered a NE deflection and contoured the Borborema Province and the TZN. The resistance of this block to the rift advance generated a prominent and elevated region into the Atlantic gulf which resulted in the absence of rift deposition over the Brazilian margin and its deviation to the African side. The model suggested by this paper denominates this area as the 'exception zone' of the Brazilian margin, which possess a poor petroliferous potential and need to be separated from the sector corresponding to the Pernambuco basin, located to south of ZCPE, representing the last piece of margin before the rift deflection and possessing an important petroliferous potential. (author)

  12. [Primary healthcare: a multidimensional study on challenges and potential in the São Paulo Metropolitan Region (SP, Brazil)].

    Science.gov (United States)

    Heimann, Luiza Sterman; Ibanhes, Lauro Cesar; Boaretto, Roberta Cristina; Castro, Iracema Ester do Nascimento; Telesi Júnior, Emilio; Cortizo, Carlos Tato; Fausto, Márcia Cristina Rodrigues; do Nascimento, Vânia Barbosa; Kayano, Jorge

    2011-06-01

    This paper presents some results of a case study in the Metropolitan Region of São Paulo (SP, Brazil) as part of a multicentric study conducted in Argentina, Brazil, Paraguay and Uruguay. The aim is to evaluate Primary Health Care (PHC) as a strategy to achieve integrated and universal healthcare systems. The methodological approach was based on five analytical dimensions: stewardship capability; financing; provision; comprehensiveness and intersectoral approach. The techniques included literature review, document analysis and interviews with key informants: policy makers; managers, experts, users and professionals. The results were organized in response to the challenges and possibilities of PHC as a structural system according to the five dimensions. The following emerged from the interviews: different interpretations on the concept and role of PHC and a consensus as the gateway to the system; weaknesses in funding; challenges in health workforce administration and the need for new legal-institutional design for regional management. The potential aspects were: broader coverage/universality, PHC as the basis for the organization of the system; connection with the territory and understanding specific population needs.

  13. Experimental and molecular study of cercariae of Clinostomum sp. (Trematoda: Clinostomidae) from Biomphalaria spp. (Mollusca: Planorbidae) in Brazil.

    Science.gov (United States)

    Pinto, H A; Caffara, M; Fioravanti, M L; Melo, A L

    2015-02-01

    Despite the large number of reports of species of Clinostomum from vertebrate hosts in South America, studies evaluating the molluscan transmitters of these parasites are scarce. In the present study, clinostomatoid cercariae shed from 0.02% (4/17,485) specimens of Biomphalaria spp., collected at the Pampulha reservoir, Belo Horizonte, Minas Gerais, Brazil, were used for experimental infection of Poecilia reticulata . Samples of cercariae from molluscs and metacercariae experimentally obtained from fish were subjected to morphological and molecular analyses and compared with species of Clinostomum reported in the Americas. The cercariae and metacercariae, here identified as Clinostomum sp., present general morphology similar to that reported for Clinostomum marginatum , however, from molecular point of view, differ significantly from North American C. marginatum and other species of Clinostomum reported in South America. These results suggest that the diversity of Clinostomum found in Brazil may be underestimated. Additional studies aimed at molecular characterization of South American species of Clinostomum, including the finding of specimens with sequences similar to that reported for C. marginatum in North America are required.

  14. Reservoir storage and hydrologic responses to droughts in the Paraná River basin, south-eastern Brazil

    Science.gov (United States)

    Melo, Davi de C. D.; Scanlon, Bridget R.; Zhang, Zizhan; Wendland, Edson; Yin, Lei

    2016-11-01

    Droughts are particularly critical for Brazil because of impacts on water supply and because most (70 %) of its electricity is derived from hydroelectric generation. The Paraná basin (PB), a major hydroelectric producing region with 32 % (60 million people) of Brazil's population, recently experienced the most severe drought since the 1960s, compromising the water supply for 11 million people in São Paulo. The objective of this study is to quantify linkages between meteorological and hydrological droughts based on remote sensing, modelling, and monitoring data using the Paraná River basin in south-eastern Brazil as a case study. Two major meteorological droughts were identified in the early 2000s and 2014, with precipitation 20-50 % below the long-term mean. Total water storage change estimated from the Gravity Recovery and Climate Experiment (GRACE) satellites declined by 150 km3 between April 2011 and April 2015. Simulated soil moisture storage declined during the droughts, resulting in decreased runoff into reservoirs. As a result, reservoir storage decreased by 30 % relative to the system's maximum capacity, with negative trends ranging from 17 (May 1997-April 2001) to 25 km3 yr-1 (May 2011-April 2015). Storage in upstream reservoirs is mostly controlled by natural climate forcing, whereas storage in downstream reservoirs also reflects dam operations. This study emphasizes the importance of integrating remote sensing, modelling, and monitoring data to evaluate droughts and to establish a preliminary understanding of the linkages between a meteorological and hydrological drought for future management.

  15. Taxonomic revision of the fossil pulmonate mollusks of Itaboraí Basin (Paleocene, Brazil

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    Rodrigo Brincalepe Salvador

    2013-01-01

    Full Text Available The limestones of Itaboraí Basin (Middle Paleocene, Rio de Janeiro, Brazil, harbor a rich fossil molluscan fauna consisting exclusively of pulmonate snails, both terrestrial and freshwater. An extensive taxonomic revision of this paleofauna is conducted here. A new genus, Cortana, is described as well as two new species, Eoborus fusiforme and Gastrocopta itaboraiensis. The revised classification is as follows: Austrodiscus lopesi (Charopidae; Biomphalaria itaboraiensis (Planorbidae; "Brachypodella" britoi (Urocoptidae; Brasilennea arethusae, Brasilennea guttula, Brasilennea minor (Cerionidae; Bulimulus fazendicus, Bulimulus trindadeae, Cortana carvalhoi, Cyclodontina coelhoi, Itaborahia lamegoi, Leiostracus ferreirai, Plagiodontes aff. dentatus (Orthalicidae; Cecilioides sommeri (Ferussaciidae; Eoborus rotundus, Eoborus sanctijosephi, Eoborus fusiforme (Strophocheilidae; Gastrocopta mezzalirai, Gastrocopta itaboraiensis (Gastrocoptidae; Temesa magalhaesi (Clausiliidae. The species Strobilopsis mauryae was considered a synonym of Brasilennea arethusae; Bulimulus sommeri a synonym of Itaborahia lamegoi; and Vorticifex fluminensis a synonym of Eoborus sanctijosephi. Itaboraí Basin has the most ancient records of the families Orthalicidae, Gastrocoptidae, Ferussaciidae and Strophocheilidae. Moreover, the basin's records of Charopidae, Clausiliidae, Cerionidae, and Urocoptidae are among the most ancient in the world and, among these, those of Cerionidae, Clausiliidae and Urocoptidae deserve special attention since they are greatly removed from these families' current distribution. Additionally, Itaboraí has the most ancient records for the genera Austrodiscus, Brachypodella, Bulimulus, Cecilioides, Cyclodontina, Eoborus, Gastrocopta, Leiostracus, Plagiodontes and Temesa. There are three endemic genera in the basin: Brasilennea, Cortana and Itaborahia. Further discussion on paleobiogeography and evolution of this paleofauna is also provided.Os calc

  16. Radiometric age determination of tonsteins and stratigraphic constraints for the Lower Permian coal succession in southern Parana Basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Guerra-Sommer, Margot; Cazzulo-Klepzig, Miriam; Hartmann, Leo Afraneo; Formoso, Milton Luis Laquintinie [Instituto de Geociencias, Universidade Federal do Rio Grande do Sul, Avenida Bento Goncalves, 9500, 91501-970 Porto Alegre, Rio Grande do Sul (Brazil); Santos, Joao Orestes Schneider [Centre for Global Targeting, University of Western Australia, Crawley, Perth 6009, WA (Australia); Ketzer, Joao Marcelo [Instituto de Meio Ambiente, Pontificia Universidade Catolica, Avenida Ipiranga, Porto Alegre, Rio Grande do Sul (Brazil)

    2008-03-03

    Ion microprobe (SHRIMP II) dating of zircons from tonsteins interbedded with coal seams from the Candiota and Faxinal coalfields (Early Permian, Rio Bonito Formation, Parana Basin, Brazil) is presented. The mean ages obtained (290.6 {+-} 1.5 Ma) are more precise than previously published intervals. Calibrations of chronostratigraphic data with radiometric ages show that the main coal succession from the southern Basin is constrained to the Middle Sakmarian. The {+-} 2 Ma time interval of deposition supports the hypothesis that the coal-generating process was quite rapid in terms of geological time. In a general context, Faxinal and Candiota coals are assigned, into the Protohaploxypinus goraiensis Subzone, besides some paleocological differences evidenced by palynological studies. This bio-interval does not correspond to a consistent palynostratigraphic tool and more accurate biostratigraphic zonation for the Carboniferous-Permian interval must be delineated. The new results have far-reaching significance for correlations of the Basin with sequences of the Argentinian Paganzo Basin (302 {+-} 6 Ma and 288 {+-} 7 Ma) and also with the Karoo Basin, with the lowermost Ecca Group (288 {+-} 3 Ma and 289.6 {+-} 3.8 Ma). This new evidence supports the presence of an active and widespread Lower Permian explosive volcanic event in western Gondwana, which is interpreted as the same volcanism which produced the Choiyoi Group in western Argentina. According to this correlation the ash-fall source is located about 1400 km to the southwest of their area of deposition. (author)

  17. Trifurcatia flabellata n. gen. n. sp., a putative monocotyledon angiosperm from the Lower Cretaceous Crato Formation (Brazil

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    B. Mohr

    2002-01-01

    Full Text Available The Lower Cretaceous Crato Formation (northeast Brazil contains plant remains, here described as Trifurcatia flabellata n. gen. and n. sp., consisting of shoot fragments with jointed trifurcate axes, each axis bearing a single amplexicaul serrate leaf at the apex. The leaves show a flabellate acrodromous to parallelodromous venation pattern, with several primary, secondary and higher order cross-veins. This very unique fossil taxon shares many characters with monocots. However, this fossil taxon exhibits additional features which point to a partly reduced, and specialized plant, which probably enabled this plant to grow in (seasonally dry, even salty environments. In der unterkretazischen Cratoformation (Nordostbrasilien sind Pflanzenfossilien erhalten, die hier als Trifurcatia flabellata n. gen. n. sp. beschrieben werden. Sie bestehen aus trifurcaten Achsen, mit einem apikalen amplexicaulen fächerförmigen serraten Blatt. Diese Blätter zeigen eine flabellate bis acrodrome-paralellodrome Aderung mit Haupt- und Nebenadern und transversale Adern 3. Ordnung. Diese Merkmale sind typisch für Monocotyledone. Allerdings weist dieses Taxon einige Merkmale auf, die weder bei rezenten noch fossilen Monocotyledonen beobachtet werden. Sie müssen als besondere Anpassungen an einen (saisonal trockenen und vielleicht übersalzenen Lebensraum dieser Pflanze interpretiert werden. doi:10.1002/mmng.20020050121

  18. Automatic Estimation of the Seafloor Geomorphology of the Santos Basin, Brazil

    Science.gov (United States)

    Calder, B. R.; Fonseca, L.; Francolin, J. B.

    2002-12-01

    The bathymetry and acoustic backscatter of Santos Basin, Brazil were mapped using a SeaBeam 2112 (12 kHz, 151 beam) Multibeam Echosounder (MBES) aboard the R/V Falcon Explorer. This MBES data was acquired from January-November, 2000, during a high-resolution multi-channel 3D seismic survey, resulting in 380 parallel lines of 90 km length, spaced 250 m apart. The final survey mapped an area of 5,000 km{}2 in water depths of 900--2000 m. These closely spaced multibeam tracks resulted in an average overlap between swaths of 1000%, thereby ensonifying most areas of the seafloor at least ten times. Traditional (hand) processing of a dataset this dense is time-consuming and tedious, and is prone to subjective decisions and operator fatigue. However, the density of the survey makes it ideal for automatic processing methods. Recently, we have developed an algorithm called CUBE that addresses the twin concerns of robustness and reliability that are often raised about automatic processing methods. Based on a very robust multiple hypothesis Bayesian estimator, CUBE processes MBES bathymetry directly into a set of gridded products representing the best estimate of probable depth, and a measure of the uncertainty associated with this estimate. We apply CUBE to the Santos Basin data, illustrating in terms of processing time and human effort the advantages of processing such data automatically. We compare the automatically generated data with a hand-processed set, showing that the results agree to within the estimated experimental uncertainty. We next illustrate the use of CUBE as a data quality measure, indicating areas of concern in the data. Finally, we utilize the bathymetric grid resulting from CUBE to investigate the seafloor morphology, which includes a set of linear depressions parallel and perpendicular to the Shelf break. These linear depressions are the surface expression of fault planes related to subsurface salt walls. In the shallowest part, the detailed bathymetry

  19. Matéria-prima da formação Corumbataí na região do pólo cerâmico de Santa Gertrudes, SP, com características naturais para fabricação de argila expandida Sedimentary rocks from Corumbataí formation (Paraná basin, Brazil with natural characteristics to produce expanded clay lightweight aggregate

    Directory of Open Access Journals (Sweden)

    M. M. T. Moreno

    2012-09-01

    Full Text Available Estudou-se um material da base da Formação Corumbataí, proveniente de uma mineração de argila, que apresenta restrições de uso em cerâmica devido à sua dureza e, principalmente, ao alto conteúdo de matéria orgânica. Verificou-se que o material apresenta características naturais ótimas para a fabricação de argila expandida diretamente a partir de fragmentos de rocha, mostrando comportamento piroplástico com expansão significativa se submetido à queima rápida. A caracterização da matéria-prima e do produto foi realizada mediante análise de carbono orgânico, difração de raios X, microscopia ótica e testes de queima. Foram determinadas as condições de queima para obter argila expandida utilizando forno de queima rápida e forno a rolos, ambos de laboratório, obtendo corpos com densidade variável (que podem chegar a valores menores que 0,5 g.cm-3 até o limite de expansão. Esta densidade é obtida devido à formação de poros fechados e uma película externa vítrea, que proporcionam uma resistência mecânica alta aos fragmentos expandidos.This paper refers to the study of the material of the base of the Corumbataí formation (Parana Basin, Brazil of a clay mine, which presents limits for its use in ceramic tiles in dry grinding process due to its hardness and, especially, the high content of organic matter in relation to the clay overlaid. The characterization of the raw material and the product was accomplished by organic carbon analysis, X-ray diffraction, optical microscopy and test-firing. Firing conditions were determined to get expanded clay, using fast firing static kiln and a continuous roller kiln, both from laboratory equipment, getting samples with variable density up to the limit of expansion, with density that can reach values lower than 0.5 g.cm-3 because of the formation of closed pores and an external vitreous foil which provide a high mechanical resistance to the particles.

  20. Growth ring analysis of fossil coniferous woods from early cretaceous of Araripe Basin (Brazil

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    Etiene F. Pires

    2011-06-01

    Full Text Available Growth ring analysis on silicified coniferous woods from the Missão Velha Formation (Araripe Basin - Brazil has yielded important information about periodicity of wood production during the Early Cretaceous in the equatorial belt. Despite warm temperatures, dendrological data indicate that the climate was characterized by cyclical alternation of dry and rainy periods influenced by cyclical precipitations, typical of tropical wet and dry or savanna climate. The abundance of false growth rings can be attributed to both occasional droughts and arthropod damage. The present climate data agree with palaeoclimatic models that inferred summer-wet biomes for the Late Jurassic/Early Cretaceous boundary in the southern equatorial belt.A partir de análise de anéis de crescimento em lenhos de coníferas silicificadas provenientes da Formação Missão Velha(Bacia do Araripe - Brasil, obteve-se importantes informações a respeito da periodicidade de produção lenhosa duranteo início do Cretáceo, na região do equador. Apesar das estimativas de temperatura apresentarem-se elevadas, os dados dendrológicos indicam que o clima foi caracterizado pela alternância cíclica de períodos secos e chuvosos, influenciado por precipitações periódicas, típico das condições atuais de climatropical úmido e seco ou savana. A abundância de falsosanéis de crescimento pode ser atribuída tanto a secas ocasionais quanto a danos causados por artrópodes. Os dados paleoclimáticos aqui obtidos corroboram com modelos paleoclimáticos que inferem a ocorrência de um bioma de verões úmidos para o limite Neojurássico/Eocretáceo ao sul do equador.

  1. Natural radionuclides in major aquifer systems of the Parana sedimentary basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Bonotto, Daniel Marcos, E-mail: danielbonotto@yahoo.com.br [Departamento de Petrologia e Metalogenia, IGCE-Instituto de Geociencias e Ciencias Exatas, UNESP-Universidade Estadual Paulista Julio de Mesquita Filho, Av. 24-A, No. 1515 - CP 178, CEP 13506-900-Rio Claro, SP (Brazil)

    2011-10-15

    This paper describes the natural radioactivity of groundwater occurring in sedimentary (Bauru and Guarani) and fractured rock (Serra Geral) aquifer systems in the Parana sedimentary basin, South America that is extensively used for drinking purposes, among others. The measurements of gross alpha and gross beta radioactivity as well the activity concentration of the natural dissolved radionuclides {sup 40}K, {sup 238}U, {sup 234}U, {sup 226}Ra, {sup 222}Rn, {sup 210}Po and {sup 210}Pb were held in 80 tubular wells drilled in 21 municipalities located at Sao Paulo State and its border with Mato Grosso do Sul State in Brazil. Most of the gross alpha radioactivity data were below 1 mBq/L, whereas values exceeding the gross beta radioactivity detection limit of 30 mBq/L were found. The radioelement solubility in the studied systems varied according to the sequence radon>radium>other radionuclides and the higher porosity of sandstones relatively to basalts and diabases could justify the enhanced presence of dissolved radon in the porous aquifer. The implications of the data obtained in terms of standards established for defining the drinking water quality have also been discussed. The population-weighted average activity concentration for these radionuclides was compared to the guideline value of 0.1 mSv/yr for the total effective dose and discussed in terms of the choice of the dose conversion factors. - Highlights: > Integration of distinct radiometric data acquired in groundwaters. > Radiation dose in important hydrological resources in South America. > Contribution of {sup 226}Ra for the more accentuated radiation dose in aquifers. > Dose factors for Rn and generation of values exceeding the maximum of 0.1 mSv/yr.

  2. Dolomitized cells within chert of the Permian Assistência Formation, Paraná Basin, Brazil

    Science.gov (United States)

    Calça, Cléber P.; Fairchild, Thomas R.; Cavalazzi, Barbara; Hachiro, Jorge; Petri, Setembrino; Huila, Manuel Fernando Gonzalez; Toma, Henrique E.; Araki, Koiti

    2016-04-01

    Dolomitic microscopic structures in the form of microspheres, "horseshoe- shaped" objects, and thin botryoidal crusts found within microfossiliferous chert within stromatolites of the Evaporite Bed (EB) of the Permian Assistência Formation, Irati Subgroup, Paraná Basin, Brazil, have been investigated by means of optical microscopy, X-ray fluorescence, scanning electron microscopy, Raman spectrometry and energy-dispersive X-ray spectrometry. The microspheres were identified as dolomitized coccoidal cyanobacteria based on similarity in size, spheroidal and paired hemispheroidal morphologies and colonial habit to co-occurring silicified organic-walled cyanobacteria embedded within the same microfabric and rock samples. The co-occurrence of dolomite, pyrite framboids, and abundant dispersed carbonaceous material and silicified cells is consistent with a hypersaline depositional environment with abundant cyanobacterial mats and elevated Mg2 +/Ca2 + ratios and reducing conditions with active anoxic microbial processes near the water-(bio)sediment interface. The abundance of extracellular polymeric substances facilitated anoxic microbial processes (sulfate reduction), providing essential conditions for possible primary microbially induced dolomitization. In most of the dolomitized cells dolomite occurs only as an external layer; in fully dolomitized cells magnesium is richest in the outermost layer. Presumably, the dolomitization process was favored by the presence of anoxic microbial degraders and negatively charged functional groups at the surface of the cyanobacterial cells. Botryoidal dolomite rims of silica-filled fenestrae formed by a similar process and inherited the botryoidal morphology of the cell as originally lining the fenestrae. Silicification interrupted the dolomitization of the largely organic biosediment, mostly by permineralization, but locally by substitution, thereby preserving not only dolomitic microspheres, but also huge numbers of structurally

  3. Sediment Thicknesses and Qs vs. Qp Relations in the Kachchh Rift Basin, Gujarat, India Using Sp Converted Phases

    Science.gov (United States)

    Mandal, Prantik

    2007-01-01

    Delineation of the top sedimentary structure and its Qs vs. Qp relationship using the travel-time difference of direct S and converted Sp phase is key to understanding the seismic hazard of any sedimentary basin area. We constructed filtered displacement waveforms from local ETNA Episensor acceleration recordings as well as local velocity recordings of aftershocks of the 2001 Bhuj earthquake recorded by the Kachchh seismological network of the National Geophysical Research Institute (NGRI), Hyderabad, India during 2001 2004. Stations are within 15 70km of epicenters, and the resulting displacement waveforms are generally simple, displaying prominent P, Sp, and S wave pulses. Particle motion of P and S waves suggest near-vertical raypaths consistent with preliminary depth estimates. The direct S wave on the horizontal component is characterized by lower frequency content than the converted Sp phase on the vertical component. This difference in frequency content between S and Sp phases can be explained in terms of different attenuation effects for P and S waves in the unconsolidated sediments. The Sp phase is generated by S-to-P phase conversion at the base of Mesozoic sediments of the Kachchh basin. Travel-time inversion (VELEST) of 2565 P and 2380 S arrivals from 658 well located aftershocks recorded at 8 14 three-component local seismic stations led to 1 D velocity models indicated very slow sediments in the upper 0 2 km depth range (Vp: 2.92 km/s and Vs: 0.90 km/s) and an increasing trend of velocities with depth at 2 40 km depth. The estimated sediment thicknesses beneath 12 accelerograph and 6 seismograph sites from the estimated velocity model and the travel-time difference between S and converted Sp phases reaches a maximum of (1.534 ± 0.117) km beneath Bandri (near the location of 2001 Bhuj mainshock) and attains a minimum sediment thickness of (0.858 ± 0.104) km beneath Ramvav and Burudia. The spectral ratios between Sp and S from 159 three

  4. Porta-enxertos para a lima-ácida-'Tahiti' na região de Bebedouro, SP Rootstocks for 'Tahiti' acid lime in Bebedouro region, SP, Brazil

    Directory of Open Access Journals (Sweden)

    JOSÉ ORLANDO DE FIGUEIREDO

    2002-04-01

    Full Text Available Foi instalado um experimento de seleção de porta-enxertos para a lima-ácida-'Tahiti' (Citrus latifolia Tanaka, em dezembro de 1988, na Estação Experimental de Citricultura de Bebedouro-SP, com o objetivo de conhecer seu comportamento e oferecer novas opções de plantio para as condições ecológicas semelhantes às daquela região. A variedade copa, originária do BAG-Citros do IAC, localizado no Centro de Citricultura Sylvio Moreira, Cordeirópolis-SP, é um clone nucelar de 'Tahiti', denominado IAC-5. Os porta-enxertos, que tiveram a mesma origem, foram: tangerinas-'Sunki' (Citrus sunki Hort. ex Tanaka; 'Cleópatra'(Citrus reshni Hort. ex Tan.; 'Batangas' e 'Oneco' (Citrus reticulata Blanco; trifoliata-EEL (Poncirus trifoliata Raf.; limão-'Cravo' (Citrus limonia Osbeck; limão-'Volkameriano Catania 2' (Citrus volkameriana Tan. & Pasq.; tangelo-'Orlando' (C. reticulata Blanco x Citrus paradisi Macf.; citrumelo-'Swingle' (P. trifoliata Raf. X C.paradisi Macf.; citrange-'Morton' (P. trifoliata Raf. X C. sinensis (L. Osbeck e laranja-'Caipira DAC' (C. sinensis (L. Osbeck. Com relação à produção, avaliada no período de 1991 a 1998, os porta-enxertos de melhor comportamento foram o tangelo-'Orlando', citrange-'Morton' e citrumelo-'Swingle'. As mais baixas produções ocorreram nos porta-enxertos de tangerina e de laranja-'Caipira DAC'. O limão-'Cravo' apresentou produção intermediária e proporcionou curta vida útil às plantas.In 1988 an experiment was established in Bebedouro, SP (Brazil, in order to evaluate eleven rootstocks for 'Tahiti' lime (Citrus latifolia Tanaka. Scion variety was the IAC 5 cultivar, from IAC germplasm bank at Cordeirópolis, SP; all rootstocks were also obtained at that institution. A randomized blocks design was used as statistical model, with eleven blocks and one plant per treatment. The eleven treatments were: 'Sunki' (Citrus sunki Hort. ex Tanaka, 'Cleópatra'(Citrus reshni Hort. ex Tan., 'Batangas

  5. American cutaneous leishmaniasis in the Pontal of Paranapanema - SP, Brazil: ecological and entomological aspects

    OpenAIRE

    ALESSI, Claudia Álvares Calvo; Galati, Eunice Aparecida Bianchi; José Roberto ALVES; CORBETT, Carlos Eduardo Pereira

    2009-01-01

    American cutaneous leishmaniasis (ACL) occurs in epidemic outbreaks and in sporadic cases with small annual variation in the Pontal of Paranapanema, SP. There is little research on the sandfly fauna of this region. The last outbreaks were related to the Movement of the Landless Workers (MST) and with the ecological tourism in preserved forest of the Parque Estadual do Morro do Diabo (PEMD). AIM: identification of the sandfly fauna within the PEMD, mainly anthropophilic species already incrimi...

  6. Mammal assemblage of the agroecosystem constituents of the Várzea River Basin, Rio Grande do Sul, Brazil

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    Felipe Bortolotto Peters

    2010-12-01

    Full Text Available We provide recent information on the richness of mammals along the agroecosystems of the Rio da Várzea Basin, Rio Grande do Sul, Brazil. We used different field techniques to confirm the occurrence of 46 mammal species in this area. Nine species are threatened in at least one of the three “red lists” at state, national and global levels. Adding the up-to-date results obtained in the field to available data, mainly for conservation units, we present a richness of 85 species recorded for the basin. This number represents about 50% of mammals documented for Rio Grande do Sul state. The results suggest the importance of maintaining protected areas in altered regions, confirming the relevance of inventories of local fauna as a first approach to specific studies addressed to distribution, systematics, cytogenetics, physiology, population and community ecology.

  7. Occurrence of the parasitoid Anastatus sp. in eggs of Leptoglossus zonatus under the maize in Brazil Ocorrência do parasitóide Anastatus sp. em ovos de Leptoglossus zonatus em milho no Brasil

    Directory of Open Access Journals (Sweden)

    Carlos Henrique Marchiori

    2003-08-01

    Full Text Available The objective of this study was to report, for the first time in Brazil, the occurrence of the parasitoid Anastatus sp. (Hymenoptera: Eupelmidae in eggs of Leptoglossus zonatus (Hemiptera: Coreidae on maize (Zea mays L. in Itumbiara County, State of Goias, Brazil (18°25'S; 49°13'W. Percent parasitism was 6.9%.O objetivo dessa nota é registrar a primeira ocorrência, no Brasil, do parasitóide Anastatus sp. (Hymenoptera: Eupelmidae em ovos de Leptoglossus zonatus (Hemiptera: Coreidae em cultivar de milho em Itumbiara, Estado de Goiás (18°25'S; 49°13'W. A porcentagem de parasitismo foi de 6,9%.

  8. Eurytoma sp. (Hymenoptera: Pteromalidae como parasitóide de Fannia pusio (Wiedemann (Diptera: Fanniidae no Brasil Eurytoma sp. (Hymenoptera: Pteromalidae as a parasitoid of Fannia pusio (Wiedemann (Diptera: Fanniidae in Brazil

    Directory of Open Access Journals (Sweden)

    C.H. Marchiori

    2007-08-01

    Full Text Available This study reports, for the first time, the occurrence of Eurytoma sp. (Hymenoptera: Pteromalidae as parasitoid of Fannia pusio (Wiedemann (Diptera: Fanniidae found in chicken dung in Itumbiara, Goiás, Brazil. Manure samples, collected at two weeks intervals, were taken to the laboratory and the pupae were extracted by water flotation. Each pupa was placed in capsules of colorless gelatin until the emergence of dipterous or their parasitoids. The parasitism was 1.3%.

  9. Eurytoma sp. (Hymenoptera: Pteromalidae) como parasitóide de Fannia pusio (Wiedemann) (Diptera: Fanniidae) no Brasil Eurytoma sp. (Hymenoptera: Pteromalidae) as a parasitoid of Fannia pusio (Wiedemann) (Diptera: Fanniidae) in Brazil

    OpenAIRE

    C.H. Marchiori

    2007-01-01

    This study reports, for the first time, the occurrence of Eurytoma sp. (Hymenoptera: Pteromalidae) as parasitoid of Fannia pusio (Wiedemann) (Diptera: Fanniidae) found in chicken dung in Itumbiara, Goiás, Brazil. Manure samples, collected at two weeks intervals, were taken to the laboratory and the pupae were extracted by water flotation. Each pupa was placed in capsules of colorless gelatin until the emergence of dipterous or their parasitoids. The parasitism was 1.3%.

  10. Tectonic subsidence history and source-rock maturation in the Campos Basin, Brazil

    NARCIS (Netherlands)

    Beglinger, S.E.; Wees, J.D. van; Cloetingh, S.; Doust, H.

    2012-01-01

    The Campos Basin is a petroleum-productive, marginal sag basin along the Brazilian margin. It contains a stratigraphic sequence recording lithospheric extension and rift tectonics developing to a fully evolved postbreakup setting. We present a combined approach using subsidence analysis and basin hi

  11. Crustal structure beneath the Paleozoic Parnaíba Basin revealed by airborne gravity and magnetic data, Brazil

    Science.gov (United States)

    de Castroa, David L.; Fuck, Reinhardt A.; Phillips, Jeffrey D. Phillips; Vidotti, Roberta M.; Bezerra, Francisco H.R.; Dantas, Elton L.

    2014-01-01

    The Parnaíba Basin is a large Paleozoic syneclise in northeastern Brazil underlain by Precambrian crystalline basement, which comprises a complex lithostructural and tectonic framework formed during the Neoproterozoic–Eopaleozoic Brasiliano–Pan African orogenic collage. A sag basin up to 3.5 km thick and 1000 km long formed after the collage. The lithologic composition, structure, and role in the basin evolution of the underlying basement are the focus of this study. Airborne gravity and magnetic data were modeled to reveal the general crustal structure underneath the Parnaíba Basin. Results indicate that gravity and magnetic signatures delineate the main boundaries and structural trends of three cratonic areas and surrounding Neoproterozoic fold belts in the basement. Triangular-shaped basement inliers are geophysically defined in the central region of this continental-scale Neoproterozoic convergence zone. A 3-D gravity inversion constrained by seismological data reveals that basement inliers exhibit a 36–40.5 km deep crustal root, with borders defined by a high-density and thinner crust. Forward modeling of gravity and magnetic data indicates that lateral boundaries between crustal units are limited by Brasiliano shear zones, representing lithospheric sutures of the Amazonian and São Francisco Cratons, Tocantins Province and Parnaíba Block. In addition, coincident residual gravity, residual magnetic, and pseudo-gravity lows indicate two complex systems of Eopaleozoic rifts related to the initial phase of the sag deposition, which follow basement trends in several directions.

  12. Modelling of point and diffuse pollution: application of the Moneris model in the Ipojuca river basin, Pernambuco State, Brazil.

    Science.gov (United States)

    de Lima Barros, Alessandra Maciel; do Carmo Sobral, Maria; Gunkel, Günter

    2013-01-01

    Emissions of pollutants and nutrients are causing several problems in aquatic ecosystems, and in general an excess of nutrients, specifically nitrogen and phosphorus, is responsible for the eutrophication process in water bodies. In most developed countries, more attention is given to diffuse pollution because problems with point pollution have already been solved. In many non-developed countries basic data for point and diffuse pollution are not available. The focus of the presented studies is to quantify nutrient emissions from point and diffuse sources in the Ipojuca river basin, Pernambuco State, Brazil, using the Moneris model (Modelling Nutrient Emissions in River Systems). This model has been developed in Germany and has already been implemented in more than 600 river basins. The model is mainly based on river flow, water quality and geographical information system data. According to the Moneris model results, untreated domestic sewage is the major source of nutrients in the Ipojuca river basin. The Moneris model has shown itself to be a useful tool that allows the identification and quantification of point and diffuse nutrient sources, thus enabling the adoption of measures to reduce them. The Moneris model, conducted for the first time in a tropical river basin with intermittent flow, can be used as a reference for implementation in other watersheds.

  13. Lack of Cyathostomin sp. reduction after anthelmintic treatment in horses in Brazil.

    Science.gov (United States)

    Canever, Ricardo J; Braga, Pollyana R C; Boeckh, Albert; Grycajuck, Marcelly; Bier, Daniele; Molento, Marcelo B

    2013-05-01

    The increase of anthelmintic resistance in the last years in the nematode population of veterinary importance has become a major concern. The objective of the present study was to evaluate the efficacy of the main anthelmintic drugs available in the market against small strongyles of horses in Brazil. A total of 498 horses from 11 horse farms, located in the states of Paraná, São Paulo, Rio de Janeiro and Minas Gerais, in Brazil, were treated with ivermectin, moxidectin, pyrantel and fenbendazole, orally at their recommended doses. The fecal egg count reduction test (FECRT) was used to determine the product's efficacy and fecal culture was used to determine the parasite genus. Reduction on anthelmintic efficacy was found for fenbendazole in all horse farms (11/11), pyrantel in five yards (5/11) and ivermectin had low efficacy in one of the yards studied (1/11). Multidrug resistance of up to 3 drugs classes was found in one of the tested farms (1/11). Cyathostomin were the most prevalent parasite. The results showed that resistance to fenbendazole is widespread; the efficacy of pyrantel is in a critical situation. Although the macrocyclic lactones compounds still showed high efficacy on most farms, suspected resistance to macrocyclic lactones is of great concern.

  14. Epizootiology of Perkinsus sp. inCrassostrea gasar oysters in polyculture with shrimps in northeastern Brazil.

    Science.gov (United States)

    da Silva, Patricia Mirella; Costa, Carolina Pereira; de Araújo, Jaíse Paiva Bragante; Queiroga, Fernando Ramos; Wainberg, Alexandre Alter

    2016-01-01

    Bivalve culture is of considerable economic and social interest in northeastern (NE) Brazil. The polyculture is an alternative approach to traditional monoculture for reducing the environmental impact of shrimp farming and improving oyster culture. Perkinsus marinus and Perkinsus olseni were found infecting oysters in NE Brazil and can threaten oyster production. This study evaluated Perkinsus spp. occurrence in Crassostrea gasar during all production stages. Oyster spats were produced in a hatchery and grown in shrimp ponds in Rio Grande do Norte state. Perkinsus spp. were surveyed by Ray's fluid thioglycollate medium and confirmed by polymerase chain reaction. Prevalence and intensity of infection were determined in oysters until they reached 7 cm. Results showed that the broodstock was already infected by Perkinsus (60%), but the derived spats were Perkinsus-free. Oyster spats acquired Perkinsus infection when transferred to ponds. The prevalence gradually increased in the seven months following placement in ponds (73%), and then decreased to 17% by the tenth month. The infections were initially mild, but intensity increased at the final growth stage. In conclusion, it is possible to produce Perkinsus-free C. gasar oyster spats from infected broodstock, and their culture in shrimp ponds is feasible.

  15. Epizootiology of Perkinsus sp. inCrassostrea gasar oysters in polyculture with shrimps in northeastern Brazil

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    Patricia Mirella da Silva

    2016-03-01

    Full Text Available Abstract Bivalve culture is of considerable economic and social interest in northeastern (NE Brazil. The polyculture is an alternative approach to traditional monoculture for reducing the environmental impact of shrimp farming and improving oyster culture. Perkinsus marinus andPerkinsus olseni were found infecting oysters in NE Brazil and can threaten oyster production. This study evaluatedPerkinsus spp. occurrence in Crassostrea gasar during all production stages. Oyster spats were produced in a hatchery and grown in shrimp ponds in Rio Grande do Norte state.Perkinsus spp. were surveyed by Ray’s fluid thioglycollate medium and confirmed by polymerase chain reaction. Prevalence and intensity of infection were determined in oysters until they reached 7 cm. Results showed that the broodstock was already infected by Perkinsus (60%, but the derived spats were Perkinsus-free. Oyster spats acquired Perkinsus infection when transferred to ponds. The prevalence gradually increased in the seven months following placement in ponds (73%, and then decreased to 17% by the tenth month. The infections were initially mild, but intensity increased at the final growth stage. In conclusion, it is possible to produce Perkinsus-free C. gasar oyster spats from infected broodstock, and their culture in shrimp ponds is feasible.

  16. Antibiotic resistance and enterotoxin genes in Staphylococcus sp. isolates from polluted water in Southern Brazil

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    ANA P. BASSO

    2014-12-01

    Full Text Available The aim of this study was to evaluate the species distribution, antibiotic-resistance profile and presence of enterotoxin (SE genes in staphylococci isolated from the Dilúvio stream in South Brazil. Eighty-eight staphylococci were identified, 93.18% were identified as coagulase-negative (CNS and 6.82% coagulase-positive (CPS. Fourteen Staphylococcus species were detected and the most frequently were Staphylococcus cohnii (30.48% and S. haemolyticus (21.95%. Resistance to erythromycin was verified in 37.50% of the strains, followed by 27.27% to penicillin, 12.50% to clindamycin, 6.81% to trimethoprim-sulfamethoxazole, 5.68% to chloramphenicol and 2.27% to norfloxacin. None of the investigated strains showed gentamicin and ciprofloxacin resistance. The strains were tested for the presence of sea, seb, sec, sed and see genes by PCR and only CNS strains (43.18% showed positive results to one or more SE genes. The scientific importance of our results is due to the lack of data about these topics in polluted waters in Brazil. In conclusion, polluted waters from the Dilúvio stream may constitute a reservoir for disseminating antibiotic-resistance and enterotoxin into the community. In addition, the detection of staphylococci in the polluted waters of the Dilúvio stream indicated a situation of environmental contamination and poor sanitation conditions.

  17. Cytogenetic and morphometric analysis in the species Astyanax altiparanae Garutti & Britski, 2000 (Teleostei, Characidae) from the Iguatemi River Basin, Brazil.

    Science.gov (United States)

    Fernandes, Carlos Alexandre; Da Rocha, Rafael Henrique; Bailly, Dayani; Guterres, Zaira Da Rosa; Alves, Diandra Soares; Martins-Santos, Isabel Cristina

    2014-01-01

    The genus Astyanax is relatively common and encompasses various similar taxa forming a highly complex group that is difficult to precisely delimit. The present study aims to analyze cytogenetically and morphologically specimens of A. altiparanae belonging to distinct populations of the Iguatemi River Basin, Mato Grosso do Sul State, Brazil, for a better understanding of the evolutionary processes in this fish group. This study analysed 32 specimens of Astyanax altiparanae from Iguatemi River basin, MS, Brazil: 24 from the Agua Boa stream and 8 from the Santa Maria stream. All specimens showed a diploid number equal to 50 chromosomes with differences in the karyotypic formula and types of chromosomes bearing the NOR between the two localities. The constitutive heterochromatin showed interstitial markings evident in the region of some chromosomes in both populations. In the morphometric analysis, the first three axes were retained for interpretation which together explained 81% of variance, showing morphometric distinction between populations. Chromosomal and morphometric data obtained may be useful for taxonomic and phylogenetic studies in this group of fish.

  18. Water politics in Brazil subsidiarity and humanity aspects for the semi-arid sustainable river basin management

    Energy Technology Data Exchange (ETDEWEB)

    Guimaraes, Patricia Borba Vilar; Xavier, Yanko Marcius de Alencarr [Universidade Federal do Rio Grande do Norte (UFRN), Natal, RN (Brazil). Dept. de Direito Publico

    2010-02-15

    This paper examines Brazilian national constitutional law interpretation about water resources management, environmental protection and sustainable development principles. Institutional scenario is characterized under an economical format, important to conciliate human rights guaranties, national development and water protection. We provide subsidies for legal and institutional analysis considering human rights and an equity desirable scenario. Institutional context in Brazil assumes that Federal Law No. 9433/97 determined that water management must improve its multiple uses, decentralization and social participation. Water resources management in Brazil is legally and institutionally marked by the presence of the subsidiarity principle. We analyze the case in current national scene, with its consequent conflict in Sao Francisco River Basin, a semi arid Northeastern River Basin. This work also reflects some aspects of water pricing as defined by State politics. Some parameters are discussed as an elementary presupposition for water regulatory instruments that will define respective water management policy. Therefore, when defining criteria water fees, laws must comply with constitutional principles and the parameters established by the Brazilian Water Law (Law 9.433/97). The lack of reasonability and proportionality in dealing with the formal aspects and, specially, in defining water allocation, can obstruct the subsidiary principle application as determined by the Law 9433/97 and National Water Resources Policy. The question is observed in a more detailed focus over Northeastern Brazilian semi-arid region, where scarcity and traditional relations on politics are difficult to deal with, according to a renewed vision of the State and sustainable development principles. (author)

  19. Checklist of Ephemeroptera (Insecta from São Mateus River Basin, Espírito Santo, Brazil

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    Kamila Batista Angeli

    2015-09-01

    Full Text Available ABSTRACTIn order to expand the knowledge on the composition of Ephemeroptera from large rivers, we present, herein, the first survey of mayflies from the São Mateus River Basin, Espírito Santo State. Adults were collected biannually in 2012 and 2013 with the aid of Pennsylvania light trap in eleven points distributed in the main river of the river basin, São Mateus River and its two main tributaries, Cotaxé River (Braço Norte and Cricaré River (Braço Sul. Thirty-three species were identified (22 nominal and 11 morphospecies in 24 genera and five families. One genus and one species are reported for the first time from Brazil, three species from Southeastern Region of Brazil, and two species from the state. Five species and one genus not previously described were also found. Moreover, around 20% of the known species of mayfly registered from the state were found. This work reinforces the need to give more attention to research on large rivers due to the high potential for diversity, not only for Ephemeroptera, but also for other aquatic insects.

  20. Allozyme relationships in hypostomines (Teleostei: Loricariidae) from the Itaipu Reservoir, Upper Rio Paraná basin, Brazil.

    Science.gov (United States)

    Zawadzki, Cláudio Henrique; Renesto, Erasmo; dos Reis, Roberto Esser; Moura, Maurício Osvaldo; Mateus, Rogério Pincela

    2005-03-01

    In an allozyme electrophoresis survey of 15 hypostomine species from the Itaipu Hydroelectric Reservoir, 25 loci from 14 enzyme systems were scored. Allozyme data allowed recording diagnostic genetic markers for all species analyzed and for some species groups within Hypostomus, a taxon which is taxonomically still unresolved in the Upper Rio Paraná basin. The mean expected heterozygosity of the species was considerably variable and hypotheses to tentatively explain this variation are discussed. A cladogram based upon the allelic frequencies of the species analyzed was produced by the continuous maximum likelihood method: Rhinelepis aspera and M. parananus were separated from the species of Hypostominae by a long branch length. Pterygoplichthys anisitsi was the sister of all the representatives of the genus Hypostomus. Within Hypostomus, two main clades were produced: in the first, H. cochliodon was the sister of the species comprising the H. plecostomus group, and in the second, the tree showed the following relationships: (H. albopunctatus (H. regani + Hypostomus sp. 3) + (H. margaritifer (H. microstomus (Hypostomus sp. 1 (H. ternetzi + Hypostomus sp. 2)). Hypostomus ternetzi and Hypostomus sp. 2 are referred to here as representatives of the H. ternetzi group.

  1. Lower Permian stems as fluvial paleocurrent indicators of the Parnaíba Basin, northern Brazil

    Science.gov (United States)

    Capretz, Robson Louiz; Rohn, Rosemarie

    2013-08-01

    A comprehensive biostratinomic study was carried out with abundant stems from the Lower Permian Motuca Formation of the intracratonic Parnaíba Basin, central-north Brazil. The fossils represent a rare tropical to subtropical paleofloristic record in north Gondwana. Tree ferns dominate the assemblages (mainly Tietea, secondarily Psaronius), followed by gymnosperms, sphenophytes, other ferns and rare lycophytes. They are silica-permineralized, commonly reach 4 m length (exceptionally more than 10 m), lie loosely on the ground or are embedded in the original sandstone or siltstone matrix, and attract particular attention because of their frequent parallel attitudes. Many tree fern stems present the original straight cylindrical to slightly conical forms, other are somewhat flattened, and the gymnosperm stems are usually more irregular. Measurements of stem orientations and dimensions were made in three sites approximately aligned in a W-E direction in a distance of 27.3 km at the conservation unit "Tocantins Fossil Trees Natural Monument". In the eastern site, rose diagrams for 54 stems indicate a relatively narrow azimuthal range to SE. These stems commonly present attached basal bulbous root mantles and thin cylindrical sandstone envelopes, which sometimes hold, almost adjacent to the lateral stem surface, permineralized fern pinnae and other small plant fragments. In the more central site, 82 measured stems are preferentially oriented in the SW-NE direction, the proportion of gymnosperms is higher and cross-stratification sets of sandstones indicate paleocurrents mainly to NE and secondarily to SE. In the western site, most of the 42 measured stems lie in E-W positions. The predominantly sandy succession, where the fossil stems are best represented, evidences a braided fluvial system under semiarid conditions. The low plant diversity, some xeromorphic features and the supposedly almost syndepositional silica impregnation of the plants are coherent with marked dry

  2. Water quality of the Canchim?s creek watershed in São Carlos, SP, Brazil, occupied by beef and dairy cattle activities

    OpenAIRE

    Odo Primavesi; Alfredo Ribeiro de Freitas; Ana Cândida Primavesi; Haydée Torres de Oliveira

    2002-01-01

    The Canchim’s creek watershed in São Carlos, SP, Brazil, was chosen to evaluate water quality affected by dairy and beef cattle production systems based on tropical pasture. The water samples were collected monthly, during three years, at six sampling points: spring in a tropical forest, spring in an intensive dairy production system, two dam springs, and stream water upward and at the delta. Results showed differences (P

  3. Spasskyellina mandi n. sp. (Proteocephalidea: Monticelliidae, parasite of Pimelodus ornatus Kner, 1857 (Pisces: Pimelodidae of the Paraná River, Paraná, Brazil

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    Gilberto C Pavanelli

    1996-12-01

    Full Text Available Spasskyellina mandi n. sp. (Proteocephalidea: Monticelliidae is described from the Siluriform fish Pimelodus ornatus Kner, 1857, caught in the Paraná River, Paraná, Brazil. The new species differs from other species of the same genus mainly by a fewer number of testes and by a larger osmoregulatory canal. This is the second species of proteocephalidean cestode collected in P. ornatus.

  4. [Mortality associated with nosocomial infection, occurring in a general hospital of Sumaré-SP, Brazil].

    Science.gov (United States)

    Guimarães, Aline Caixeta; Donalisio, Maria Rita; Santiago, Thaiana Helena Roma; Freire, June Barreiros

    2011-01-01

    This study investigated the socio-demographic profile, clinical procedures and etiology of nosocomial infection associated with deaths in the Hospital Estadual Sumaré, state of São Paulo, Brazil, from 2007 to 2008. The retrospective study of medical records (n = 133) revealed an average of 35 days of hospitalization. Most patients (97%) underwent some invasive procedure associated with nosocomial infection (p ≤ 0.05), including: 90 (67.7%) pneumonia, 62 (46.6%), urinary infections and 97 (73%) septicemia. Infection was the leading cause of death in 75 (56.4%) cases, with defined etiology in 110 (82.7%); 34 (30.9%) because of microorganisms that were multidrug-resistant. The most common was Staphylococcus aureus (25%), related to pneumonia and blood stream infection. The monitoring of hospital infection contributed to intervention at risk situation and death.

  5. The Quantification and Identification of Land Use Change Impacts to Hydrology in Brazil from Headwater to Large Basin Scales

    Science.gov (United States)

    Levy, M. C.; Lopes, A. V.; Cohn, A.; Thompson, S. E.

    2015-12-01

    Rapid agricultural expansion and intensification has characterized the land use/cover change (LUCC) dynamics of a large region spanning the southern rainforest and savanna biomes of Brazil. Despite a plethora of modeling analyses and small-scale investigations, the cumulative effects of this transformation on hydrological processes at multiple scales remain unclear. Yet quantifying the links between LUCC and hydrological response is essential to support evidence-based sustainable development of industry, society, and environment, particularly in this region, which includes the headwaters of Brazil's major rivers, the climatically-crucial Amazon transition region, and Brazil's agricultural breadbasket. Empirical analyses that can inform land use policy in this region and are sensitive to climate, agriculture and hydrological outcomes are critically needed. This study leverages the increased availability of remotely-sensed data products and a spatially dispersed gauging network to investigate the effects of a decade of LUCC on streamflow in over 150 river basins. Using a collection of statistical techniques to identify causal relationships and isolate LUCC effects from confounding variables such as climate, we quantify the sensitivity of hydrological dynamics to LUCC from small watersheds to regional scales.

  6. Actual and future climatological budget for Taubaté, SP, Brazil

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    Andréa Sanae Horikoshi

    2007-08-01

    Full Text Available The goal of this study was to determine the actual water budget for Taubaté, SP and investigate the future water availability. The Thornthwaite-Mather (1955 method was used for the climatological water budget combined with observed and simulated data of air temperature and precipitation. The future scenarios indicate an increase of temperature (ranging from + 0.5 °C to + 2.7 °C and precipitation (ranging from 80 to 150mm. These results will provoke an increase of the water deficit (ranging from 50 to 80mm and a decrease of the surplus of water (around 200mm. The increase of the precipitation will not be sufficient to compensate for the increase of the water demands from evapotranspiration

  7. Biological control of fouling incrustation on the scallop Nodipecten nodosus (Linnaeus, 1758 cultured in Ubatuba, SP, Brazil

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    Rogerio Stojanov Bueno

    2009-12-01

    Full Text Available This experiment was developed at the marine farm of the São Paulo State Fisheries Institute in Ubatuba, SP, Brazil, aiming to compare the efficiency of three organisms (the sea urchins Echinometra lucunter, Lytechinus variegatus and the gastropod Tegula viridula in controlling fouling incrustation in lantern net and on Nodipecten nodosus valves. Scallops measuring 32.6 + 4.9mm of initial height were cultivated in eight Japanese lanterns with five floors each, at a density of 25 scallops/floor, according to the following delineament: T1 – control (scallops alone; T2 – scallops with E. lucunter; T3 – scallops with L. variegatus; T4 – scallops with T. viridula. Densities of the bio-controllers were: four (E. lucunter, three (L. variegatus and 15 animals/floor (T. viridula. The experiment was finished 150 days later and the remaining fouling in the lanterns and on the scallops valves was removed and weighed (dry weights. The sea-urchin species E. lucunter and L. variegatus were significantly more efficient in removing the lantern fouling (86% and 59% relative to the control treatment respectively, but there were no significant differences among the biocontrollers in controlling the fouling on the scallop valves. These results suggest that biological control can be helpful as an auxiliary method in scallop culture fouling removal.

  8. Cryptosporidium sp. in children suffering from acute diarrhea at Uberlândia City, State of Minas Gerais, Brazil

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    Margareth Leitão Gennari-Cardoso

    1996-10-01

    Full Text Available This study's objective was to search for Cryptosporidium sp. in diarrheic feces from children aged zero to 12 years and cared for at medical units within Universidade Federal de Uberlândia or at a private practice in Uberlândia, State of Minas Gerais, Brazil, from September 1992 to August 1993. Three fecal samples preserved in 10% formalin, were collected from 94 children. Oocyst concentration was performed through Ritchie's (modified method and staining of fecal smears for each sample (total of 1128 slides was done by the "Safranin/Methylene Blue" and the "Kinyoun (modified" techniques. The Hoffmann, Pons & Janer method was also employed to look for other enteroparasites. From 94 children, 4.26% excreted fecal Cryptosporidium oocysts. The infection seemed to vary according to age: 5.08% of patients aged zero to two years old; 33.33% of those aging eight to ten years (P>0.05. Cryptosporidium appeared in November, December and March, during the rainy season. 20.21% of the children harbored at least one enteroparasite different from Cryptosporidium, mainly Giardia intestinalis (12.77%. From Cryptosporidium infected patients, two had only this kind, another harbored Giardia intestinalis; the last one hosted Strongyloides stercoralis.

  9. Trypanosoma (Megatrypanum) lainsoni n. sp. from Mesomys hispidus (Rodentia: Echimyidae) in Brazil: trypomastigotes described from experimentally infected laboratory mice.

    Science.gov (United States)

    Naiff, Roberto Daibes; Barrett, Toby Vincent

    2013-01-01

    We report the detection, isolation and description of Trypanosoma (Megatrypanum) lainsoni n. sp. from a caviomorph rodent, Mesomys hispidus (Rodentia: Echimyidae), obtained in the Rio Negro region of the state of Amazonas, in northern Brazil. Laboratory-bred white mice (Mus musculus) and rats (Rattus rattus) were inoculated with large numbers of culture forms by intraperitoneal route, and trypomastigotes appeared in their blood 3-8 days post-inoculation. One single epimastigote was also found in Mus musculus. Similar attempts to infect Rattus norvegicus, hamsters (Mesocricetus auratus), the opossum Didelphis marsupialis, the anteater Tamandua tetradactyla and triatomine bugs were unsuccessful, following six months of observations and microscopic examinations of blood films and blood cultures. As we have found no previous record of a Trypanosoma (Megatrypanum) species naturally infecting a member of the family Echimyidae, or any other caviomorph rodent, we conclude that this is the first time such an infection has been reported. The new species is unusual in the subgenus for its infectivity to laboratory mice.

  10. Oral health and quality of life: an epidemiological survey of adolescents from settlement in Pontal do Paranapanema/SP, Brazil

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    Milene Moreira Leão

    2015-11-01

    Full Text Available This study aimed to verify oral health, treatment needs, dental service accessibility, and impact of oral health on quality of life (QL of subjects from settlement in Pontal do Paranapanema/SP, Brazil. In this epidemiological survey, 180 10-to 19- years old adolescents enrolled in the school that attend this population in settlement underwent oral examination, to verify caries index (DMFT- decayed, missing and filled teeth and periodontal condition (CPI, and were interviewed using the World Health Organization Quality of Life (WHOQOL-Bref and Oral Impact Daily Performance (OIDP instruments to evaluate QL, and the Global School-Based Health Survey (GSHS about dental service accessibility. DMFT average was 5.49 (± 3.33. Overall, 37.2% of participants showed periodontal problems, mainly CPI = 1 (77.7%. Treatment needs were mainly restorations. GSHS showed that the last dental consultation occurred > 1 year previously for 58.3% of participants at a public health center (78.9%. The average WHOQOL-Bref was 87.59 (± 15.23. Social relationships were related to dental caries and health service type. The average OIDP was 6.49 (± 9.15. The prevalence of caries was high and observed periodontal problems were reversible. The social relationships of adolescents from settlement were influenced by caries and health services type.

  11. Occurrence of aflatoxins M(1) and M(2) in milk commercialized in Ribeirão Preto-SP, Brazil.

    Science.gov (United States)

    Garrido, N S; Iha, M H; Santos Ortolani, M R; Duarte Fávaro, R M

    2003-01-01

    Aflatoxins are toxic metabolites found in foods and feeds. When ruminants eat foodstuffs containing aflatoxins B(1) and B(2), these toxins are metabolized and excreted as aflatoxin M(1) and M(2) in milk. The aim was to determine the incidence of these aflatoxins in commercial milk collected from supermarkets in Ribeirão Preto-SP, Brazil, and consisting of 60 ultrahigh temperature (UHT) milk samples and 79 pasteurized milk samples. The milk samples were analysed according to method 986.16 of AOAC International. None of the milk samples analysed were contaminated with aflatoxin M(2), and aflatoxin M(1) was detected in 29 (20.9%) of samples in the range 50-240 ng l(-1). The results show that despite a high occurrence of aflatoxin M(1) in commercial pasteurized and UHT milk sold in Ribeirão Preto in 1999 and 2000, the contamination level of these toxins could not be considered a serious public health problem according to MERCOSUR Technical Regulations. However, levels in 20.9% of the milk samples exceeded the concentration of 50 ng l(-1) permitted by the European Union. Although it is not necessary to continue monitoring the incidence and levels of aflatoxins M(1) and M(2) in milk samples, surveillance could be appropriate.

  12. Variability of the Atlantic Forest based on the EVI index and climate variables in Cunha-SP, Brazil

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    Marianna Fernandes Santana

    2016-08-01

    Full Text Available The aim of this study was to evaluate the variability of the Atlantic Forest in the municipality of Cunha-SP, Brazil, based EVI index (Enhanced Vegetation Index and climatic variables (air temperature and rainfall. Images of MOD13Q1 product from MODIS sensor, which represent the index EVI were used. The descriptive statistics and multiple were applied to climate variables and EVI for the cycle 2007/2008 (strong La Niña event. The lowest average values of the rain were found for 2008 (171.60 mm, while the highest average rainfall was found for 2007 (187.02 mm. The vegetation behaved in a manner contrary, where the lowest average EVI index was found for 2007 (0.38, already 2008 had the highest rate (0.46, respectively. The coefficient of determination between the rainfall and the EVI in 2007 (R² = 0.43 higher than in 2008 (R² = 0.12, followed by correlation indexes in 2007 (r = 0.65 and 2008 (r = 0.34. However, both indexes were low, except correlation index in 2007. In the multiple regression analysis for the year 2007 obtained 87% correlation, while in 2008 only 27%. There is no correlation between vegetation and air temperature.

  13. Ultrastructure and phylogeny of the parasite Henneguya carolina sp. nov. (Myxozoa), from the marine fish Trachinotus carolinus in Brazil.

    Science.gov (United States)

    Rocha, S; Casal, G; Garcia, P; Matos, E; Al-Quraishy, S; Azevedo, C

    2014-12-02

    Microscopic and molecular procedures are used to describe a new myxosporean species, Henneguya carolina sp. nov., found infecting the intestine of the marine teleost fish Trachinotus carolinus on the southern Atlantic coast of Brazil. Spherical to ellipsoid cysts, measuring up to ~750 µm, display synchronous development. Mature myxospores are ellipsoidal with a bifurcated caudal process. Myxospore body length, width, and thickness are 12.7 ± 0.8 (12.0-13.4) µm, 8.8 ± 0.6 (7.5-9.6) µm, and 5.8 ± 0.4 (5.0-6.4) µm, respectively; 2 equal caudal processes are 16.8 ± 1.1 (15.9-18.0) µm long, and the total myxospore length is 29.4 ± 0.8 (28.4-30.4) µm. Two pyriform polar capsules measure 5.0 ± 0.5 (4.6-5.6) × 2.4 ± 0.4 (1.9-2.9) µm, and each contains a polar filament forming 3 to 4 coils. Sporoplasm is binucleated and presents a spherical vacuole surrounded by numerous globular sporoplasmosomes. Molecular analysis of the small subunit rRNA gene by maximum parsimony, neighbor joining, and maximum likelihood reveals the parasite clustering together with other myxobolids that are histozoic in marine fish of the order Perciformes, thereby strengthening the contention that the host phylogenetic relationships and aquatic environment are the strongest evolutionary signal for myxosporeans of the family Myxobolidae.

  14. Consumo de drogas psicoativas por adolescentes escolares de Assis, SP Psychoactive drug use in school age adolescents, Brazil

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    José Luiz Guimarães

    2004-02-01

    Full Text Available Com o objetivo de quantificar o consumo das diferentes drogas psicoativas entre os estudantes da cidade de Assis, SP, e investigar as variáveis relacionadas com seu uso, foi aplicado um questionário que identificava dados sociodemográficos e padrão de uso não-médico de psicotrópicos em 20% dos estudantes das escolas públicas e privadas da cidade. Os maiores índices de consumo para o uso na vida foram os do álcool com 68,9% e o tabaco com 22,7%. As drogas mais utilizadas foram: solventes (10,0%; maconha (6,6%; ansiolíticos (3,8%; anfetamínicos (2,6%; cocaína (1,6% e anticolinérgicos (1,0%.To quantify psychoactive drug use and investigate use-related variables among students of Assis, Brazil, a questionnaire was administered to collect sociodemographic data and identify the pattern of non-medical use of psychoactive drugs in 20% of public and private school students. The largest consumption indexes for lifetime use were seen for alcohol (68.9% and tobacco (22.7%. Drugs most often used were: solvents (10.0%; marijuana (6.6%; benzodiazepines (3.8%; amphetamines (2.6%; cocaine (1.6%; and anticholinergics (1.0%.

  15. HUMAN CYCLOSPORIASIS DIAGNOSIS: REPORT OF A CASE IN SÃO PAULO, SP, BRAZIL

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    Andréia Otaviani Di Pietro Fernandes

    1998-11-01

    Full Text Available Diagnosis of the human cyclosporiasis is reported in São Paulo, SP, Brasil. Cyclospora cayetanensis has been identified in the feces of a patient by a modified Kinyoun staining method, with later sporulation in a solution of 2.5% potassium dichromate. The probability that this parasite is the eventual cause of gastrointestinal disturbances in the country was stimulated by this finding, which was arrived at by a simple technique. It had been kept in mind that the disease was expressing itself mainly among immunocompromised patients, whose number is increasing; especially in those with acquired immunodeficiency syndrome (AIDS, which is caused by the human immunodeficiency virus (HIV.É relatado o diagnóstico de ciclosporíase humana em São Paulo, SP, Brasil. Cyclospora cayetanensis foi encontrada nas fezes de um indivíduo através de exame pelo método de coloração de Kinyoun modificado, com posterior esporulação em dicromato de potássio a 2,5%. Esta verificação deve estimular a necessidade de considerar a ciclosporíase como eventual causa de distúrbios gastrointestinais no país, podendo ela ser reconhecida até mesmo por meio de técnica razoavelmente simples. Foi ainda lembrado que esta parasitose vem adquirindo expressividade sobretudo pelo fato de não raramente acometer imunodeprimidos, agora cada vez mais numerosos em especial como decorrência da infecção pelo vírus da imunodeficiência humana (HIV, que causa a síndrome da imunodeficiência adquirida (AIDS.

  16. Estimation of Sedimentary Thickness in Kachchh Basin, Gujarat Using SP Converted Phase

    Science.gov (United States)

    Chopra, Sumer; Rao, K. M.; Rastogi, B. K.

    2010-10-01

    An inexpensive method using natural earthquake data is utilized for determining the sedimentary thickness in Kachchh. The Institute of Seismological Research (ISR) is operating a network of broadband seismographs and strong motion accelerographs in Gujarat. We used data from 13 broadband seismographs and two strong motion accelerographs in the study. The stations are within 5 to 80 km from the epicenters. In this study the S-to-P converted phase, SP, is used. This phase is generated due to large impedance contrast between sediments and basement. This phase is clear in the vertical component. The difference in the travel times of S and SP phases and velocities of P and S waves is used for determining the sedimentary layer thickness. The thickness of sediments beneath each of these 15 stations was determined covering an area of 23,500 sq km.

  17. Brazil.

    Science.gov (United States)

    1985-09-01

    Brazil's population in 1985 was 135 million, with an annual growth rate (1982) of 2.3%. The infant mortality rate (1981) was 92/1000, and life expectancy stood at 62.8 years. 76% of the adult population was literate. Brazil is a federal republic which recognizes 5 political parties. 55% of the population is Portuguese, Italian, German, Japanese, African, or American Indian; 38% is white. Of the work force of 50 million, 35% are engaged in agriculture, 25% work in industry, and 40% are employed in services. Trade union membership totals 6 million. The agricultural sector accounts for 12% of the GDP and 40% of exports. Brazil is largely self-sufficient in terms of food. The GDP was US$218 billion in 1984, with an annual growth rate of 4%. Per capita GDP was US$1645. Brazil's power, transportation, and communications systems have improved greatly in recent years, providing a base for economic development. High inflation rates have been a persistent problem.

  18. Measurements and modelling of evapotransiration to assess agricultural water productivity in basins with changing land use patterns : a case study in the São Francisco River basin, Brazil

    NARCIS (Netherlands)

    Castro Teixeira, de A.H.

    2008-01-01

    Key words: Vineyards, mango, energy balance, evapotranspiration, water productivity, Bowen ratio, eddy correlation, water balance, natural vegetation, latent heat flux, sensible heat flux, biomass, water productivity, remote sensing, water management. . The São Francisco River basin in Brazil is m

  19. Mechanical Erosion in a Tropical River Basin in Southeastern Brazil: Chemical Characteristics and Annual Fluvial Transport Mechanisms

    Directory of Open Access Journals (Sweden)

    Alexandre Martins Fernandes

    2012-01-01

    Full Text Available This study aims to evaluate the mechanical erosion processes that occur in a tropical river basin, located in the São Paulo state, southeastern Brazil, through the chemical characterization of fine suspended sediments and the transport mechanisms near the river mouth, from March 2009 to September 2010. The chemical characterization indicated the predominance of SiO2, Al2O3, and Fe2O3 and showed no significant seasonal influences on the major element concentrations, expressed as oxides. The concentration variations observed were related to the mobility of chemical species. The evaluation of the rock-alteration degree indicated that the physical weathering was intense in the drainage basin. The fine suspended sediments charge was influenced by the variation discharges throughout the study period. The solid charge estimate of the surface runoff discharge was four times higher in the rainy season than the dry season. The transport of fine suspended sediments at the Sorocaba River mouth was 55.70 t km−2 a−1, corresponding to a specific physical degradation of 37.88 m Ma−1, a value associated with the mechanical erosion rate that corresponds to the soil thickness reduction in the drainage basin.

  20. Crop water parameters of irrigated wine and table grapes to support water productivity analysis in the Sao Francisco river basin, Brazil

    NARCIS (Netherlands)

    Castro Teixeira, de A.H.; Bastiaanssen, W.G.M.; Bassoi, L.H.

    2007-01-01

    Energy and water balance parameters were measured in two commercial vineyards in the semiarid region of the São Francisco river basin, Brazil. Actual evapotranspiration (ET) was acquired with the Bowen ratio surface energy balance method. The ratio of the latent heat flux to the available energy, or

  1. Modelos da distribuição temporal de chuvas intensas em Piracicaba, SP Time distribution models of intense rainfall in Piracicaba, SP, Brazil

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    Décio E. Cruciani

    2002-04-01

    Full Text Available O estudo da variação temporal de chuvas intensas é de grande importância na hidrologia, para a análise e previsão de eventos extremos, necessárias em projetos de controle de engenharia. Com esse objetivo, foram analisados dados de pluviogramas da cidade de Piracicaba, SP, do período de 1966 a 2000, para se determinar a distribuição temporal de chuvas intensas de 60 e de 120 min de duração. As chuvas de 60 min foram subdivididas em três intervalos iguais e sucessivos de 20 min cada um, enquanto as chuvas de 120 min foram subdivididas em quatro intervalos iguais e sucessivos de 30 min cada um. O modelo de distribuição da precipitação que predominou para as chuvas de 60 e 120 min, foi do tipo exponencial negativo, com 85,7 e 50,7% dos casos, respectivamente. Para as chuvas de 60 min, com altura pluviométrica média de 20,7 mm, a distribuição foi de 72,3, 21,4 e 6,2% do total precipitado, respectivamente, nos três intervalos sucessivos de 20 min. Para as chuvas de 120 min, com altura pluviométrica média de 33,3 mm, o resultado foi de 60,1, 25,2, 11,1 e 3,6%, respectivamente, nos quatro intervalos sucessivos de 30 min. O modelo de distribuição temporal dessas chuvas não foi modificado pelo total precipitado nem pela sua duração, nos intervalos em questão.Time distribution models of intense and short rains are very important in hydrology and for extreme predictions in engineering projects. With this purpose, rain data of Piracicaba, SP, Brazil, from 1966 to 2000 were analyzed to establish time distribution models of 60 and 120 min intense rains, during the rainy season from October through March. Time distribution models were assessed by three intervals of twenty minutes duration, for 60 min rains and by four intervals of thirty minutes duration for 120 min rains. The prevailing precipitation model for both, 60 and 120 min rains was a negative exponential distribution, in 85.7 and 50.7% of cases, respectively. For 60 min

  2. Brachyura (Crustacea, Decapoda associated to Schizoporella unicornis (Bryozoa, Gymnolaemata in Ubatuba bay (SP, Brazil

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    Fernando L. M. Mantelatto

    1998-01-01

    Full Text Available This work characterizes the composition of Brachyura from Schizoporella unicornis. The samples were collected in 1995 at Itaguá Beach, Ubatuba (SP, at three month intervals, during all seasons from January to December. The Bryozoa colonies were obtained by snorkeling at a depth of five meters in daylight. A total of 323 specimens were collected from four families (Xanthidae, Portunidae, Majidae and Grapsidae. Pachygrapsus transversus, Hexapanopeus schimitti, and Menippe nodifrons occurred in all seasons. The highest and lowest number of individuals occurred during the spring and autumn, respectively. Xanthidae exhibited the highest density during the summer, autumn, and spring, while Grapsidae exhibited the highest density in winter. It was noted the presence of Charibdis hellerii, an portunid from Indo-Pacific ocean. The diversity of species obtained, in addition to an accentuated number of immature and ovigerous females specimens, suggested that Schizoporella colonies were a place of reproduction and development.Este trabalho caracterizou a composição dos braquiúros em Schizoporella unicornis. As amostras foram coletadas na Praia do Itaguá, Ubatuba (SP, em intervalos de três meses, durante as estações climáticas de Janeiro a Dezembro/1995. As colônias de briozoários foram obtidas por mergulho livre, coletadas pela manhã. Um total de 323 espécimes foram coletados dentro de quatro famílias (Xanthidae, Portunidae, Majidae e Grapsidae. Pachygrapsus transversus, Hexapanopeus schimitti e Menippe nodifrons ocorreram em todas as estações. O maior e o menor número de indivíduos foram registrados na primavera e no outono, respectivamente. Xanthidae exibiu maior densidade no verão, outono e primavera, enquanto Grapsidae foi no inverno. Registrou-se a ocorrência de Charibdis hellerii, espécie originária do Indo-Pacífico. A diversidade de espécies obtida, juntamente com o acentuado número de indivíduos imaturos e fêmeas ov

  3. Geophysical evidence of crustal-heterogeneity control of fault growth in the Neocomian Iguatu basin, NE Brazil

    Science.gov (United States)

    de Castro, David L.; Bezerra, Francisco H. R.; Castelo Branco, Raimundo M. G.

    2008-11-01

    Models of fault growth propose that rift initiation starts with short fault segments. Knowledge of the growth of these segments and their interactions is important to understanding rift geometry and evolution. In the northern part of the Borborema Province, northeastern Brazil, a continental-scale, Cretaceous extensional system of faults has been observed to have reactivated ductile Precambrian shear zones. The faults form small grabens that represent the rift stage of the sedimentary basins. We integrated airborne radiometric and magnetic data with terrestrial gravity survey to investigate the influence of crustal heterogeneity on fault growth and the development of the extensional faults in one of these grabens, the Iguatu basin. Previous studies presented geophysical data, which provide evidence that the Iguatu basin contains a half-graben geometry. In our study, gravity and airborne geophysical data indicate that the basement of the Iguatu basin is part of a heterogeneous structural framework composed of two structural domains, is affected by several ductile shear zones and intruded by a few granite bodies. The gravity modeling reveals that this basin is composed of three right-bend en echelon fault segments. They form a sigmoid system of normal faults that accommodate the strong ˜90° bend of the Precambrian shear zones from E-W to roughly N-S. The growth of these segments led to the generation of two isolated depocenters. The overlapping fault segments link through relay ramps. Release faults that are nearly perpendicular or oblique to the three main fault segments form marginal strike ramps and horst structures in both depocenters. 3D-gravity modeling incorporates the presence of interfering sources of a heterogeneous structural framework. The modeling reveals a maximum sedimentary cover 1620 m thick, which occurs at the bend of the reactivated shear zones. The gravity signature of a possible granite body, after removal of the gravity effect of the basin

  4. Impact of climate change and agricultural developments in the Taquari River basin, Brazil

    NARCIS (Netherlands)

    Querner, E.P.; Jonker, R.N.J.; Padovani, C.; Soriano, B.; Galdino, S.

    2005-01-01

    The Pantanal wetland is part of the Upper Paraguay River basin. The major driving force of the wetland system is the annual oscillation between dry and wet seasons. This study focussed on the Taquari basin, a tributary of the Paraguay River, where erosion takes place and parts of the river silt up,

  5. Minilernaea floricapitella gen. nov., sp. nov. (Copepoda, Lernaeidae from freshwater fishes of Southern Brazil Minilernaea floricapitella gen. nov., sp. nov.(Copepoda, Lernaeidae de peixes de água doce do Sul do Brazil

    Directory of Open Access Journals (Sweden)

    Vernon E. Thatcher

    2005-12-01

    Full Text Available Minilernaea floricapitella gen. nov., sp. nov. (Copepoda, Cyclopoida, Lernaeidae a parasite of the freshwater fishes, Astyanax spp. and Corydoras ehrhardti Regan, 1912 of Santa Catarina and Paraná States, Brazil, is described, based on 10 postmetamorphic females. The new genus and species has the following characteristics that distinguish it from all other known lernaeids: (1 The body is very small (3.4-5.8 mm in length; (2 The head is provided anteriorly with six lobes and posteriorly with four undivided anchor arms. (3 The first pair of thoracopods is on the head, 2-4 are all on the "neck"; (4 Thoracopod 5 is reduced to a simple papillus near the genital pores; (5 The genital pores are equatorial in the hindbody and there is no pre-genital prominence. Since the head and part of the neck are inserted beneath the skin, the host produces a strong encapsulating reaction.Minilernaea floricapitella gen. nov., sp. nov. (Copepoda, Cyclopoida, Lernaeidae um parasito dos peixes, Astyanax spp. and Corydoras ehrhardti Regan, 1912 dos estados de Santa Catarina e Paraná, Brasil, é descrita baseada em 10 fêmeas pós-metamórficas. O novo gênero e espécie tem as seguintes características que servem para distingui-la dos demais lerneídeos: (1. O corpo é muito pequeno (3.4-5.8 mm de comprimento; (2 A cabeça é provida anteriormente com seis lóbulos e posteriormente com quatro âncoras não divididas; (3 O primeiro par de toracópodos encontra-se na cabeça, quando 2-4 estão no pescoço; Toracópodo 5 é reduzido a uma papila simples perto dos poros genitais; (5 Os poros genitais são localizados na área equatorial do corpo posterior e não existe uma proeminência pre-genital. Já que a cabeça e uma parte do pescoço são inseridas sob a pele, o hospedeiro demostra uma reação encapsuladora forte.

  6. The ecological dynamics of Barra Bonita (Tietê River, SP, Brazil) reservoir: implications for its biodiversity.

    Science.gov (United States)

    Tundisi, J G; Matsumura-Tundisi, T; Abe, D S

    2008-11-01

    Barra Bonita reservoir is located in the Tietê River Basin - São Paulo state - 22 degrees 29' to 22 degrees 44' S and 48 degrees 10 degrees W and it is the first of a series of six large reservoirs in this river. Built up in 1963 with the aim to produce hydroelectricity this reservoir is utilized for several activities such as fish production, irrigation, navigation, tourism and recreation, besides hydroelectricity production. The seasonal cycle of events in this reservoir is driven by the hydrological features of the basin with consequences on the retention time and on the limnological functions of this artificial ecosystem. The reservoir is polymitic with short periods of stability. Hydrology of the basin, retention time of the reservoir and cold fronts have an impact in the vertical and horizontal structure of the system promoting rapid changes in the planktonic community and in the succession of species. Blooms of Microcystis sp. are common during periods of stability. Superimposed to the climatological and hydrological forcing functions the human activities in the watershed produce considerable impact such as the discharge of untreated wastewater, the high suspended material contributions and fertilizers from the sugar cane plantations. The fish fauna of the reservoir has been changed extent due to the introduction of exotic fish species that exploit the pelagic zone of the reservoir. Changes in the primary productivity of phytoplankton in this reservoir, in the zooplankton community in the diversity and organization of trophic structure are a consequence of eutrophication and its increase during the last 20 years. Control of eutrophication by treating wastewater from urban sources, adequate agricultural practices in order to diminish the suspended particulate matter contribution, revegetation of the watershed and riparian forests along the tributaries are some possible restoration measures. Another action that can be effective is the protection of wetlands

  7. The ecological dynamics of Barra Bonita (Tietê River, SP, Brazil reservoir: implications for its biodiversity

    Directory of Open Access Journals (Sweden)

    JG. Tundisi

    Full Text Available Barra Bonita reservoir is located in the Tietê River Basin - São Paulo state - 22° 29" to 22° 44" S and 48° 10° W and it is the first of a series of six large reservoirs in this river. Built up in 1963 with the aim to produce hydroelectricity this reservoir is utilized for several activities such as fish production, irrigation, navigation, tourism and recreation, besides hydroelectricity production. The seasonal cycle of events in this reservoir is driven by the hydrological features of the basin with consequences on the retention time and on the limnological functions of this artificial ecosystem. The reservoir is polymitic with short periods of stability. Hydrology of the basin, retention time of the reservoir and cold fronts have an impact in the vertical and horizontal structure of the system promoting rapid changes in the planktonic community and in the succession of species. Blooms of Microcystis sp. are common during periods of stability. Superimposed to the climatological and hydrological forcing functions the human activities in the watershed produce considerable impact such as the discharge of untreated wastewater, the high suspended material contributions and fertilizers from the sugar cane plantations. The fish fauna of the reservoir has been changed extent due to the introduction of exotic fish species that exploit the pelagic zone of the reservoir. Changes in the primary productivity of phytoplankton in this reservoir, in the zooplankton community in the diversity and organization of trophic structure are a consequence of eutrophication and its increase during the last 20 years. Control of eutrophication by treating wastewater from urban sources, adequate agricultural practices in order to diminish the suspended particulate matter contribution, revegetation of the watershed and riparian forests along the tributaries are some possible restoration measures. Another action that can be effective is the protection of wetlands in

  8. Henneguya mbakaouensis sp. nov., Myxobolus nounensis sp. nov. and M. hydrocyni Kostoingue & Toguebaye, 1994, Myxosporea (Myxozoa parasites of centropomidae, Cichlidae and Characidae (Teleosts of the Sanaga basin in Cameroon (Central Africa

    Directory of Open Access Journals (Sweden)

    Fomena A.

    2000-09-01

    Full Text Available The study of 102 teleost freshwater fishes of Sanaga basin in Cameroon revealed the presence of three myxosporean species, among which two were new. Host fishes were of three families: Centropomidae, Cichlidae and Characidae. New species were identified as Henneguya mbakaouensis sp. nov., a gill parasite of Lates niloticus and Myxobolus nounensis sp. nov. found in the kidney and spleen of Sarotherodon galilaeus and Tilapia mariae. Myxobolus hydrocyni Kostoïngue & Toguebaye, 1994, previously described in Chad, was also found in Cameroon; complementary informations were given on that parasite which seemed to be specific to its host.

  9. Summertime thermohaline structure off the Brazil Current Region between Santos (SP and Rio de Janeiro (RJ

    Directory of Open Access Journals (Sweden)

    Edmo José Dias Campos

    1994-12-01

    Full Text Available Within the scope of the MAR-14 Project, part of the Brazil-Germany Bilateral Agreement in Marine Sciences, an oceanographic survey aboard the R/V Victor Hensen was carried out in Brazilian coastal waters between Santos (23º56'S and Rio de Janeiro (22º54'S, from January 15 to January 22,1991. In this article we report results of preliminary analyses of the hydrographic data collected with CTD, STD, Nansen bottles and XBT's. These preliminary results show intense stratification in the first 200 m depth, and the penetration of the Brazil Current deep into the continental shelf region. Two eddy-like features were detected. The first one, anticyclonic, was located in the northern part of the domain and confined to the uppermost 200 m. The second, a cyclonic vortex, was found a little to the southwest below 200 m and extending downwards to about 800 m depth. Water mass analyses based on T-S diagrams suggest that the interface between the South Atlantic Central Water (SACW and the Antarctic Intermediate Water (AIW is located at about 500 m depth. One important aspect of this study is that this was the first time a high resolution survey with a CTD probe was realized along the eastern Brasilian Coast, south of Cabo Frio.Como parte do projeto MAR-14, componente do Acordo Bilateral Brasil-Alemanha em Ciências Marinhas, uma campanha oceanógrafica a bordo do R/V Victor Hensen foi realizada em águas costeiras do Brasil entre Santos (23º56'S, de 15 a 22 de janeiro de 991. Neste artigo reportamos resultados de análises preliminares dos dados hidrográficos coletados com o auxílio de CTD, STD, garrafas de Nansen e XBT's. Esses resultados preliminares mostram uma intensa estratificação nos primeiros 200 m de profundidade, e a penetração da corrente bem adentro da região sobre a plataforma continental. Duas estruturas com características de vórtices de meso-escala foram detectadas. O primeiro, anticiclônico, estava localizado na parte norte da

  10. Epidemiological aspects of centipede (Scolopendromorphae: Chilopoda bites registered in Greater S. Paulo, SP, Brazil

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    Knysak Irene

    1998-01-01

    Full Text Available INTRODUCTION: The lack of basic knowledge on venomous arthropods and the benignity of the clinical manifestations contribute to the centipede bite victims' not being taken to a treatment reference center, leading to underestimation of the number of cases and minimizing the possibility of a broader epidemiological view. An inventory of the centipede bite occurrences in Greater S. Paulo, Brazil, and the therapeutic methods employed, by the main Brazilian medical center for the notification of poisoning by venomous animals, is presented. METHOD: All patient cards of the period 1980-1989 have been checked as to place, month and time of occurrence; sex, age, affected part of the body, signs and symptoms have been observed, as well as the therapeutic methods employed. The centipedes that caused the accidents were identified at the Arthropods Laboratory. RESULTS: It was registered 216 accidents, with a 69% predominance of the Greater S. Paulo and in only 63% of the cases (136 was the agent brought in by the victim for identification. The genera most frequently represented were Cryptops (58%, Otostigmus (33% and Scolopendra (4%. Of the 136 cases, 87% showed erythema, edema, hemorrhage, burns, cephalalgia, and intense pain. There was a predominance of accidents in the warm rainy season, in the morning and for females between 21 and 60 years of age. Hands and feet were the parts of the body most affected. The benign evolution of the clinical picture (54% made therapeutical treatment unnecessary. Only the victims of Scolopendra and Otostigmus (46% were medicated with anesthetics (51%, analgesics (25%, antihistamines and cortisone (24%. CONCLUSION: The reproductive period of the centipedes, associated with their sinanthropic habits, contributes to the greater incidence of accidents in urban areas in the warm rainy season. Only patients bitten by Scolopendra and Otostigmus require therapeutical treatment.

  11. Stable isotopes applied in life sciences in UNESP - Botucatu campus, SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Costa, Vladimir E.; Denadai, Juliana C.; Sartori, Maria M.P.; Ducatti, Carlos, E-mail: vladimir@ibb.unesp.br, E-mail: denadai@ibb.unesp.br, E-mail: mmpsartori@ibb.unesp.br, E-mail: ducatti@ibb.unesp.br [Universidade Estadual Paulista Julio de Mesquita Filho (IBB/UNESP), Botucatu, SP (Brazil). Instituto de Biociencias de Botucatu

    2013-07-01

    Universities and research centers that use stable isotopes follow a worldwide trend in owning laboratories isotope ratio that serves multiple users, as well as minimize maintenance costs, operation and staff training. For this purpose it was created in 1998, the Center Stable Isotopes 'Centro de Isotopos Estaveis' - CIE, which is an auxiliary unit linked to the Institute of Biosciences (IB) of the Sao Paulo State University - UNESP Botucatu Campus, Brazil. The best way to CIE grow and achieve excellence are already disclose the methodologies employed and practice areas consolidated to find new partnerships with different applications, and also seek new methods of analysis that can expand areas. The aim of this study is to disseminate methodologies for analysis of isotope ratio and areas of the CIE. The CIE analyzes the isotopic ratios {sup 13}C/{sup 12}C, {sup 15}N/{sup 14}N, {sup 2}H/{sup 1}H and {sup 18}O/{sup 16}O (CHON), and for the carbon samples can be solid, liquid and gas (in the form of CO{sub 2}) for the other elements is only possible to analyze in solid or liquid form. All samples are always analyzed separately by the destructive method. The CIE addition to performing scientific partnerships with all university, complementary and auxiliaries units of UNESP Botucatu campus also have partnerships in other academic units on campus of UNESP Jaboticabal and Dracena and Sao Paulo University in Piracicaba campus and is open to new partnerships in other research units. (author)

  12. Epidemiological aspects of centipede (Scolopendromorphae: Chilopoda bites registered in Greater S. Paulo, SP, Brazil

    Directory of Open Access Journals (Sweden)

    Irene Knysak

    1998-12-01

    Full Text Available INTRODUCTION: The lack of basic knowledge on venomous arthropods and the benignity of the clinical manifestations contribute to the centipede bite victims' not being taken to a treatment reference center, leading to underestimation of the number of cases and minimizing the possibility of a broader epidemiological view. An inventory of the centipede bite occurrences in Greater S. Paulo, Brazil, and the therapeutic methods employed, by the main Brazilian medical center for the notification of poisoning by venomous animals, is presented. METHOD: All patient cards of the period 1980-1989 have been checked as to place, month and time of occurrence; sex, age, affected part of the body, signs and symptoms have been observed, as well as the therapeutic methods employed. The centipedes that caused the accidents were identified at the Arthropods Laboratory. RESULTS: It was registered 216 accidents, with a 69% predominance of the Greater S. Paulo and in only 63% of the cases (136 was the agent brought in by the victim for identification. The genera most frequently represented were Cryptops (58%, Otostigmus (33% and Scolopendra (4%. Of the 136 cases, 87% showed erythema, edema, hemorrhage, burns, cephalalgia, and intense pain. There was a predominance of accidents in the warm rainy season, in the morning and for females between 21 and 60 years of age. Hands and feet were the parts of the body most affected. The benign evolution of the clinical picture (54% made therapeutical treatment unnecessary. Only the victims of Scolopendra and Otostigmus (46% were medicated with anesthetics (51%, analgesics (25%, antihistamines and cortisone (24%. CONCLUSION: The reproductive period of the centipedes, associated with their sinanthropic habits, contributes to the greater incidence of accidents in urban areas in the warm rainy season. Only patients bitten by Scolopendra and Otostigmus require therapeutical treatment.

  13. Prevalence of weight excess according to age group in students from Campinas, SP, Brazil

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    Silvia Diez Castilho

    2014-06-01

    Full Text Available OBJECTIVE: To evaluate the prevalence of weight excess in children and adolescents attending public and private schools of Campinas, Southeast Brazil, according to age group.METHODS: Cross-sectional study that enrolled 3,130 students from 2010 to 2012. The weight and the height were measured and the body mass index (BMI was calculated. The students were classified by BMI Z-score/age curves of the World Health Organization (WHO-2007 (thinness, normal weight, overweight and obesity and by age group (7-10, 11-14 and 15-18 years. Multinomial logistic regression analysis was applied to verify variables associated to overweight and obesity.RESULTS: Among the 3,130 students, 53.7% attended public schools and 53.4% were girls. The prevalence of weight excess (overweight or obesity was higher in private schools (37.3% than in public ones (32.9% and among males (37.5%, compared to females (32.7%; p<0.05. The chance of having weight excess in children aged 7-10 years was more than twice of those over 15 years old (OR 2.4; 95%CI 2.0-3.0 and it was 60% higher for the group with 11-14 years old (OR 1.6; 95%CI 1.3-2.0. The chance of being obese was three times higher in 7-10 years old children than in the adolescents with 15-18 years old (OR 4.4; 95%CI 3.3-6.4 and 130% higher than the group with 11-14 years old (OR 2.3; 95%CI 1.6-3.2.CONCLUSIONS: The prevalence of weight excess in Campinas keeps increasing at an alarming rate, especially in the younger age group.

  14. Impact of the reservoir of Paraibuna Hydroelectric Power Plant, SP, Brazil

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    Suely Franco Siqueira Lima

    2010-12-01

    Full Text Available Artificial reservoirs for hydroelectric power plants cause significant environment and social changes. This paper describes the construction of a geospatial database with information on the impacts caused by the Paraibuna hydroelectric power plant since its construction. CBERS-2 and Landsat 5 and 7 images were included in the database, and then, analyzed to provide information on land cover and land use for a period of 31 years. Information provided by São Paulo Energy Company (CESP and the Paraíba do Sul Water Basin Management Association (AGEVAP was integrated into this database. Interactive database queries allow the assessment of changes in the local economy around the reservoir, changes in land cover, loss of historical and environmental assets and also the actions of the energy company to minimize the plant and reservoir impacts. This database provides information that helps analyzing the potential and limits of Paraibuna Power Plant and addresses the impacts to the natural landscape and to the social and economic resources of the affected region.

  15. Quaternary colluvial episodes (Upper Paraná River Hydrographic Basin, Brazil

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    Alethea E.M. Sallun

    2010-09-01

    Full Text Available Colluvial deposits occur extensively in the Upper Paraná River Hydrographic Basin (UPRHB in Southeastern,Southern, and Western central Brazil. These deposits were recognized as an allostratigraphic unit and related to creeping during the Quaternary. Every studied colluvial profile is homogeneous, which indicates relatively long periods of landscape stability that is sufficient for the development of a thick soil cover. The deposits were dated by luminescence and indicate periods of more intense colluvial deposition between 6 and 220 ky B.P. These events correspond approximately to the transitions between the oxygen isotope stages 2-3-4 and 5-6, suggesting that this aggradation was influenced by climatic changes. However, the most important alluviation episode was tentatively correlated with the Middle to Upper Pleniglacial of the Wisconsin glaciation. The most intensive and frequent periods of precipitation that occurred during climate transitions are probably correlated with aggradation events. The regularity of the colluvial deposits suggests continuous uplift accompanied by sediment deposition throughout the UPRHB due to neotectonic activity during the last million years.Depósitos coluviais ocorrem extensivamente na Bacia Hidrográfica do Alto Rio Paraná, no sudeste, sul e centro-oeste do Brasil. Esses depósitos foram reconhecidos como uma unidade aloestratigráfica, e são interpretados como depósitos formados por processos de rastejo durante o Quaternário. Cada perfil coluvial estudado é muito homogêneo, e indica relativamente períodos longos de estabilidade da paisagem, suficiente para desenvolvimento de espessa cobertura. Estes depósitos foram datados por luminescência para estabelecer cronologicamente períodos de deposição coluvial mais intensa entre 6 e 220 ky B.P. Estes eventos correspondem aproximadamente às transições entre os estágios de isótopos do oxigênio 2-3-4 e 5-6, sugerindo que essa agradação esteve

  16. Mercury in sediments from shelf and continental slope at Campos Basin near Rio de Janeiro, Brazil

    Science.gov (United States)

    Araujo, Beatriz; Hintelmann, Holger; Dimock, Brian; Gomes de Almeida, Marcelo; Falcão, Ana Paula; de Rezende, Carlos Eduardo

    2016-04-01

    Mercury (Hg) is a global pollutant due to its ability to undergo long-range transport from source regions to remote parts of the world, and its ubiquitous presence in aquatic ecosystems. The Hg isotope ratios could be an effective tool for tracing the sources and process of Hg in the environment. This study aimed to establish the distribution of mercury in surface sediments of three transects (25- 3000m water depth) in continental shelf and slope in Campos Basin-RJ-Brazil, using the Hg isotopes to understand the geochemical processes relating to Hg cycling that occur in a subtropical coastal environment. The study area was divided into three transects: A (located to the south and close to a upwelling area), D (located opposite the mouth of the Paraiba do Sul River) and I (located north near the top of Vitória-ES). Sampling isobaths were 25, 50, 75, 100, 150, 400, 700, 1000, 1300, 1900, 2500 and 3000m. The Total Hg, MMHg and Hg stable isotopes were determined based on EPA Method 1631, EPA method 1630 and Foucher and Hintelmann (2006), respectively. The silt/clay ranged from 0.05 to 95%, and the organic carbon (OC) from 0.07 to 1.43 % for all transects. THg and MMHg concentrations in the shelf were 11.9 ± 7.2 (1.7- 22.2) ng.g-1 and 0.15 ± 0.12 (0.02 - 0.40) ng.g-1; in the slope 30.3 ± 9.2 (11.6 - 51.6) ng.g-1 and 0.13 ± 0.06 (0.03 -0.29) ng.g-1 , respectively. The δ202Hg and Δ199Hg varied from -0.32 to -1.85 ‰ (-0.79 ± 0.44‰) and -0.41 to 0.09 ‰ (-0.03 ± 0.12 ‰) for all transects, respectively. The delta values between both regions are significantly different, the shelf region showed δ202Hg from -0.59 to -2.19 ‰ (mean: -1.52 ±0.65) and Δ199Hg from - 0.53 to 0.08 ‰ (mean: -0.27 ±0.55) and the slope region were observed δ202Hg values from -0.32 to -1.82 ‰ (mean: -0.73 ±0.39 ‰ n=18) and gΔ199Hg from -0.23 to 0.09‰ (mean: -0.02 ±0.08‰ n=5). The slope appears to be enriched with heavier isotopes compared to the shelf, however, in the

  17. Hot Chemistry Laboratory decommissioning activities at IPEN/CNEN-SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Camilo, Ruth L.; Lainetti, Paulo E.O. [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)], e-mail: rcamilo@ipen.br, e-mail: lainetti@ipen.br

    2009-07-01

    IPEN's fuel cycle activities were accomplished in laboratory and pilot plant scale and most facilities were built in the 70-80 years. Nevertheless, radical changes of the Brazilian nuclear policy in the beginning of 90's determined the interruption of several fuel cycle activities and facilities shutdown. Since then, IPEN has faced the problem of the pilot plants decommissioning considering that there was no experience/expertise in this field at all. In spite of this, some laboratory and pilot plant decommissioning activities have been performed in IPEN in the last years, even without previous experience and training support. One of the first decommissioning activities accomplished in IPEN involved the Hot Chemistry Laboratory. This facility was built in the beginning of the 80's with the proposal of supporting research and development in the nuclear chemistry area. It was decided to settle a new laboratory in the place where the Hot Chemistry Laboratory was installed, being necessary its total releasing from the radioactive contamination point of view. The previous work in the laboratory involved the manipulation of samples of irradiated nuclear fuel, besides plutonium-239 and uranium-233 standard solutions. There were 5 glove-boxes in the facility but only 3 were used with radioactive material. The glove-boxes contained several devices and materials, besides the radioactive compounds, such as: electric and electronic equipment, metallic and plastic pieces, chemical reagents, liquid and solid radioactive wastes, etc. The laboratory's decommissioning process was divided in 12 steps. This paper describes the procedures, problems faced and results related to the Hot Chemistry Laboratory decommissioning operations and its reintegration as a new laboratory of the Chemical and Environmental Technology Center (CQMA) - IPEN-CNEN/SP. (author)

  18. Hydrological and environmental analysis of the Pirajibu-Mirim watershed, Sorocaba, SP, Brazil

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    Carina Júlia Pensa Corrêa

    2016-11-01

    Full Text Available The watershed of the Pirajibu-Mirim River, in Sorocaba-SP, contributes to production and the municipal water supply, and is located in a high-priority region for the implementation of a Payment for Environmental Services (PES program. In this context, this study aimed to evaluate the conservation of its water springs and environmental compliance with the legislation of Permanent Preservation Areas (PPAs. A macroscopic diagnosis of the water springs was therefore made in the field in order to subsequently classify their condition. The assessment of environmental compliance with the PPAs was performed with the aid of RapidEye (2014 satellite images and the Quantum GIS 1.6 program. The results indicated that water quality stands out positively, while the land use and occupation of the springs areas showed negative results. No water spring is located in protected areas and only one was found on an agricultural farm; none had signs indicating its presence. Most of them show evidence of human disturbance, such as degradation of vegetation and garbage dumping. The evaluation of environmental compliance demonstrated that 30.7% of the PPAs lack adequate vegetative cover, and thus may potentially be included in an intervention program for recovery due to degradation. The profile analysis of the properties that have water springs indicated the predominance of lands without any commercial use that included recreational country houses. The work indicated some environmental and socioeconomic characteristics of the watershed that can support public policy for the conservation of water resources in the region, if considered in the establishment of a PSA program.

  19. Foraging behavior of Melipona rufiventris Lepeletier (Apinae; Meliponini in Ubatuba, SP, Brazil

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    AO. Fidalgo

    Full Text Available This study describes how the foraging activity of Melipona rufiventris is influenced by the environment and/or by the state of a colony. Two colonies were studied in Ubatuba, SP (44° 48’ W and 23° 22’ S from July/2000 to June/2001. These colonies were classified as strong (Colony 1 and intermediate (Colony 2 according to their general conditions: population and brood comb size and number of food pots. The bees were active from dawn to dusk. The number of pollen loads presented a positive correlation with relative humidity (r s = 0.401; p <0.01 and was highest between 70 and 90%. However, it was negatively correlated with temperature (r s = -0.228; p <0.01 showing a peak between 18 and 23 °C. The number of nectar loads presented a positive correlation with temperature (r s = 0.244; p <0.01 and light intensity (r s = 0.414; p <0.01; it was greater between 50 and 90% of relative humidity and 20 and 30 °C of temperature. They collected more nectar than pollen throughout the day, and were more active between 6 and 9 hours. Workers from Colony 1 (strong collected nectar in greater amounts and earlier than those from Colony 2 (intermediate. The number of pollen, nectar and resin loads varied considerably between the study days. Peaks of pollen collection occurred earlier in months with longer days and in a hotter and more humid climate. The foraging behavior of M. rufiventris is probably affected by the state of the colony and by environmental conditions, notably temperature, relative humidity, light intensity and length of the day.

  20. Demographic and socioeconomic conditions associated with food insecurity in households in Campinas, SP, Brazil

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    Bruna Fernanda do Nascimento Jacinto de SOUZA

    Full Text Available ABSTRACT Objective: To evaluate the association of food insecurity with demographic and socioeconomic conditions in households in Campinas, São Paulo state, Brazil. Methods: This is a cross-sectional study conducted on a representative sample of the urban population of the Southern, Southwestern, and Northwestern Health Districts of Campinas, between 2011-2012. Characteristics of the head of household, family history and household patterns were investigated. The dependent variable was food security condition, categorized as food security, mild food insecurity, and moderate/severe food insecurity. All independent variables with p-value <0.20 in the bivariate multinomial logistic regression were included in the final model of multiple multinomial logistic regression, adjusted to household head age; the remaining variables had p-value <0.05. Results: In the 691 households analyzed, there was 65% of food security, 27.9% of mild food insecurity, and 7.1% of moderate/severe food insecurity. The conditions associated with mild food insecurity were monthly per capita income less than the minimum wage, household head unemployed for more than six months between 2004-2010, living in properties given to the family/occupied/other, and density higher than two people per bedroon. The moderate/severe food insecurity was associated with informal employment condition of the household head and the presence of a beneficiary of the Bolsa Família (Family Allowance Program, a cash transfer-type program, in the household. The higher the score of the consumer goods, the lower the probability of mild food insecurity or moderate/severe food insecurity. There was a higher probability of mild food insecurity and moderate/severe food insecurity in unfinished masonry-built houses/other. Conclusion: More than one third of the households investigated experienced some form of food insecurity. Mild food insecurity was associated with demographic conditions, while moderate

  1. A new species of Microglanis (Siluriformes: Pseudopimelodidae from upper rio Paraná basin, Brazil

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    Oscar Akio Shibatta

    Full Text Available Microglanis garavelloi, new species, collected in tributaries of rio Paranapanema and rio Tietê, is the first species of the genus described from upper rio Paraná basin. The new species can be distinguished from other species of Microglanis on morphometric characters, color pattern, caudal-fin shape, pectoral-spine morphology and lateral line development. Characters used specifically to distinguish M. garavelloi from M. cottoides (laguna dos Patos and rio Uruguay basins and M. parahybae (rio Paraíba do Sul basin include morphometrics, color pattern and pectoral-spine serration.

  2. A new species of the catfish genus Centromochlus (Siluriformes: Auchenipteridae: Centromochlinae from the upper rio Paraná basin, Brazil

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    Luisa Maria Sarmento-Soares

    Full Text Available Centromochlus comprises twelve species, distributed in the main inland watersheds of South America, including the Orinoco, Essequibo, coastal rivers of Suriname, Amazon, upper Paraná and São Francisco basins. The new species is described from the upper rio Paraná based on material collected in 1965 during the construction of the UHE Ilha Solteira, São Paulo, Brazil. The new species is easily distinguished from all congeners due to absence of adipose fin, a condition otherwise restricted to Gelanoglanis nanonocticolus, among centromochlin catfishes. The new species comprises small catfishes (adults ranging from 35 to 39 mm SL, in which modified anal fin of males is devoid of denticulations or spines, and most posterior rays reduced in length. In addition, Tatia simplex Mees is transferred to Centromochlus and its generic reassignment discussed.

  3. Two new species of the Hypostomus cochliodon group (Siluriformes: Loricariidae from the rio Negro basin in Brazil

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    Pedro Hollanda Carvalho

    Full Text Available Two new species of Hypostomus are described from the middle and upper rio Negro in Brazil. They are assigned to the Hypostomus cochliodon group (sensu Armbruster, 2003 by possessing few spoon-shaped teeth, and dentary angle averaging less than 80º. Hypostomus kopeyaka is described from the rio Tiquié, a tributary of the rio Uaupés, upper rio Negro basin, presents a unique color pattern among the Hypostomus species belonging to the Hypostomus cochliodon group, consisting of conspicuously horizontally elongated, closely-set black spots over the entire dorsal and lateral surfaces of the body. Hypostomus weberi is described from the middle rio Negro and can be distinguished from all remaining Hypostomus species belonging to the Hypostomus cochliodon group by possessing a unique color pattern consisting in large, rounded, widelyspaced black spots over body and fins.

  4. Occurrence of female sexual hormones in the Iguazu river basin, Curitiba, Paraná State, Brazil

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    Karina Scurupa Machado

    2014-02-01

    Full Text Available Female sexual hormones have attracted the attention of the scientific community due to the effects that they cause by interfering in the endocrine system. Many contemporary studies have sought to monitor some of the main female sexual hormones in surface waters in Brazil. Current article evaluates the presence of 17β-estradiol, 17α-ethinylestradiol, estrone and progesterone in the surface waters of Curitibaand the surrounding metropolitan area in the state of Paraná, Brazil, by high-performance liquid chromatography (HPLC, performed at 7 different sites. The study revealed that a range of concentrations between 0.07 and 13.45 µg L-1 of female sexual hormones was extant; higher values than these were found in other regions ofBrazil and in other countries. Higher concentrations have been attributed to the region´s sanitation due to large sewage amounts. Sewage discharge has also been confirmed by results of limnological parameters.

  5. The zooplankton biodiversity of some freshwater environments in Parnaíba basin (Piauí, Northeastern Brazil

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    JDN. Paranhos

    Full Text Available The plankton fauna of the state of Piauí, Northeastern Brazil, especially in the Parnaíba basin, is still poorly known; the results of most studies of the subject have not been published and can only be found in grey literature (unpublished scientific works, such as course completion work and consulting reports. Thus, this paper presents data from samples taken recently from different water bodies in Piauí and represents the second study to be published on the region's zooplankton since the pioneering work of Spandl (1926. A total of 38 species were recorded, including 23 new occurrences of rotifers, 10 of cladocerans and 2 of copepods for the state of Piauí. The greatest richness was observed for the rotifers, of which the genus Brachionus must be highlighted, especially at the Joana reservoir. Among the crustaceans, the greatest richness was observed at the Bezerra reservoir, where cladocerans of the genus Bosmina were prominent. The rotifers Brachionus havanaensis Rousselet, 1911 and Filinia longiseta (Ehrenberg, 1834; the cladocerans Diaphanosoma spinulosum Herbst, 1967 and Moina micrura Kurz, 1874; and the copepods Notodiaptomus cearensis Wright, 1936 and Thermocyclops decipiens Kiefer, 1927 occurred in all or in most environments in which the respective groups were studied. The results presented here expand the taxonomic list of zooplankton for the state of Piauí, including a total fauna of 30 species of rotifers, 15 of cladocerans and 3 of copepods. The zooplankton richness was considered low in the studied reservoirs compared to other freshwater ecosystems from Northeastern Brazil; however, the few studies developed in the Parnaíba basin suggest that the diversity for these organisms should be higher.

  6. Patterns of Woody Growth for Brazilian Savanna (Cerrado) Trees in the Cuiaba Basin and Pantanal of Mato Grosso, Brazil

    Science.gov (United States)

    Zappia, A. J.; Vourlitis, G. L.; Pinto-Jr, O. B.

    2015-12-01

    The Brazilian savanna, locally known as cerrado, is a major ecosystem that covers a vast majority of central Brazil. Little is known about how woody growth within the cerrado is affected by soil properties such as texture and/or nutrient availability. Thus, in this study we assessed the relationship between woody growth and soil properties in the Cuiaba Basin and Pantanal of Mato Grosso, Brazil. We sampled 4-5 vegetation stands in each site that varied in hydrology, soil type, and vegetation composition and structure, and measured diameter at breast height, wood density, and soil nutrient concentration and physical properties every 5-10 m along a 100 m long transect. We hypothesized that as tree diameter at breast height increases, annual tree growth rate will decrease and that woody carbon (C) storage will increase as a function of soil nutrient availability. Our preliminary data support our hypotheses. Tree growth rates declined with tree size in both the Cuiaba Basin and the Pantanal. Rates of woody C storage, both on a per tree basis (kgC tree-1 year-1) and on a per unit ground area basis (kgC m-2 year-1) were significantly positively correlated with soil extractable phosphorus (P), calcium (Ca), and clay content, while only woody C storage on a per tree basis was positively correlated with potassium (K), magnesium (Mg), and cation exchange capacity (CEC). These data suggest that rates of woody C storage in cerrado are nutrient limited, while correspondence between C storage and soil physical properties could indicate both nutrient and water limitations to C storage.

  7. The zooplankton biodiversity of some freshwater environments in Parnaíba basin (Piauí, Northeastern Brazil).

    Science.gov (United States)

    Paranhos, J D N; Almeida, V L S; Silva Filho, J P; Paranaguá, M N; Melo, M; Neumann-Leitão, S

    2013-02-01

    The plankton fauna of the state of Piauí, Northeastern Brazil, especially in the Parnaíba basin, is still poorly known; the results of most studies of the subject have not been published and can only be found in grey literature (unpublished scientific works), such as course completion work and consulting reports. Thus, this paper presents data from samples taken recently from different water bodies in Piauí and represents the second study to be published on the region's zooplankton since the pioneering work of Spandl (1926). A total of 38 species were recorded, including 23 new occurrences of rotifers, 10 of cladocerans and 2 of copepods for the state of Piauí. The greatest richness was observed for the rotifers, of which the genus Brachionus must be highlighted, especially at the Joana reservoir. Among the crustaceans, the greatest richness was observed at the Bezerra reservoir, where cladocerans of the genus Bosmina were prominent. The rotifers Brachionus havanaensis Rousselet, 1911 and Filinia longiseta (Ehrenberg, 1834); the cladocerans Diaphanosoma spinulosum Herbst, 1967 and Moina micrura Kurz, 1874; and the copepods Notodiaptomus cearensis Wright, 1936 and Thermocyclops decipiens Kiefer, 1927 occurred in all or in most environments in which the respective groups were studied. The results presented here expand the taxonomic list of zooplankton for the state of Piauí, including a total fauna of 30 species of rotifers, 15 of cladocerans and 3 of copepods. The zooplankton richness was considered low in the studied reservoirs compared to other freshwater ecosystems from Northeastern Brazil; however, the few studies developed in the Parnaíba basin suggest that the diversity for these organisms should be higher.

  8. Tectonic-stratigraphic evolution of Cumuruxatiba Basin - Brazil; Evolucao tectono-estratigrafica da Bacia de Cumuruxatiba

    Energy Technology Data Exchange (ETDEWEB)

    Lobato, Gustavo; Fernandes, Flavio L.; Silva, Eric Zagotto; Ferreira Neto, Walter Dias [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Modelagem Multidisciplinar de Bacias Sedimentares; Ribeiro, Juliana [Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP), Brasilia, DF (Brazil)

    2008-07-01

    In recent years, the exploratory interest on Cumuruxatiba Basin has been inconstant, with modest discoveries of oil. Aiming to deepen the geological knowledge of the basin and in order to attract the interest of oil companies, the ANP (National Agency of Petroleum, Natural Gas and Biofuels) signed contract with COPPE/UFRJ for carrying out an analysis basin project. The project was developed by the Basin Analysis Multidisciplinary Modeling Laboratory (Lab2M/UFRJ) in the period 2006/2007, and was with the main objective outline the main structural and seismo-stratigraphic features of the basin, and in an integrated and multidisciplinary way, build a model of its sedimentation and tectono-stratigraphic evolution. This paper presents the results of the regional seismic mapping, aided by well and potential methods data. The stratigraphic succession the basin has been divided into genetic units (UN-B, UN-C e UN-D) corresponding to second order depositional sequences, they are: UN-B, corresponding by a rift and sag-rift siliciclastic deposits, plus the Aptian evaporitic deposits; UN-C, characterized by carbonatic deposits, and shelf related sediments; and UN-D, corresponding by a final transgressive (siliciclastic) - regressive (mix) cycle, between Cenomanian and actual days. (author)

  9. Vegetation coverage in hydrographic basins in the central region of the State of São Paulo, Brazil.

    Science.gov (United States)

    Bertini, M A; Fushita, A T; Lima, M I S

    2015-08-01

    Vegetation coverage can be inappropriately used, especially in the absence of proper planning, and can result in a reduction of the occupied area. Demographic and economic alterations are factors that contribute to the degradation of vegetation coverage in landscape units. In addition, because vegetation is essential for protection of recharge areas in aquifers, the fragmentation of habitats in hydrographic basins causes changes in climate temperature, soil erosion, eutrophication, and siltation of watercourses. This study analyzed the vegetation coverage from the municipality of São Carlos, State of São Paulo (SP) to assess the environmental quality of water resources in the hydrographic basins and sub-basins, in the Guarani Aquifer System. The vegetation coverage was analyzed in three scales: municipality, Hydric Resource Management Units (UGRHIs), and hydrographic sub-basins based on map overlapping from the LAPA/UFSCar Digital Cartographic Collection and visual interpretation of LANDSAT 5, TM sensor, Path 220, row 075 on satellite images. The municipality of São Carlos has vegetation coverage of 31,776.4 hectares, in which 57% is classified as preserved vegetation typology, and 58% is over the Guarani aquifer recharge area. The vegetation coverage with savannas, riparian forests, and mesophyll forests represented 28% of the total studied area and is located over 28.3% of the Guarani aquifer recharge area extension. The Permanent preservation areas (PPAs) represent 21.6% of the total vegetation coverage with 51% of it being vegetated. The municipality has a total of 686 springs (Topographic maps of IBGE, escale 1:50,000) distributed on an average of 60 springs per km2; 40% of these are protected by vegetation.

  10. Odontesthes mirinensis, sp.n. um novo peixe-rei (Pisces, Atherinidae, Atherinopsinae para o extremo sul do Brasil Odontesthes mirinensis, sp.n. a new silverside (Pisces, Atherinidae, Atherinopsinae from southern Brazil

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    Marlise de Azevedo Bemvenuti

    1995-01-01

    Full Text Available Odontesthes mirinensis, a new species of silverside, is described in coastal lagoons system of Rio Grande do Sul, Brazil. The new species is distinguished from other Odontesthes species by short snout and having 24-29 gill rakers on the lower branch of the first branchial arch. Osteological features (bones of the skull, axial skeleton and girdles are included and discussed. Meristic and morphometric variables were analyzed separately, through multivariate procedures. Principal Component Analysis show that Odontesthes mirinensis, sp.n. does not exhibit significant geographic variation on body shape.

  11. Ocorrência de Herminodes sp. (Lepidoptera: Noctuidae em pupunheira nos estados do Acre e Rondônia, Brasil Occurrence of Herminodes sp. (Lepidoptera: Noctuidae in peach palm in the States of Acre and Rondônia, Brazil

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    Marcílio José Thomazini

    2004-09-01

    Full Text Available É relatado a ocorrência de Herminodes sp. em plantas de pupunha na área experimental da Embrapa Acre, Rio Branco, AC e no Projeto Reca, Vila Nova Califórnia, RO, Brasil. São descritas as principais características deste inseto e os danos por ele causados. Este é o primeiro registro de lagartas do gênero Herminodes causando dano em pupunheiras nos estados do Acre e Rondônia.Related herein is the occurrence of Herminodes sp. in peach palm plants at experimental area of Embrapa Acre, Rio Branco, AC and at Projeto Reca, Vila Nova California, RO, Brazil. The main characteristics of this insect and the damage it causes are described. This is the first record of Herminodes caterpillars damaging peach palm in the states of Acre and Rondônia.

  12. Fauna Triatominae do Estado de Bahia, Brasil.V - Microtriatoma pratai sp. n. Hemiptera, Reduviidae, Triatominae, Bolboderini Triatomidae fauna of the State of Bahia, Brazil. V - Microtriatoma pratai sp. n. - Hemiptera,Reduviidae, Triatominae, Bolderini

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    Ítalo A. Sherlock

    1982-06-01

    Full Text Available Microtriatoma pratai sp. n. de Hemíptera, Reduviidae, Triatominae, Bolboderini, é descrita no presente trabalho com base em um exemplar coletado em domicílio da cidade do Salvador, Estado da Bahia, Brasil. A espécie se distingue facilmente das outras conhecidas do gênero, principalmente por apresentar asas sem manchas e conexivo com largas manchas claras e escuras alternadas.Microtriatoma pratai n. sp. (Hemíptera, reduviidae, Triatominae, Bolboderini is described from a single specimen collected inside a house in the city of Salvador, State of Bahia, Brazil. This species is easily distinguished from the others belonging to the genus principally by the existence of alternating broad light and dark coloured spots on the connexivum and the absence of spots on the hemelytra.

  13. Novas citações de Chytridiomycota e Oomycota para o Parque Estadual das Fontes do Ipiranga (PEFI, SP, Brasil New records of Chytridiomycota and Oomycota from the "Parque Estadual das Fontes do Ipiranga (PEFI", SP, Brazil

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    Carmen Lidia Amorim Pires-Zottarelli

    2007-03-01

    Full Text Available Levantamento de fungos zoospóricos realizado em lagos artificiais do Parque Estadual das Fontes do Ipiranga (PEFI, situado na cidade de São Paulo, Estado de São Paulo, Brasil, resultou no isolamento de 41 táxons, sendo 36 identificados em nível específico. Vinte e três táxons pertencem ao Reino Fungi, filo Chytridiomycota, ordens Chytridiales, Monoblepharidales e Spizellomicetales e, 18 ao Reino Straminipila, filo Oomycota, ordens Saprolegniales e Peronosporales. Dentre os fungos isolados, 14 são mencionados pela primeira vez para o PEFI: Aphanomyces helicoides von Minden, Catenochytridium kevorkianii Sparrow, Catenochytridium sp., Chytriomyces appendiculatus Karling, C. aureus Karling, C. hyalinus Karling, C. spinosus Fay, Diplophlyctis asteroidea Dogma, D. complicata (Willoughby Dogma, Karlingia dubia Karling, Nowakowskiella hemisphaerospora Shanor, Saprolegnia australis Elliott, Septochytrium variabile Berdan e Truittella sp., os quais são descritos, comentados e ilustrados. O gênero Truitella é mencionado pela primeira vez para o Brasil.A survey of zoosporic fungi from artificial lakes of the Fontes do Ipiranga State Park, in the city of São Paulo, São Paulo State, Brazil, yielded the isolation of 41 taxa with 36 species. Twenty-three taxa belong to Chytridiales, Monoblepharidales and Spizellomycetales of the Phylum Chytridiomycota, Fungi Kingdom and 18 belong to Saprolegniales and Peronosporales, Phylum Oomycota, Straminipila Kingdom. Of these, 14 are first-time records for this State Park: Aphanomyces helicoides von Minden, Catenochytridium kevorkianii Sparrow, Catenochytridium sp., Chytriomyces appendiculatus Karling, C. aureus Karling, C. hyalinus Karling, C. spinosus Fay, Diplophlyctis asteroidea Dogma, D. complicata (Willoughby Dogma, Karlingia dubia Karling, Nowakowskiella hemisphaerospora Shanor, Saprolegnia australis Elliott, Septochytrium variabile Berdan and Truittella sp., which are described, commented and

  14. Ocorrência de Taenia sp. na população atendida no laboratório central do Instituto Adolfo Lutz, São Paulo, SP, Brasil (1960/1989 Occurrence of Taenia sp. in the population attended in the central laboratory of "Instituto Adolfo Lutz", São Paulo, SP, Brazil (1960/1989

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    Rosa Maria Donini Souza Dias

    1991-04-01

    Full Text Available Foram examinados retrospectivamente os relatórios mensais e anuais da Seção de Enteroparasitoses do Laboratório Central do Instituto Adolfo Lutz, São Paulo, SP, do período de 1960 a 1989, perfazendo uma série histórica de 30 anos, com 1.519.730 exames protoparasitológicos e 355 identificações de proglotes de Taenia. Pelo método da sedimentação espontânea foram diagnosticados 7.663 (0,5% casos de presença de ovos de Taenia sp. nas fezes. Das 355 proglotes enviadas para identificação, 311 (87,60% estavam em condições de serem especificadas, e dessas, 273 (87,80% eram proglotes de Taenia saginata e 38 (12,22% de T. solium.Monthly and yearly reports of the Seção de Enteroparasitoses of the Instituto Adolfo Lutz (São Paulo, SP, Brazil from 1960 to 1989 with 1,519,730 parasitological stool examinations were studied. There were also 355 identifications of Taenia sp. proglottids. Using HOFFMAN, PONS & JANER's method, 7,663 (0.5% cases of taeniasis were diagnosed, and 311 (87.60% of the 355 proglottids were on easy terms to be specified, 273 (87.80% of them were from Taenia saginata.

  15. The role of environmental land use conflicts in soil fertility: A study on the Uberaba River basin, Brazil.

    Science.gov (United States)

    Valera, C A; Valle Junior, R F; Varandas, S G P; Sanches Fernandes, L F; Pacheco, F A L

    2016-08-15

    In the Uberaba River basin (state of Minas Gerais, Brazil), pastures for livestock production have invaded areas of native vegetation (Cerrado biome), while already existing pastures were invaded by crop agriculture, with an expansion of sugar cane plantations in the most recent years. In some areas of the basin, these land use changes were classified as environmental land use conflicts because the new uses were not conforming to land capability, i.e. the soil's natural use. Where the areas in conflict became dense, some soil properties have changed significantly, namely the organic matter content and the exchangeable potassium concentration, which have decreased drastically (5kg/m(3) per 10% increase in the conflict area) threatening the fertility of soil. Besides, these changes may have triggered a cascade of other environmental damages, specifically the increase of soil erosion and the degradation of water quality with negative impacts on aquatic biodiversity, related to a disruption of soil organic matter structural functions. Because half the Uberaba catchment has been considered is a state of accentuated environmental degradation, not only caused by environmental land use conflicts, conservation measures have been proposed and requested for immediate implementation across the watershed.

  16. Spectroscopic analysis and X-ray diffraction of trunk fossils from the Parnaíba Basin, Northeast Brazil.

    Science.gov (United States)

    Alencar, Wemerson J; Santos, F Eroni P; Cisneros, Juan C; da Silva, João H; Freire, Paulo T C; Viana, Bartolomeu C

    2015-01-25

    The Parnaiba Sedimentary Basin is of the Paleozoic age and is located in Northeast Brazil, covering the states of Piauí, Maranhão and Tocantins and a small part of Ceará and Pará. In this work we applied several chemical analytical techniques to characterize trunk fossils found in the Parnaíba Sedimentary Basin, collected from four different sites, and discuss their fossilization process. We performed a study of the trunk fossils through X-ray diffraction, energy dispersive spectroscopy, infrared and Raman spectroscopy. The analysis allow us to identify the different compositions which are present in the trunk fossils: kaolinite (Al2Si2O5(OH)4), hematite (Fe2O3) and quartz (SiO2). Based in these results we were able to identify that the main fossilization mechanism of the trunk fossil was silicification. Furthermore, through Raman spectroscopy, we have observed the presence of carbonaceous materials in the Permian fossils, as evidenced by the D and G Raman bands. The relative intensities and bandwidths of the D and G bands indicated that the carbon has a low crystallinity. Thus, most of trunk fossils analyzed were permineralized and not petrified, because there is the presence of carbon that characterizes the partial decomposition of the organic matter in some trunks.

  17. Dinosaur ichnofauna of the Upper Jurassic/Lower Cretaceous of the Paraná Basin (Brazil and Uruguay)

    Science.gov (United States)

    Francischini, H.; Dentzien–Dias, P. C.; Fernandes, M. A.; Schultz, C. L.

    2015-11-01

    Upper Jurassic and Lower Cretaceous sedimentary layers are represented in the Brazilian Paraná Basin by the fluvio-aeolian Guará Formation and the Botucatu Formation palaeoerg, respectively, overlapped by the volcanic Serra Geral Formation. In Uruguay, the corresponding sedimentary units are named Batoví and Rivera Members (both from the Tacuarembó Formation), and the lava flows constitute the Arapey Formation (also in Paraná Basin). Despite the lack of body fossils in the mentioned Brazilian formations, Guará/Batoví dinosaur fauna is composed of theropod, ornithopod and wide-gauge sauropod tracks and isolated footprints, as well as theropod teeth. In turn, the Botucatu/Rivera dinosaur fauna is represented by theropod and ornithopod ichnofossils smaller than those from the underlying units. The analysis of these dinosaur ichnological records and comparisons with other global Mesozoic ichnofauna indicates that there is a size reduction in dinosaur fauna in the more arid Botucatu/Rivera environment, which is dominated by aeolian dunes. The absence of sauropod trackways in the Botucatu Sandstone fits with the increasingly arid conditions because it is difficult for heavy animals to walk on sandy dunes, as well as to obtain the required amount of food resources. This comparison between the Upper Jurassic and Lower Cretaceous dinosaur fauna in south Brazil and Uruguay demonstrates the influence of aridization on the size of animals occupying each habitat.

  18. Syngenetic and diagenetic features of evaporite-lutite successions of the Ipubi Formation, Araripe Basin, Santana do Cariri, NE Brazil

    Science.gov (United States)

    do Nascimento, Daniel Rodrigues, Jr.; da Silva Filho, Wellington Ferreira; Freire, José Gervásio, Jr.; dos Santos, Felipe Holanda

    2016-12-01

    The Ipubi Formation in the Araripe Basin (Northeast Brazil) has evaporite-lutite successions rich in gypsum, a mineral of great regional economic relevance, a highlighted stratigraphic mark, and also a natural boundary for underlying successions potentially analogous to "Pre-Salt" hydrocarbon reservoirs of the Brazilian coastal basins. In this study, syngenetic and diagenetic aspects of the Ipubi Formation at Santana do Cariri (Ceará State) were investigated by means of facies analysis, petrography, and mineralogical/chemical analyses of evaporites and shales. The results show that the contact relationship between evaporites and marly shales, without signs of subaerial exposure and laterally adjacent, was associated with shallow, calm and somewhat anoxic waterbodies, locally salt-supersaturated (brines) but under seasonal variations of water levels. This scenario could have shared place with hydrothermal phenomena in a playa lake depositional system. Regarding diagenesis, although there is evidence supporting pseudomorphic replacement of gypsum by anhydrite, the burial of the Ipubi Formation would have been limited due to the frequent occurrence of gypsum without any trace of chemical replacement.

  19. Parasitismo em humano por Amblyomma sp (Acari: Ixodidae, na cidade de Recife, estado de Pernambuco Parasitism by Amblyomma sp (Acari: Ixodidae in humans in the city of Recife, state of Pernambuco, Brazil

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    Rafael Antonio do Nascimento Ramos

    2010-10-01

    Full Text Available INTRODUÇÃO: Os ixodídeos pertencentes ao gênero Amblyomma são encontrados no Brasil, sendo de grande importância em Saúde Pública por representarem risco na transmissão de patógenos. MÉTODOS: Este trabalho relata um caso de parasitismo em humano por Amblyomma sp, ocorrido na Cidade de Recife, Pernambuco. RESULTADOS: O parasitismo foi observado em uma senhora onde os ectoparasitos encontravam-se fixados em suas pernas e pés. CONCLUSÕES: Este tipo de achado é incomum e constitui o primeiro relato do parasitismo em humano por Amblyomma sp, no Estado de Pernambuco.INTRODUCTION: The Amblyomma genus is widely distribution in Brazil and is important regarding the public health risk represented by the transmission of pathogens. METHODS: This paper reports a case of parasitism in humans by Amblyomma sp that occurred in the City of Recife, State of Pernambuco. RESULTS: Parasitism was observed in a woman where the ticks were attached to her legs and feet. CONCLUSIONS: This finding is unusual and is the first report of parasitism in humans by Amblyomma sp in State of Pernambuco.

  20. Corvomeyenia epilithosa sp. nov. (Porifera, Metaniidae no Parque Nacional da Serra Geral, Rio Grande do Sul, Brasil Corvomeyenia epilithosa sp. nov. (Porifera, Metaniidae at the National Park of Serra Geral, Rio Grande do Sul, Brazil

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    Cecilia Volkmer-Ribeiro

    2005-12-01

    Full Text Available Corvomeyenia epilithosa sp. nov. é descrita e registrada para área preservada no Sul do Brasil. São atualizadas a definição e a distribuição do gênero Corvomeyenia Weltner, 1913 propostas por Manconi & Pronzato (2002. É apresentada chave taxonômica para as quatro espécies do gênero: C. everetti (Mills, 1884 e C. carolinensis Harrison (1971, para a Região Neártica, C. thumi (Traxler, l895 e C. epilithosa sp. nov. para a Região Neotropical. São comentadas distinções significativas de habitat dessas espécies.Corvomeyenia epilithosa sp. nov. is described and registered for a protected area at southern Brazil. An updating of Manconi & Pronzato's (2002 definition and distribution of genus Corvomeyenia Weltner, 1913 is presented altogether with a taxonomic key for the four species in the genus: C. everetti (Mills, 1884 and C. carolinensis Harrison (1971, from the Neartic Region, C. thumi (Traxler, l895 and C. epilithosa sp. nov. from the Neotropical Region. Remarkable habitat distinctions exhibited by these species are commented.

  1. Integrated modeling of water quantity and quality in the Araguari River basin, Brazil

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    Marcio Ricardo Salla

    2014-03-01

    Full Text Available The Araguari River basin has a huge water resource potential. However, population and industrial growth have generated numerous private and collective conflicts of interest in the multiple uses of water, resulting in the need for integrated management of water quantity and quality at the basin scale. This study used the AQUATOOL Decision Support System. The water balance performed by the SIMGES module for the period of October 2006 to September 2011 provided a good representation of the reality of this basin. The parameters studied were dissolved oxygen, biochemical oxygen demand, organic nitrogen, ammonia, nitrate and total phosphorus. The coefficients of biochemical reactions, sedimentation rates and sediment dissolved oxygen release for this period were calibrated and validated in the quality modeling using the GESCAL module. A sensitivity analysis indicated that the coefficients of carbonaceous matter decomposition, nitrification, water temperature, and sediment oxygen demand interfered more significantly in the variables of state. To prevent eutrophication in the Nova Ponte reservoir and in the other cascade reservoirs, the local River Basin Committee should adopt restrictive actions against the use of agricultural fertilizers. On the other hand, in the sub basin of the Uberabinha River, new alternatives for public water supply to the city of Uberlândia and improvements in the treatment efficiency of the main wastewater treatment plant (WWTP should be proposed, since the biochemical oxygen demand, ammonia and total phosphorus failed to meet the requirements of COPAM (2008 in the driest months.

  2. Phlebotomine sandflies (Diptera: Psychodidae from Lábrea, state of Amazonas, Brazil, with a description of Evandromyia (Aldamyia apurinan Shimabukuro, Figueira & Silva, sp. nov.

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    Elder Augusto Guimarães Figueira

    2013-05-01

    Full Text Available An entomological survey was conducted from July-December 2009 and September-December 2010, as part of the epidemiological monitoring of American cutaneous leishmaniasis (ACL in the municipality of Lábrea, state of Amazonas (AM, Brazil. Sandflies were collected using CDC light traps installed in intra and peridomiciliary locations, as well as the border of forested areas around houses where autochthonous cases of ACL were recorded. A total of 510 sandflies belonging to 26 species were collected. The most abundant species was Nyssomyia antunesi (44.5% followed by Evandromyia walkeri (10.6% and Micropygomyia rorotaensis (9.8%. Here we also describe Evandromyia (Aldamyia apurinan sp. nov. and report new records for Trichophoromyia flochi and Evandromyia sipani in AM and Brazil, respectively. Our results describe the composition of the sandfly fauna in the south of AM and suggest Ny. antunesi as the putative vector in the transmission of Leishmania in this area of the Amazon Region.

  3. Monte Carlo approach to assess the uncertainty of wide-angle layered models: Application to the Santos Basin, Brazil

    Science.gov (United States)

    Loureiro, Afonso; Afilhado, Alexandra; Matias, Luís; Moulin, Maryline; Aslanian, Daniel

    2016-06-01

    In the Santos Basin (Brazil), two parallel wide-angle refraction profiles show different crustal structures. One shows moderate crustal velocity gradient, and a clear Moho with topography. The other has an anomalous velocity zone, and no clear Moho reflections. This has large implications on the geological and geodynamical interpretation of the basin. Model uncertainties must be excluded as a source of these differences. We developed VMONTECARLO, a tool to assess model uncertainty of layered velocity models using a Monte Carlo approach and simultaneous parameter perturbation using all picked refracted and reflected arrivals. It gives insights into the acceptable geological interpretations allowed by data and model uncertainty through velocity-depth plots that provide: a) the velocity-depth profile range that is consistent with the travel times; b) the random model that provides the best fit, keeping most of the observations covered by ray-tracing; c) insight into valid models dispersion; d) main model features unequivocally required by the travel times, e.g., first-order versus second-order discontinuities, and velocity gradient magnitudes; e) parameter value probability distribution histograms. VMONTECARLO is seamlessly integrated into a RAYINVR-based modelling work-flow, and can be used to assess final models or sound the solution space for alternate models, and is also capable of evaluating forward models without the need for inversion, thus avoiding local minima that may trap the inversion algorithms and providing information for models still not well-parametrised. Results for the Brazilian models show that the imaged structures are indeed geologically different and are not due to different interpretations of the same features within the model uncertainty bounds. These differences highlight the strong heterogeneity of the crust in the middle of the Santos Basin, where the rift is supposed to have failed.

  4. Host-parasite interactions between the piranha Pygocentrus nattereri (Characiformes: Characidae and isopods and branchiurans (Crustacea in the rio Araguaia basin, Brazil

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    Lucélia Nobre Carvalho

    2004-06-01

    Full Text Available In the tropics, studies on the ecology of host-parasite interactions are incipient and generally related to taxonomic aspects. The main objective of the present work was to analyze ecological aspects and identify the metazoan fauna of ectoparasites that infest the piranha, Pygocentrus nattereri. In May 2002, field samples were collected in the rio Araguaia basin, State of Goiás (Brazil. A total of 252 individuals of P. nattereri were caught with fishhooks and 32.14% were infested with ectoparasite crustaceans. The recorded ectoparasites were branchiurans, Argulus sp. and Dolops carvalhoi and the isopods Braga patagonica, Anphira branchialis and Asotana sp. The prevalence and mean intensity of branchiurans (16.6% and 1.5, respectively and isopods (15.5% and 1.0, respectively were similar. Isopods were observed in the gills of the host; branchiurans were more frequent where the skin was thinner, and facilitated attachment and feeding. The ventral area, the base of the pectoral fin and the gular area were the most infested areas. The correlations between the standard length of the host and the variables intensity and prevalence of crustaceans parasitism, were significant only for branchiurans (rs = 0.2397, p = 0.0001; chi2 = 7.97; C = 0.19. These results suggest that both feeding sites and body size probably play an important role in the distribution and abundance of ectoparasites.Nos trópicos, os estudos sobre a ecologia de interações parasito-hospedeiro são incipientes, sendo a maioria de cunho taxonômico. O principal objetivo do presente estudo foi identificar a fauna metazoária de ectoparasitas e analisar aspectos ecológicos da piranha Pygocentrus nattereri. As coletas foram realizadas em maio de 2002, na bacia do rio Araguaia, GO. Com o auxílio de linha e anzol foram capturados 252 exemplares de P. nattereri, dos quais 32,14% estavam infestados por crustáceos ectoparasitos. As espécies de ectoparasitas registradas foram Argulus sp

  5. A new species of Contulma Flint (Trichoptera, Anomalopsychidae from southeastern Brazil

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    Gabriela A. Jardim

    2011-06-01

    Full Text Available A new species of Contulma Flint (Trichoptera, Anomalopsychidae from southeastern Brazil. Contulma sana sp. nov. is described and illustrated based on specimens collected in the Rio Macaé Basin, Macaé, Rio de Janeiro State, Brazil. The new species can be distinguished from congeners by the following male genitalia characters: long posterior lobes, dorsomedian processes of segment IX diverging on apical third, and well developed phallotremal sclerite. The female and immature stages are unknown.

  6. Lironeca desterroensis sp. nov. (Isopoda, Cymothoidae from the gills of a marine fish, Cetengraulis edentulus Cuvier, of Santa Catarina Island, Brazil

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    Thatcher Vernon E.

    2003-01-01

    Full Text Available Lironeca desterroensis sp. nov. (Isopoda, Cymothoidae is described on the basis of 105 females and three males taken from the gill chambers of the marine fish, Cetengraulis edentulus (Cuvier,1829, obtained near Santa Catarina Island, Brazil. The new species resembles Lironeca redmanni Leach, 1818, in size and general appearance but differs from that species in a number of important respects. In the new species, the pleotelson is larger, the pleonites are laterally produced, the uropods have elongate and slender rami and the larval stage (Pullus II has a prominent frontal projection.

  7. Evaluation of different methods to estimate daily reference evapotranspiration in ungauged basins in Southern Brazil

    Science.gov (United States)

    Ribeiro Fontoura, Jessica; Allasia, Daniel; Herbstrith Froemming, Gabriel; Freitas Ferreira, Pedro; Tassi, Rutineia

    2016-04-01

    Evapotranspiration is a key process of hydrological cycle and a sole term that links land surface water balance and land surface energy balance. Due to the higher information requirements of the Penman-Monteith method and the existing data uncertainty, simplified empirical methods for calculating potential and actual evapotranspiration are widely used in hydrological models. This is especially important in Brazil, where the monitoring of meteorological data is precarious. In this study were compared different methods for estimating evapotranspiration for Rio Grande do Sul, the Southernmost State of Brazil, aiming to suggest alternatives to the recommended method (Penman-Monteith-FAO 56) for estimate daily reference evapotranspiration (ETo) when meteorological data is missing or not available. The input dataset included daily and hourly-observed data from conventional and automatic weather stations respectively maintained by the National Weather Institute of Brazil (INMET) from the period of 1 January 2007 to 31 January 2010. Dataset included maximum temperature (Tmax, °C), minimum temperature (Tmin, °C), mean relative humidity (%), wind speed at 2 m height (u2, m s-1), daily solar radiation (Rs, MJ m- 2) and atmospheric pressure (kPa) that were grouped at daily time-step. Was tested the Food and Agriculture Organization of the United Nations (FAO) Penman-Monteith method (PM) at its full form, against PM assuming missing several variables not normally available in Brazil in order to calculate daily reference ETo. Missing variables were estimated as suggested in FAO56 publication or from climatological means. Furthermore, PM was also compared against the following simplified empirical methods: Hargreaves-Samani, Priestley-Taylor, Mccloud, McGuiness-Bordne, Romanenko, Radiation-Temperature, Tanner-Pelton. The statistical analysis indicates that even if just Tmin and Tmax are available, it is better to use PM estimating missing variables from syntetic data than

  8. Rift border system: The interplay between tectonics and sedimentation in the Reconcavo basin, northeastern Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Magnavita, L.P.; Silva, T.F. da [Petrobras/E & P - BA, Bahia (Brazil)

    1995-11-01

    A geometric and depositional model is proposed to explain the tectonic and sedimentary evolution of the main border of the Reconcavo basin. The architecture of the rift margin is characterized by a rift border system constituted by (1) a master fault, (2) a step, and (3) a clastic wedge. This footwall-derived clastic wedge is interpreted as alluvial fans and fan deltas composed of conglomerates that interfinger with hanging-wall strata. The analysis of the vertical distribution of coarse-grained components of this wedge suggests that its composition is geographically controlled, and no regular inverted stratigraphy is commonly described for this type of succession. During an initial lacustrine phase, turbidites accumulated farther from and parallel to the rift margin. The mapping of marker beds that bound these lacustrine turbidite deposits may be used to infer major periods of clastic influx and, therefore, to correlate with periods of fault-related subsidence or climatic fluctuations in the depositional basin and erosion of the sediment source area. Periods of limited back-faulting and basin expansion toward the main border are distinguished through patterns of progradation and aggradation indicating progressive retreat of the rift border and younging; in the footwall direction. The overall evolution of the rift border seems to be related to extension, block rotation, hanging-wall subsidence, and footwall uplift associated with the initial master fault, with limited propagation of faults away from the basin into the footwall.

  9. Search for Borrelia sp. in ticks collected from potential reservoirs in an urban forest reserve in the State of Mato Grosso do Sul, Brazil: a short report

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    IP da Costa

    2002-07-01

    Full Text Available A total of 128 ticks of the genus Amblyomma were recovered from 5 marsupials (Didelphis albiventris - with 4 recaptures - and 17 rodents (16 Bolomys lasiurus and 1 Rattus norvegicus captured in an urban forest reserve in Campo Grande, State of Mato Grosso do Sul, Brazil. Of the ticks collected, 95 (78.9% were in larval form and 22 (21.1% were nymphs; the only adult (0.8% was identified as A. cajennense. Viewed under dark-field microscopy in the fourth month after seeding, 9 cultures prepared from spleens and livers of the rodents, blood of the marsupials, and macerates of Amblyomma sp. nymphs revealed spiral-shaped, spirochete-like structures resembling those of Borrelia sp. Some of them showed little motility, while others were non-motile. No such structures could be found either in positive Giemsa-stained culture smears or under electron microscopy. No PCR amplification of DNA from those cultures could be obtained by employing Leptospira sp., B. burgdorferi, and Borrelia sp. primers. These aspects suggest that the spirochete-like structures found in this study do not fit into the genera Borrelia or Leptospira, requiring instead to be isolated for proper identification.

  10. A prevalent alpha-proteobacterium Paracoccus sp. in a population of the Cayenne ticks (Amblyomma cajennense from Rio de Janeiro, Brazil

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    Erik Machado-Ferreira

    2012-01-01

    Full Text Available As Rocky Mountain Spotted Fever is the most common tick-borne disease in South America, the presence of Rickettsia sp. in Amblyomma ticks is a possible indication of its endemicity in certain geographic regions. In the present work, bacterial DNA sequences related to Rickettsia amblyommii genes in A. dubitatum ticks, collected in the Brazilian state of Mato Grosso, were discovered. Simultaneously, Paracoccus sp. was detected in aproximately 77% of A. cajennense specimens collected in Rio de Janeiro, Brazil. This is the first report of Paracoccus sp. infection in a specific tick population, and raises the possibility of these bacteria being maintained and/or transmitted by ticks. Whether Paracoccus sp. represents another group of pathogenic Rhodobacteraceae or simply plays a role in A. cajennense physiology, is unknown. The data also demonstrate that the rickettsial 16S rRNA specific primers used forRickettsia spp. screening can also detect Paracoccus alpha-proteobacteria infection in biological samples. Hence, a PCRRFLP strategy is presented to distinguish between these two groups of bacteria.

  11. Search for Borrelia sp. in ticks collected from potential reservoirs in an urban forest reserve in the State of Mato Grosso do Sul, Brazil: a short report.

    Science.gov (United States)

    Costa, I P da; Bonoldi, V L N; Yoshinari, N H

    2002-07-01

    A total of 128 ticks of the genus Amblyomma were recovered from 5 marsupials (Didelphis albiventris) - with 4 recaptures - and 17 rodents (16 Bolomys lasiurus and 1 Rattus norvegicus) captured in an urban forest reserve in Campo Grande, State of Mato Grosso do Sul, Brazil. Of the ticks collected, 95 (78.9%) were in larval form and 22 (21.1%) were nymphs; the only adult (0.8%) was identified as A. cajennense. Viewed under dark-field microscopy in the fourth month after seeding, 9 cultures prepared from spleens and livers of the rodents, blood of the marsupials, and macerates of Amblyomma sp. nymphs revealed spiral-shaped, spirochete-like structures resembling those of Borrelia sp. Some of them showed little motility, while others were non-motile. No such structures could be found either in positive Giemsa-stained culture smears or under electron microscopy. No PCR amplification of DNA from those cultures could be obtained by employing Leptospira sp., B. burgdorferi, and Borrelia sp. primers. These aspects suggest that the spirochete-like structures found in this study do not fit into the genera Borrelia or Leptospira, requiring instead to be isolated for proper identification.

  12. A prevalent alpha-proteobacterium Paracoccus sp. in a population of the Cayenne ticks (Amblyomma cajennense) from Rio de Janeiro, Brazil.

    Science.gov (United States)

    Machado-Ferreira, Erik; Piesman, Joseph; Zeidner, Nordin S; Soares, Carlos A G

    2012-12-01

    As Rocky Mountain Spotted Fever is the most common tick-borne disease in South America, the presence of Rickettsia sp. in Amblyomma ticks is a possible indication of its endemicity in certain geographic regions. In the present work, bacterial DNA sequences related to Rickettsia amblyommii genes in A. dubitatum ticks, collected in the Brazilian state of Mato Grosso, were discovered. Simultaneously, Paracoccus sp. was detected in aproximately 77% of A. cajennense specimens collected in Rio de Janeiro, Brazil. This is the first report of Paracoccus sp. infection in a specific tick population, and raises the possibility of these bacteria being maintained and/or transmitted by ticks. Whether Paracoccus sp. represents another group of pathogenic Rhodobacteraceae or simply plays a role in A. cajennense physiology, is unknown. The data also demonstrate that the rickettsial 16S rRNA specific primers used forRickettsia spp. screening can also detect Paracoccus alpha-proteobacteria infection in biological samples. Hence, a PCR-RFLP strategy is presented to distinguish between these two groups of bacteria.

  13. The Linguado, Carapeba, Vermelho, and Marimba giant oil fields, Campos basin, offshore Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Stank, C.V.; Esteves, F.R.; Martins, C.C.; Cruz, W.M.; Da Silva Barroso, A.; Horschutz, P.M.C. (Petrobras, Rio de Janeiro (Brazil))

    1990-09-01

    About 40 hydrocarbon accumulations have been discovered in the Campos basin in the period 1978-1984, including four giant fields in shallow to moderate water depths. The Linguado oil field is located on the extreme south of the producing area of the Campos basin. The pool was discovered in May 1978. The reservoir rocks occur between 1,700 and 3,000 m, and are constituted by fractured Neocomian basalts, Barremian pelecypod coquinas, Albian oolitic calcarenites, and, secondarily, by some Cretaceous turbidite sandstones. The main reservoir is formed by coquinas, which contain 76% of the total recoverable oil volume estimated at 104.6 million bbl. The field is located on a regional high and the accumulation is strongly controlled by stratigraphic and diagenetic factors. High-quality oil is produced through a floating producing system (FPS), and the cumulative oil production amounts to 63.8 million bbl. The Carapeba and Vermelho oil fields are situated in the northern limit of the Campos basin producing area and, together with the smaller Pargo field, make up the so-called Northeast Pole of Campos basin. Carapeba field was discovered in February 1982, and has an estimated recoverable oil volume of 127.8 million bbl. Production comes mainly from two Upper Cretaceous turbidite sandstone reservoirs. The Vermelho field in December 1982, and its main reservoir is formed by a massive Eocene turbidite sandstone. The estimated recoverable oil volume amounts to 119.7 million bbl. Both Carapeba and Vermelho fields are structural traps associated with the development of subtle anticlines caused by salt movements. The fields are gradually being put on stream through five fixed platforms installed in water depths ranging from 70 to 90 m. The Marimba field, discovered in March 1984, drilled in a water depth of 383 m, is considered the first deep-water oil strike in the Campos basin. The field has an estimated recoverable oil volume of 115 million bbl of good-quality oil.

  14. Hydrochemistry and weathering rates on Corumbataí River basin, São Paulo State, Brazil

    Science.gov (United States)

    Bonotto, Daniel Marcos; Lima, Jorge Luis Nepomuceno de

    2010-03-01

    SummaryThis work was held at the Corumbataí River basin that is inserted within the giant Paraná sedimentary basin (Paleozoic-Cenozoic) in South America. The Corumbataí River is the major river draining the area and its water is extensively used by water supply systems in the basin. Its surface waters were collected at two sampling points, upstream and downstream from Rio Claro city, the principal municipality within the basin. We report chemical and radionuclides ( 222Rn and 210Po) analyses for rainwater and river water samples in order to estimate chemical weathering fluxes. All major chemical data indicated poorer conditions of the water quality in Corumbataí River after reaching Rio Claro city. However, one very important finding was that the weighted mean of the 210Po activity concentration is the same (0.21 dpm/L) upstream and downstream from Rio Claro city, indicating that 210Po is a conservative nuclide. The net output flux in Corumbataí River basin estimated from the difference between the total discharge flux and the input flux based on wet precipitation yielded a negative value for polonium as it is a very particle-reactive radionuclide, tending to accumulate into fluvial sediments. The chemical weathering rate (removed material quantity) corresponded to 76.5 t/km 2 yr when Po data in sediments and rocks were utilized in the calculations. This rate is compatible with others determined elsewhere, indicating the usefulness of Po in studies of weathering processes, even in areas characterized by anthropogenic inputs.

  15. Catastrophic floods as a possible cause of organic matter accumulation giving rise to coal, Parana Basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Begossi, Romana; Della Favera, Jorge Carlos [Stratigraphy and Paleontology Department, Rio de Janeiro State University, Rio de Janeiro (Brazil)

    2002-11-01

    Gondwana coals of the Rio Bonito Formation (Parana Basin) in Southern Brazil have generally large ash yields, so they could be better called coaly siltstones than coal. In addition, hummocky cross stratification (HCS) was found in several coal beds of the Rio Bonito Formation throughout the basin. In this formation, the frequent and close relationship between facies involving rocks generated by subaqueous gravity flows (diamictites) and coal itself provides an excellent depositional model based on resedimentary processes acting during deposition, as well as a stratigraphic rearrangement of the present units. In the State of Rio Grande do Sul (southern part of Parana Basin), coals are actually prodelta deposits related to delta-front diamictite and conglomeratic sandstone with sigmoidal bedding. Coal-forming organic sediments would come from trees plucked by the floods, as indicated by the wood logs floating in the diamictite, and reworking of previous peat accumulations. Every coal layer is covered generally by paleosoil siltstones, which represent colonization at the top of the catastrophic flood deposit, ending a sedimentary cycle. In case of Brazilian coal settings, several authors recognized deltas (fan deltas or braid deltas). Here is particularly considered the general environment as a salted interior sea (lago mare, Hsue et al. sense).The present study will refer to three important lithostratigraphic units in the Carboniferous-Early Triassic cycle: the Itarare Group, the Rio Bonito Formation, and the Palermo Formation. Although the preferential mode of occurrence of HCS in shallow marine environments indicates a genesis attributed to storm action, other causes, such as catastrophic flooding, have been advanced. Mutti et al. [Mem. Sci. Geol. 48 (1996) 233] described flood-dominated deltaic systems with thick conglomerate, sandstone, and pelitic deposits, derived from small- to medium-scale fluvial systems and mountain-bordered drainage basins adjacent to the

  16. Soil loss prediction in Guaraíra river experimental basin, Paraíba, Brazil based on two erosion simulation models

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    Jorge Flávio Cazé B. da Costa Silva

    2007-12-01

    Full Text Available In this study, two hydrological models to estimate soil losses and sediment yield due to sheet and channel erosion, at the basin outlet, are applied to Guaraíra River Experimental Basin, located in Paraíba State, northeastern Brazil. The soil erosion models are (a the classical Universal Soil Loss Equation (USLE, which is used to simulate annual and monthly soil losses; and (b Kineros model, which is used to simulate the sediment yield within the basin. Kineros model is a physically-based distributed model that uses a cascade of planes and channels to represent the basin and to describe the processes of interception, infiltration, surface runoff and erosion within the basin. The USLE is computed using land use, soil erodibility, topographic digital maps, as well as observed rainfall data. It was found that Guaraíra river experimental basin has a low potential for soil losses; however, specific areas which are susceptible to the erosion process in the basin could be detected by the modeling techniques coupled to a GIS (Geographic Information System.

  17. Serological evidence for Saint Louis encephalitis virus in free-ranging New World monkeys and horses within the upper Paraná River basin region, Southern Brazil

    OpenAIRE

    2014-01-01

    Introduction Saint Louis encephalitis virus (SLEV) primarily occurs in the Americas and produces disease predominantly in humans. This study investigated the serological presence of SLEV in nonhuman primates and horses from southern Brazil. Methods From June 2004 to December 2005, sera from 133 monkeys (Alouatta caraya, n=43; Sapajus nigritus, n=64; Sapajus cay, n=26) trap-captured at the Paraná River basin region and 23 blood samples from farm horses were obtained and used for the ser...

  18. Two new species of Pseudancistrus (Siluriformes, Loricariidae) from the Amazon basin, northern Brazil

    OpenAIRE

    Gabriel da Costa e Silva; Roxo, Fábio F; Claudio Oliveira

    2015-01-01

    Abstract Two new species of Pseudancistrus , a genus diagnosed by non-evertible cheek plates and hypertrophied odontodes along the snout margin, are described from two drainages of the Brazilian Shield: Pseudancistrus kayabi from the rio Teles Pires (rio Tapajós basin) and Pseudancistrus asurini from the rio Xingu. The new species are distinguished from congeners ( Pseudancistrus barbatus , Pseudancistrus corantijniensis , Pseudancistrus depressus , Pseudancistrus nigrescens , Pseudancistrus ...

  19. Stress variability in the Parnaíba Basin, Brazil, during Cretaceous rifting

    Science.gov (United States)

    Ibanez, Delano M.; Pestilho, André L. S.; Turra, Bruno B.; Destro, Nivaldo; Miranda, Fernando P.; Riccomini, Claudio; Lammoglia, Talita; Dubois, Daniel S.; Schmidt, Jaques S.

    2017-03-01

    The Cretaceous section of the Parnaíba Basin, designated as Grajaú Basin, represents an intracontinental half-graben formed during the Early Cretaceous due to the separation between the South American and African continents during the final dispersal of Western Gondwana. Here, through a synergetic approach between fluid inclusion planes (FIPs), outcropping geologic structures, borehole breakouts and remote sensing data, we elucidate in different scales the main structural features and their kinematic indicators. Normal faults strike mainly NNE-SSW and WNW-ESE, while deformation bands and extension joints trend to NW-SE and NE-SW, and FIPs to NE-SW and WNW-ESE. In addition, normal fault-generated scarps border geomorphological units and constitute dense zones of deformation bands and fluidization. Microthermometric FIP analyses suggest this fracturing event occurred at shallow basin levels, at temperatures below 50 °C. Furthermore, joints, bands and FIPs present mutually cross-cutting relationships, thus indicating contemporaneity. The numerical inversions applied to striated faults, non-striated faults, joints, deformation bands and FIPs suggest the occurrence of an extensional event characterized by variable direction of extension (σ3) trending from NW-SE to WNW-ESE or NE-SE to NNE-SSW. This event probably started in the Albian during the final Gondwana fragmentation stages. The quasi-perpendicular σ3 trend could be caused by one or all of the following phenomena: a) stress ratio R values obtained (switch positions in relation to the regional extension (WNW-ESE) by rotating 90°; c) influence of the pre-existing structures on the regional stress field. Thus, the spatial and temporal relationships between Cretaceous fault activity, stress field and the development of the geomorphological features in the Grajaú Basin contribute to understanding of the Brazilian Equatorial margin geodynamics.

  20. A new species of Scinax Wagler, 1830 (Anura: Hylidae from the middle Amazon river basin, Brazil

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    Marcelo José Sturaro

    2014-01-01

    Full Text Available A new species of the hylid genus Scinax is described and illustrated. The new taxon was found in the Amazonian rainforest of northern Brazil, municipalities of Maués and Careiro da Várzea, state of Amazonas. The new species is characterized by its moderate size (male mean snout-vent length 36.3mm; body robust; large, orange, black-bordered axillary and inguinal spots; and bilobate vocal sac. This new species was found in primary and secondary forest on branches of shrubs or trees in, or next to, permanent ponds and flooded areas.

  1. Late Neogene Sequence Stratigraphic Evolution of the Foz do Amazonas Basin, Brazil

    Science.gov (United States)

    Gorini, Christian; Haq, Bilal U.; Tadeu dos Reis, Antonio; Guizan Silva, Cleverson; Cruz, Alberto; Soares, Emilson; Grangeon, Didier

    2014-05-01

    The margin of the Foz do Amazonas Basin saw a shift from predominantly carbonate to siliciclastic sedimentation in the early late Miocene. By this time the Amazon shelf had also been incised by a canyon that allowed direct influx of sediment to the basin floor, thus confirming that the paleo-Amazon fan had already initiated by that time (9.5-8.3Ma). Above this interval, during a prolonged lowstand, Messinian third-order sequences are preserved only in the incised-valley fills of the canyon with no equivalent strata on the shelf. Third and fourth-order sequences younger than Messinian are preserved on the shelf after sea-level rise above the shelf by early Pliocene. Sequences younger than 3.8 Ma often show fourth-order cyclicity with average duration of 400 kyr (larger scale eccentricity cycles) often preserved in high sedimentation rate areas of river deltas. Mass wasting and transportation of slope sediments to the basin began to play an important role in sediment dispersal at least as far back as mid Pliocene, after rapid progradation had produced steeper slopes 23 more prone to failure.

  2. The evolution of Neoproterozoic magmatism in Southernmost Brazil: shoshonitic, high-K tholeiitic and silica-saturated, sodic alkaline volcanism in post-collisional basins

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    Sommer Carlos A.

    2006-01-01

    Full Text Available The Neoproterozoic shoshonitic and mildly alkaline bimodal volcanism of Southernmost Brazil is represented by rock assemblages associated to sedimentary successions, deposited in strike-slip basins formed at the post-collisional stages of the Brasilian/Pan-African orogenic cycle. The best-preserved volcano sedimentary associations occur in the Camaquã and Campo Alegre Basins, respectively in the Sul-riograndense and Catarinense Shields and are outside the main shear belts or overlying the unaffected basement areas. These basins are characterized by alternation of volcanic cycles and siliciclastic sedimentation developed dominantly on a continental setting under subaerial conditions. This volcanism and the coeval plutonism evolved from high-K tholeiitic and calc-alkaline to shoshonitic and ended with a silica-saturated sodic alkaline magmatism, and its evolution were developed during at least 60 Ma. The compositional variation and evolution of post-collisional magmatism in southern Brazil are interpreted as the result mainly of melting of a heterogeneous mantle source, which includes garnet-phlogopite-bearing peridotites, veined-peridotites with abundant hydrated phases, such as amphibole, apatite and phlogopite, and eventually with the addition of an asthenospheric component. The subduction-related metasomatic character of post-collisional magmatism mantle sources in southern Brazil is put in evidence by Nb-negative anomalies and isotope features typical of EM1 sources.

  3. A new troodontid theropod, Talos sampsoni gen. et sp. nov., from the Upper Cretaceous Western Interior Basin of North America.

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    Lindsay E Zanno

    Full Text Available BACKGROUND: Troodontids are a predominantly small-bodied group of feathered theropod dinosaurs notable for their close evolutionary relationship with Avialae. Despite a diverse Asian representation with remarkable growth in recent years, the North American record of the clade remains poor, with only one controversial species--Troodon formosus--presently known from substantial skeletal remains. METHODOLOGY/PRINCIPAL FINDINGS: Here we report a gracile new troodontid theropod--Talos sampsoni gen. et sp. nov.--from the Upper Cretaceous Kaiparowits Formation, Utah, USA, representing one of the most complete troodontid skeletons described from North America to date. Histological assessment of the holotype specimen indicates that the adult body size of Talos was notably smaller than that of the contemporary genus Troodon. Phylogenetic analysis recovers Talos as a member of a derived, latest Cretaceous subclade, minimally containing Troodon, Saurornithoides, and Zanabazar. MicroCT scans reveal extreme pathological remodeling on pedal phalanx II-1 of the holotype specimen likely resulting from physical trauma and subsequent infectious processes. CONCLUSION/SIGNIFICANCE: Talos sampsoni adds to the singularity of the Kaiparowits Formation dinosaur fauna, which is represented by at least 10 previously unrecognized species including the recently named ceratopsids Utahceratops and Kosmoceratops, the hadrosaurine Gryposaurus monumentensis, the tyrannosaurid Teratophoneus, and the oviraptorosaurian Hagryphus. The presence of a distinct troodontid taxon in the Kaiparowits Formation supports the hypothesis that late Campanian dinosaurs of the Western Interior Basin exhibited restricted geographic ranges and suggests that the taxonomic diversity of Late Cretaceous troodontids from North America is currently underestimated. An apparent traumatic injury to the foot of Talos with evidence of subsequent healing sheds new light on the paleobiology of deinonychosaurians

  4. Erythrodiplax leticia, sp.n. de libélula do nordeste brasileiro (Odonata, Libellulidae Erythrodiplax leticia, n.sp. of dragonfly from northeastern Brazil (Odonata, Libellulidae

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    Angelo B.M Machado

    1995-01-01

    Full Text Available Erythrodiplax leticia sp.n. is described based on nine male specimens, most of which collected at Chapada Diamantina, State of Bahia. The new species is close to Erythrodiplax fervida (Erichson, 1848 but differs from it by the size. venation. extension of the basal wing spots. and structure of the superior anal appendages.

  5. Pockmark asymmetry and seafloor currents in the Santos Basin offshore Brazil

    Science.gov (United States)

    Schattner, U.; Lazar, M.; Souza, L. A. P.; ten Brink, U.; Mahiques, M. M.

    2016-09-01

    Pockmarks form by gas/fluid expulsion into the ocean and are preserved under conditions of negligible sedimentation. Ideally, they are circular at the seafloor and symmetrical in profile. Elliptical pockmarks are more enigmatic. They are associated with seafloor currents while asymmetry is connected to sedimentation patterns. This study examines these associations through morphological analysis of new multibeam data collected across the Santos continental slope offshore Brazil in 2011 (353-865 mbsl). Of 984 pockmarks, 78% are both elliptical and asymmetric. Geometric criteria divide the pockmarks into three depth ranges that correlate with a transition between two currents: the Brazil Current transfers Tropical Water and South Atlantic Central Water southwestwards while the Intermediate Western Boundary Current transfers Antarctic Intermediate Water northeastwards. It is suggested that the velocity of seafloor currents and their persistence dictate pockmark ellipticity, orientation and profile asymmetry. Fast currents (>20 cm/s) are capable of maintaining pockmark flank steepness close to the angle of repose. These morphological expressions present direct evidence for an edge effect of the South Atlantic Subtropical Gyre and, in general, provide a correlation between pockmark geometry and seafloor currents that can be applied at other locations worldwide.

  6. Pockmark asymmetry and seafloor currents in the Santos Basin offshore Brazil

    Science.gov (United States)

    Schattner, U.; Lazar, M.; Souza, L. A. P.; ten Brink, U.; Mahiques, M. M.

    2016-12-01

    Pockmarks form by gas/fluid expulsion into the ocean and are preserved under conditions of negligible sedimentation. Ideally, they are circular at the seafloor and symmetrical in profile. Elliptical pockmarks are more enigmatic. They are associated with seafloor currents while asymmetry is connected to sedimentation patterns. This study examines these associations through morphological analysis of new multibeam data collected across the Santos continental slope offshore Brazil in 2011 (353-865 mbsl). Of 984 pockmarks, 78% are both elliptical and asymmetric. Geometric criteria divide the pockmarks into three depth ranges that correlate with a transition between two currents: the Brazil Current transfers Tropical Water and South Atlantic Central Water southwestwards while the Intermediate Western Boundary Current transfers Antarctic Intermediate Water northeastwards. It is suggested that the velocity of seafloor currents and their persistence dictate pockmark ellipticity, orientation and profile asymmetry. Fast currents (>20 cm/s) are capable of maintaining pockmark flank steepness close to the angle of repose. These morphological expressions present direct evidence for an edge effect of the South Atlantic Subtropical Gyre and, in general, provide a correlation between pockmark geometry and seafloor currents that can be applied at other locations worldwide.

  7. Mesozoic lacustrine system in the Parnaíba Basin, northeastern Brazil: Paleogeographic implications for west Gondwana

    Science.gov (United States)

    Cardoso, Alexandre Ribeiro; Nogueira, Afonso César Rodrigues; Abrantes, Francisco Romério; Rabelo, Cleber Eduardo Neri

    2017-03-01

    The fragmentation of the West Gondwana during Early Triassic to Cretaceous was marked by intense climatic changes, concomitant with the establishment of extensive desertic/lacustrine systems. These deposits succeeded the emplacement and extrusion of lava flows, related to the pre-rift phase and initial opening of the Equatorial Atlantic Ocean. The thermal phase is recorded in the Upper Jurassic-Lower Cretaceous Pastos Bons Formation, exposed mainly in southeast parts of the Parnaíba Basin, Northeastern Brazil. The sedimentary facies of this unit were grouped in two facies associations (FA), representative of a shallow lacustrine system, influenced by episodic hyperpycnal and oscillatory flows. Central lake facies association (FA1) is composed by laminated mudstone (Ml), sandstone/mudstone rhythmite (S/Mr) and sandstone with even-parallel lamination (Sel). Flysch-like delta front (FA2) consists in sandstones with wave structures (Sw), sandstones with even-parallel stratification (Ses), massive sandstones (Sm), sandstones with soft-sediment deformation structures (Sd) and laminated mudstones (Ml). FA1 was deposited in the deepest portions of the lake, characterized by low energy, episodically disturbed by siliciclastic influx. FA2 presents sandy deposits generated by unconfined flow, probably fed by ephemeral stream flows that generated thickening upward of tabular sandstone beds. The progressive filling of the lake resulted in recurrent shoaling up of the water level and reworking by wave action. The installation of Pastos Bons lakes was controlled by thermal subsidence, mainly in restricted depocenters. The siliciclastic fluvial inflow can be related to the adjacent humid desertic facies, formed under climatic attenuation, typical of post-Triassic period, with reduced biological activity. Smectite and abundant feldspars, in lacustrine facies, corroborate an arid climate, with incipient chemical weathering. The new facies and stratigraphic data present in this

  8. Delimitation and analysis of environmental protection areas in the Paraíba do Sul River Basin in Brazil

    Science.gov (United States)

    de Oliveira Ortiz, Jussara; Rosim, Sergio; Jimenez Ortiz, Manoel; de Freitas Oliveira, João. R.; Morais, Rodolfo; Siqueira, Fernando R.

    2014-10-01

    This work establishes a semi-automatic methodology to define and evaluate the Environmental Protection Areas (EPA), in the Paraíba River Basin, Brazil, taking account the land use and the water quality. The development of this work started from the water capitation point of Guaratingueta city located on the stream that runs through the city. From ASTER GDEM data the drainage network and the basin catchment was automatically extracted. Landsat images for the dates of 1989, 2001 and 2014 were digitally classified and the land uses were mapped, considering the area of permanent protection (APP) for drainage, respecting the limits indicated by Brazilian forest code. Scenes from the RapidEye satellite were used to answer questions of classification, due to good image definition. The study showed that in 1989, the total area classified as APP, 37.59% were anthropized, reaching 37.98% in 2001 and 36.98% in 2014. In a few years it was possible to associate data from water quality, measured directly at the capitation. In 2001 the water quality data showed that the intensive use of fertilizers drained into the Guaratingueta stream by rice paddies was seriously affecting the water supply of the municipality. In 2008 measures for water quality at the capitation point showed that the water resources were still impacted by agricultural activities from the rice fields. So, this work indicates the need for revitalization of the APP inside the EPA Guaratingueta in order to meet the law, protect watersheds and also avoid large investments in water treatment arriving for public consumption.

  9. Results of the marine biota monitoring during drilling activity on Campos Basin, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Petta, Claudia Brigagao de; Bastos, Fabio; Danielski, Monica; Ferreira, Mariana; Gama, Mariana; Coelho, Ana Paula Athanazio; Maia, Decio [Aecom do Brasil Ltda, Rio de Janeiro, RJ (Brazil)

    2012-07-01

    The Environmental Monitoring Project (PMA) aims to report environmental changes arising from drilling activity, in relation to the marine fauna. This project can also help in the monitoring of accidental spills. Since the professionals spend six hours of the day monitoring the ocean around the rigs, they can locate and identify oil stains, notify the responsible onboard, and also help in the monitoring of the oil stain. Such Project has been developed onboard a drilling unit working in Campos Basin. The results presented here were collected during the drilling activity in Bijupira and Salema fields, by Shell Brasil Petroleo Ltda, from July 13th to October 8th, 2011.

  10. Two new species of Pseudancistrus (Siluriformes, Loricariidae) from the Amazon basin, northern Brazil.

    Science.gov (United States)

    Silva, Gabriel S C; Roxo, Fábio F; Oliveira, Claudio

    2015-01-01

    Two new species of Pseudancistrus, a genus diagnosed by non-evertible cheek plates and hypertrophied odontodes along the snout margin, are described from two drainages of the Brazilian Shield: Pseudancistruskayabi from the rio Teles Pires (rio Tapajós basin) and Pseudancistrusasurini from the rio Xingu. The new species are distinguished from congeners (Pseudancistrusbarbatus, Pseudancistruscorantijniensis, Pseudancistrusdepressus, Pseudancistrusnigrescens, Pseudancistrusreus, and Pseudancistruszawadzkii) by the coloration pattern. Pseudancistruskayabi has dark bars on the dorsal and caudal fins which are similar to that of Pseudancistrusreus from the Caroní River, Venezuela. Pseudancistrusasurini is unique among Pseudancistrus in having whitish tips of the dorsal and caudal fins in juveniles to medium-sized adults.

  11. Composição florística e estrutura do componente arbóreo de uma Floresta Paludosa na planície costeira da bacia do rio Itaguaré, Bertioga, SP, Brasil. Floristic composition andstructure of an arboreal component of the Paludal Forest in the coastal plain of the Itaguaré river basin, Bertioga (São Paulo state, Brazil

    Directory of Open Access Journals (Sweden)

    Celia Regina de Gouveia SOUZA

    2012-06-01

    Full Text Available As Florestas Paludosas costeiras ou “caxetais” ocorrem no Domínio Atlântico, em geral associadas a depressões paleolagunares, cujos terrenos são permanentemente encharcados. Essas florestas se caracterizam por apresentar elevada densidade de indivíduos da espécie Tabebuia cassinoides (Lam. DC., conhecida popularmente por “caxeta”. O presente estudo foi desenvolvido em uma Floresta Paludosa situada na planície costeira do rio Itaguaré, município de Bertioga, Baixada Santista, Estado de São Paulo. A composição florística e a estrutura fitossociológica foram investigadas através da amostragem por parcelas, sendo incluídos todos os indivíduos com 10 cm ou mais de diâmetro a 1,3 m de altura do peito (DAP. Foram registradas 20 espécies e 11 famílias botânicas, resultando em uma densidade total de 450 ind./ha-1. A família com maior riqueza de espécies foi Myrtaceae, com quatro espécies. A análise de similaridade indicou dois grupos florísticos. Tabebuia cassinoides foi, de fato, a espécie mais importante, apresentando grande densidade e dominância de indivíduos, o que reforça sua posição de espécie indicadora deste tipo vegetacional, conforme difundido na literatura. The coastal Paludal Forest or “Caxetal” occurs on the Atlantic Domain, associated to wetlands within palaeolagoonal depressions. It is characterized by a high density of individuals of Tabebuia cassinoides (Lam. DC., which is popularly known as “caxeta”. A Paludal Forest located in the Itaguaré river coastal plain, in the municipality of Bertioga, Santos Lowland, São Paulo State, Brazil was studied. The floristic composition and phytossociological structure was investigated through a plot method including all individuals with diameter at 1.3 m (DBH ≥ 10 cm. A total of 20species and 11 botanic families were sampled, resulting in a total density of 450 ind./ha-1. Myrtaceae showed the highest species richness. The similarity index indicated

  12. The Aquatic Environment as a Reservoir of Vibrio cholerae O1 in Hydrographic Basins of the State of Pernambuco, Brazil

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    Carina Lucena Mendes-Marques

    2013-01-01

    Full Text Available After the worldwide cholera epidemic in 1993, permanent environmental monitoring of hydrographic basins was established in Pernambuco, Brazil, where cholera is endemic. After a quiescent period, 4 rfbN (serogroup O1 positive water samples that were culture negative were detected by multiplex single-tube nested PCR (MSTNPCR; 2 of these were also ctxA (cholera toxin positive. From May to June 2012, 30 V. cholerae O1 isolates were obtained by culturing samples. These isolates were analyzed for the presence of virulence genes by PCR, intergenic spacer region 16S-23S PCR (ISR-PCR, and pulsed field gel electrophoresis (PFGE. The isolates were positive for the rfbN gene and negative for the assessed pathogenic genes and were classified into 2 groups by ISR and the same profile by PFGE. Close genetic similarity was observed between them (2012 and environmental strains from 2004 to 2005, indicating the permanence of endemic V. cholerae O1 in the region.

  13. Cd, Cu, and Mn from Uruguay River Basin in Uruguaiana, RS, Brazil, and their toxicological potential for human leukocyte

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    Gislaine Rezer Costa

    2016-12-01

    Full Text Available This study assessed the limnology from the Medium Uruguay River Basin in Uruguaiana, Brazil, with a focus on the concentration of heavy metals (Cd, Cu, and Mn, to assess the toxicological potential (cytotoxicity and genotoxicity for humans using as biological matrix of study human leukocyte cells. The conductivity, resistivity, and dissolved O2 levels exceeded the limits recommended by the National Environmental Council (Conselho Nacional do Meio Ambiente - CONAMA. The percentage of non-viable human leukocyte cells exposed to water samples was approximately 20% higher than that of the negative control (<3%, but similar to the positive control. The DNA damage index was high for all heavy metal concentrations assayed when compared to the negative control 12±2.96, p < 0.0001, with a range of 155.66±23.89 to 194.33±23.23, but similar to the positive control (210.62±27.48. Moreover, the leukocyte degeneration index was higher in all samples containing heavy metals than in the negative control (4%, which demonstrates to be due the presence of Cu (11.8-12.5%, Cd (13-15.6%, and Mn (15.6-22.5%. Taken together, our results show that the quality from water samples analyzed is below than recommended by CONAMA and offers risk of contamination by heavy metals for the general population.

  14. Ichthyofauna of two streams (silted and reference) in the Upper Paraná river basin, Southeastern Brazil.

    Science.gov (United States)

    Casatti, L

    2004-11-01

    In this study the fish assemblages of the silted Aguas Claras stream (AC) was compared with that of a reference, the São Carlos stream (SC), so as to identify potential fish indicators of integrity or degradation. Both streams, located about 5 km from one another, are part of the Upper Paraná river basin, Brazil, and present similar physiographical features. Twenty-one species were collected in AC (1,271 specimens) and 18 in SC (940 specimens). In AC, dominant species e.g., Corydoras aeneus (sandy pools), Serrapinnus notomelas, and Pyrrhulina australis (warm marginal shallow pools) were those favored by new microhabitats linked to siltation and removal of the riparian vegetation. Changes in the composition of the marginal vegetation resulted in dominance of species such as Hisonotus francirochai (marginal grasses). In SC the dominant species was Phalloceros caudimacultus, abundant in marginal shallow pools, and Trichomycterus diabolus. and Hypostomus nigromaculatus, exclusively riffle-dwelling species, which were absent in AC. Fish assemblage monitoring is recommended for use in riparian management programs in order to evaluate negative instream sedimentation effects.

  15. First Ediacaran Fauna Occurrence in Northeastern Brazil (Jaibaras Basin, ?Ediacaran-Cambrian: Preliminary Results and Regional Correlation

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    FRANCISCO R.G. BARROSO

    2014-09-01

    Full Text Available This study reports the first known occurrence of the Ediacaran fauna in northeastern Brazil (at Pacujá Municipality, northwestern state of Ceará and presents preliminary interpretations of its significance. Regional correlation indicates that the fossils originated in the Jaibaras Basin and that they may represent a new geological system. The depositional environment can be attributed to a fluviomarine system. Nine Ediacaran species can be identified, including members of pandemic groups (e.g., Charniodiscus arboreus Glaessner, 1959; ?Charniodiscus concentricus Ford, 1958; Cyclomedusa davidi Sprigg, 1947; Ediacaria flindersi Sprigg, 1947; and Medusinites asteroides Sprigg, 1949 and endemic groups (e.g., Kimberella quadrata Glaessner & Wade, 1966; Palaeophragmodictya reticulata Gehling & Rigby, 1996; Parvancorina minchami Glaessner, 1958; and Pectinifrons abyssalis Bamforth, Narbonne, Anderson, 2008. Three ichnogenera are also present: Arenicolites Salter, 1857; Palaeophycus Hall, 1987; and Planolites Nicholson, 1873. The relative age of the deposits is between ?Ediacaran and Cambrian, and the fauna resembles the White Sea Assemblage. The bioturbation presents typical unbranched Ediacaran ichnogenera with little depth in the substrate. This previously unknown occurrence of the Ediacaran fauna reinforces the importance of the state of Ceará to Brazilian and global palaeontology.

  16. Composition, structure, origin, and evolution of off-axis linear volcanic structures of the Brazil Basin, South Atlantic

    Science.gov (United States)

    Skolotnev, S. G.; Peive, A. A.

    2017-01-01

    The paper considers the conditions and mechanisms of the formation of linear volcanic structures in the Brazil Basin, South Atlantic. Among these objects, those related to the ascent of deep mantle plumes predominate. It is shown that the ascent of melts from plume sources leads to the formation of (a) hot spot tracks in the form of linear volcanic ridges and (b) active hot lines in the form of submarine mountain chains with trends differing from those of hot spot tracks and with a more variable character of the age distribution of volcanic rocks. Fault tectonics affects the character of plume activity. In addition, plume material from a hot spot area is dragged by a moving plate as a flow or a sublithospheric lens, which leads to the long-term existence of particular independent segments of linear structures and sometimes to late volcanism reactivation within their limits. Decompression melting of the asthenospheric mantle in zones where thin lithosphere undergoes tension causes the formation of passive hot lines. The main mantle source for the considered volcanic rocks was a mixture of DMM and HIMU mantle components, with the latter abruptly dominating. In marginal oceanic regions, the EM1 component is also present (the EM2 component is found more rarely) within fragments of tectonically delaminated continental mantle that was trapped by the oceanic mantle during the breakup of Gondwana.

  17. Biochronostratigraphy and paleoenvironment analysis of Neogene deposits from the Pelotas Basin (well 2-TG-96-RS, Southernmost Brazil

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    WAGNER G. SILVA

    2015-09-01

    Full Text Available This paper presents the integration of micropaleontological (palynology and foraminifera and isotopic (87Sr/86Sr analysis of a selected interval from the well 2-TG-96-RS, drilled on the onshore portion of the Pelotas Basin, Rio Grande do Sul, Brazil. A total of eight samples of the section between 140.20 and 73.50 m in depth was selected for palynological analysis, revealing diversified and abundant palynomorph associations. Species of spores, pollen grains and dinoflagellate cysts are the most common palynomorphs found. Planktic and benthic calcareous foraminifera were recovered from the lowest two levels of the section (140.20 and 134.30 m. Based on the stratigraphic range of the species of dinoflagellate cysts and sporomorphs, a span age from Late Miocene to Early Pliocene is assigned. The relative age obtained from the 87Sr/86Sr ratio in shells of calcareous foraminifers indicates a Late Miocene (Messinian correspondence, corroborating the biostratigraphic positioning performed with palynomorphs. Paleoenvironmental interpretations based on the quantitative distribution of organic components (palynomorphs, phytoclasts and amorphous organic matter throughout the section and on foraminiferal associations indicate a shallow marine depositional environment for the section. Two palynologicals intervals were recognized based on palynofacies analysis, related to middle to outer shelf (140.20 to 128.90 m and inner shelf (115.75 to 73.50 m conditions.

  18. Pedogenic calcretes within fracture systems and beddings in Neoproterozoic limestones of the Irecê Basin, northeastern Brazil

    Science.gov (United States)

    Borges, S. V. F.; Balsamo, F.; Vieira, M. M.; Iacumin, P.; Srivastava, N. K.; Storti, F.; Bezerra, F. H. R.

    2016-07-01

    Calcretes or caliches are continental limestones developed by surficial weathering process that takes place mostly in arid and semi-arid regions. In the Irecê Basin, northeastern Brazil, in addition to the regular occurrence of pedogenic calcretes, a peculiar type of structurally controlled calcretes occurs on Neoproterozoic limestones. These peculiar calcretes developed near the surface and occur (1) between layers, (2) inside fractures and (3) within major thrust faults. Fieldwork on selected outcrops was integrated with petrographic, mineralogic, geochemical, density and mercury intrusion porosity analyses to constrain the environment of formation and their petrophysical properties. The results revealed that this type of calcrete is the product of multiepisodic events of dissolution and precipitation occurring during the wet and dry seasons in the region along fractures and beddings. Based on the petrophysical results, we suggest that these calcretes may have an important role in the migration of fluids through the impermeable host carbonate rock and that they act as a conduit for fluid flow, as revealed by their high porosity (mean value = 26%) and remarkable pore connectivity.

  19. A new species of the Hypostomus cochliodongroup (Siluriformes: Loricariidae from the rio Aripuanã basin in Brazil

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    Cláudio H. Zawadzki

    Full Text Available A new species of Hypostomus, H. dardanelos, is described from the rio Aripuanã basin, a southern tributary to the rio Madeira, in northern Mato Grosso State, Brazil. The new species is assigned to the Hypostomus cochliodon group by the possession of few teeth, spoon-shaped teeth, angle between dentaries usually less than 80°, and by the absence of a notch between hyomandibular and the metapterygoid. The new species can be diagnosed from its congeners by its unique color pattern of yellowish-brown ground color covered by well-defined dark spots of relatively equal size, evenly spaced and moderately set along the dorsal region of the body and fins, except on the ventrolateral region of the caudal peduncle and proximal region of anal and caudal fins, which are devoid of spots. The new species is further diagnosed by having teeth with very small lateral cusp, fused to the mesial one and almost imperceptible; by the absence of medial buccal papillae, and by nuptial odontodes all along the body (odontodes more pronounced in some few larger specimens.

  20. Structural styles of the intracratonic reactivation of the Perimbó fault zone, Paraná basin, Brazil

    Science.gov (United States)

    Rostirolla, Sidnei Pires; Mancini, Fernando; Rigoti, Augustinho; Kraft, Ronaldo Paulo

    2003-08-01

    The style and origin of intracratonic deformation along the Perimbó fault zone (PFZ) in the Paraná basin, Santa Catarina State, southern Brazil, is defined by the integration of outcrop, borehole, aerial photography, and digital terrain modeling data. Typical structures are high-angle strike-slip and oblique-slip normal faults in the Permian sedimentary cover that propagate upward from medium-angle reverse faults in the underlying Precambrian basement. Regional and minor structures suggest blind transtensional faulting and tilting of the overlying strata controlled by the basement heritage. A hypothesis linking deformation between the cover and the basement is proposed on the basis of a structural analysis of a branched fault pattern striking N40-50E and N70-80E. Semi-detailed scale mapping shows that the PFZ has a complex history of polyphase reactivation and is characterized as a plate margin fault in the Proterozoic, evolving to an intracratonic fault in the Phanerozoic, with a main period of reactivation in Permian or Permian-Triassic transition times. The reported data imply that fault reactivation is characterized by normal to left-lateral strike-slip faulting produced by strain propagation from the La Ventana orogenic belt toward the continental interior.

  1. Cytogenetic analysis in Thoracocharax stellatus (Kner, 1858 (Characiformes, Gasteropelecidae from Paraguay River Basin, Mato Grosso, Brazil

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    Edson Silva

    2012-09-01

    Full Text Available Thoracocharax stellatus (Characiformes, Gasteropelecidae is a small Neotropical species of fish, widely distributed in several rivers of South America. Evidence for karyotype heteromorphysm in populations from different geographical regions has been reported for this species. In this way, populations of T. stellatus from the Paraguay River basin were cytogenetically characterized and the results were compared with other studies performed in the same species but from different basins. The results showed a diploid number of 2n = 54 for T. stellatus, with chromosomes arranged in 6 metacentric (m, 6 submetacentric (sm, 2 subtelocentric (st and 40 acrocentric (a, for both sexes, with a simple Nucleolus Organiser Region (NOR system reported by the techniques of silver nitrate impregnation and fluorescent in situ hybridisation (FISH using 18S rDNA sequences as probe. The distribution of constitutive heterochromatin, observed by the C-band technique and Chromomycin A3 staining showed great similarity among the analyzed populations and consists mainly of discrete blocks in the pericentromeric and telomeric regions of most chromosomes. The presence of female heterogamety was also observed indicating a ZZ/ZW system with W chromosome almost totally heterochromatic. The results also show cytogenetic diversity of the group and are useful to understand the mechanisms of karyotype evolution of the family.

  2. A 4D-variational ocean data assimilation application for Santos Basin, Brazil

    Science.gov (United States)

    da Rocha Fragoso, Mauricio; de Carvalho, Gabriel Vieira; Soares, Felipe Lobo Mendes; Faller, Daiane Gracieli; de Freitas Assad, Luiz Paulo; Toste, Raquel; Sancho, Lívia Maria Barbosa; Passos, Elisa Nóbrega; Böck, Carina Stefoni; Reis, Bruna; Landau, Luiz; Arango, Hernan G.; Moore, Andrew M.

    2016-03-01

    Aiming to achieve systematic ocean forecasting for the southeastern Brazilian coast, an incremental 4D-Var data assimilation system is applied to a regional ocean model focused mainly in the Santos Basin region. This implementation is performed within the scope of The Santos Basin Ocean Observing System (or Project Azul), a pilot project designed to collect oceanographic data with enough frequency and spatial coverage so to improve regional forecasts through data assimilation. The ocean modeling and data assimilation system of Project Azul is performed with the Regional Ocean Modeling System (ROMS). The observations used in the assimilation cycles include the following: 1-day gridded, 0.1° resolution SST from POES AVHRR; 1-day gridded, 0.3° composite of the MDT SSH from AVISO; and surface and subsurface hydrographic measurements of temperature and salinity collected with gliders and ARGO floats from Project Azul and from UK Met-Office EN3 project dataset. The assimilative model results are compared to forward model results and independent observations, both from remote sensing and in situ sources. The results clearly show that 4D-Var data assimilation leads to an improvement in the skill of ocean hindcast in the studied region.

  3. Urbanization and runoff in the Tucunduba hydrographic basin, Belém, PA, Brazil

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    Nelson Wellausen Dias

    2012-08-01

    Full Text Available The present work investigated the runoff resulting from urban sprawl in the area of Tucunduba basin, in Belem, in the period between 1972 and 2006, which is characterized by a urbanization process started in the 1960s by low income population without adequate infrastructure services. Urbanization modifies the soil surface interfering on the ground phase of the hydrological cycle, inasmuch as it reduces the area of infiltration, increases runoff, and the runoff coefficient. A geographic database with land use and land cover map layers extracted from orthophotos acquired in 1972, 1977, and 1998 and a SPOT satellite image acquired in 2006 were used. Digital maps and analysis of the urbanization processes were supported by tools available in ArcGIS™ software package. To estimate the infiltration potential (S and effective rainfall (Pe, as a function of rainfall duration equal to the maximum time of concentration of the water in the basin, Curve Number methodology proposed by the Natural Resources Conservation Service (NRCS was applied. Rainfall estimates were calculated using the maximum rain equation for the city of Belém, with return times specified at 2, 5, 10, 15, 20, 25, 50, 100, and 200 years. The results showed an increase in areas of high and medium population density (urban and reduced area of low population density (secondary forest growth for the years of 1972, 1977, 1998, and 2006, that generated a higher effective precipitation value and, therefore, a higher effective runoff coefficient value (C.

  4. DEVELOPING SUSTAINABILITY INDICATORS FOR WATER RESOURCES MANAGEMENT IN TIETÊ-JACARÉ BASIN, BRAZIL

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    Michele de Almeida Corrêa

    2013-01-01

    Full Text Available This paper describes a tool to assist in developing water resources management, focusing on the sustainability concept, by a Basin Committee. This tool consists of a set of sustainability indicators for water resources management denominated CISGRH, which was identified by a conceptual and empirical review to meet the specific needs of the study herein - the basin committee of Tietê-J acaré Rivers (CBH-TJ. The framework of CISGRH came about through consecutive consultation processes. In the first consultation, the priority problems were identified for the study objectives, listing some possible management sustainability indicators. These preliminary indicators were also submitted to academic specialists and technicians working in CBH-TJ for a new consultation process. After these consultation stages, the CISGRH analysis and structuring were introduced. To verify the indicators’ adaptation and to compose a group as proposed by the study, these were classified according to specific sustainability principles for water resources management. The objective of the CISGRH implementation is to diagnose current conditions of water resources and its management, as well as to evaluate future conditions evidenced by tendencies and interventions undertaken by the committee.

  5. Tectonics and paleogeography of the Marajó Basin, northern Brazil

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    JOÃO B. S. COSTA

    2002-09-01

    Full Text Available The Marajó Basin area presents geologic and geomorphologic features chiefly due to the Mesozoic extension and post-Miocene neotectonics. The extension event with an Early and a Late Cretaceous phases originated four sub-basins that constitutes the Marajó Basin, with a thick continental clastic sequence showing marine influence. NW and NNW normal faults and NE and ENE strike-slip faults controlled the basin geometry. The extension, related to the Equatorial Atlantic opening, propagated into the continent along crustal weakness zones of the Precambrian Tumucumaque, Amapá and Araguaia orogenic belts. The neotectonic event is a strike-slip regime which developed transtensional basins filled in by Upper Tertiary shallow marine (Pirabas Formation and transitional sequences (Barreiras Group, followed by Quaternary fluvial deposits and transitional sequences derived from the Amazon and Tocantins rivers and the Marajoara estuary. The current landscape has a typical estuarine morphology. The coast morphology presents sea-cliffs on transitional Upper Tertiary sequences, while inwards dominate hills sustained by Mid-Pleistocene lateritic crust, with a flat erosive surface at 70 m. In the eastern Marajó Island several generations of paleochannels associated with fluvial-estuarine sequences are recognized, while a fluvial-marine plain is widespread on its western side.A área da Bacia do Marajó apresenta feições geológicas e geomorfológicas devidas principamente à distensão Mesozóica e à neotectônica pós-miocênica. O evento de distensão, com fases do Cretáceo Inferior e Superior, originou quatro sub-bacias que contituem a Bacia do Marajó, com uma espessa seqüência clástica continental mostrando influência marinha. Falhas normais NW e NNW e direcionais NE e ENE controlaram a geometria da bacia. A distensão, relacionada com a abertura do Atlântico Equatorial, propagou-se continente adentro ao longo de zonas de fraqueza crustal dos

  6. Lepidopterans and their parasitoids on okra plants in Riberão Preto (SP, Brazil Lepidópteros e seus parasitoides em cultura de quiabo em Ribeirão Preto, SP, Brasil

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    Rogéria Inês Rosa Lara

    2012-04-01

    Full Text Available The aim of this study was to identify the defoliating lepidopterans and their parasitoids occurring on okra plants in the district of Riberão Preto city (SP. Brazil. Caterpillars were collected by hand from an experimental field of okra, in March and April, 2009. They were placed individually on Petri dishes lined with wet filter paper, containing shredded okra leaves, and kept in a climactic chamber (25±1°C, 12:12h light/dark photoperiod, RH 70±10% until the emergence of lepidopterans and/or parasitoids. In all, 63 lepidopterans were obtained: three species of Noctuidae, Anomis flava (Fabricius, Spodoptera frugiperda (Smith and Pseudoplusia includens (Walker; one of Pieridae, Ascia monuste orseis (Godart, and an unidentified species of Tortricidae. One unidentified tachinid fly (Diptera and the Hymenoptera parasitoids Copidosoma floridanum (Ashmead (Encyrtidae and Euplectrus sp. (Eulophidae emerged from A. flava, while C. floridanum and an unidentified tachinid, from P. includens. This is the first report of an association between the herbivores S. frugiperda, P. includens and A. monuste orceis, the parasitoids C. floridanum and Euplectrus sp. on okra plants.Este estudo objetivou identificar lepidópteros desfolhadores e seus parasitoides em cultura de quiabo em Ribeirão Preto, SP, Brasil. As lagartas foram coletadas através de catação manual entre março e abril de 2009, individualizadas em placas de Petri forradas com papel filtro umedecido contendo pedaços de folhas de quiabo e mantidas sob condições controladas (25±1°C, 12 horas de fotofase, 70±10% de UR até a obtenção dos adultos de lepidópteros e/ou de seus parasitoides. Foram obtidos 63 adultos de lepidópteros: três espécies de Noctuidae, Anomis flava (Fabricius, Spodoptera frugiperda (Smith, Pseudoplusia includens (Walker, uma de Pieridae, Ascia monuste orseis (Godart e uma de Tortricidae não identificada. Uma espécie não identificada de taquinídeo (Diptera e os

  7. Two new species of Pseudancistrus (Siluriformes, Loricariidae from the Amazon basin, northern Brazil

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    Gabriel da Costa e Silva

    2015-02-01

    Full Text Available Two new species of Pseudancistrus, a genus diagnosed by non-evertible cheek plates and hypertrophied odontodes along the snout margin, are described from two drainages of the Brazilian Shield: P. kayabi from the rio Teles Pires (rio Tapajós basin and P. asurini from the rio Xingu. The new species are distinguished from congeners (P. barbatus, P. corantijniensis, P. depressus, P. nigrescens, P. reus, and P. zawadzkii by the coloration pattern. Pseudancistrus kayabi has dark bars on the dorsal and caudal fins which are similar to that of P. reus from the Caroní River, Venezuela. Pseudancistrus asurini is unique among Pseudancistrus in having whitish tips of the dorsal and caudal fins in juveniles to medium-sized adults.

  8. Spectroscopic Analysis of a Theropod Dinosaur (Reptilia, Archosauria from the Ipubi Formation, Araripe Basin, Northeastern Brazil

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    João Hermínio da Silva

    2013-01-01

    Full Text Available The Araripe Sedimentary Basin is known by the excellence of its fossils, regarding the preservation, diversity, and quantity. Here, we present a spectroscopic analysis using several experimental techniques (X-ray energy dispersion spectroscopy, Fourier-transform infrared spectroscopy as well as X-ray diffraction and thermogravimetric analysis applied in small fragments of bones from the posterior members of a theropod dinosaur. The results agree regarding the different composition of the stone matrix and the fossilized bone, indicating a partial substitution of the material by elements present in the depositional environment. However, differently from what is believed to occur, there is evidence that pyritization is not the only mechanism of fossilization for a specimen of Ipubi formation, but calcification, additionally, plays an important role in the fossil production of this Formation.

  9. Soil classification of the Piauitinga river basin spring areas, Sergipe, Brazil

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    Robério Anastácio Ferreira

    2012-04-01

    Full Text Available The study of regeneration and maintenance of spring areas is fundamentally important for the conservation of water resources. Considering the need for restoration of the surrounding areas of the springs of the sub-basin of the Piauitinga River, in Lagarto-Sergipe, this study aimed to characterize the soils in their local environment which will serve as a benchmark for future comparisons between areas of springs already degraded and in the recovering process. The springs were classified according to their origin and their stage of preservation. For the study of the local soil, reforested areas of each spring were selected and grouped according to their position in the landscape. The soil classification of the study sites was performed based on local landscape observation, description of opened micro-trenches and analyses of soil samples. The soils were described and classified morphologically. It was observed that from 22 analyzed spring areas, only two (9% were considered according to their origin as diffuse and the remaining twenty (91% as punctual. Considering the preservation stage five spring areas (22% were identified as disturbed and the other ones as degraded (88%. The sites around the springs’ headwaters of the upper course of the Piauitinga river basin are located in erosion spots, depressions and a single case in the foothills coastal tablelands. The most striking characteristics of local soils are the strong hydromorphic (Gleissolos and gleic Cambisols and, or, the low level of development (Cambisols and Plinthosols, both with much skeletal material, many of them in eroded phase.

  10. Viruses Surveillance Under Different Season Scenarios of the Negro River Basin, Amazonia, Brazil.

    Science.gov (United States)

    Vieira, Carmen Baur; de Abreu Corrêa, Adriana; de Jesus, Michele Silva; Luz, Sérgio Luiz Bessa; Wyn-Jones, Peter; Kay, David; Vargha, Marta; Miagostovich, Marize Pereira

    2016-03-01

    The Negro River is located in the Amazon basin, the largest hydrological catchment in the world. Its water is used for drinking, domestic activities, recreation and transportation and water quality is significantly affected by anthropogenic impacts. The goals of this study were to determine the presence and concentrations of the main viral etiological agents of acute gastroenteritis, such as group A rotavirus (RVA) and genogroup II norovirus (NoV GII), and to assess the use of human adenovirus (HAdV) and JC polyomavirus (JCPyV) as viral indicators of human faecal contamination in the aquatic environment of Manaus under different hydrological scenarios. Water samples were collected along Negro River and in small streams known as igarapés. Viruses were concentrated by an organic flocculation method and detected by quantitative PCR. From 272 samples analysed, HAdV was detected in 91.9%, followed by JCPyV (69.5%), RVA (23.9%) and NoV GII (7.4%). Viral concentrations ranged from 10(2) to 10(6) GC L(-1) and viruses were more likely to be detected during the flood season, with the exception of NoV GII, which was detected only during the dry season. Statistically significant differences on virus concentrations between dry and flood seasons were observed only for RVA. The HAdV data provides a useful complement to faecal indicator bacteria in the monitoring of aquatic environments. Overall results demonstrated that the hydrological cycle of the Negro River in the Amazon Basin affects the dynamics of viruses in aquatic environments and, consequently, the exposure of citizens to these waterborne pathogens.

  11. Aphaereta sp. (Hymenoptera: Braconidae: Alysiinae) as a natural enemy to Peckia chrysostoma (Wiedemann) (Diptera: Sarcophagidae), in Brazil.

    Science.gov (United States)

    Marchiori, C H; Pereira, L A; Filho, O M

    2003-02-01

    This paper reports the first occurence of the parasite Aphaereta sp. (Hymenoptera: Braconidae: Alysiinae) which was collected from Peckia chrysostoma pupae (Diptera: Sarcophagidae) by means of traps containing some fish baits in a wood area close to the Agronomy college (Faculdade of Agronomia) in Itumbiara, Goiás, in the period from March to September, 2001. A total of 362 gregarious specimens of parasitoids from 26 pupae of P. chrysostoma. Aphaereta sp. was collected, with several individuals emerging from the same pupae.

  12. Hydro-Economic Modeling with Minimum Data Requirements: An Application to the São Francisco River Basin, Brazil

    Science.gov (United States)

    Torres, M.; Maneta, M.; Vosti, S.; Wallender, W.; Howitt, R.

    2008-12-01

    Policymakers have been charged with the efficient, equitable, and sustainable use of water resources of the São Francisco River Basin (SFRB), Brazil, and also with the promotion of economic growth and the reduction of poverty within the basin. To date, policymakers lack scientific evidence on the potential consequences for growth, poverty alleviation or environmental sustainability of alternative uses of water resources. To address these key knowledge gaps, we have linked a hydrologic and an economic model of agriculture to investigate how economic decisions affect available water, and vice versa. More specifically, the models are used to predict the effects of the application of Brazilian federal surface water use policies on farmer's net revenues and on the hydrologic system. The Economic Model of Agriculture. A spatially explicit, farm-level model capable of accommodating a broad array of farm sizes and farm/farmer characteristics is developed and used to predict the effects of alternative water policies and neighbors' water use patterns on crop mix choice. A production function comprised of seven categories of non-water-related inputs used in agriculture (land, fertilizers, pesticides, seeds, hired labor, family labor and machinery) and four water-related inputs used in agriculture (applied water, irrigation labor, irrigation capital and energy) is estimated. The parameters emerging from this estimated production function are then introduced into a non-linear, net revenue maximization positive mathematical programming algorithm that is used for simulations. The Hydrological Model. MIKE Basin, a semi-distributed hydrology model, is used to calculate water budgets for the SFRB. MIKE Basin calculates discharge at selected nodes by accumulating runoff down the river network; it simulates reservoirs using stage-area-storage and downstream release rule curves. The data used to run the model are discharge to calculate local runoff, precipitation, reference ET, crop

  13. Neogene vegetation development in the Amazon Basin: evidence from marine well-2, Foz do Amazonas (Brazil)

    Science.gov (United States)

    Bogota-Angel, Raul; Chemale Junior, Farid; Davila, Roberto; Soares, Emilson; Pinto, Ricardo; Do Carmo, Dermeval; Hoorn, Carina

    2014-05-01

    Origen and development of the highly diverse Amazon tropical forest has mostly been inferred from continental sites. However, sediment records in the marine Foz do Amazonas Basin can provide important information to better understand the influence of the Andes uplift and climate change on its plant biomes evolution since the Neogene. Sediment analyses of samples from BP-Petrobras well 1 and 2, drilled in the Amazon Fan, allowed to infer the onset of the transcontinental Amazon river and the fan phase during the middle to late Miocene (c. 10.5 Ma). As part of the CLIMAMAZON research programme we performed pollen analysis on the 10.5 to 0.4 Ma time interval. 76 ditch cutting samples of the upper 4165 m sediments of well 2 permitted us to infer changes in floral composition in the Amazon Basin. The palynological spectra across this interval (nannofossil based age model) include pollen, fern spores, dinocysts and foram lignings. When possible pollen and fern spores were grouped in four vegetation types: estuarine, tropical, mountain forest and high mountain open treeless vegetation. Pollen is generally corroded and reflects the effects of sediment transportation while reworked material is also common. Good pollen producers such as Poaceae, Asteraceae and Cyperaceae are common and reflect indistinctive vegetation types particularly those associated to riverine systems. Rhizophora/Zonocostites spp. indicate "close-distance" mangrove development. Tropical forest biomes are represented by pollen that resemble Moraceae-Urticaceae, Melastomataceae-Combretaceae, Sapotaceae, Alchornea, Euphorbiaceae, Rubiaceae, Bignoniaceae, Mauritia and Arecaceae. Myrica, and particularly sporadic occurrences of fossil fern spores like Lophosoria, and Cyathea suggest the development of a moist Andean forest in areas above 1000 m. First indicators of high altitudes appear in the last part of late Miocene with taxa associated to current Valeriana and particularly Polylepis, a neotropical taxon

  14. Influence of stocking density and culture management on growth and mortality of the mangrove native oyster Crassostrea sp. in southern Brazil

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    João Guzenski

    2007-09-01

    Full Text Available This study analyzed the growth and survival of the mangrove native oyster Crassostrea sp. in the initial stages of culture (nursery and intermediate culture submitted to different treatments of stocking density and cleaning management for 5 months, in Florianópolis/SC, southern Brazil. Treatments consisted of two cleaning managements (every 7 or 14 days and two initial stocking densities (1,000 and 2,000 seeds per tray. After every thinning, densities were kept proportional per area, according to oyster growth. All treatments showed excellent results, but the best growth rate (9.9mm per month was observed in the treatment with high stocking density and long cleaning interval, with a final height of 60mm and allometric shell growth. A low mortality rate (7.5% suggests good conditions of the area and of the native oyster for the grow-out of hatchery-reared spats.

  15. Water quality of the Canchim’s creek watershed in São Carlos, SP, Brazil, occupied by beef and dairy cattle activities

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    Odo Primavesi

    2002-06-01

    Full Text Available The Canchim’s creek watershed in São Carlos, SP, Brazil, was chosen to evaluate water quality affected by dairy and beef cattle production systems based on tropical pasture. The water samples were collected monthly, during three years, at six sampling points: spring in a tropical forest, spring in an intensive dairy production system, two dam springs, and stream water upward and at the delta. Results showed differences (P<0.01 among sampling points for the mean parameters. True color, hardness, turbidity, electric conductivity, alkalinity, pH, chemical oxygen demand and consumed oxygen explained well differences among sampling points. According to current legislation standards, water quality fitted with most of the established parameters for class 2, with exception of phosphate and iron. The high levels of total phosphorus, except in the forest spring, classified this water in an eutrophic class, even where soil and water conservation practices were considered adequate.

  16. Water quality of the Canchim?s creek watershed in São Carlos, SP, Brazil, occupied by beef and dairy cattle activities

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    Primavesi Odo

    2002-01-01

    Full Text Available The Canchim?s creek watershed in São Carlos, SP, Brazil, was chosen to evaluate water quality affected by dairy and beef cattle production systems based on tropical pasture. The water samples were collected monthly, during three years, at six sampling points: spring in a tropical forest, spring in an intensive dairy production system, two dam springs, and stream water upward and at the delta. Results showed differences (P<0.01 among sampling points for the mean parameters. True color, hardness, turbidity, electric conductivity, alkalinity, pH, chemical oxygen demand and consumed oxygen explained well differences among sampling points. According to current legislation standards, water quality fitted with most of the established parameters for class 2, with exception of phosphate and iron. The high levels of total phosphorus, except in the forest spring, classified this water in an eutrophic class, even where soil and water conservation practices were considered adequate.

  17. Infecção natural de Lutzomyia longipalpis por Leishmania sp. em Teresina, Piauí, Brasil Natural infection of Lutzomyia longipalpis by Leishmania sp. in Teresina, Piauí State, Brazil

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    Jackellyne Geórgia Dutra e Silva

    2007-07-01

    Full Text Available No Brasil, o controle do vetor Lutzomyia longipalpis é uma das principais estratégias utilizadas para limitar a expansão da leishmaniose visceral americana. Entretanto, poucos são os estudos sobre a infecção natural destes flebotomíneos por espécies de Leishmania. Um estudo sobre a infecção natural de Lu. longipalpis por Leishmania sp. foi realizado no bairro Bela Vista, Teresina, Piauí, um dos principais focos urbanos da leishmaniose visceral americana no Brasil. Entre fevereiro de 2004 e janeiro de 2005 realizaram-se 180 capturas usando-se armadilhas luminosas do tipo CDC. Foram dissecadas e examinadas, em média, dez fêmeas por captura para detecção de formas evolutivas de Leishmania sp., identificando-se 1.832 exemplares de Lu. longipalpis e seis de Lu. whitmani. Vinte (1,1% espécimes, todas de Lu. longipalpis, estavam infectadas com as formas procíclica e nectomonada de Leishmania sp., localizadas, principalmente, na porção posterior do trato digestivo. O maior percentual de insetos infectados foi encontrado quatro meses após o período de maior precipitação pluviométrica, sugerindo que variáveis climáticas podem contribuir para a predição não apenas da abundância destes dípteros, mas também do seu grau de infecção natural.In Brazil, control of the vector Lutzomyia longipalpis is one of the main strategies used to limit the expansion of American visceral leishmaniasis. However, studies on the ecology of this sand fly are rare, especially regarding its natural infection with species of Leishmania. A study of the natural infection of Lu. longipalpis by Leishmania sp. was carried out in the Bela Vista neighborhood in the city of Teresina, Piauí State, Brazil, an important area of American visceral leishmaniasis transmission. From February 2004 to January 2005, sand flies were captured with CDC light traps. Approximately 10 female sand flies in each capture were dissected and examined for the presence of

  18. Detection of Neospora sp. antibodies in cart horses from urban areas of Curitiba, Southern Brazil Detecção de anticorpos anti-Neospora sp. em cavalos de carroceiros de áreas urbanas de Curitiba, Sul do Brasil

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    Eliana Monteforte Cassaro Villalobos

    2012-03-01

    Full Text Available Neospora caninum is a protozoan parasite which affects dogs as definitive hosts and several mammalian species as intermediate hosts mainly causing abortions and central nervous system disorders. The reemerging population of cart horses for carrying recycling material in urban areas of major cities in Brazil may have an impact on disease spreading, and these animals may be used as sentinels for environmental surveillance. Thus, the present study investigated the frequency of Neospora sp. antibodies in cart horses from Curitiba and surrounding areas, Paraná State, Southern Brazil. IgG antibodies against Neospora sp. were detected using indirect fluorescence antibody test (IFAT, and titers equal to or higher than 1:50 were considered reactive. Of all samples, 14/97 (14.4% were positive: 2/29 (6.9% were younger than 5; 5/26 (19.2% between 6 and 9; and 6/31 (19.4% older than 10 years of age. One of the 11 animals with unknown age was positive (9.1%. Cart horses are likely to be more exposed to dog feces and to Neospora sp. oocyst contamination in urban settings and a lower frequency of disease in dogs may have a negative impact on horse infection risk in these areas.Neospora caninum é um protozoário parasita que afeta cães como hospedeiros definitivos e diversos mamíferos como hospedeiros intermediários, envolvido em abortos e distúrbios do sistema nervoso central. A população reemergente de cavalos de carroceiros utilizados para transportar material reciclável em áreas urbanas de grandes cidades brasileiras na disseminação de doenças, e estes animais podem ser utilizados como sentinelas para vigilância ambiental. Deste modo, no presente estudo foi investigada a frequência de anticorpos anti-Neospora sp. em cavalos de carroceiros da Região Metropolitana de Curitiba, Estado do Paraná, Sul do Brasil. Anticorpos da classe IgG anti-Neospora sp. foram detectados utilizando a reação de imunofluorescência indireta (RIFI, e t

  19. Spatial variability of soil carbon stock in the Urucu river basin, Central Amazon-Brazil.

    Science.gov (United States)

    Ceddia, Marcos Bacis; Villela, André Luis Oliveira; Pinheiro, Érika Flávia Machado; Wendroth, Ole

    2015-09-01

    The Amazon Forest plays a major role in C sequestration and release. However, few regional estimates of soil organic carbon (SOC) stock in this ecoregion exist. One of the barriers to improve SOC estimates is the lack of recent soil data at high spatial resolution, which hampers the application of new methods for mapping SOC stock. The aims of this work were: (i) to quantify SOC stock under undisturbed vegetation for the 0-30 and the 0-100 cm under Amazon Forest; (ii) to correlate the SOC stock with soil mapping units and relief attributes and (iii) to evaluate three geostatistical techniques to generate maps of SOC stock (ordinary, isotopic and heterotopic cokriging). The study site is located in the Central region of Amazon State, Brazil. The soil survey covered the study site that has an area of 80 km(2) and resulted in a 1:10,000 soil map. It consisted of 315 field observations (96 complete soil profiles and 219 boreholes). SOC stock was calculated by summing C stocks by horizon, determined as a product of BD, SOC and the horizon thickness. For each one of the 315 soil observations, relief attributes were derived from a topographic map to understand SOC dynamics. The SOC stocks across 30 and 100 cm soil depth were 3.28 and 7.32 kg C m(-2), respectively, which is, 34 and 16%, lower than other studies. The SOC stock is higher in soils developed in relief forms exhibiting well-drained soils, which are covered by Upland Dense Tropical Rainforest. Only SOC stock in the upper 100 cm exhibited spatial dependence allowing the generation of spatial variability maps based on spatial (co)-regionalization. The CTI was inversely correlated with SOC stock and was the only auxiliary variable feasible to be used in cokriging interpolation. The heterotopic cokriging presented the best performance for mapping SOC stock.

  20. Instream flow and water availability in the Rio das Pedras basin, Guarapuava-PR, Brazil

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    Ederson Dias de Oliveira

    2012-12-01

    Full Text Available Knowledge of instream flow is of paramount importance to determine water availability for water resources management. This study estimated instream flow and evaluated water availability in the stretch of the Rio das Pedras, which supplies water to Guarapuava, a town in the mid-southern region of the state of Paraná, Brazil. Several different methods were employed to obtain instream flow, a reference discharge for water consumption permit, and the river regime. Methods comprised 7-day mean minimum with a 10-year return period, discharges associated to 95% and 90% permanence, yearly 7-day mean minimum discharge and basic water discharge. Discharge data were obtained from the meteorological station at the Water Station of Guarapuava (ETA. Results show that yearly river debit between 1985 and 2009 had a daily mean of 9.12 m³ s-1 and a median discharge of 9.16 m³ s-1. Estimated instream flow, measured by methods used for the Rio das Pedras stretch, ranged from 1.72 to 2.74 m³ s-1, with an average of 2.20 m³ s-1 and a coefficient of variation of 19.5%. Discharge for the stretch was estimated as 0.91 m³ s-1, following criteria used in the state of Paraná. The relationship of the evaluated stretch between daily flow and the intake volume granted by the government revealed the inefficiency of the applied methods for instream flow assessment. In fact, they failed to warrant a minimum water volume required for the conservation of the river ecosystem.

  1. Endocrine disruptors in water filters used in the Rio dos Sinos Basin region, Southern Brazil.

    Science.gov (United States)

    Furtado, C M; von Mühlen, C

    2015-05-01

    The activated carbon filter is used in residences as another step in the treatment of drinking water, based on a physical-chemical process to absorb pollutants that are not removed in conventional treatment. Endocrine disruptors (EDCs) are exogenous substances or mixtures of substances that acts on the endocrine system similarly to the endogenously produced hormones, triggering malfunctions and harmful changes to human and animal health. The objective of the present work was to study EDCs through semi-quantitative analysis of residential water filters collected in the region of Rio dos Sinos basin, focusing on two specific classes: hormones and phenols. The solid phase extraction principle was used for the extraction of compounds and gas chromatography coupled with mass spectrometry for the separation and characterization of EDCs. Four samples of residential filters collected from public water distribution and artesian wells, from the cities of Novo Hamburgo and São Leopoldo were analysed. Using the developed methodology, it was possible to detect and comparatively quantify selected EDCs in all studied samples, which indicates the presence of these contaminants in drinking water from different sources.

  2. Geochemical behavior and dissolved species control in acid sand pit lakes, Sepetiba sedimentary basin, Rio de Janeiro, SE - Brazil

    Science.gov (United States)

    Marques, Eduardo D.; Sella, Sílvia M.; Bidone, Edison D.; Silva-Filho, Emmanoel V.

    2010-12-01

    This work shows the influence of pluvial waters on dissolved components and mineral equilibrium of four sand pit lakes, located in the Sepetiba sedimentary basin, SE Brazil. The sand mining activities promote sediment oxidation, lowering pH and increasing SO 4 contents. The relatively high acidity of these waters, similar to ore pit lakes environment and associated acid mine drainage, increases weathering rate, especially of silicate minerals, which produces high Al concentrations, the limiting factor for fish aquaculture. During the dry season, basic cations (Ca, Mg, K and Na), SiO 2 and Al show their higher values due to evapoconcentration and pH are buffered. In the beginning of the wet season, the dilution factor by rainwater increases SO 4 and decreases pH values. The aluminum monomeric forms (Al(OH) 2+ and Al(OH) 2+), the most toxic species for aquatic organisms, occur during the dry season, while AlSO 4+ species predominate during the wet season. Gibbsite, allophane, alunite and jurbanite are the reactive mineral phases indicated by PHREEQC modeling. During the dry season, hydroxialuminosilicate allophane is the main phase in equilibrium with the solution, while the sulphate salts alunite and jurbanite predominate in the rainy season due to the increasing of SO 4 values. Gibbsite is also in equilibrium with sand pit lakes waters, pointing out that hydrolysis reaction is a constant process in the system. Comparing to SiO 2, sulphate is the main Al retriever in the pit waters because the most samples (alunite and jurbanite) are in equilibrium with the solution in both seasons. This Al hydrochemical control allied to some precaution, like pH correction and fertilization of these waters, allows the conditions for fishpond culture. Equilibrium of the majority samples with kaolinite (Ca, Mg, Na diagrams) and primary minerals (K diagram) points to moderate weathering rate in sand pit sediments, which cannot be considered for the whole basin due to the anomalous

  3. Shallow lacustrine system of the Permian Pedra de Fogo Formation, Western Gondwana, Parnaíba Basin, Brazil

    Science.gov (United States)

    Araújo, Raphael Neto; Nogueira, Afonso César Rodrigues; Bandeira, José; Angélica, Rômulo Simões

    2016-04-01

    The Permian Period of the Parnaíba Basin, northern Brazil, represented here by deposits from the Pedra de Fogo Formation, records important events that occurred in Western Gondwana near its boundary with the Mesozoic Era. The analysis of outcrop based facies from the Permian Pedra de Fogo Formation, which is 100 m thick, carried out along the eastern and western borders of the Parnaiba Basin, allowed the identification of eleven sedimentary facies, which were grouped into three distinct facies associations (FA), representative of a shallow lacustrine system associated with mudflats and ephemeral rivers. Bioturbation, desiccation cracks, silcretes and various siliceous concretions characterize the Pedra de Fogo deposits. The FA1 mudflat deposits occur predominantly at the base of the Pedra de Fogo Formation and consist of laminated claystone/mudstone, mudcrack-bearing sandstones/mudstones and sandstones exhibiting cross-lamination, massive and megaripple bedding. Popcorn-like silicified nodules and casts indicate evaporite deposits. Other common features are silica concretions, silicified tepees and silcretes. FA2 represents nearshore deposits and consists of fine-grained sandstones with evenly parallel lamination, climbing ripple cross-lamination, massive and megaripple bedding and mudstone/siltstone showing evenly parallel lamination. FA3 refers to wadi/inundite deposits, generally organized as fining-upward cycles of metric size, composed of conglomerates and medium-grained pebbly sandstones showing massive bedding and cross-stratification, as well as claystone/siltstone showing evenly parallel to undulate lamination. Scour-and-fill features are isolated in predominantly tabular deposits composed of mudstones interbedded with fine to medium-grained sandstones showing planar to slightly undulate lamination. Silicified plant remains previously classified as belonging to the Psaronius genus found in the uppermost levels of the Pedra de Fogo Formation, near the

  4. Insectivory in Potamotrygon signata (Chondrichthyes: Potamotrygonidae, an endemic freshwater stingray from the Parnaíba River basin, northeastern Brazil

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    G. Moro

    Full Text Available Potamotrygon signata is an endemic freshwater stingray species in the Parnaíba River basin, Brazil. After its original description, only citations in systematic lists were recorded in the literature and the biology of the species remains unknown, including the feeding habits. The aim of this study is to characterize the overall diet of P. signata based on analysing stomach contents and to provide preliminary information on intraspecific diet variability between sexes and maturity stages. The stomach contents of 56 specimens of P. signata were analyzed. The taxonomic identification of food items showed the presence of 13 prey orders, including insects, mollusks, crustaceans and teleost fish. The Index of Relative Importance (IRI% indicated P. signata as an insectivorous species, with a dominance of Diptera larvae (60.64% and Ephemeroptera nymphs (34.68%. Differences in diet were observed between sexes, as well as between mature and immature individuals. The IRI% of females showed a similar occurrence of Diptera and Ephemeroptera (47.12% and 47.86%, respectively, whereas for males, Ephemeroptera was the main item (79.56%. Immature individuals showed a dominance of Diptera (76.20% while mature individuals showed a similar occurrence of Diptera (46.95% and Ephemeroptera (47.23%. The observed sexual and ontogenetic differences in diet may be related to distinct nutritional requirements of males and females, and to the variation of morphological aspects of the oral apparatus and dentition of males and females and of immature individuals and adults. The essentially insectivorous diet of the species is possibly adaptively advantageous in the Caatinga semi-arid environment, where the availability of fish as prey may be subject to strong seasonal variation.

  5. Insectivory in Potamotrygon signata (Chondrichthyes: Potamotrygonidae), an endemic freshwater stingray from the Parnaíba River basin, northeastern Brazil.

    Science.gov (United States)

    Moro, G; Charvet, P; Rosa, R S

    2012-11-01

    Potamotrygon signata is an endemic freshwater stingray species in the Parnaíba River basin, Brazil. After its original description, only citations in systematic lists were recorded in the literature and the biology of the species remains unknown, including the feeding habits. The aim of this study is to characterize the overall diet of P. signata based on analysing stomach contents and to provide preliminary information on intraspecific diet variability between sexes and maturity stages. The stomach contents of 56 specimens of P. signata were analyzed. The taxonomic identification of food items showed the presence of 13 prey orders, including insects, mollusks, crustaceans and teleost fish. The Index of Relative Importance (IRI%) indicated P. signata as an insectivorous species, with a dominance of Diptera larvae (60.64%) and Ephemeroptera nymphs (34.68%). Differences in diet were observed between sexes, as well as between mature and immature individuals. The IRI% of females showed a similar occurrence of Diptera and Ephemeroptera (47.12% and 47.86%, respectively), whereas for males, Ephemeroptera was the main item (79.56%). Immature individuals showed a dominance of Diptera (76.20%) while mature individuals showed a similar occurrence of Diptera (46.95%) and Ephemeroptera (47.23%). The observed sexual and ontogenetic differences in diet may be related to distinct nutritional requirements of males and females, and to the variation of morphological aspects of the oral apparatus and dentition of males and females and of immature individuals and adults. The essentially insectivorous diet of the species is possibly adaptively advantageous in the Caatinga semi-arid environment, where the availability of fish as prey may be subject to strong seasonal variation.

  6. Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil

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    Panuju Panuju

    2014-06-01

    Full Text Available DOI: 10.17014/ijog.v6i1.115The massive change in calcareous nannoplankton assemblages throughout Cretaceous/Tertiary (K/T boundary (65.5 M.a. has been illustrated by several authors. The diverse and abundant assemblage disappears suddenly above the Cretaceous/Tertiary boundary. This event is related to the most dramatic environmental changes in the Earth's history due to the catastrophic events, those are meteorite impact (Chicxulub and supervolcano eruption (Deccan occurring at the end of Cretaceous. The succeeding age was a time of rapid evolution of nannoplankton during Paleocene. A quantitative method analysis of nannoplankton throughout Maastrichtian to Paleocene of “P” well section, Santos Basin, Brazil, indicated that the nannoplankton assemblages abruptly decrease in diversity and abundance and mostly change in species composition. The various complex shapes of species at Maastrichtian also underwent changing to simple plain shapes and small at Paleocene. The sedimentary section ranges from the top of zone CC23 (Coccolith Cretaceous 23 to NP9 (Nannoplankton Paleogen 9. It is bounded by the Last Occurrence (LO of Tranolithus pachelosus at the base and Fasciculithus tympaniformis at the top. The biostratigraphic discontinuity characterized by the absence of zone CC26 to NP4 is an indicator for the presence of an unconformity at K/T boundary within analyzed section. The Cretaceous nannoplankton assemblages are dominated by Genera Watznaueria, Micula, Arkhangelskiella, Cribrosphaerella, Eiffellithus, Predicosphaera, and Retecapsa, whilst the Paleocene assemblages are dominated by Genera Toweius, Ericsonia, and Coccolithus. Survivor Cretaceous species recovered into Tertiary sediments consist of Braarudosphaera bigelowii, Biscutum melaniae, Neocrepidolithus neocrassus, Placozygus sigmoides, Cyclagelosaphaera reinhardtii, Markalius inversus, and Scapolithus fossilis.

  7. Biophysical indicators based on satellite images in an irrigated area at the São Francisco River Basin, Brazil

    Science.gov (United States)

    Leivas, Janice F.; Teixeira, Antônio Heriberto C.; Bayma-Silva, Gustavo; Ronquim, Carlos Cesar; Ribeiro da Silva Reis, João. Batista

    2016-10-01

    The Jaíba Irrigated Perimeter is a large irrigated agriculture area, located in the region Forest Jaíba between the São Francisco and Verde Grande rivers, in the Brazilian semi-arid region. In 2014, irrigators this the region face losses in the interruption of new plantings in irrigated areas due to water scarcity. The objective of this study is combine the model to estimate the Monteith BIO with the SAFER algorithm in the case of obtaining ET, to analyze the dynamics of natural vegetation and irrigated crops in water scarcity period. For application of the model are necessary data from meteorological stations and satellite images. Were used 23 satellite images of MODIS with spatial resolution of 250m and temporal 16 days, of 2014 year. For analyze the results, we used central pivots irrigation mask of Minas Gerais state, Brazil. In areas with irrigated agriculture with central pivot, the mean values of BIO over the year 2014 were 88.96 kg.ha-1.d-1. The highest values occurred between April 23 and May 8, with BIO 139 kg.ha-1.d-1. For areas with natural vegetation, the average BIO was 88.34 kg.ha-1.d-1 with lower values in September. Estimates of ET varied with the lowest values of ET observed in natural vegetation 1.91+/-1.22 mm.d-1 and the highest values in irrigated area is observed 3.51+/-0.97 mm.d-1. Results of this study can assist in monitoring of river basins, contributing to the management irrigated agriculture, with the trend of scarcity of water resources and increasing conflicts for the water use.

  8. A taxonomic synopsis of South American Cyanogomphini Carle with description of Cyanogomphus angelomachadoi sp. nov. from the Cerrado of Brazil (Odonata: Gomphidae).

    Science.gov (United States)

    Pinto, Ângelo Parise; Almeida, Marcus Vinícius Oliveira De

    2016-02-09

    A synopsis of Cyanogomphini Carle, 1986 (sensu Belle 1996), including all species currently under the genera Cyanogomphus Selys, 1873, and Tibiagomphus Belle, 1992, is provided. Cyanogomphus angelomachadoi sp. nov. (Holotype ♂ deposited in DZRJ: Brazil, Minas Gerais State, Jaboticatubas municipality, Parque Nacional da Serra do Cipó, collecting site "Córrego das Pedras" 19°22'17"S, 43°36'03"W, 766 m a.s.l., 12.XII.2011, A.P.M. Santos & D.M. Takiya leg.) is described and illustrated based on four males and two females from Minas Gerais and São Paulo States, southeastern Brazil. The new species is most similar to C. waltheri Selys, 1873, from which it can be distinguished by its smaller size; larger pale areas on mesepisternum; pale dorsal surface of metathoracic tibia; larger distal concavity on epiproct, with laterodistal projection, in lateral view forefinger-shaped; and occurrence in Cerrado province. Five species are recognized in Cyanogomphini, and for each one a synonymy, diagnoses, identification key and maps of distribution are presented. The status of sibling taxa Tibiagomphus uncatus (Fraser, 1947) and T. noval (Rodrigues Capítulo, 1985), as well as the Agriogomphus-complex of genera are also discussed.

  9. Acid rain: a case study at the Universidade de Sao Paulo campus, Sao Paulo State, Brazil; Chuva acida: estudo de caso no campus USP/SP

    Energy Technology Data Exchange (ETDEWEB)

    Galvao, Patricia

    1996-12-31

    The phenomena called acid rain is considered, by many researchers, one of the most serious environmental problem. This work has the aim of showing, in a theoretical and practical study, the problems caused by the atmospheric-pollutant emission, through natural or anthropogenic sources. In a period of 1 year (nov/94-nov/95), it was realized a practical work on rainwater, which consisted of collecting and, afterwards, analysing some physical and chemical parameters of this water, such as acidity, ionic concentrations, etc, with the purpose of characterizing the rainwater in Cidade Universitaria (SP, Brazil). After ending the practical part, it was possible to observe a 1,236.71 mm/y pluviosity, characterized by rainy summer and dry winter. The chemical-constituent-concentration analysis show us the predominance of SO{sup 2-}{sub 4} and Ca{sup 2+}, and a continental-origin water). The region of sao Paulo (Brazil), site of this study, is one of the largest metropolitan and industrialized areas of the world, which includes 18 million people, beside to an enormous industrial and vehicular complex. The acidity in the rain water is a complex problem and it must be treated by a range of disciplines to have a better comprehension of the cause/effects of the acid rain. (author) 96 refs., 28 figs., 4 tabs.

  10. Late Paleozoic paleofjord in the southernmost Parana Basin (Brazil): Geomorphology and sedimentary fill

    Science.gov (United States)

    Tedesco, Julia; Cagliari, Joice; Coitinho, Julia dos Reis; da Cunha Lopes, Ricardo; Lavina, Ernesto Luiz Correa

    2016-09-01

    In the southernmost part of the Parana Basin, records of the late Paleozoic glaciation occur in a discontinuous form preserved in paleovalley systems excavated in the crystalline basement. This paper addresses one of these paleovalleys, the Mariana Pimentel, which extends over 60 km with NW-SE valley direction and a constant width of 2.5 km. With the objective of demonstrating that the paleovalley worked as a fjord during the glaciation period, its origin as well as sedimentary fill and morphology were analyzed. The paleovalley morphology was obtained through electrical resistivity (electrical sounding and lateral mapping) and mathematical modeling in four transverse sections. The morphology of the paleovalley documented by the U-shape, steady width, and high depth reaching up to 400 m are typical features of modern glacial valleys. The sedimentary facies that fill the base of the paleovalley, such as rhythmites and dropstones with thickness up to 70 m and diamictites with faceted pebbles (up to 5 m thick) are signs of its glacial origin. During the glaciation period, the paleovalley had a connection to the epicontinental sea located to the northwest, extended toward Namibia, and was excavated by glaciers from the highlands of this region. Thus, the evidence attests that the Mariana Pimentel paleovalley was a fjord during the late Paleozoic glaciation. The duration of the late Paleozoic glaciation (which is longer than the Quaternary glaciation), the apatite fission track that suggests erosion up to 4 km thick in the study area, and the lack of preserved hanging valleys in the Mariana Pimentel indicate that the paleovalley once featured a higher dimension. Furthermore, the existence of paleofjords excavated in the border of the basement corroborates the idea of small ice centers controlled by topography during the late Paleozoic glaciation.

  11. Spatial variability of soil carbon stock in the Urucu river basin, Central Amazon-Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Ceddia, Marcos Bacis, E-mail: marcosceddia@gmail.com [Department of Soil, Institute of Agronomy, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropédica, RJ 23890-000 (Brazil); Villela, André Luis Oliveira [Colégio Técnico da UFRRJ, RJ, Seropédica 23890-000 (Brazil); Pinheiro, Érika Flávia Machado [Department of Soil, Institute of Agronomy, Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropédica, RJ 23890-000 (Brazil); Wendroth, Ole [Department of Plant & Soil Sciences, University of Kentucky, College of Agriculture, Lexington, KY (United States)

    2015-09-01

    The Amazon Forest plays a major role in C sequestration and release. However, few regional estimates of soil organic carbon (SOC) stock in this ecoregion exist. One of the barriers to improve SOC estimates is the lack of recent soil data at high spatial resolution, which hampers the application of new methods for mapping SOC stock. The aims of this work were: (i) to quantify SOC stock under undisturbed vegetation for the 0–30 and the 0–100 cm under Amazon Forest; (ii) to correlate the SOC stock with soil mapping units and relief attributes and (iii) to evaluate three geostatistical techniques to generate maps of SOC stock (ordinary, isotopic and heterotopic cokriging). The study site is located in the Central region of Amazon State, Brazil. The soil survey covered the study site that has an area of 80 km{sup 2} and resulted in a 1:10,000 soil map. It consisted of 315 field observations (96 complete soil profiles and 219 boreholes). SOC stock was calculated by summing C stocks by horizon, determined as a product of BD, SOC and the horizon thickness. For each one of the 315 soil observations, relief attributes were derived from a topographic map to understand SOC dynamics. The SOC stocks across 30 and 100 cm soil depth were 3.28 and 7.32 kg C m{sup −2}, respectively, which is, 34 and 16%, lower than other studies. The SOC stock is higher in soils developed in relief forms exhibiting well-drained soils, which are covered by Upland Dense Tropical Rainforest. Only SOC stock in the upper 100 cm exhibited spatial dependence allowing the generation of spatial variability maps based on spatial (co)-regionalization. The CTI was inversely correlated with SOC stock and was the only auxiliary variable feasible to be used in cokriging interpolation. The heterotopic cokriging presented the best performance for mapping SOC stock. - Highlights: • The SOC stocks across 30 and 100 cm depth were 3.28 and 7.32 kg C m{sup −2}, respectively. • SOC stocks were 34 and 16

  12. Riggia cryptocularis sp. nov. (Isopoda, Cymothoidae from the body cavity of a freshwater fish of Mato Grosso do Sul State, Brazil

    Directory of Open Access Journals (Sweden)

    Thatcher Vernon E.

    2003-01-01

    Full Text Available Riggia cryptocularis sp. nov. (Isopoda, Cymothoidae is described on the basis of one female and one male specimen from the body cavity of freshwater fish from Mato Grosso do Sul State, Brazil. The new species is similar in size to R. paranensis Szidat, 1948, but differs from that species in the following respects. The body shapes are different since the widest part of the adult female is more anterior in R. paranensis. The eyes of the new species are covered and non-functional unlike those of the other species. The cephalon of the new species has a postero-dorsal elevation and a rounded and depressed frons which are lacking in the other species. Pereonites 5-7 are subequal in length in the new species and decrease in length in R. paranensis. The pleon/pleotelson tapers in the female of the new species and in the other it is bluntly rounded and with nearly parallel sides. The pleopods of R. cryptocularis sp. nov. also taper while those of R. paranensis are rounded. The recently described species, R. acuticaudata Thatcher, Lopes & Froehlich, 2002, was also obtained in Mato Grosso do Sul State but differs greatly from the presently described species. The body of R. acuticaudata is much smaller, and more rounded. The eyes of this species are large and functional, the dorsum of the cephalon lacks a dorsal prominence and the pleon/pleotelson tapers more abruptly.

  13. A new species of Moenkhausia Eigenmann (Characiformes: Characidae from the rio Xingu basin, Brazil

    Directory of Open Access Journals (Sweden)

    Manoela M. F. Marinho

    2010-01-01

    Full Text Available A new species of Moenkhausia from the upper rio Xingu basin is described. Moenkhausia eurystaenia is distinguished from all congeners, except M. heikoi and M. phaeonota, by the presence of a dark, broad longitudinal stripe from the opercle to the end of caudal peduncle. The new species is distinguished from M. heikoi mainly by having 18-21 branched anal-fin rays (vs. 24-26 and the absence of a round blotch at the end of the caudal peduncle (vs. present. Moenkhausia eurystaenia can be distinguished from M. phaeonota mainly by the anterior portion of longitudinal band darker at horizontal septum (vs. darker below horizontal septum, the deep dark pigmentation along horizontal septum extending anteriorly up to humeral region (vs. extending up to vertical through pelvic-fin origin, number of vertebrae 34 (vs. 36-37, and others additional measurements.Uma espécie nova de Moenkhausia da bacia do alto rio Xingu é descrita. Moenkhausia eurystaenia distingue-se de todas as congêneres, exceto M. heikoi e M. phaeonota, pela presença de uma faixa longitudinal larga e escura que se estende do opérculo ao pedúnculo caudal. A espécie nova distingue-se de Moenkhausia heikoi principalmente por apresentar 18-21 raios ramificados na nadadeira anal (vs. 24-26, e ausência de uma mácula circular no final do pedúnculo caudal (vs. presença. Moenkhausia eurystaenia distingue-se de M. phaeonota principalmente pela porção anterior da faixa longitudinal ser mais escura no septo horizontal (vs. mais escura abaixo do septo horizontal, pigmentação profunda e escura ao longo do septo horizontal se estendendo até a região umeral (vs. se estendendo até a vertical que passa pela origem da nadadeira pélvica, 34 vértebras (vs. 36-37, e outras medidas adicionais.

  14. Maize (Zea Mays L landraces from the southern region of Brazil: contamination by Fusarium sp, zearalenone, physical and mechanical characteristics of the kernels

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    Tatiana Roselena de Oliveira

    2009-11-01

    Full Text Available This work had as objectives the study of the physical and mechanical characteristics of maize kernels in relation to the contamination by Fusarium sp and by zearalenone in twenty landraces of maize from the southern region of Brazil. From the analyzed samples, 60 % has been considered to have a hard endosperm type and 40 % an intermediary one. A correlation between the physical and mechanical variables was observed as an indication that the higher is the proportion of hard endosperm, more dense will be the kernel and more force for its rupture will be necessary. The level of contamination by Fusarium sp was between 5.5 and 24.75% among the analyzed grains, correlating positively with the flotation index, indicating that the landraces of maize with a softer endosperm can present a higher contamination by this genus. The presence of zearalenone was verified in 75 % of the samples, in concentrations varying from 50 to 640 µg kg-1.Este trabalho teve por objetivos verificar as características físicas, mecânicas, contaminação por Fusarium sp e por zearalenona e suas relações, em vinte variedades crioulas de milho da região sul do Brasil. Verificou-se que das amostras analisadas, 60% foram consideradas como possuidoras de endosperma do tipo duro e 40% com endosperma do tipo intermediário. As variáveis físicas e mecânicas se correlacionaram, indicando que quanto maior a proporção de endosperma vítreo, mais denso e maior a força necessária até a ruptura do grão. A contaminação por Fusarium sp esteve entre 5,5% e 24,75% nos grãos analisados, correlacionando-se positivamente com o índice de flotação, indicando que as variedades crioulas de milho com uma maior proporção de endosperma macio podem apresentar uma maior contaminação por Fusarium sp, sugerindo-se a utilização de variedades crioulas com a textura do endosperma predominantemente vítrea. A presença de zearalenona foi verificada em 75% das amostras, em concentra

  15. Microhabitat selection and co-occurrence of Pachistopelma rufonigrum Pocock (Araneae, Theraphosidae and Nothroctenus fuxico sp. nov. (Araneae, Ctenidae in tank bromeliads from Serra de Itabaiana, Sergipe, Brazil

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    Sidclay Calaça Dias

    2004-12-01

    Full Text Available Microhabitat selection and co-occurrence of Pachistopelma rufonigrum Pocock (Theraphosidae and Nothroctenus fuxico sp. nov. (Ctenidae, in tank bromeliads were investigated. Thermal conditions, inside and outside the plants, were measured in order to verify if the temperature of the water that accumulates inside the plant affects the behavior of these species. Measurements of foliar parameters were taken in order to evaluate if and how plant structure affects spider abundance and microhabitat selection. Apparently, differences in plant structure do not affect either spider abundance or microhabitat selection. No microhabitat preference was observed and co-ocurrence of both species was a random event. In addition, notes on the distribution range of P. rufonigrum and the description of N. fuxico sp. nov. from State of Sergipe, Brazil are presented.Foram estudadas a seleção de microhabitat e co-ocorrência de Pachistopelma rufonigrum Pocock (Theraphosidae e Nothroctenus fuxico sp. nov. (Ctenidae em bromélias-tanque. A condição da temperatura dentro e fora das plantas foi medida para verificar se a temperatura da água acumulada dentro da bromélia afeta algum aspecto comportamental das aranhas que ali vivem. Medidas dos parâmetros foliares foram realizadas para avaliar se a estrutura das plantas chega a afetar a abundância ou a seleção de microhabitat dessas aranhas. Aparentemente, as diferenças na estrutura das duas espécies de bromélias estudadas não afetam nem a abundância, nem a seleção de microhabitat de P. rufonigrum e N. fuxico sp. nov. A preferência e co-ocorrência de ambas as espécies de aranhas parece ser um evento ao acaso. Adicionalmente, apresenta-se notas sobre os limites de distribuição de P. rufonigrum e descreve-se N. fuxico sp. nov. do Estado de Sergipe, Brasil.

  16. A new long-finned Corydoras Lacépède, 1803 (Siluriformes: Callichthyidae from the lower rio Paraná basin, Brazil

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    Luiz F. C. Tencatt

    Full Text Available A new species of Corydoras is described from the lower rio Paraná basin, just downstream from Itaipu Dam, Brazil, close to Paraguay boundary. The new species can be distinguished from most of its congeners by the infraorbital 2 with a posterior laminar expansion conspicuously reduced, first and second dorsal-fin branched rays conspicuously elongated in males, mesethmoid entirely covered by skin, and by the presence of four to six irregular black or brownish blotches on the midline of the flank. The probable occurrence of the new species in the floodplain of the upper portion of the rio Paraná drainage is discussed.

  17. Description and relationships of Otothyropsis marapoama, a new genus and species of hypoptopomatine catfish (Siluriformes: Loricariidae from rio Tietê basin, southeastern Brazil

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    Alexandre C. Ribeiro

    Full Text Available Otothyropsis marapoama, a new genus and species, is described based on specimens recently collected in a headwater stream of the middle stretch of the rio Tietê, a river from the upper rio Paraná basin in southeastern Brazil. The new taxon belongs to a clade also encompassing the genera Schizolecis, Otothyris and Pseudotothyris. Otothyropsis marapoama is hypothesized to be the sister-group of Pseudotothyris and Otothyris based mainly on the presence of several derived characters of the swimbladder capsule and associated bones. Several paedomorphic characters shared by Pseudotothyris and Otothyris and their significance for the phylogenetic position of the new genus are discussed.

  18. A new species of Microglanis(Siluriformes: Pseudopimelodidae from the upper rio Tocantins basin, Goiás State, Central Brazil

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    Oscar Akio Shibatta

    Full Text Available A new species of Microglanis is described from the upper rio Tocantins basin, Barro Alto, Goiás State, Brazil. This species is distinguished from the others by presenting a unique color pattern, consisting of round spots in the flank between the larger dark brown blotches. Moreover, it can be distinguished by the combination of the following features: caudal fin emarginate, the upper lobe slightly larger than the lower, lateral line relatively long, reaching vertical through posterior margin of the pelvic fin, and light stripe on supra-occipital region absent or very narrow and with irregular shape.

  19. Biological aspects of Schizodon nasutus Kner, 1858 (Characiformes, Anostomidae in the low Sorocaba river basin, São Paulo state, Brazil

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    GA. Villares Junior

    Full Text Available Four biological aspects of Schizodon nasutus in the low Sorocaba river basin, São Paulo, Brazil were analysed. These were accomplished during the year seasons. The fish diet and the feeding activity were investigated by studying the repletion index, which showed no significant differences between seasons. The food items analysed by frequency of occurrence and dominance showed a predominance of vegetable items in the diet. The reproduction, analysed by using the gonadosomatic index, indicated that the reproductive period occurs during the summer period when temperatures are higher and rainfalls are more intense. The amount of accumulated fat and condition factor varied according to reproduction, especially for females.

  20. On Machadosentis travassosi n. g., n. sp. (Eoacanthocephala: Quadrigyridae parasite of a moray Gymnothorax ocellatus in Brazil

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    Dely Noronha

    1992-01-01

    Full Text Available Machadosentis travassosi n. g., n. sp. an acanthocephalan parasite of a moray are proposed after comparison with the related genera in Quadrigyridae VVan Cleave, 1920. The new genus differs from the other related by the arrangement of proboscis hooks (five circles of rows with five hooks each, with well developed roots besides the distribution of cuticular spines.

  1. Environmental analyses of the parasitic profile found in the sandy soil from the Santos municipality beaches, SP, Brazil

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    Silvana Rocha

    2011-10-01

    Full Text Available The environmental contamination by geohelminths represents a world public health problem and has been well documented by several authors. However, few papers describe the presence of such contamination in saline soils of coastal beaches. A study was performed on the beaches of the municipality of Santos in the period between May 2004 to April 2005 with the aim of determining the degree of contamination, and the correlation between contamination level and seasonal conditions and characteristics of the environment. Of the 2,520 samples analyzed, 18.2% (458 were contaminated, 32.3% (148 of which were localized in children's recreational areas (playgrounds. The parasite profile found in the analyzed samples indicated the presence of several zoonotic parasites: Ancylostoma larvae (82.5%, Toxocara sp. eggs (59.4%, Ancylostomidae-like eggs (37.1%, coccid oocysts (13.5%, Trichostrongylus sp. eggs and larvae, Ascaris lumbricoides eggs, (11.6%, Entamoeba sp. cysts (10.0%, Strongyloides sp. (4.8%, several free nematoids and some non-identified parasitic structures (3.3%. It was established that the highest frequency of parasitic structures occurred in the months between May and October 2004, and from February to March 2005. An increase in the diversity of parasitic forms was documented in the months between February to December 2004 and from January to April 2005, these periods having the highest rainfall.

  2. Two new species of Hypostomus Lacépède (Teleostei: Loricariidae from the upper rio Paraná basin, Central Brazil

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    Cláudio H. Zawadzki

    Full Text Available Two new species of Hypostomus Lacépède (Teleostei: Loricariidae from the rio Paranaíba and rio Grande basins, both in the upper rio Paraná basin, central Brazil, are described herein. One of them is distinguished from all congeners, except H. albopunctatus, by having the pectoral-fin spine length equal to or smaller than the pelvic-fin spine. From H. albopunctatus, it is distinguished by having round dark spots (vs. pale on body and fins. The second species is distinguished from all congeners, except H. multidens and H. ternetzi, by having more than 115 teeth (vs. less than 109 per ramus on dentary and premaxilla. It is distinguished most readily from H. ternetzi by having teeth with two symmetrical (vs. asymmetrical cusps. It is distinguished from H. multidens by having round dark spots (vs. pale over body and fins.

  3. Parotocinclus halbothi, a new species of small armored catfish (Loricariidae: Hypoptopomatinae, from the Trombetas and Marowijne River basins, in Brazil and Suriname

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    A. Pablo Lehmann

    Full Text Available Parotocinclus halbothiis described as a new species from the Trombetas and Marowijne river basins, in Brazil and Suriname. The new species is distinguished from its congeners in the Guianas, Orinoco, and Amazon basins by details of color pattern, form and arrangement of bony plates, body shape, and morphometric features. It is distinguished from all other species of Parotocinclusby the elongation of the canal cheek plate on the ventral surface of head posteriorly to contact the cleithrum. The new species is differentiated from Parotocinclus collinsae, the most similar species in terms of color pattern, by the small, circular, median abdominal plates, the poorly developed preanal shield with two or three plates, and by having the adipose fin rudimentary. This new species is one of the smallest loricariid catfishes known to date.

  4. Resurrection of Pareiorhaphis Miranda Ribeiro, 1918 (Teleostei: Siluriformes: Loricariidae, and description of a new species from the rio Iguaçu basin, Brazil

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    Edson H. Lopes Pereira

    Full Text Available A new species of the loricariid subfamily Neoplecostominae is described on the basis of specimens obtained from the headwaters of the rio Iguaçu basin in the State of Paraná, southern Brazil. Pareiorhaphis parmula is the first representative of the genus discovered from the rio Paraná basin and expands the geographic distribution of the genus. It is diagnosed from other Pareiorhaphis species by having one small plate on each side of the pectoral girdle, just posterior to the gill opening and the club-shaped pectoral-fin spine, broadening from base to tip in adult males. All species formerly included in Hemipsilichthys except H. gobio, H. papillatus, and H. nimius are transferred to the genus Pareiorhaphis, which is resurrected from the synonymy of Hemipsilichthys.

  5. Spongia (Heterofibria catarinensis sp. nov. (Porifera, Spongiidae no litoral de Santa Catarina, Brasil Spongia (Heterofibria catarinensis sp. nov. (Porifera, Spongiidae at the coastline of Santa Catarina, Brazil

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    Beatriz Mothes

    Full Text Available Uma nova espécie, Spongia (Heterofibria catarinensis, é descrita para a Ilha das Aranhas (27º29'077''S, 48º21'380''W, Estado de Santa Catarina, Brasil. Difere das outras espécies do gênero do Atlântico sudoeste pela morfologia externa e arquitetura. A nova espécie é caracterizada por apresentar forma massiva, incrustante com projeções lobulares; fibras primárias medindo 60-100 µm; fibras secundárias 11,5-69 µm; fibras pseudoterciárias 2,3-23 µm e distância entre fibras primárias 391-920 µm; distância entre fibras secundárias/pseudoterciárias 92-575 µm; fibras secundárias/pseudoterciárias constituindo malhas poligonais com 30-700 µm de diâmetro. A espécie pertence ao subgênero Heterofibria Cook & Bergquist, 2001 por apresentar uma clara dicotomia de suas fibras.A new species, Spongia (Heterofibria catarinensis, is described from Ilha das Aranhas (27º29'077''S, 48º21'380''W, State of Santa Catarina, Brazil. It differs from the other southwestern Atlantic species of this genus by external morphology and architecture. The new species is characterized for presenting massive form, incrusting with lobate projections; primary fibres measuring 60-100 µm; secondary fibres 11,5-69 µm; pseudotertiary fibres 2,3-23 µm and distance between primary fibres 391-920 µm; distance between secondary/pseudotertiary fibres 92-575 µm; secondary/pseudotertiary fibres constituting polygonal meshes 30-700 µm diameter. This species belongs to subgenus Heterofibria Cook & Bergquist, 2001 for displaying a clear dichotomy of its fibres.

  6. Composition and structure of fish assemblage from Passa Cinco stream, Corumbataí river sub-basin, SP, Brazil

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    AL Carmassi

    Full Text Available The aim of this work was to determine the composition of the fish assemblage of Passa Cinco stream and verify changes in their structure on the altitudinal gradient. Six samples were performed at five different sites in Passa Cinco stream (from the headwater, at order two, to its mouth, at order six, using an electric fishery equipment and gill nets in May, July, September and November of 2005 and January and March of 2006. The indices of Shannon's diversity, Pielou's evenness and Margalef's richness were quantified separately considering the different fishery equipment (nets versus electric fishery equipment. An ANOVA was used to compare samples collected in relation to values of abundance, diversity, evenness and richness. The representativeness of the species was summarised by their average values of abundance and weight. We captured 5082 individuals distributed into 61 species. We observed a trend of increasing diversity, richness and evenness of species from site 1 to 3, with further decrease in sites 4 and 5. The values found for habitat diversity also followed this pattern. Significant differences were found for all three indices considering the electric fishery samples. For individuals caught with nets, only the richness index showed a significant difference. Characidium aff. zebra was an important species in the headwater and transition sites and Hypostomus strigaticeps in middle-lower course sites. Despite the small extension of the Passa Cinco stream, environments structurally well defined were evidenced by the species distribution and assemblage composition along the gradient.

  7. Penicillium excelsum sp. nov from the Brazil Nut Tree Ecosystem in the Amazon Basin'

    DEFF Research Database (Denmark)

    Taniwaki, Marta Hiromi; Pitt, John I; Iamanaka, Beatriz T.;

    2015-01-01

    as bees and ants from the tree ecosystem in the Amazon rainforest. The species produces andrastin A, curvulic acid, penicillic acid and xanthoepocin, and has unique partial β-tubulin and calmodulin gene sequences. The holotype of P. excelsum is CCT 7772, while ITAL 7572 and IBT 31516 are cultures derived...

  8. Sensoriamento remoto e geoprocessamento aplicados ao uso da terra em microbacias hidrográficas, Botucatu - SP Remote sensing and gis applied to study the land use in watersheds in Botucatu, Brazil

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    Sérgio Campos

    2004-08-01

    Full Text Available O presente trabalho teve como objetivo identificar e quantificar o uso da terra em dez microbacias ocorrentes na bacia do Rio Capivara, município de Botucatu - SP, a partir da estruturação de um banco de dados utilizando o Sistema de Informações Geográficas (SIG - IDRISI. Os resultados mostram que as classes de uso da terra, "uso agrícola" e "pastagem", foram as mais significativas, pois ocuparam mais da metade da área das microbacias. O alto índice de uso da terra por pastagens, capoeiras, reflorestamento e matas reflete a predominância de solos arenosos com baixa fertilidade. As imagens obtidas do satélite LANDSAT 5 permitiram o mapeamento do uso da terra de maneira rápida, além de fornecer um excelente banco de dados para futuro planejamento e gerenciamento das atividades agropecuárias regionais. O SIG-IDRISI permitiu identificar, por meio de seus diferentes módulos para georreferenciamento, classificação digital e modelo matemático, as classes de uso da terra com rapidez.This study aimed to identify and quantify the land use in ten watersheds in the Capivara river-basin, in the municipality of Botucatu - SP, Brazil. A database was made using the Geographical Information System - IDRISI. The results showed that the classes of agriculture and pasture were the most significant land use, as they occupied more than half of the area of the watersheds. The high index of land use by pasture, brushwood, reforestation and forests, reflected the predominance of sandy soils with low fertility. The images of the satellite LANDSAT-5 allowed the mapping of the land use in a fast and reliable way. In addition they supplied an excellent database for future planning and management of the regional agricultural activities. GIS - IDRISI allowed the identification, digital classification and mathematical modeling of several areas of land use.

  9. Presence of the walking catfish Clarias gariepinus (Burchell (Siluriformes, Clariidae in Minas Gerais state hydrographie basins, Brazil

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    Carlos Bernardo Mascarenhas Alves

    1999-03-01

    Full Text Available The first official occurrence of the exotic species Clarias gariepinus (Burchell, 1822 in the Rio Paraopeba (São Francisco river basin, the Rio Grande (Paraná river basin, and the Rio Doce (Doce river basin, is reported, with comments on the possible ecological consequences and on the conservation of freshwater fish biodiversity due to non-native species introductions.

  10. Presence of the walking catfish Clarias gariepinus (Burchell) (Siluriformes, Clariidae) in Minas Gerais state hydrographie basins, Brazil

    OpenAIRE

    Carlos Bernardo Mascarenhas Alves; Volney Vono; Fábio Vieira

    1999-01-01

    The first official occurrence of the exotic species Clarias gariepinus (Burchell, 1822) in the Rio Paraopeba (São Francisco river basin), the Rio Grande (Paraná river basin), and the Rio Doce (Doce river basin), is reported, with comments on the possible ecological consequences and on the conservation of freshwater fish biodiversity due to non-native species introductions.

  11. Tectonism and sedimentation in the southwestern portion of the Potiguar Rift - onshore Potiguar Basin, Brazil; Tectonismo e sedimentacao na porcao SW do Rifte Potiguar - Bacia Potiguar emersa

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Ubiraci Manoel [PETROBRAS S.A., Rio Grande do Norte e Ceara, Natal, RN (Brazil). Unidade de Negocio de Exploracao e Producao], E-mail: ubiraci@petrobras.com.br; Rossetti, Enio Luiz

    2005-05-15

    Through an integrated approach, using lithostratigraphic, chronostratigraphic and biostratigraphic data the relative importance of climatic variations and tectonics has been recognized in rift sediments of the onshore Potiguar Basin, Northeast Brazil. Sequence stratigraphy concepts have been applied as a template to integrate sedimentological, geochemical (oxygen isotopes) and biostratigraphic (quantitative palynology) data, as well as back stripping and sedimentary basin modeling techniques to address and recognize the main depositional patterns produced in a rift basin. The main objective is to distinguish the effects of climatic changes and tectonics to the resulting stratigraphic architecture. The studied section includes a Late Valanginian- Early Barremian (Lower Cretaceous) rift interval from the Pendencia Formation, located in the southwestern portion of Umbuzeiro Graben in the onshore Potiguar Basin. The depositional setting is interpreted as a progradational fluvial-deltaic system entering a lake through its flexural margin. Seismic stratigraphic and well logs analysis provided an interpretation of two regressive intervals (Green and Yellow sequences), separated by a broad transgressive interval (Orange Sequence), known as the Livramento Shale. The depositional history encompasses three stages: two tectonically active phases, during the deposition of the Green and Yellow sequences, and a tectonically quiescent phase, during the deposition of the Orange Sequence. Paleoclimatic interpretation, based on quantitative palynology and geochemical data ({delta}{sup 18}O), suggests a tendency to arid conditions during the tectonically active phases and wet conditions during the tectonically quiescent phase (author)

  12. Geophysical evidence of pre-sag rifting and post-rifting fault reactivation in the Parnaíba basin, Brazil

    Science.gov (United States)

    Lopes de Castro, David; Hilário Bezerra, Francisco; Adolfo Fuck, Reinhardt; Vidotti, Roberta Mary

    2016-04-01

    This study investigated the rifting mechanism that preceded the prolonged subsidence of the Paleozoic Parnaíba basin in Brazil and shed light on the tectonic evolution of this large cratonic basin in the South American platform. From the analysis of aeromagnetic, aerogravity, seismic reflection and borehole data, we concluded the following: (1) large pseudo-gravity and gravity lows mimic graben structures but are associated with linear supracrustal strips in the basement. (2) Seismic data indicate that 120-200 km wide and up to 300 km long rift zones occur in other parts of the basins. These rift zones mark the early stage of the 3.5 km thick sag basin. (3) The rifting phase occurred in the early Paleozoic and had a subsidence rate of 47 m Myr-1. (4) This rifting phase was followed by a long period of sag basin subsidence at a rate of 9.5 m Myr-1 between the Silurian and the late Cretaceous, during which rift faults propagated and influenced deposition. These data interpretations support the following succession of events: (1) after the Brasiliano orogeny (740-580 Ma), brittle reactivation of ductile basement shear zones led to normal and dextral oblique-slip faulting concentrated along the Transbrasiliano Lineament, a continental-scale shear zone that marks the boundary between basement crustal blocks. (2) The post-orogenic tectonic brittle reactivation of the ductile basement shear zones led to normal faulting associated with dextral oblique-slip crustal extension. In the west, pure-shear extension induced the formation of rift zones that crosscut metamorphic foliations and shear zones within the Parnaíba block. (3) The rift faults experienced multiple reactivation phases. (4) Similar processes may have occurred in coeval basins in the Laurentia and Central African blocks of Gondwana.

  13. AUTODEPURATION CAPACITY OF A STRETCH OF THE CORUMBATAÍ RIVER, SP, BRAZIL = CAPACIDADE DE AUTODEPURAÇÃO DE UM TRECHO DO RIO CORUMBATAÍ, SP, BRASIL

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    Antonio Carlos Simões Pião

    2007-01-01

    Full Text Available The depuration rate of the low stretch of the Corumbataí River, SP, was evaluated by using the K2 index, considering the importance of the quality and quantity of the water as a vital source of drinking water. Water samples were taken in the humid/hot and dry/cold seasons in the Corumbataí River and two tributaries, the Passa-Cinco River and the Ribeirão Água Vermelha, measuring the speed of the water, discharge, depth, dissolved oxygen (OD, biochemical oxygen demand (BOD, chemical oxygen demand (COD and total nitrogen (TN. The watercourse of the Corumbataí River receives large amounts of organic loads proceeding from diffuse sewage from domestic and agro-industrial effluents, discharged without previous treatment, causing a high degree of degradation of its water quality. The lower stretch of the Corumbataí still has a high depuration rate, mainly in the dry/cold period, reaching approximately 70.3%. This autodepuration capacity is probably due to the accented declivity in the stretch studied, to its meandering course and base rock formation, and to the presence of riparian forest. In this sense, this study can contribute information to decision making at the municipal and communitty levels in the “Comitê das Bacias Hidrográficas PCJ”, as this watershed is an important drinking water source. = O Índice de Depuração do baixo curso do Rio Corumbataí, SP, foi avaliado considerando a importância da água, quanto à qualidade e quantidade para abastecimento público através do índice K2. Sazonalmente nos períodos úmido/quente e seco/frio foram realizadas coletas em dois afluentes do Rio Corumbataí, o Rio Passa-Cinco e o Ribeirão Água Vermelha. As coletas foram realizadas no canal dos afluentes e após a foz de cada um deles junto ao rio Corumbataí, medindo-se a velocidade da água, vazão, profundidade, oxigênio dissolvido (OD, demanda bioquímica de oxigênio (DBO, demanda química do oxigênio (DQO e nitrogênio total (NT

  14. Pseudascarophis brasiliensis sp. nov. (Nematoda: Cystidicolidae parasitic in the Bermuda chub Kyphosus sectatrix (Perciformes: Kyphosidae from southeastern Brazil

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    Felipe Bisaggio Pereira

    2013-06-01

    Full Text Available A new species of Pseudascarophis (Nematoda: Cystidicolidae found in the stomach of Kyphosus sectatrix (Linnaeus (Kyphosidae, off Rio de Janeiro, Brazil, is described. The new species can be differentiated from the other congeners by the presence of lateral alae, distinct but inconspicuous cephalic papillae at the anterior end, three pairs of precloacal and one pair of adcloacal papillae in males, egg morphology and morphometry of glandular oesophagus and spicules. Pseudascarophis tropica is transferred to Ascarophis as Ascarophis tropica (Solov'eva comb. n. due to its ambiguous diagnosis.

  15. Valores hematológicos de capivaras (Hydrochoerus Hydrochaeris criadas em cativeiro no município de Botucatu, SP Hematological values of captive capybara (Hydrochoerus Hydrochaeris in Botucatu county, São paulo, SP, Brazil

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    Maid Eliane Arouca

    2000-10-01

    Full Text Available Utilizaram-se onze capivaras (Hydrochoerus hydrochaeris, cinco machos e seis fêmeas, sadias, com dois anos de idade, criadas em regime de cativeiro na Fazenda Experimental Lageado da FMVZ - UNESP de Botucatu - SP, submetidas à anestesia dissociativa com midazolam e quetamina, para o estabelecimento de valores hematológicos. Este estudo compreendeu a determinação dos valores normais de eritrograma, leucograma, proteína plasmática total e fibrinogênio.Os valores médios encontrados para machos e fêmeas foram, respectivamente, 3,62 e 3,71x10(6/mil para eritrócitos, 15,0 e 15,4g/dl para hemoglobina, 48 e 49% para volume globular, 4630 e 5200/mil para leucócitos, 6,3 e 6,4g/dl para proteína plasmática total e 240 e 316,6mg/dl para fibrinogênio. Observou-se, desse modo, a ausência de diferenças entre os sexos.Eleven healthy capybara (Hydrochoerus hydrochaeris from the Experimental Farm Lageado - FMVZ - UNESP - Botucatu, SP - Brazil, were used in order to determine the hematological values, under Midazolan and Ketamine anesthesia. This study included the determination of normal eritrogram, leucogram, total plasmatic protein and fibrinogen values. The mean values for males and females were red cell 3.62 and 3.71x10(6/mul, hemoglobin 15.0 and 15.4g/dl, PCV 48 and 49%, white cell 4630 and 5200/mul, total plasmatic protein 6.3 and 6.4mg/dl and fibrinogen 240 and 316.6mg/dl, respectively. Diference among sex was not found.

  16. Cymothoa recifea sp. nov. (Isopoda, Cymothoidae from the mouths of marine fishes of Pernambuco State, Brazil Cymothoa recifea sp. nov. (Isopoda, Cymothoidae das bocas de peixes marinhos do Estado de Pernambuco, Brasil

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    Vernon E. Thatcher

    2005-09-01

    Full Text Available Cymothoa recifea sp. nov. (Isopoda, Cymothoidae is described from the mouths of Centropomus undecimalis (Bloch, 1792 and Oligoplites palometa (Cuvier, 1832. The fish hosts were caught near Itamaracá and Cabo de Santo Agostinho, State of Pernambuco, Brazil. The new species bears a superficial resemblance to Cymothoa oestrum (Linnaeus, 1793 from which it differs in a number of important respects. In the new species, the basal carinae are large on pereopods 4-7 and usually pointed, whereas in C. oestrum the carinae are small on pereopods 4-6, large on 7 and not pointed. In the new species, only pleopod 1 is simple and 2-5 are provided with pockets and folds. In the other species, pleopods 1-4 are simple and only 5 has folds.Cymothoa recifea sp. nov. (Isopoda, Cymothoidae é descrito das bocas de Centropomus undecimalis (Bloch, 1792 e Oligoplites palometa (Cuvier, 1832. Os peixes foram capturados perto de Itamaracá, Estado de Pernambuco, Brasil. A nova espécie apresenta uma semelhança superficial à Cymothoa oestrum (Linnaeus, 1793 da qual distingue-se pôr várias características. Na nova espécie, as expansões nas bases dos pereópodos ("carinae" são grandes nos 4-7 e, geralmente, terminam em pontas agudas. Em contraste, em C. oestrum, estas estruturas são pequenas nos pereópodos 4-6, grande somente no sétimo e não têm pontas agudas. Na nova espécie, somente o pleópodo 1 é simples e 2-5 apresentam bolsas e dobras. Na outra espécie, os pleópodos 1-4 são simples e somente 5 tem dobras.

  17. Granjas leiteiras na região de Ribeirão Preto - SP Dairy farms at Ribeirão Preto region - SP, Brazil

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    Adhemar P. Milani

    2010-08-01

    Full Text Available Nas atividades de exploração leiteira, as construções para os animais são fundamentais e de suma importância no processo de produção. Sendo assim, suas concepções devem basear-se em soluções técnicas e econômicas, que ofereçam condições eficientes e funcionais. O objetivo deste trabalho foi realizar um levantamento sobre as principais características de granjas leiteiras localizadas em municípios paulistas próximos a Ribeirão Preto e no sul de Minas Gerais e recomendar soluções, com base na literatura, para a execução de projeto para a região de Ribeirão Preto-SP. O trabalho foi desenvolvido com base em estudos teóricos e observações in loco, considerando as seguintes construções: galpão de estabulação livre; bezerreiro; sala de ordenha e seus anexos (pedilúvio, lava-pés e curral de espera e sistema de tratamento de dejetos. Dos resultados obtidos, verificou-se que a maioria das granjas leiteiras foi projetada sem critérios e com soluções técnicas não eficazes.On the activities of dairy farm, the constructions for the animals are basic and of utmost importance in the production process, their designs should be based on technical and economic solutions, which offer extremely efficient and functional conditions. The objectives of this work was to research and study the characteristics of dairy farms located in some towns near Ribeirão Preto and the south of Minas Gerais State and recommend solutions based on the literatures for the execution of dairy projects around Ribeirão Preto region. The study was conducted based on theoretical and in loco observations, considering the following parties of dairy farm: free stall, calves housing, milking room and its annexes (footbath, foot clean and waiting corral. The results obtained of this study appeared that most of the dairy farms were designed without technical and effective economical solutions.

  18. The onset of flood basalt volcanism, Northern Paraná Basin, Brazil: A precise U-Pb baddeleyite/zircon age for a Chapecó-type dacite

    Science.gov (United States)

    Janasi, Valdecir de Assis; de Freitas, Vivian Azor; Heaman, Larry H.

    2011-02-01

    We report the first U-Pb baddeleyite/zircon date for a felsic volcanic rock from the Paraná Large Igneous Province in south Brazil. The new date of 134.3 ± 0.8 Ma for a hypocrystalline Chapecó-type dacite from Ourinhos (northern Paraná basin) is an important regional time marker for the onset of flood basalt volcanism in the northern and western portion of the province. The dated dacite was erupted onto basement rocks and is overlain by a high-Ti basalt sequence, interpreted to be correlative with Pitanga basalts elsewhere. This new U-Pb date for the Ourinhos dacite is consistent with the local stratigraphy being slightly older than the few reliable step-heating 40Ar/39Ar dates currently available for overlying high-Ti basalts (133.6-131.5 Ma). This indicates an ~ 3 Ma time span for the building of the voluminous high-Ti lava sequence of the Paraná basin. On the other hand, it overlaps the 40Ar/39Ar dates (134.8-134.1 Ma) available for the stratigraphically older low-Ti basalt (Gramado + Esmeralda types) and dacite-rhyolite (Palmas type) sequences from South Brazil, which is consistent with the short-lived character of this volcanism and its rapid succession by the high-Ti sequence.

  19. Depositional setting, petrology and chemistry of Permian coals from the Paraná Basin: 2. South Santa Catarina Coalfield, Brazil

    Science.gov (United States)

    Kalkreuth, W.; Holz, M.; Mexias, A.; Balbinot, M.; Levandowski, J.; Willett, J.; Finkelman, R.; Burger, H.

    2010-01-01

    In Brazil economically important coal deposits occur in the southern part of the Paran?? Basin, where coal seams occur in the Permian Rio Bonito Formation, with major coal development in the states of Rio Grande de Sul and Santa Catarina. The current paper presents results on sequence stratigraphic interpretation of the coal-bearing strata, and petrological and geochemical coal seam characterization from the South Santa Catarina Coalfield, Paran?? Basin.In terms of sequence stratigraphic interpretation the precursor mires of the Santa Catarina coal seams formed in an estuarine-barrier shoreface depositional environment, with major peat accumulation in a high stand systems tract (Pre-Bonito and Bonito seams), a lowstand systems tract (Ponta Alta seam, seam A, seam B) and a transgressive systems tract (Irapu??, Barro Branco and Treviso seams).Seam thicknesses range from 1.70 to 2.39. m, but high proportions of impure coal (coaly shale and shaley coal), carbonaceous shale and partings reduce the net coal thickness significantly. Coal lithoypes are variable, with banded coal predominant in the Barro Branco seam, and banded dull and dull coal predominantly in Bonito and Irapu?? seams, respectively. Results from petrographic analyses indicate a vitrinite reflectance range from 0.76 to 1.63 %Rrandom (HVB A to LVB coal). Maceral group distribution varies significantly, with the Barro Branco seam having the highest vitrinite content (mean 67.5 vol%), whereas the Irapu?? seam has the highest inertinite content (33.8. vol%). Liptinite mean values range from 7.8. vol% (Barro Branco seam) to 22.5. vol% (Irapu?? seam).Results from proximate analyses indicate for the three seams high ash yields (50.2 - 64.2wt.%). Considering the International Classification of in-Seam Coals, all samples are in fact classified as carbonaceous rocks (>50wt.% ash). Sulfur contents range from 3.4 to 7.7 wt.%, of which the major part occurs as pyritic sulfur. Results of X-ray diffraction indicate the

  20. Serological evidence for Saint Louis encephalitis virus in free-ranging New World monkeys and horses within the upper Paraná River basin region, Southern Brazil

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    Walfrido Kühl Svoboda

    2014-06-01

    Full Text Available Introduction Saint Louis encephalitis virus (SLEV primarily occurs in the Americas and produces disease predominantly in humans. This study investigated the serological presence of SLEV in nonhuman primates and horses from southern Brazil. Methods From June 2004 to December 2005, sera from 133 monkeys (Alouatta caraya, n=43; Sapajus nigritus, n=64; Sapajus cay, n=26 trap-captured at the Paraná River basin region and 23 blood samples from farm horses were obtained and used for the serological detection of a panel of 19 arboviruses. All samples were analyzed in a hemagglutination inhibition (HI assay; positive monkey samples were confirmed in a mouse neutralization test (MNT. Additionally, all blood samples were inoculated into C6/36 cell culture for viral isolation. Results Positive seroreactivity was only observed for SLEV. A prevalence of SLEV antibodies in sera was detected in Alouatta caraya (11.6%; 5/43, Sapajus nigritus (12.5%; 8/64, and S. cay (30.8%; 8/26 monkeys with the HI assay. Of the monkeys, 2.3% (1/42 of A. caraya, 6.3% 94/64 of S. nigritus, and 15.4% (4/26 of S. cay were positive for SLEV in the MNT. Additionally, SLEV antibodies were detected by HI in 39.1% (9/23 of the horses evaluated in this study. Arboviruses were not isolated from any blood sample. Conclusions These results confirmed the presence of SLEV in nonhuman primates and horses from southern Brazil. These findings most likely represent the first detection of this virus in nonhuman primates beyond the Amazon region. The detection of SLEV in animals within a geographical region distant from the Amazon basin suggests that there may be widespread and undiagnosed dissemination of this disease in Brazil.

  1. Prevalência de enteroparasitas na população urbana do 2.° subdistrito de Botucatu, SP (Brasil Prevalence of intestinal parasites on the populations of Botucatu, SP (Brazil

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    Mauro R. de Oliveira

    1974-06-01

    Full Text Available Procurou-se conhecer a prevalência de enteroparasitoses na população urbana do 2.° subdistrito de Botucatu, SP (Brasil através de exames coprológicos realizados pelos métodos de FAUST, HOFFMAN e processo de tamização. A prevalência de enteroparasitoses foi relacionada com atributos da população, tais como sexo, idade, cor e com fatores ligados ao meio ambiente. O processo de amostragem empregado foi o casual simples em duplo estágio, sendo o quarteirão a unidade primária do primeiro estágio e o domicílio a unidade do segundo estágio. Os resultados mostraram que 53,76% das 895 pessoas amostradas apresentavam-se infestadas por uma ou mais espécies de parasitas intestinais. As prevalências foram as seguintes: Ancylostomidae, 17,54%; T. trichiurus, 13,63%; A. lumbricoides, 10,69%; S. stercoralis, 6,03%; E. vermicularis, 3,69%; H. nana, 1,79%; Taenia sp, 1,22%; S. mansoni, 0,22%; E. coli, 15,53%; G. lamblia, 14,07%; E. nana, 2,35%; I. bütschlii, 1,01% e E. histolytica, 0,22%.A study of the prevalence of intestinal parasitosis on the population of Botucatu's 2nd Subdistrict, S. Paulo, Brazil, is presented. Passed stool was examined by using FAUST, HOFFMAN and tamization techniques. The prevalence of intestinal parasites is related to population characteristics such as sex, age, race and some environmental features. Simple random sampling technique in double stage was applied. Among 895 examined persons, 53,76% were infected by intestinal parasites. The prevalence of the various parasites were: Ancylostomydae, 17,54%; T. trichiurus, 13,63%; A. lumbricoides, 10,39%; E. vermiculares, 3,69%; H. nana, 1,79%; Taenia sp, 1,22%; E. coli, 15,53%; G. lamblia, 14,07%; E. nana, 2,35%; I. bütschlii, 1,01% and E. histolytica, 0,22%.

  2. A survey of the arbuscular mycorrhiza occurrence in paepalanthus bromelioides and Bulbostylis sp. in rupestrian fields, Brazil

    OpenAIRE

    PAGANO, M.C.; SCOTTI, M. R.

    2009-01-01

    Este estudio registra el porcentaje de colonización micorrízica, así como la densidad de esporas, de hongos micorrízico arbusculares de Paepalanthus bromelioides (Eriocaulaceae) y Bulbostylis sp. (Cyperaceae) en el sureste de Brasil. El muestreo del suelo y raíces de estas especies se realizó en 2006. Se identificaron las esporas de hongos micorrízico arbusculares y se evaluó la colonización en las raíces. Las dos especies vegetales mostraron micotrofía. Los tres géneros de hongos micorrízico...

  3. Assessment of {sup 222}Rn occupational exposure at IPEN nuclear materials storage site, SP, Brazil; Avaliacao da exposicao ocupacional ao {sup 222}Rn no galpao da Salvaguardas do IPEN, SP

    Energy Technology Data Exchange (ETDEWEB)

    Caccuri, Lilian Saueia

    2007-07-01

    In this study it was assessed the occupational exposure to {sup 222}Rn at IPEN, SP, Brazil, nuclear materials storage site through the committed effective dose received by workers exposed to this radionuclide. The radiation dose was calculated through the radon concentrations at nuclear materials storage site. Radon concentrations were determined by passive detection method with solid state nuclear detectors (SSNTD). The SSNTD used in this study was the polycarbonate Makrofol E; each detector is a small square plastic of 1 cm{sup 2}, placed into a diffusion chamber type KFK. It was monitored 14 points at nuclear materials storage site and one external point, over a period of 21 months, changing the detectors every three months, from December 2004 to September 2006. The {sup 222}Rn concentrations varied from 196 {+-} 9 and 2048 {+-} 81 Bq{center_dot}m{sup -3}. The committed effective dose due to radon inhalation at IPEN nuclear materials storage site was obtained from radon activity incorporated and dose conversion factor, according to International Commission on Radiological Protection procedures. The effective committed dose received by workers is below 20 mSv{center_dot}y{sup -1}. This value is suggested as an annual effective dose limit for occupational exposure by ICRP 60. (author)

  4. Production and Partial Characterization of Cellulases from Trichoderma sp. IS-05 Isolated from Sandy Coastal Plains of Northeast Brazil

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    Jackeline Pereira Andrade

    2011-01-01

    Full Text Available This study evaluated the production of cellulolytic enzymes by Trichoderma sp. IS-05 strain, isolated from sand dunes, according to its ability to grow on cellulose as carbon source. Wheat bran was tested as the carbon source and peptone tested as the nitrogen source. Different concentrations of carbon and nitrogen were tested using a factorial design to identify optimal cellulase activity production. The results showed that media containing wheat bran 4.0% (w/v and peptone 0.25% (w/v lead to the highest production, 564.0 U L−1 of cellulase, obtained after 2 days of fermentation. The pH and temperature profile showed optimal activity at pH 3.0 and 60∘C. As for thermostability, the cellulase was most tolerant at 60∘C, retaining more than 59.6% of maximal activity even after 4 hours of incubation. The combination of acid pH, high temperature tolerance, and production of cellulase from agro-industrial residues by Trichoderma sp. IS-05 offers possibilities condition for the biomass hydrolysis process to produce bioethanol.

  5. Molecular detection of Leishmania sp. in cats (Felis catus) from Andradina Municipality, São Paulo State, Brazil.

    Science.gov (United States)

    Coelho, Willian Marinho Dourado; Richini-Pereira, Virgínia Bodelão; Langoni, Helio; Bresciani, Katia Denise Saraiva

    2011-03-10

    The aim of this work was to molecularly detect Leishmania species in 52 cats from Andradina Municipality, São Paulo State, Brazil. The direct parasitological test was performed by using imprints of poplited lymph node, bone marrow and spleen to verify amastigote forms of Leishmania spp. The samples that were positive parasitological tests were subjected to molecular analysis (PCR) and sequencing. Infection was detected for 5.76% (3/52) of the examined cats and two had presence of amastigote forms of Leishmania spp. in lymph nodes. Polymerase chain reaction (PCR) of kinetoplast minicircle DNA, indicated positive amplification for samples of spleen and lymph nodes and the sequencing resulted in 97% similarity with Leishmania (L.) chagasi. This study proved the occurrence of infection with Leishmania (L.) chagasi in felines from Andradina municipality, São Paulo State.

  6. Draft genome sequence of Bradyrhizobium sp. strain BR 3262, an effective microsymbiont recommended for cowpea inoculation in Brazil

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    Jean Luiz Simões-Araújo

    Full Text Available Abstract The strain BR 3262 was isolated from nodule of cowpea (Vigna unguiculata L. Walp growing in soil of the Atlantic Forest area in Brazil and it is reported as an efficient nitrogen fixing bacterium associated to cowpea. Firstly, this strain was assigned as Bradyrhizobium elkanii, however, recently a more detailed genetic and molecular characterization has indicated it could be a Bradyrhizobium pachyrhizi species. We report here the draft genome sequence of B. pachyrhizi strain BR 3262, an elite bacterium used as inoculant for cowpea. The whole genome with 116 scaffolds, 8,965,178 bp and 63.8% of C+G content for BR 3262 was obtained using Illumina MiSeq sequencing technology. Annotation was added by the RAST prokaryotic genome annotation service and shown 8369 coding sequences, 52 RNAs genes, classified in 504 subsystems.

  7. Draft genome sequence of Bradyrhizobium sp. strain BR 3262, an effective microsymbiont recommended for cowpea inoculation in Brazil.

    Science.gov (United States)

    Simões-Araújo, Jean Luiz; Leite, Jakson; Marie Rouws, Luc Felicianus; Passos, Samuel Ribeiro; Xavier, Gustavo Ribeiro; Rumjanek, Norma Gouvêa; Zilli, Jerri Édson

    The strain BR 3262 was isolated from nodule of cowpea (Vigna unguiculata L. Walp) growing in soil of the Atlantic Forest area in Brazil and it is reported as an efficient nitrogen fixing bacterium associated to cowpea. Firstly, this strain was assigned as Bradyrhizobium elkanii, however, recently a more detailed genetic and molecular characterization has indicated it could be a Bradyrhizobium pachyrhizi species. We report here the draft genome sequence of B. pachyrhizi strain BR 3262, an elite bacterium used as inoculant for cowpea. The whole genome with 116 scaffolds, 8,965,178bp and 63.8% of C+G content for BR 3262 was obtained using Illumina MiSeq sequencing technology. Annotation was added by the RAST prokaryotic genome annotation service and shown 8369 coding sequences, 52 RNAs genes, classified in 504 subsystems.

  8. Primeiro registro de ocorrência do parasitóide Brasema sp. (hymenoptera: eupelmidae em ovos de Leptoglossus zonatus (Dallas, 1852 (hemiptera: coreidae no Brasil First record of occurrence of the parasitoid Brasema sp. (hymenoptera: eupelmidae in eggs of Leptoglossus zonatus (Dallas, 1852 (hemiptera: coreidae in Brazil

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    Carlos Henrique Marchiori

    2002-12-01

    Full Text Available Este trabalho registra a primeira ocorrência do parasitóide Brasema sp. (Hymenoptera: Eupelmidae parasitando ovos de Leptoglossus zonatus (Hemiptera: Coreidae em cultivar de milho em Itumbiara, GO. A porcentagem de parasitismo foi de 4,8%. Brasema sp. constitue-se em ectoparasitóide de larvas de coleópteros e de outros hospedeiros no interior de tecidos de plantas.This work reports, for the first time, of parasitoid Brasema sp. (Hymenoptera: Eupelmidae parasitizinf eggs of Leptoglossus zonatus (Hemiptera: Coreidae in maize cultivate in Itumbiara, GO, Brazil. The percentage of parasitizing was 4,8%. Brasema sp. constitutes ectoparasitoid of beetle larvae and other hosts concealed in plant tissue.

  9. An unusual, dwarf new species of Neotropical freshwater stingray, Plesiotrygon nana sp. nov., from the upper and mid Amazon basin: the second species of Plesiotrygon (Chondrichthyes: Potamotrygonidae

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    Marcelo R. de Carvalho

    2011-01-01

    Full Text Available A new species of the relatively poorly known Neotropical freshwater stingray genus Plesiotrygon Rosa, Castello & Thorson, 1987 is described from the main channel and smaller tributaries (Ríos Itaya and Pachitea of the upper Amazon basin in Peru. The first specimen to be collected, however, was from much farther east in Rio Solimões in 1996, just down-river from Rio Purus (specimen unavailable for this study. Plesiotrygon nana sp. nov., is a very distinctive and unusually small species of freshwater stingray (Potamotrygonidae, described here mostly from three specimens representing different size classes and stages of sexual maturity. Plesiotrygon nana sp. nov., is distinguished from its only congener, P. iwamae Rosa, Castello & Thorson, 1987, by numerous unique features, including: dorsal coloration composed of very fine rosettes or a combination of spots and irregular ocelli; very circular disc and snout; very small and less rhomboidal spiracles; short snout and anterior disc region; narrow mouth and nostrils; denticles on dorsal tail small, scattered, not forming row of enlarged spines; adult and preadult specimens with significantly fewer tooth rows; fewer caudal vertebrae; higher total pectoral radials; very small size, probably not surpassing 250 mm disc length or width, males maturing sexually at around 180 mm disc length and 175 mm disc width; distal coloration of tail posterior to caudal stings usually dark purplish-brown; and features of the ventral lateral-line canals (hyomandibular canal very narrow, infraorbital and supraorbital canals not undulated, supraorbital and infraorbital loops small and narrow, supraorbital loop very short, not extending posteriorly to level of mouth, jugular and posterior infraorbital canals short, not extending caudally to first gill slits, subpleural loop very narrow posteriorly; absence of anterior and posterior subpleural tubules. To provide a foundation for the description of P. nana sp. nov

  10. Reliability of the supply from the REPLAN - Refinaria do Planalto Paulista and REVAP - Refinaria Henrique Lage refineries, SP, Brazil; Confiabilidade do suprimento das refinarias REPLAN - Refinaria do Planalto Paulista e da REVAP - Refinaria Henrique Lage, SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Lima Neto, Alvaro Correa de; Silva, Eduardo Onofre de Andrade [PETROBRAS Transporte S.A. (TRANSPETRO), Rio de Janeiro, RJ (Brazil)

    2005-07-01

    This technical study was developed with unpublished methodology in Brazil, it joined an evaluation of pipeline failure probability considering results of intelligent pig inspections, their uncertainties and the modelling of Reliability Systems. The objective of study was in a first moment to identify among the possible improvements for the operational continuity and reliability of the system, those that presented better cost/benefit analysis. In the medium and long period the objective was to make available for TRANSPETRO a model that could be updated and used considering new information of inspections and new data of equipment failures, so that of here forward to the decisions could count with more elements in terms of cost/benefit analysis. The first phase of the work was developed with consultancy expresses, for elaboration of the models, the second this being developed with own resources and it consists of the updating of the modelling, considering new inspections accomplished in pipeline OSVAT and consideration of new sceneries of modifications in the system. (author)

  11. Depositional tracts and stratigraphic architecture of the Itajaí Basin sedimentary sucessions (Neoproterozoic, northeastern Santa Catarina, Brazil

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    Michel Silva Costa

    2015-06-01

    Full Text Available Neoproterozoic sedimentary successions of the Itajaí Basin show depositional trends and a stratigraphic framework characteristics of foreland basin system. The sedimentary environments have developed in basin conditions ranging from deep marine context, transitional shallow marine, to continental. Stratigraphic architecture comprises three depositional tracts (DT: DTI - submarine fans system that records the initial basin sedimentation and involves frontal and distal turbiditic deposits; DTII - transitional to shallow marine depositional system that represents the efective infill fase of basin, and includes deltaic succession with braided channels dominated plain; and DTIII - fluvial braided and alluvial fan depositional system that comprises the final stage of basin sedimentation. Arkoses and greywacke of the DTI present paleocurrent unimodals patterns and general trend to south-southeast, suggesting source area from Santa Catarina Granulitic Complex. The sandstones and conglomerates of DTII and DTIII have opposite paleocurrent pattern, indicating source area from both Metamorphic Brusque Complex and Florianópolis Batolith. Integration of paleoenvironmental and stratigraphic data, with previous information (U-Pb in detrital zircon, allowed a consistent interpretation on the sedimentary evolution and detrital sources of the basin and represent a progress on the discussions on the knowledge of the Itajaí Basin and its significance in the evolutionary context of the Dom Feliciano Belt.

  12. Modeling pollution potential input from the drainage basin into Barra Bonita reservoir, São Paulo – Brazil

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    RB. Prado

    Full Text Available In this study multi-criteria modeling tools are applied to map the spatial distribution of drainage basin potential to pollute Barra Bonita Reservoir, São Paulo State, Brasil. Barra Bonita Reservoir Basin had undergone intense land use/land cover changes in the last decades, including the fast conversion from pasture into sugarcane. In this respect, this study answers to the lack of information about the variables (criteria which affect the pollution potential of the drainage basin by building a Geographic Information System which provides their spatial distribution at sub-basin level. The GIS was fed by several data (geomorphology, pedology, geology, drainage network and rainfall provided by public agencies. Landsat satellite images provided land use/land cover map for 2002. Ratings and weights of each criterion defined by specialists supported the modeling process. The results showed a wide variability in the pollution potential of different sub-basins according to the application of different criterion. If only land use is analyzed, for instance, less than 50% of the basin is classified as highly threatening to water quality and include sub basins located near the reservoir, indicating the importance of protection areas at the margins. Despite the subjectivity involved in the weighing processes, the multi-criteria analysis model allowed the simulation of scenarios which support rational land use polices at sub-basin level regarding the protection of water resources.

  13. [Triatoma vandae sp.n. of the oliveirai complex from the State of Mato Grosso, Brazil (Hemiptera: Reduviidae: Triatominae)].

    Science.gov (United States)

    Carcavallo, Rodolfo U; Jurberg, José; Rocha, Dayse da Silva; Galvao, Cleber; Noireau, François; Lent, Herman

    2002-07-01

    There are several specific complexes belonging to the genus Triatoma Laporte, 1832, which are generally associated to specific geographic areas. Recent publications have linked the oliveirai complex to ecosystems of Mato Grosso, which are also present in other Brazilian states and even in other bordering countries as eastern Paraguay. The study of the abundant material collected during the last years allowed the description of several new species of the oliveirai complex: T. jurbergi Carcavallo, Galvão Lent, 1998; T. baratai Carcavallo Jurberg, 2000 and T. klugi Carcavallo, Jurberg, Lent Galvão, 2001. Another new species belonging to the same complex is described here as T. vandae sp.n. It originates from the state of Mato Grosso, and has been reared in the insectary of the Laboratório Nacional e Internacional de Referência em Taxonomia de Triatomíneos, Departamento de Entomologia, Instituto Oswaldo Cruz-Fiocruz, Rio de Janeiro.

  14. Acromyrmex ameliae sp. n. (Hymenoptera: Formicidae): A new social parasite of leaf-cutting ants in Brazil

    Institute of Scientific and Technical Information of China (English)

    DANIVAL JOS(E) DE SOUZA; ILKA MARIA FERNANDES SOARES; TEREZINHA MARIA CASTRO BELLA LUCIA

    2007-01-01

    The fungus-growing ants (Tribe Attini) are a New World group of > 200 species, all obligate symbionts with a fungus they use for food. Four attine taxa are known to be social parasites of other attines. Acromyrmex (Pseudoatto) argentina argentina and Acromyrmex (Pseudoatta) argentina platensis (parasites of Acromyrmex lundi), and Acromyrmex sp. (a parasite of Acromyrmex rugosus) produce no worker caste. In contrast, the recently discovered Acromyrmex insinuator (a parasite of Acromyrmex echinatior) does produce workers. Here, we describe a new species, Acromyrmex ameliae, a social parasite of Acromyrmex subterraneus subterraneus and Acromyrmex subterraneus brunneus in Minas Gerais, Brasil. Like A. insinuator, it produces workers and appears to be closely related to its hosts. Similar social parasites may be fairly common in the fungus-growing ants, but overlooked due to the close resemblance between parasite and host workers.

  15. Draft genome sequence of Bradyrhizobium sp. strain BR 3267, an elite strain recommended for cowpea inoculation in Brazil.

    Science.gov (United States)

    Simões-Araújo, Jean Luiz; Leite, Jakson; Passos, Samuel Ribeiro; Xavier, Gustavo Ribeiro; Rumjanek, Norma Gouvêa; Zilli, Jerri Édson

    The strain BR 3267 is a nitrogen-fixing symbiotic bacteria isolated from soil of semi-arid area of Brazilian Northeast using cowpea as the trap plant. This strain is used as commercial inoculant for cowpea and presents high efficient in nitrogen fixation as consequence of its adaptation potential to semi-arid conditions. We report here the draft genome sequence of Bradyrhizobium sp. strain BR 3267, an elite bacterium used as inoculant for cowpea. Whole genome sequencing of BR 3267 using Illumina MiSeq sequencing technology has 55 scaffolds with a total genome size of 7,904,309bp and C+G 63%. Annotation was added by the RAST prokaryotic genome annotation service and has shown 7314 coding sequences and 52 RNA genes.

  16. Draft genome sequence of Bradyrhizobium sp. strain BR 3267, an elite strain recommended for cowpea inoculation in Brazil

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    Jean Luiz Simões-Araújo

    Full Text Available Abstract The strain BR 3267 is a nitrogen-fixing symbiotic bacteria isolated from soil of semi-arid area of Brazilian Northeast using cowpea as the trap plant. This strain is used as commercial inoculant for cowpea and presents high efficient in nitrogen fixation as consequence of its adaptation potential to semi-arid conditions. We report here the draft genome sequence of Bradyrhizobium sp. strain BR 3267, an elite bacterium used as inoculant for cowpea. Whole genome sequencing of BR 3267 using Illumina MiSeq sequencing technology has 55 scaffolds with a total genome size of 7,904,309 bp and C+G 63%. Annotation was added by the RAST prokaryotic genome annotation service and has shown 7314 coding sequences and 52 RNA genes.

  17. Morphological aspects of Henneguya aequidens n. sp. (Myxozoa: Myxobolidae) in Aequidens plagiozonatus Kullander, 1984 (Teleostei: Cichlidae) in the Amazon region, Brazil.

    Science.gov (United States)

    Videira, Marcela; Velasco, Michele; Azevedo, Rodney; Silva, Reinaldo; Gonçalves, Evonnildo; Matos, Patrícia; Matos, Edilson

    2015-03-01

    A new species of Myxosporea, Henneguya aequidens sp. n. (Myxozoa: Myxobolidae), was described based on its ultrastructural features. This is a parasite of the freshwater fish Aequidens plagiozonatus, in the Peixe-boi River, Pará, Brazil. This parasite was found in the gills, in the form of whitish ellipsoid cysts with mature spores inside them. The average spore body was 15 ± 0.9 μm in length (n = 30) and 6 ± 0.8 μm in width (n = 30), and the tail measured 27 ± 0.5 μm in length (n = 15). The spores showed typical features of the genus Henneguya with two valves of equal size and two symmetrical polar capsules of 3 ± 0.3 μm in length and 2 ± 0.3 μm in width. Each polar capsule had a polar filament forming a helix from the apical region to the polar caps, with four to six turns. Based on the ultrastructural differences in morphology of these spores, the location of the parasite, and its host specificity, this parasite was described as a new species.

  18. Plasmodium kentropyxi n.sp. (Apicomplexa: Haemosporina: Plasmodiidae and a Plasmodium tropiduri-like parasite in the lizard Kentropyx calcarata (Lacertilia: Teiidae in North Brazil

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    Lainson R.

    2001-06-01

    Full Text Available Plasmodium kentropyxi n.sp. is described in the teiid lizard Kentropyx calcarata from north Brazil. Young asexual stages and gametocytes are at first polar in the erythrocyte but with elongation, move to a lateral position. Largest meronts seen contained from 30-40 nuclei and conspicuous greenish-black pigment granules located in a distinct vacuole. With growth the gametocytes eventually assume a smooth, curved cylindrical shape, with evenly rounded ends. Pigment is scattered or concentrated around a conspicuous vacuole which is slowly developed as the gametocytes mature. Mature male parasites measured 11.8 x 4.0 μm (9.6 x 4.2 - 13.2 x 3.6 μm, shape-index 2.9 (2.2 - 5.0, and females 13.5 x 4.5 μm (12.0 x 4.5 - 15.0 x 4.8 μm, shape-index 3.0 (2.2 - 3.8. Some larger meronts may slightly enlarge the erythrocyte, but most asexual stages and the mature gametocytes rarely do so. A second, P. tropiduri-like parasite encountered in K. calcarata possessed small rounded or fan-shaped meronts producing from 4-14 merozoites, and spherical to subspherical gametocytes of approximately 6.0 x 5.0 μm. The parasite was consistently polar in its position in the erythrocyte.

  19. Plasmodium kentropyxi n.sp. (Apicomplexa: Haemosporina: Plasmodiidae) and a Plasmodium tropiduri-like parasite in the lizard Kentropyx calcarata (Lacertilia: Teiidae) in north Brazil.

    Science.gov (United States)

    Lainson, R; Landau, I; Paperna, I

    2001-06-01

    Plasmodium kentropyxi n.sp. is described in the teiid lizard Kentropyx calcarata from north Brazil. Young asexual stages and gametocytes are at first polar in the erythrocyte but with elongation, move to a lateral position. Largest meronts seen contained from 30-40 nuclei and conspicuous greenish-black pigment granules located in a distinct vacuole. With growth the gametocytes eventually assume a smooth, curved cylindrical shape, with evenly rounded ends. Pigment is scattered or concentrated around a conspicuous vacuole which is slowly developed as the gametocytes mature. Mature male parasites measured 11.8 x 4.0 microns (9.6 x 4.2 - 13.2 x 3.6 microns), shape-index 2.9 (2.2 - 5.0), and females 13.5 x 4.5 microns (12.0 x 4.5 - 15.0 x 4.8 microns), shape-index 3.0 (2.2 - 3.8). Some larger meronts may slightly enlarge the erythrocyte, but most asexual stages and the mature gametocytes rarely do so. A second, P. tropiduri-like parasite encountered in K. calcarata possessed small rounded or fan-shaped meronts producing from 4-14 merozoites, and spherical to subspherical gametocytes of approximately 6.0 x 5.0 microns. The parasite was consistently polar in its position in the erythrocyte.

  20. Carcinopodacarus polymorphus gen. n. et sp. n. from Guira guira (Cuculiformes: Cuculidae) in Brazil: a first example of male polymorphism in the family Dermationidae (Acariformes: Analgoidea).

    Science.gov (United States)

    Hernandes, Fabio Akashi; Pedroso, Luiz Gustavo A; Bochkov, Andre V

    2015-01-01

    Carcinopodacarus polymorphus gen. n. et sp. n. (Acariformes: Dermationidae: Dermationinae) is described from the guira cuckoo Guira guira (Gmelin) (Cuculiformes: Cuculidae) in Brazil. The new genus differs from the closest genus, Psittophagoides Fain, 1964, by the following features: in both sexes, the anterior spines of trochanters I and II are absent (vs present in Psittophagoides), setae d2 are distinctly developed (vs only alveoli), and genual setae mGI are absent (vs present); in males, the hysteronotal shield is split transversally at the level of trochanters III (vs hysteronotal shield entire); in females, the platelets situated posterior to the propodonotal shield are absent (vs present), the metapodosomal sclerites are present (vs absent), and the adanal shields are fused anteriorly to each other (vs separated from each other). In this species, andropolymorphism is detected for the first time for the family. It involves various characters but the most impressive feature is the structure of legs III. In hetero- and mesomorphic males, these legs are strongly hypertrophied and have a distinct ventral spur on femora III; in homeomorphic males, legs III are not modified and subequal to legs IV.

  1. Detection of hemoplasma and Bartonella species and co-infection with retroviruses in cats subjected to a spaying/neutering program in Jaboticabal, SP, Brazil.

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    de Bortoli, Caroline Plácidi; André, Marcos Rogério; Seki, Meire Christina; Pinto, Aramis Augusto; Machado, Saulo de Tarso Zacarias; Machado, Rosangela Zacarias

    2012-01-01

    Hemotrophic mycoplasmas and Bartonella species are important pathogens that circulate between cats and invertebrate hosts, occasionally causing diseases in humans. Nevertheless, there are few reports on occurrences of these agents in cats in Brazil. The present study aimed to detect the presence of hemoplasma and Bartonella DNA by means of PCR and sequencing. FIV antigens and anti-FeLV antibodies, were studied by using a commercial kit on blood and serum samples, respectively, among 46 cats that were sampled during a spaying/neutering campaign conducted in Jaboticabal, SP. Three (6.5%) cats were positive for hemoplasmas: two (4.3%) for 'Candidatus M. haemominutum' and one (2.2%) for both M. haemofelis and 'Candidatus M. turicensis'. One of the two 'Candidatus M. haemominutum'-infected cats was also positive for FeLV antigens and showed antibodies for FIV. Two cats (4.3%) were positive for B. henselae. One of them was also positive for FeLV antigens. Eight cats (17.4%) were positive for FeLV, and just one (2.2%) showed anti-FIV antibodies. Bartonella species and hemoplasmas associated with infection due to retroviruses can circulate among apparently healthy cats.

  2. Initial identification and sensitivity to antimicrobial agents of Salmonella sp.isolated from poultry products in the state of Ceara, Brazil

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    WF Oliveira

    2006-09-01

    Full Text Available The objective of this research was to isolate and to verify the sensitivity to antimicrobial agents of strains of Salmonella sp. isolated from poultry products in the state of Ceara, Brazil. A total number of 114 samples was collected from 63 broiler carcasses derived from two processing plants and two supermarkets, and 51 excreta samples were collected in broiler farms located in the state of Ceara, which used three live production stages. Each excreta sample consisted of a fresh excreta pool from 100 birds. Samples were submitted to microbiological analyses, and the isolated Salmonella strains were tested for antimicrobial sensitivity. No Salmonella was isolated from excreta samples, while broiler carcass samples showed a high contamination rate of11.8%. Three serotypes were identified: Salmonella enterica serovar Enteritidis, 50%; Salmonella enterica serovar Panama 33%, and Salmonella enterica serovar Newport, 17%. As to the susceptibility tests to antimicrobial agents, 100% of the isolated Salmonella strains showed resistance to Ampicillin and Tetracycline, and sensitivity to Gentamycin, Netilmycin, Carbenicillin, Chloramphenicol.

  3. Microbispora sp. LGMB259 endophytic actinomycete isolated from Vochysia divergens (Pantanal, Brazil) producing β-carbolines and indoles with biological activity.

    Science.gov (United States)

    Savi, Daiani C; Shaaban, Khaled A; Vargas, Nathalia; Ponomareva, Larissa V; Possiede, Yvelise M; Thorson, Jon S; Glienke, Chirlei; Rohr, Jürgen

    2015-03-01

    Endophytic actinomycetes encompass bacterial groups that are well known for the production of a diverse range of secondary metabolites. Vochysia divergens is a medicinal plant, common in the "Pantanal" region (Brazil) and was focus of many investigations, but never regarding its community of endophytic symbionts. During a screening program, an endophytic strain isolated from the V. divergens, was investigated for its potential to show biological activity. The strain was characterized as Microbispora sp. LGMB259 by spore morphology and molecular analyze using nucleotide sequence of the 16S rRNA gene. Strain LGMB259 was cultivated in R5A medium producing metabolites with significant antibacterial activity. The strain produced 4 chemically related β-carbolines, and 3 Indoles. Compound 1-vinyl-β-carboline-3-carboxylic acid displayed potent activity against the Gram-positive bacterial strains Micrococcus luteus NRRL B-2618 and Kocuria rosea B-1106, and was highly active against two human cancer cell lines, namely the prostate cancer cell line PC3 and the non-small-cell lung carcinoma cell line A549, with IC50 values of 9.45 and 24.67 µM, respectively. 1-Vinyl-β-carboline-3-carboxylic acid also showed moderate activity against the yeast Saccharomyces cerevisiae ATCC204508, as well as the phytopathogenic fungi Phyllosticta citricarpa LGMB06 and Colletotrichum gloeosporioides FDC83.

  4. [Analysis of the health and living conditions of the urban population of Botucatu, SP (Brazil). II. Knowledge and opinion of the population on symptoms of diseases].

    Science.gov (United States)

    Carandina, L; Magaldi, C

    1989-06-01

    It was verified the extent of the information of the urban population of Botucatu, SP (Brazil) on health questions. Knowledge and opinions about frequency and severity of thirteen symptoms and signs of disease were researched in 1005 families sampled. The answers were analyzed according to age, sex, level of education and socio-economic level. They showed a tendency compatible with scientific medical knowledge. In the comparison of the sexes, by age, (young adult) women gave more value to the frequency and severity of most of the symptoms than men. The high scores observed for severity showed a tendency to decrease with the increasing level of education for all the symptoms. There were variations among the symptoms in the appreciation of frequency according to the socio-economic level, with a tendency to a decrease in the high scores related to severity, according to the increase in socio-economic level. The degree of information observed in the population contradicts the prejudice, still existing in the medical area, about laymen's lack of knowledge. The hypothesis that the sample studied had access to several sources of information, among them the extensive local network of medical services, is put forward.

  5. Characterization of environmental quality of forest fragments changes in Jundiaí-Mirim river basin-Brazil using the Markov Chain model

    Science.gov (United States)

    Hasimoto Fengler, Felipe; Leite de Moraes, Jener Fernando; Irio Ribeiro, Admilson; Peche Filho, Afonso; Araujo de Medeiros, Gerson; Baldin Damame, Desirée; Márcia Longo, Regina

    2015-04-01

    In Brazil is common practice the concurrency of large urban centers water catchment in distant sites. There's no policy to preserve strategic springs in the urban territory. Thus, rural areas, located in the surrounds of municipals, usually provide water and others environment services to the population that reside on cities. The Jundiaí-Mirim river basin, located in the most urbanized state in Brazil, São Paulo, composes an interesting example of this situation. It is located in a rural area near large urban centers, with large industrial parks, near the capital of state. As result of expansion of the cities on its surrounds their lands have had a historic of monetary valorization, making its territories attractive to the housing market. Consequently, the region has an intense process of urbanization that resulted in an increasing environmental disturbance in the areas of natural vegetation. In the other hand, the watershed is the principal water supplier of Jundiaí city, and houses forest remaining of an important Biome in Brazil, the Atlantic Rain Forest. Given the need to preserve its water production capacity and the forest remnants there, this study modeled the environmental quality of forest fragments through indicators of disturbance and evaluated the changes that occur between 1972 and 2013 using the Markov Chain model. The environment quality was determined by nine indicators of environmental disturbance (distance of urban areas, roads, edge land use, size, distance of others forest fragments, land capacity of use, watershed forest cover, number of forest fragments in the watersheds, shape of the forest fragment), obtained by techniques of Geoprocessing, and integrated by Multicriteria Analysis. The Markov Chain model showed a constant tendency of deteriorating in natural vegetation environmental quality, attributed to the intense process of occupation of the river basin. The results showed a historical trend of transformation in forest fragments with

  6. Taeniosis-cysticercosis complex in individuals of a peasants' settlement (Teodoro Sampaio, Pontal of Paranapanema, SP, Brazil

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    Prestes-Carneiro Luiz Euribel

    2006-01-01

    Full Text Available In order to evaluate the taeniosis-cysticercosis complex in a population of a peasants' settlement, located at Teodoro Sampaio, state of São Paulo, Brazil (longitude 52degrees 36'12 ", latitude 22degrees 17'12 " a series of laboratory markers were determined. After signing an informed consent, participants answered a standardized questionnaire. To determine anti-Taenia solium cysticercus antibodies, the samples were tested by enzyme linked immunoabsorbent assay using 18-and 14-kDa antigen proteins from vesicular fluid of Taenia crassiceps (VF-Tcra. The reactive and inconclusive ELISA samples were tested by immunoblotting. Total IgE levels were determined by chemmiluminescence's assay and hemogram by flow cytometer flux counter. A total of 84 individuals, 5.9% presented anti-T. solium cysticercus antibodies in ELISA and 3.6% were strongly reactive in the 18/14 kDa immunoblotting confirmatory test. All of the individuals with positive antibodies showed elevated Total IgE levels. We conclude that the frequency of anti-T. solium cysticercus antibodies in this population is higher than other regions considered endemic in São Paulo. Thus, it is important to carry out surveys in Peasants' settlement areas with the objective of establishing public health measures for prevention and control of infectious diseases such as taeniosis-cysticercosis.

  7. Fusarium paranaense sp. nov., a member of the Fusarium solani species complex causes root rot on soybean in Brazil.

    Science.gov (United States)

    Costa, Sarah S; Matos, Kedma S; Tessmann, Dauri J; Seixas, Claudine D S; Pfenning, Ludwig H

    2016-01-01

    Isolates of Fusarium obtained from soybean plants showing symptoms of root rot collected in subtropical southern and tropical central Brazil were characterized based on phylogenetic analyses, sexual crossing, morphology, and pathogenicity tests. A novel species within the Fusarium solani species complex (FSSC) causing soybean root rot is formally described herein as Fusarium paranaense. This species can be distinguished from the other soybean root rot pathogens in the FSSC, which are commonly associated with soybean sudden death syndrome (SDS) based on analyses of the combined DNA sequences of translation elongation factor 1-α and the second largest subunit of RNA polymerase II and on interspecies mating compatibility. Bayesian and maximum parsimony phylogenetic analyses showed that isolates of F. paranaense formed a distinct group in clade 3 of the FSSC in contrast to the pathogens currently known to cause SDS, which are in clade 2. Female fertile tester strains were developed that can be used for the identification of this new species in the FSSC based on sexual crosses. All isolates were heterothallic and belonged to a distinct mating population. Fusarium tucumaniae, a known SDS pathogen, was found in the subtropical southern region of the country.

  8. Desulfovibrio brasiliensis sp. nov., a moderate halophilic sulfate-reducing bacterium from Lagoa Vermelha (Brazil) mediating dolomite formation.

    Science.gov (United States)

    Warthmann, Rolf; Vasconcelos, Crisogono; Sass, Henrik; McKenzie, Judith A

    2005-06-01

    A novel halotolerant sulfate-reducing bacterium, Desulfovibrio brasiliensis strain LVform1, was isolated from sediments of a dolomite-forming hypersaline coastal lagoon, Lagoa Vermelha, in the state of Rio de Janeiro, Brazil. The cells are vibrio-shaped and 0.30 to 0.45 microm by 1.0 to 3.5 microm in size. These bacteria mediate the precipitation of dolomite [CaMg(CO3)2] in culture experiments. The strain was identified as a member of the genus Desulfovibrio in the delta-subclass of the Proteobacteria on the basis of its 16S rRNA gene sequence, its physiological and morphological properties. Strain LVform1 is obligate sodium-dependent and grows at NaCl concentrations of up to 15%. The 16S rRNA sequence revealed that this strain is closely related to Desulfovibrio halophilus (96.2% similarity) and to Desulfovibrio oxyclinae (96.8% similarity), which were both isolated from Solar Lake, a hypersaline coastal lake in the Sinai, Egypt. Strain LVform1 is barotolerant, growing under pressures of up to 370 bar (37 MPa). We propose strain LVform1 to be the type strain of a novel species of the genus Desulfovibrio, Desulfovibrio brasiliensis (type strain LVform1 = DSMZ No. 15816 and JCM No. 12178). The GenBank/EMBL accession number for the 16S rDNA sequence of strain LVform1 is AJ544687.

  9. Tabanidae (Diptera do estado do Maranhão, Brasil: III. Descrição de Philipotabanus (Mimotabanus henriquesi sp. nov. Tabanidae (Diptera from the state of Maranhão, Brazil: III. Description of Philipotabanus (Mimotabanus henriquesi sp. nov.

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    Francisco Limeira-de-Oliveira

    2009-12-01

    Full Text Available Philipotabanus (Mimotabanus henriquesi sp. nov. é descrita e ilustrada baseada em 30 fêmeas e dois machos coletados em vegetação de Cerrado, nos municípios de Carolina, Alto Parnaíba e Mirador, região sul do estado do Maranhão, Brasil. Este é o primeiro registro de uma espécie do subgênero no Brasil.Philipotabanus (Mimotabanus henriquesi, sp. nov., is described and illustrated based on 30 females and two males specimens collected in open vegetation of "Cerrado", in Carolina, Alto Parnaíba and Mirador municipalities, in southern Maranhão state, Brazil. This is the first record of species of the subgenus in Brazil.

  10. Somatosensory Psychophysical Losses in Inhabitants of Riverside Communities of the Tapajós River Basin, Amazon, Brazil: Exposure to Methylmercury Is Possibly Involved.

    Science.gov (United States)

    Khoury, Eliana Dirce Torres; Souza, Givago da Silva; da Costa, Carlos Araújo; de Araújo, Amélia Ayako Kamogari; de Oliveira, Cláudia Simone Baltazar; Silveira, Luiz Carlos de Lima; Pinheiro, Maria da Conceição Nascimento

    2015-01-01

    The purpose of this work was to evaluate the somatosensory system of methylmercury-exposed inhabitants living in the communities of the Tapajós river basin by using psychophysical tests and to compare with measurements performed in inhabitants of the Tocantins river basin. We studied 108 subjects from Barreiras and São Luiz do Tapajós, two communities of the Tapajós river basin, State of Pará, Amazon, Brazil, aged 13-53 years old. Mercury analysis was performed in head hair samples weighting 0.1-0.2 g by using atomic absorption spectrometry. Three somatosensory psychophysical tests were performed: tactile sensation threshold, vibration sensation duration, and two-point discrimination. Semmes-Weinstein 20 monofilaments with different diameters were used to test the tactile sensation in the lower lip, right and left breasts, right and left index fingers, and right and left hallux. The threshold was the thinner monofilament perceived by the subject. Vibration sensation was investigated using a 128 Hz diapason applied to the sternum, right and left radial sides of the wrist, and right and left outer malleoli. Two trials were performed at each place. A stopwatch recorded the vibration sensation duration. The two-point discrimination test was performed using a two-point discriminator. Head hair mercury concentration was significantly higher in mercury-exposed inhabitants of Tapajós than in non-exposed inhabitants of Tocantins (p basin is a possible but not a definitely proven cause for psychophysical somatosensory losses observed in their population. Additionally, the relatively simple psychophysical measures used in this work should be followed by more rigorous measures of the same population.

  11. Brasilochondria riograndensis gen. nov., sp. nov. (Copepoda, Chondracanthidae a parasite of flounders of Rio Grande do Sul State, Brazil

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    Vernon E. Thatcher

    2004-09-01

    Full Text Available Brasilochondria riograndensis gen. nov., sp. nov. (Copepoda, Chondracanthidae a parasite of the flounder, Paralichthys orbignyanus (Valenciennes, 1839, is described. The new genus has a spherical head a post-mandibular "neck" and two pairs of modified biramous legs. In these respects, it resembles Argentinochondria patagonensis Etchegoin, Timi & Sardella, 2003. In the Argentine genus, however, the bulbous head has a medial constriction and the posterior of the female lacks the lateral extensions that are present in the new genus. Pseudolernentoma brasiliensis Luque & Alves, 2003, also resembles the new genus but it lacks the lateral extensions of the trunk and the latter is cylindrical rather than flat. The second leg of the new genus is small and the endopod is shorter than the exopod. The other two genera have large second legs with subequal rami.Brasilochondria riograndensis gen. nov., sp. nov. (Copepoda, Chondracanthidae, um parasito do linguado, Paralichthys orbignyanus (Valenciennes, 1839, é descrito. O novo gênero tem uma cabeça esférica, um "pescoço" pós-mandíbular e dois pares de pernas que são birremes e modificados na fêmea. Nestes aspectos, ela parece com Argentinochondria patagonensis Etchegoin, Timi & Sardella, 2003. Nesta, no entanto, a cabeça é esférica com uma constrição medial e na parte posterior do tronco faltam as extensões póstero-laterais que o novo gênero possui. Pseudolernentoma brasiliensis Luque & Alves, 2003, é também parecido com o novo gênero, mas carece das extensões póstero-laterais e o mesmo tronco é cilíndrico em vez de achatado. A segunda perna no novo gênero é pequena e o endopodito é mais curto que o exopodito. Nos outros dois gêneros, as segundas pernas são grandes e os ramos são sub-iguais.

  12. Occurrences of gastrointestinal parasites in fecal samples from domestic dogs in São Paulo, SP, Brazil

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    Juliana Isabel Giuli da Silva Ferreira

    Full Text Available Abstract Occurrences of gastrointestinal parasites were assessed in fecal samples from 3,099 dogs in the metropolitan region of São Paulo, SP, that were treated at the Veterinary Hospital of the University of São Paulo Veterinary School. The samples were analyzed using the flotation and centrifugal sedimentation methods. The results were compared with those from previous studies (at different times. The frequency of each parasite was correlated with the dogs’ ages, breeds and gender, as well as the occurrences of diarrhea and the use of anthelmintics, by means of the chi-square or Fisher exact test. Partitioned chi-square tests were used to compare occurrences of each parasite and the times analyzed. Out of the total number of samples, 20.5% were positive and 16.1% (102/635 of these presented more than one genus of parasites. Ancylostoma spp. (7.1% and Giardia spp. (5.5% were the most frequent helminths and protozoa, respectively. Ancylostoma spp. was associated (p<0.05 with age (over one year, mixed breeds, sex (male and no use of anthelmintics. Dogs under one year and mixed breeds were associated with occurrences of Toxocara canis; and younger dogs with Giardia spp., Cryptosporidium spp. and Cystoisospora spp. Giardia spp. were also associated with dogs with a defined breed (p<0.05. All the parasites analyzed presented lower incidence in the last period analyzed than in the previous periods.

  13. Evaluation of landscape change in the Vidoca Stream Watershed, São José dos Campos, SP, Brazil

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    Ademir Fernando Morelli

    2007-12-01

    Full Text Available Hydrographic basins in urban areas frequently undergo drastic landscape changes. This work analyzed the landscape transformation of Vidoca Stream Watershed in the period from 1500 to 2003. Based on Remote Sensing and GIS techniques it was found that: a Between 1500 and 1953 natural vegetation classes which included Alluvial Semi-decidual Seasonal Forest, Mountainous Semi-decidual Seasonal Forest and Open Arboreal Savannah changed to anthropic fields and grasslands; b From 1954 to 1985, just before the massive urban occupation of the area, there was a short period of regeneration of the Alluvial Semi-decidual Seasonal Forest above the Carvalho Pinto Highway; later on, the grasslands changed to anthropic fields; c From 1986 to 1997, a fast urbanization process occurred and resulted in the replacement of the grassland and anthropic fields by urban constructions; d From 1998 to 2003, with the consolidation of the urbanization process, the urban occupation reached the boundaries of the plateau and the lowlands of the watershed, resulting in soil impermeabilization. The results of this research indicated that the urbanization process was not controlled in spite of restricted legislation and environmental degradation occurred in this studied watershed along of the study period.

  14. SEROLOGICAL DETECTION OF HEPATITIS A VIRUS IN FREE-RANGING NEOTROPICAL PRIMATES (Sapajus spp., Alouatta caraya) FROM THE PARANÁ RIVER BASIN, BRAZIL

    Science.gov (United States)

    SVOBODA, Walfrido Kühl; SOARES, Manoel do Carmo Pereira; ALVES, Max Moreira; ROCHA, Tatiana Carneiro; GOMES, Eliane Carneiro; MENONCIN, Fabiana; BATISTA, Paulo Mira; da SILVA, Lineu Roberto; HEADLEY, Selwyn Arlington; HILST, Carmen Lúcia Scortecci; AGUIAR, Lucas M.; LUDWIG, Gabriela; PASSOS, Fernando de Camargo; de SOUZA, Júlio Cesar; NAVARRO, Italmar Teodorico

    2016-01-01

    Nonhuman primates are considered as the natural hosts of Hepatitis A virus (HAV), as well as other pathogens, and can serve as natural sentinels to investigate epizootics and endemic diseases that are of public health importance. During this study, blood samples were collected from 112 Neotropical primates (NTPs) (Sapajus nigritus and S. cay, n = 75; Alouatta caraya, n = 37) trap-captured at the Paraná River basin, Brazil, located between the States of Paraná and Mato Grosso do Sul. Anti-HAV IgG antibodies were detected in 4.5% (5/112) of NTPs, specifically in 6.7% (5/75) of Sapajus spp. and 0% (0/37) of A. caraya. In addition, all samples were negative for the presence of IgM anti-HAV antibodies. These results suggest that free-ranging NTPs were exposed to HAV within the geographical regions evaluated. PMID:26910453

  15. SEROLOGICAL DETECTION OF HEPATITIS A VIRUS IN FREE-RANGING NEOTROPICAL PRIMATES (Sapajus spp., Alouatta caraya) FROM THE PARANÁ RIVER BASIN, BRAZIL.

    Science.gov (United States)

    Svoboda, Walfrido Kühl; Soares, Manoel do Carmo Pereira; Alves, Max Moreira; Rocha, Tatiana Carneiro; Gomes, Eliane Carneiro; Menoncin, Fabiana; Batista, Paulo Mira; Silva, Lineu Roberto da; Headley, Selwyn Arlington; Hilst, Carmen Lúcia Scortecci; Aguiar, Lucas M; Ludwig, Gabriela; Passos, Fernando de Camargo; Souza Jr, Júlio Cesar de; Navarro, Italmar Teodorico

    2016-01-01

    Nonhuman primates are considered as the natural hosts of Hepatitis A virus (HAV), as well as other pathogens, and can serve as natural sentinels to investigate epizootics and endemic diseases that are of public health importance. During this study, blood samples were collected from 112 Neotropical primates (NTPs) (Sapajus nigritus and S. cay, n = 75; Alouatta caraya, n = 37) trap-captured at the Paraná River basin, Brazil, located between the States of Paraná and Mato Grosso do Sul. Anti-HAV IgG antibodies were detected in 4.5% (5/112) of NTPs, specifically in 6.7% (5/75) of Sapajus spp. and 0% (0/37) of A. caraya. In addition, all samples were negative for the presence of IgM anti-HAV antibodies. These results suggest that free-ranging NTPs were exposed to HAV within the geographical regions evaluated.

  16. Infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the urbanizing Capibaribe River Basin - Brazil

    Science.gov (United States)

    Ribeiro Neto, A.; Scott, C. A.; Lima, E. A.; Montenegro, S. M. G. L.; Cirilo, J. A.

    2014-03-01

    Water availability for a range of human uses will increasingly be affected by climate change especially in the arid and semi-arid tropics. This paper aims to evaluate the ability of reservoirs and related infrastructure to meet targets for water supply in the Capibaribe River Basin (CRB), in the state of Pernambuco, Brazil. The basin has experienced spatial and sectoral (agriculture-urban) reconfiguration of water demands. Human settlements that were once dispersed, relying on intermittent sources of surface water, are now increasingly experiencing water-scarcity effects. As a result, rural populations in the CRB are concentrating around infrastructural water supplies in a socio-hydrological transition process that results from (a) hydroclimatic variability, (b) investment and assistance programs that may enhance but can also supplant local adaptive capacity, and (c) demographic trends driving urbanization of the state capital, Recife, which mirror urban growth across Brazil. In the CRB, demands are currently composed of 69.1% urban potable water, 14.3% industrial, 16.6% irrigation (with ecosystem-service demands met by residual flow). Based on the application of linked hydrologic and water-resources models using precipitation and temperature projections of the IPCC SRES A1B scenario, a reduction in rainfall of 31.8% translated to streamflow reduction of 67.4% under present reservoir operations rules. The increasing demand due to population was also taken into account. This would entail severe water supply reductions for human consumption (-45.3%) and irrigation (-78.0%) by the end of the 21st century. This study demonstrates the vulnerabilities of the infrastructure system during socio-hydrological transition in response to hydroclimatic and demand variabilities in the CRB and also indicates the differential spatial impacts and vulnerability of multiple uses of water to changes over time. The paper concludes with a discussion of the broader implications of climate

  17. Oil biodegradation by Bacillus strains isolated from the rock of an oil reservoir located in a deep-water production basin in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Duarte da Cunha, C.; Rosado, A.S.; Seldin, L.; Weid, I. von der [Universidade Federal do Rio de Janeiro (Brazil). Dept. de Microbiologia Geral; Sebastian, G.V. [CENPES, Petrobras, Ilha do Fundao, Rio de Janeiro (Brazil)

    2006-12-15

    Sixteen spore forming Gram-positive bacteria were isolated from the rock of an oil reservoir located in a deep-water production basin in Brazil. These strains were identified as belonging to the genus Bacillus using classical biochemical techniques and API 50CH kits, and their identity was confirmed by sequencing of part of the 16S rRNA gene. All strains were tested for oil degradation ability in microplates using Arabian Light and Marlin oils and only seven strains showed positive results in both kinds of oils. They were also able to grow in the presence of carbazole, n-hexadecane and polyalphaolefin (PAO), but not in toluene, as the only carbon sources. The production of key enzymes involved with aromatic hydrocarbons biodegradation process by Bacillus strains (catechol 1,2-dioxygenase and catechol 2,3-dioxygenase) was verified spectrophotometrically by detection of cis,cis-muconic acid and 2-hydroxymuconic semialdehyde, and results indicated that the ortho ring cleavage pathway is preferential. Furthermore, polymerase chain reaction (PCR) products were obtained when the DNA of seven Bacillus strains were screened for the presence of catabolic genes encoding alkane monooxygenase, catechol 1,2-dioxygenase, and/or catechol 2,3-dioxygenase. This is the first study on Bacillus strains isolated from an oil reservoir in Brazil. (orig.)

  18. Prevalence of intestinal parasitic infection in five farms in Holambra, São Paulo, Brazil Prevalência de enteroparasitoses em cinco fazendas de Holambra-SP, Brasil

    Directory of Open Access Journals (Sweden)

    Jun Kobayashi

    1995-02-01

    Full Text Available A parasitological survey was carried out on 222 inhabitants of five farms in Holambra, located 30 km north of Campinas, São Paulo, Brazil, on October 1992. Approximately 70% of the inhabitants were found to be infected with at least one species of intestinal parasite. The positive rates of 6 helminths and 7 protozoan species detected are as follows: 5.4% Ascaris lumbricoides; 8.6% Trichuris trichiura; 19.8% Necator americanus; 10.4% Strongyloides stercoralis; 14% Enterobius vermicularis; 0.9% Hymenolepis nana; 3.2% Entamoeba histolytica; 2.7% E. hartmanni; 9.9% E. coli; 14.0% Endolimax nana; 2.3% Iodamoeba butschlii; 10.4% Giardia lamblia; 37.8% Blastocystis hominis. The positive rates of helminth infection were generaly higher in the younger-group under 16 years-old than those in the elder group aged 16 or more, whereas the infection rates of protozoan species were higher in the elder group. The infection rate of Strongyloides was found to be 10.4% by a newly developed sensitive method (an agarplate culture methods.Uma pesquisa coproparasitológica foi realizada em 222 habitantes de cinco fazendas de Holambra, localizada a 30 km ao norte de Campinas, SP, Brasil, em outubro de 1992. Aproximadamente 70% dos habitantes apresentaram pelo menos um tipo de parasitose intestinal. O índice de positividade das 6 espécies de helmintos e de 7 protozoários na população foi o seguinte: Ascaris lumbricoides (5,4%; Trichuris trichiura (8,6%; Necator americanus (19,8%; Strongyloides stercoralis (10,4%; Enterobius vermiculares (1,4%; Hymenolepis nana (0,9%; Entamoeba histolytica (3,2%; E. hartmanni (2,7%; E. coli (9,9%; Endolimax nana (14,0%; Iodamoeba butschlii (2,3%; Giardia lamblia (10,4%; Blastocystis hominis (37,4%. O índice de positividade para infecção por helmitos foi aparentemente maior na população mais jovem (menores de 16 anos do que no grupo de população com idades acima de 16 anos, ao contrário do índice de infecção pelos protozo

  19. Petroleum Geologic Characteristics of Sao Francisco Basin, Brazil%巴西圣弗朗西斯科盆地石油地质特征

    Institute of Scientific and Technical Information of China (English)

    庞正炼; 樊太亮; 何辉; 王进财; 林琳

    2012-01-01

    Both basic and petroleum geology characteristics of Sao Francisco Basin, Brazil are studied and analyzed systematically with basin resource evaluation. According to the research, the basin possesses a long and complicated tectonic evolution history. It underwent the stages of lift, passive continental margin, and foreland in turn. Each stage left its feature in the basin. Three main sequences are formed in the basin: Espinhaco Croup, Macaubas Group and Bambui Croup. In the basin, effective source rock, favorable reservoir and regional caprock all develope in the Bambui Croup and Macaubas Croup. Meanwhile, the source-reservoir-cap assemblage in the basin is favorable, and the effective traps are plenteous, including structural traps, stratigraphic traps, and structural -stratigraphic traps. Through the research of accumulation, regional unconformity and fractures formed during Brasilia Orogeny are defined as the migration pathway, which facilitated the accumulation of hydrocarbon in different traps. Moreover, compared with the same kind of basins in the world, the result shows the Sao Francisco Basin possesses favorable petroleum potential.%运用盆地资源评价方法对巴西圣弗朗西斯科盆地的地质背景和石油地质特征进行了系统的分析和研究.结果表明,圣弗朗西斯科盆地形成年代久远,构造演化史复杂,先后经历了断陷期、被动大陆边缘沉积期和前陆沉积期3个构造演化阶段,各阶段的盆地特征存在差异,发育Espinhaco群、Macaubas群以及Bambui群3套主要的充填序列.盆地中有效烃源岩、有利储层和区域盖层均发育于Bambui群和Macaubas群,生储盖配置关系良好.盆内圈闭发育,包括构造圈闭、地层圈闭及构造-地层复合圈闭等多种类型.通过成藏特征分析,认为盆地中的区域不整合面和巴西利亚构造运动所形成的断层和裂缝为油气的运移提供了通道,为油气在不同类型圈闭中的聚集创造了条件.综

  20. Uncovering spatial patterns in the natural and human history of Brazil nut (Bertholletia excelsa) across the Amazon Basin

    NARCIS (Netherlands)

    E. Thomas; C. Alcázar Caicedo; C.H. McMichael; R. Corvera; J. Loo

    2015-01-01

    Aim Our goal was to test the hypothesis that ancient humans substantially contributed to shaping the current distribution of Brazil nut (Bertholletia excelsa), an Amazonian tree species that has been important for human livelihoods since pre-Columbian times. We scrutinized the putative association b

  1. Litter fall production and decomposition in a fragment of secondary Atlantic Forest of São Paulo, sp, southeastern Brazil

    Directory of Open Access Journals (Sweden)

    Maurício Lamano Ferreira

    2014-08-01

    Full Text Available Litter fall consists of all organic material deposited on the forest floor, being of extremely important for the structure and maintenance of the ecosystem through nutrient cycling. This study aimed to evaluate the production and decomposition of litter fall in a secondary Atlantic forest fragment of secondary Atlantic Forest, at the Guarapiranga Ecological Park, in São Paulo, SP. The litter samples were taken monthly from May 2012 to May 2013. To assess the contribution of litter fall forty collectors were installed randomly within an area of 0.5 ha. The collected material was sent to the laboratory to be dried at 65 °C for 72 hours, being subsequently separated into fractions of leaves, twigs, reproductive parts and miscellaneous, and weighed to obtain the dry biomass. Litterbags were placed and tied close to the collectors to estimate the decomposition rate in order to evaluate the loss of dry biomass at 30, 60, 90, 120 and 150 days. After collection, the material was sent to the laboratory to be dried and weighed again. Total litter fall throughout the year reached 5.7 Mg.ha-1.yr-1 and the major amount of the material was collected from September till March. Leaves had the major contribution for total litter fall (72%, followed by twigs (14%, reproductive parts (11% and miscellaneous (3%. Reproductive parts had a peak during the wet season. Positive correlation was observed between total litter and precipitation, temperature and radiation (r = 0.66, p<0.05; r = 0.76, p<0.05; r = 0.58, p<0.05, respectively. The multiple regression showed that precipitation and radiation contributed significantly to litter fall production. Decomposition rate was in the interval expected for secondary tropical forest and was correlated to rainfall. It was concluded that this fragment of secondary forest showed a seasonality effect driven mainly by precipitation and radiation, both important components of foliage renewal for the plant community and that

  2. Gravity flow deposits of the Maceio Formation - Alagoas Basin, NE of Brazil; Depositos de fluxos gravitacionais da Formacao Maceio - Bacia de Alagoas, NE do Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Arienti, Luci Maria [PETROBRAS, Rio de Janeiro, RJ (Brazil). Centro de Pesquisas (CENPES). Gerencia de Sedimentologia e Petrologia]. E-mail: arienti@petrobras.com.br

    2006-05-15

    This work deals with the Aptian rift section of Maceio Formation (Albian), Alagoas Basin, Northeast of Brazil, using data from outcrops and wells (Tabuleiro dos Martins Field). Studies of facies, process, depositional systems, facies tract and sequences were performed to characterize hyperpicnal turbidities; of which sediments were directly input by catastrophic river floods. Sequence stratigraphy concepts can be used for rift-section analysis, considering the concept of - climate systems tracts - and the result is an excellent correlation between deposit types and climate conditions. Transgressive system tracts (TTS) related to humid periods represent phases of high siliciclastic input into the basin, resulting on sandstone turbidity sequences, typically enriched by continental organic matter. In contrast, later high stand system tracts (LHST), corresponding to arid conditions, are dominated by muddy lacustrine deposits, enriched by algalic organic matter and showing mud cracks. Locally, low stand system tracts (LST) dominated by evaporites are found in restricted areas. Climate and tectonics were the main controlling factors of the architecture and frequency of the sequences. This study showed that an integrated approach, using outcrops and subsurface data, is a powerful tool to understand facies and depositional process, sequences and their stacking pattern on continental- rift deposits. (author)

  3. Estimation of evapotranspiration for different land covers in a Brazilian semi-arid region: A case study of the Brígida River basin, Brazil

    Science.gov (United States)

    Santos, Celso Augusto Guimarães; Silva, Richarde Marques da; Silva, Alexandro Medeiros; Brasil Neto, Reginaldo Moura

    2017-03-01

    In this study, the Surface Energy Balance Algorithm for Land (SEBAL) was used to compute the surface albedo, vegetation indices (NDVI, SAVI and LAI), surface temperature, soil heat flux and evapotranspiration (ET) over two contrasting years (dry and wet) in the Brígida River basin, a semi-arid region of north-eastern Brazil. The actual ET was computed during satellite overpass and was integrated for 24 h on a pixel-by-pixel basis for the daily ET distribution. Due to the topographic effects, an attempt was also made to incorporate DEM information to estimate the net radiation. The land cover types identified in the watershed are cropland, bare land, dense canopy, grassland, and caatinga vegetation. In order to study the variation among the biophysical parameters and ET, two-way analysis of variance (ANOVA) was used. The ET calculated by SEBAL ranged between 2.46 and 6.87 mm/day for the dry year (1990) and 1.31 and 6.84 mm/day for the wet year (2009) for the river basin. The results showed that a reduction in vegetation cover is evident in the temporal and spatial analysis over the studied periods in the region and that these facts influence the values of the energy balance and ET. The results showed significant differences in the variables of land cover type and year at the probability level of 0.05 for all land cover types.

  4. Land cover and climate change effects on streamflow and sediment yield: a case study of Tapacurá River basin, Brazil

    Science.gov (United States)

    Santos, J. Y. G.; Silva, R. M.; Carvalho Neto, J. G.; Montenegro, S. M. G. L.; Santos, C. A. G.; Silva, A. M.

    2015-06-01

    This study assesses the impact of the land use and climate changes between 1967-2008 on the streamflow and sediment yield in Tapacurá River basin (Brazil) using the Soil and Water Assessment Tool (SWAT) model. The model was calibrated and validated by comparing simulated mean monthly streamflow with observed long-term mean monthly streamflow. The obtained R2 and Nash-Sutcliffe efficiency values to streamflow data were respectively 0.82 and 0.71 for 1967-1974, and 0.84 and 0.82 for 1995-2008. The results show that the land cover and climate change affected the basin hydrology, decreasing the streamflow and sediment yield (227.39 mm and 18.21 t ha-1 yr-1 for 1967-1974 and 182.86 mm and 7.67 t ha-1 yr-1 for 1995-2008). The process changes are arising mainly due to the land cover/use variability, but, mainly due to the decreasing in the rainfall rates during 1995-2008 when compared with the first period analysed, which in turn decreased the streamflow and sediments during the wet seasons and reduced the base flow during the dry seasons.

  5. A new species of Lycengraulis Günther, 1868 (Clupeiformes: Engraulinae) from the Amazon basin, Brazil, with comments on Lycengraulis batesii (Günther, 1868).

    Science.gov (United States)

    Loeb, Marina Vianna; Alcântara, Ayda Vera

    2013-01-01

    A new species of Lycengraulis from the Amazon basin is described. Lycengraulis figueiredoi can be distinguished from L. grossidens by a short upper maxilla, its posterior margin not reaching the lower maxilla joint (vs. upper maxilla longer, its posterior margin reaching to or a little past of mandible joint). Lycengraulis figueiredoi can be distinguished also from L. poeyi by 26 to 31 anal-fin rays (vs. 21 to 23 anal-fin rays) and by 44 to 46 vertebrae (vs. 42 vertebrae), and from L. batesii by having the anal-fin origin at vertical through base of second to fifth dorsal-fin ray (vs. anal-fin origin at vertical through base of sixth to 10th dorsal-fin ray) and by 17-21 gill rakers on the lower branch of first gill arch (vs. 12-15 gill rakers on the lower branch of first gill arch). The new species occurs in the rio Purus, Negro, Trombetas and Solimões, in the Amazon basin, Brazil.

  6. Quality control studies of {sup 99}Mo used in {sup 99}Mo/{sup 99m}Tc generators produced at IPEN/CNEN-SP, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Said, Daphne S.; Brambilla, Tania P.; Matsuda, Margareth M.N.; Osso Junior, Joao A., E-mail: daphnesaid@usp.br, E-mail: taniabrambilla@yahoo.com.br, E-mail: mmatsuda@ipen.br, E-mail: jaosso@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN/CNEN-SP), Sao Paulo, SP (Brazil)

    2015-07-01

    {sup 99m}Tc is the most used radionuclide in nuclear medicine. In Brazil, the {sup 99}Mo/{sup 99m}Tc generators are produced exclusively by the Center of Radiopharmacy at IPEN-CNEN/SP, by importing {sup 99}Mo from different suppliers. {sup 99}Mo (t{sub 1/2} = 66 h) is a fission product of {sup 235}U, therefore, it can be accompanied by several radioisotopes that are highly prejudicial for human health, demanding a strict quality control of this product for generators safe use. The European Pharmacopoeia established some parameters and limits that evaluate the quality of the solution of sodium [{sup 99}Mo]molybdate, that is used as raw material for generator's production. The European Pharmacopoeia also recommends some analytical methods to perform these evaluations, however, it has been observed difficulties on the implementation of these methods by the generator's producers. These difficulties are probably related to the lack of practicability of the proposed methods and the extensive list of utilized reagents. In this work some procedures of the European Pharmacopoeia's quality control method for {sup 99}Mo were evaluated. Different types of solid phase exchanger cartridges were tested for retention of {sup 99}Mo in 3 different conditions. Cartridges that presented percentages of retention higher than 90% were also tested for separation of {sup 99}Mo from possible contaminants (Ru e Te). The results shown that solid phase exchanger cartridges that presented percentages of retention of Mo higher than 90% also presented significant percentages of retention of Ru and Te. An alternative method for separation of {sup 99}Mo from {sup 131}I (other contaminant) are also proposed. (author)

  7. Calibration of hydrodynamic model MIKE 11 for the sub-basin of the Piauitinga river, Sergipe, Brazil

    Directory of Open Access Journals (Sweden)

    Marcos Vinicius Folegatti

    2010-12-01

    Full Text Available In Piauitinga river sub-basin the environment has been suffering from negative actions by humans such as deforestation around springs, inadequate use of the uptaken water, inappropriate use in domestic activities, siltation and sand exploitation, and contamination by domestic, industrial and agricultural residuals. The present study presents the one-dimensional hydrodynamic MIKE 11 model calibration that simulates the water flow in estuary, rivers, irrigation systems, channels and other water bodies. The aim of this work was to fit the MIKE 11 model to available discharge data for this sub-basin. Data from the period of 1994 to 1995 were used for calibration and data from 1996 to 2006 for validation, except the 1997 year, from which data were not available. Manning’s roughness coefficient was the main parameter used for the Piauitinga river sub-basin discharge calibration and other parameters were heat balance, water stratification and groundwater leakage. Results showed that the model had an excellent performance for the Piauitinga basin and had an efficiency coefficient of 0.9 for both periods. This demonstrates that this model can be used to estimate the water quantity in Piauitinga river sub-basin.

  8. New or rare frogs from the Coastal Ranges of Brazil: eleutherodactylus venancioi n.sp., E. hoehnei n.sp. Holoaden bradei n.sp. e H. lüderwaldti Mir. Rib., 1920 Anfíbios novos e raros das Serras Costeiras do Brasil: eleutherodactylus venancioi n.sp., E. hoehnei n.sp. Holoaden bradei n.sp. e H. lüderwaldti Mir. Rib., 1920

    Directory of Open Access Journals (Sweden)

    Bertha Lutz

    1958-12-01

    Full Text Available Field-work in the sierras near the sea-board of south-eastern Brazil continues to yield new or rare frogs. Four more of these forms are presented here. Two of them, both new, are put into the genus Eleutherodactylus, to which they belong by their general habitat, morphology, and also by the osteological characters. They differs from the known regional species of this genus only by the wider and shorter disks of some of the digits and the more lanceolate build. The other two species belong to the very little known genus Holoaden, established by MIRANDA RIBEIRO in 1920. One of them is his type-species, H. lüderwaldti, which continues to be very rare. The other, H. bradei, is new. It seems endemic to the Upper Itatiaia and is very plentiful there.O trabalho de campo nas serras vizinhas do nosso litoral continua a render anfíbios novos e raros. Aos já versados em publicações anteriores, acrescentamos as quatro espécies que formam o assunto so presente trabalho. Duas delas, ambas novas, pertencem ao gênero Eleutherodactylus, não só pelo seu hábitat e sua morfologia como também pelos caracteres osteológicos, verificados em exemplares diafanisados pelo meu ilustre colega Sr. ANTENOR LEITÂO DE CARVALHO e estudados por ambos os herpetólogos do Museu Nacional. Diferem das outras espécies do gênero pertencentes á fauna regional apenas pelo porte lanceolado e esgio e pelos discos mais curtos e mais largos de alguns dos dedos. As fêmeas da espéciemenor continham um certo número de ovos macrolecitais, característicos do gênero, cujo desenvolvimento é embrionário, sem fase larval. É interessante notar que, em duas delas, só os ovários direitos eram perceptíveis externamente. As outras duas espécies aqui versadas se filiam ao gênero Holoaden criado, em 1920, pelo nosso eminente predecessor, Professor ALIPIO DE MIRANDA RIBEIRO. Trata-se do genótipo, H. lüderwaldti, que continua a ser raríssimo, e de H. bradei nov. sp., que

  9. Facies and depositional model of Almada Canyon, Almada Basin, Bahia, Brazil; Facies e modelo deposicional do Canyon de Almada, Bacia de Almada, Bahia

    Energy Technology Data Exchange (ETDEWEB)

    D' Avila, Roberto Salvador Francisco; Souza Cruz, Carlos Emanoel de; Oliveira Filho, Jose Souto; Jesus, Candida Menezes de; Cesero, Pedro de; Dias Filho, Dorval Carvalho; Lima, Claudio Coelho de; Queiroz, Claudia Lima de; Santos, Saulo Ferreira; Ferreira, Eduardo Araripe [PETROBRAS, Santos, SP (Brazil). Unidade de Negocio de Exploracao]. E-mail: rdavila@petrobras.com.br

    2004-11-01

    In the continental portion of the Almada Basin outcrops of canyon filling deposits are represented by turbidite channels and associated facies from Urucutuca Formation. The canyon - semi-exhumated - eroded basement and pre-Cenomanian sedimentary rocks. The field study of the outcrops and cores obtained in adjacent perforations lead to the understanding of the facies and processes that controlled the deposition of these channeled turbidite that can be compared to the reservoirs of many oil fields in Brazil. The Almada canyon is a submarine conduct of tectonic origin that was enlarged by the repeated passing of turbidity currents. During the rift phase and the Albian period, compressive events reactivated old N E and N W faults in the basement as trans current fault systems. The continuation of these stresses, from the Cenomanian to the Maastrichtian, developed normal faults that controlled a submarine canyon that connected the continent, where an estuary was formed between the mountains, to the deep marine region of the basin. The canyon has received sediments brought by catastrophic fluvial floods coming from the surrounding mountains, which formed hyperpicnal flows that have evolved as turbidity currents, thus causing erosion of the substrate and carrying a huge volume of sediments to the basin. A part of that load was deposited in the canyon and formed turbidite channels filled by conglomerates, sandstones and shales. These moderately to highly efficient turbidite are intercalated to pro delta pelites and low density turbid plumes deposits, which have mostly been re mobilized as slump and debris flows (chaotic deposits). Pelites were accumulated mainly in the normal fluvial sedimentation phases, when the sandy sediment was retained next to the canyon head and were reworked by the tides on the upper part of the estuary. (author)

  10. Soil and water losses in eucalyptus plantation and natural forest and determination of the USLE factors at a pilot sub-basin in Rio Grande do Sul, Brazil

    Directory of Open Access Journals (Sweden)

    Bárbara Pereira Christofaro Silva

    Full Text Available ABSTRACT Monitoring water erosion and the factors that control soil and water loss are essential for soil conservation planning. The objective of this study was to evaluate soil and water losses by water erosion under natural rainfall in eucalyptus plantations established in 2001 (EF2, and 2004 (EF1, native forest (NF and bare soil (BS, during the period of 2007 to 2012; and to determine the USLE factors: rain erosivity (R, erodibility (K of a Red Argisol and the cover-management factor (C for EF1, EF2 and NF at a pilot sub-basin, in Eldorado do Sul, RS, Brazil. The R factor was estimated by the EI30 index, using rainfall data from a gauging station located at the sub-basin. The soil and water losses were monitored in erosion plots, providing consistent data for the estimation of the K and C factors. The sub-basin presented an average erosivity of 4,228.52 MJ mm ha-1 h-1 yr-1. The average annual soil losses em EF1 and EF2 (0.81 e 0.12 Mg ha-1 year-1, respectively were below of the limit of tolerance, 12.9 Mg ha-1 year-1. The percentage values of water loss relating to the total rainfall decreased annually, approaching the values observed at the NF. From the 5th year on after the implantation of the eucalyptus systems, soil losses values were similar to the ones from NF. The erodibility of the Red Argisol was of 0.0026 Mg ha h ha-1 MJ-1mm-1 and the C factor presented values of 0.121, 0.016 and 0.015 for EF1, EF2 and NF, respectively.

  11. Description of a new catfish genus (Siluriformes, Loricariidae) from the Tocantins River basin in central Brazil, with comments on the historical zoogeography of the new taxon

    Science.gov (United States)

    Silva, Gabriel S. C.; Roxo, Fábio F.; Ochoa, Luz E.; Oliveira, Claudio

    2016-01-01

    Abstract This study presents the description of a new genus of the catfish subfamily Neoplecostominae from the Tocantins River basin. It can be distinguished from other neoplecostomine genera by the presence of (1) three hypertrophied bicuspid odontodes on the lateral portion of the body (character apparently present in mature males); (2) a large area without odontodes around the snout; (3) a post-dorsal ridge on the caudal peduncle; (4) a straight tooth series in the dentary and premaxillary rows; (5) the absence of abdominal plates; (6) a conspicuous series of enlarged papillae just posterior to the dentary teeth; and (7) caudal peduncle ellipsoid in cross section. We used maximum likelihood and Bayesian methods to estimate a time-calibrated tree with the published data on 116 loricariid species using one nuclear and three mitochondrial genes, and we used parametric biogeographic analyses (DEC and DECj models) to estimate ancestral geographic ranges and to infer the colonization routes of the new genus and the other neoplecostomines in the Tocantins River and the hydrographic systems of southeastern Brazil. Our phylogenetic results indicate that the new genus and species is a sister taxon of all the other members of the Neoplecostominae, originating during the Eocene at 47.5 Mya (32.7–64.5 Mya 95% HPD). The present distribution of the new genus and other neoplecostomines may be the result of a historical connection between the drainage basins of the Paraguay and Paraná rivers and the Amazon basin, mainly through headwater captures. PMID:27408594

  12. Verification of inflow into hydropower reservoirs using ensemble forecasts of the TIGGE database for large scale basins in Brazil

    Directory of Open Access Journals (Sweden)

    Fernando Mainardi Fan

    2015-09-01

    New hydrological insights for the region: This work presents one of the first extensive efforts to evaluate ensemble forecasts for large-scale basins in South America using TIGGE archive data. Results from these scenarios provide validation criteria and confirm that ensemble forecasts depend on the particular EPS used to run the hydrological model and on the basin studied. Furthermore, the use of the Super Ensemble seems to be a good strategy in terms of performance and robustness. The importance of the TIGGE database is also highlighted.

  13. Heavy metal contamination in Phrynops geoffroanus (Schweigger, 1812) (Testudines: Chelidae) in a River Basin, São Paulo, Brazil.

    Science.gov (United States)

    Piña, C I; Lance, V A; Ferronato, B O; Guardia, I; Marques, T S; Verdade, L M

    2009-12-01

    The Piracicaba River basin is considered the most disturbed river basin in the state of São Paulo. Considerable amounts of agricultural residues are seasonally drained into the river, and the region is also highly urbanized and industrialized with an incipient sewage treatment system. The presence of heavy metals has been previously reported for the water and riverbed in Piracicaba river basin. In this study we evaluated 13 heavy metals in the blood of 37 Geoffroy's side-necked turtles, Phrynops geoffroanus, from Piracicaba River and Piracicamirim Creek, one of its tributaries. Blood levels of As, Co, Cr, Se and Pb varied among sites, whereas Sn varied between males and females. However, no obvious pathology was detected. Serum level of Cu (2,194 ng g(-1)) and Pb (1,150 ng g(-1)) found in this study are the highest ever described for any reptile; however, no clinical symptoms have been detected in the present study. There is no information about the time scale of such contamination, which could be currently subclinical and yet lead to a breakdown in the population reproductive success in a few years. Based on the present study, legal enforcement is urged in order to locate and extirpate heavy metal sources in the Piracicaba River basin. In addition, monitoring should include humans and commercial fish consumed in local markets.

  14. Geração do deflúvio de uma microbacia com Mata Atlântica, Cunha, SP. Runoff generation in a small catchment with Atlantic Rainforest, Cunha, SP, Brazil.

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    Maurício RANZINI

    2011-12-01

    Full Text Available Este trabalho teve como escopo estudar a resposta do deflúvio a eventos deprecipitação de uma microbacia experimental (37,5 ha com Mata Atlântica, localizadano Laboratório de Hidrologia Florestal Walter Emmerich, no Parque Estadual da Serrado Mar – Núcleo Cunha, SP. O escoamento direto foi de 8,3% da precipitação anual.A resposta do deflúvio à precipitação mostrou uma variabilidade de hidrogramas,que dependeu da magnitude da precipitação e das condições de umidade antecedente do solo.De um modo geral, os hidrogramas tenderam grosseiramente a reproduzir a precipitação(hietograma. Foram identificados dois grupos de hidrogramas de acordo com a relação entre aprecipitação e o pico de vazão. No primeiro, a contribuição do escoamento de base foi pequena,com o escoamento direto dominando o hidrograma e a área variável de afluência (A.V.A..No segundo grupo, um acréscimo na precipitação produziu um aumento no pico de vazãomesmo durante as chuvas mais intensas, sugerindo que a A.V.A. ocupou uma menor parte damicrobacia, próxima ao curso d’água. Esses resultados indicaram que a umidade antecedentedo solo foi importante para a resposta do deflúvio à precipitação.This paper studied the response of runoff to rainstorm events of a smallexperimental catchment (37.5 ha with Atlantic Rainforest. The Forest HydrologicalLaboratory, at Cunha, is located in the Serra do Mar State Park, SE Brazil. The total volume ofstormflow is 8.3% of annual rainfall. The response of runoff to rainfall showed a variability ofthe hydrographs, which depended on intensity of the precipitation and soil humidity conditionsbefore the flood. In general, the hydrographs tended to roughly reproduce the shape of therainstorm. It was identified two groups of hydrographs, separated according to the quotientbetween rainfall and peak flow. At first, the contribution of base flow was low, with the directrunoff hydrograph dominating and the variable source

  15. Comportamento de 16 porta-enxertos para o tangor Murcott na região de Itirapina-SP Behavior of sixteen rootstocks for Murcott in Itirapina, SP, Brazil

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    José Orlando de Figueiredo

    2006-04-01

    Full Text Available Foi monitorado o comportamento de 16 porta-enxertos para o tangor Murcott [Citrus reticulata Blanco x C. sinensis (L. Osbeck], do clone nucelar J, em experimento instalado em 1990, na Fazenda Raio de Sol, Itirapina-SP. Os porta-enxertos foram: tangelo 'Orlando' (C. reticulata Blanco x C. paradisi Macf., laranja 'Caipira DAC' [C. sinensis (L. Osbeck], limão 'Cravo'(C. limonia Osbeck, os trifoliatas 'Kryder 8-5'e 'EEL'[Poncirus trifoliata (L. Raf.] e as tangerinas 'Cleópatra' (C. reshni hort. ex. Tanaka, 'Sunki' [C. sunki (Hayata hort. ex. Tanaka], 'Batangas', 'Oneco', 'Swatow', 'Szinkon', 'Satsuma', 'Cravo', 'Dancy', 'Suen Kat' e 'Pook Ling Ming' (C. reticulata Blanco. As produções foram avaliadas de 1996 a 2003 e as maiores médias foram proporcionadas pelas plantas enxertadas nas tangerinas 'Cleópatra', 'Suen Kat', 'Pook Ling Ming' e 'Sunki' (>40 kg planta-1. Dentre os porta-enxetos que induziram as mais baixas produções, estão os dois trifoliatas, a 'Caipira DAC' e a tangerina 'Cravo' (Sixteen rootstocks were compared in a trial started in 1990, for Murcott tangor, nucellar clone "J", in Itirapina, Brazil. The rootstocks tested were Orlando tangelo (Citrus reticulata Blanco x C. paradisi Macf., sweet orange [C. sinensis (L. Osbeck] cv. Caipira DAC, Rangpur lime (C. limonia Osbeck, Poncirus trifoliata (L. Raf. cv. Kryder 8-5, P. trifoliata (L. Raf. cv. EEL and the mandarins Cleopatra (C. reshni hort. ex. Tanaka, Sunki [C. sunki (Hayata hort. ex. Tanaka] and Batangas, Oneco, Swatow, Szinkon, Satsuma, Cravo, Dancy, Suen Kat and Pook Ling Ming (C. reticulata Blanco. Fruit yield was measured per plant, in a period of seven years (1996-2003. The best yielding rootstocks were Cleopatra, Suen Kat, Pook Ling Ming and Sunki mandarins (> 40 kg tree-1. The two Trifoliate, sweet orange cv. Caipira DAC and Cravo mandarin presented the lowest yields (< 25 kg tree-1. No significant variation was observed for fruit quality characteristics of trees on

  16. Circuitos de uso de crack na região central da cidade de São Paulo (SP, Brasil Crack usage circuits in the downtown area of the city of São Paulo (SP, Brazil

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    Luciane Raupp

    2011-05-01

    Full Text Available Apesar de o uso de drogas ser uma prática presente desde os primórdios da humanidade, atualmente o seu abuso adquiriu dimensões preocupantes, configurando-se como um problema de saúde pública. O surgimento do crack, droga derivada da pasta de coca, agravou esse quadro ao aumentar os danos sociais e à saúde dos usuários. Visando conhecer o impacto de sua inserção no cotidiano dos usuários, foi realizado um estudo etnográfico em locais de venda e uso de crack na região central da cidade de São Paulo (SP, Brasil. Foi utilizado um diário de campo para registrar as observações e os diálogos informais efetuados com as pessoas que circulavam no local estudado. Os resultados apontaram os circuitos percorridos pelos usuários, suas dinâmicas e as relações que estabelecem com outros atores sociais, as quais são permeadas por permanente tensão, envolvendo a prática de atos violentos nos quais os usuários são tanto agressores quanto vítimas. O estudo também sugere a importância de outros fatores como a história da região pesquisada, as políticas públicas, questões econômicas e ausência de investimentos sociais e em saúde pública. Sugere-se que o alto grau de degradação da região pesquisada não seria consequência apenas das pessoas e atividades exercidas no local, mas principalmente do processo urbano que gerou tal quadro social.Although drug usage has been prevalent since the dawn of humankind, drug abuse has currently escalated alarmingly and can be characterized as a public health problem. The spread of "crack," a drug derived from cocaine paste, is worsening the situation by aggravating the social damages and harming the health of users. An ethnographic study was conducted in downtown São Paulo, SP (Brazil in locations where crack is sold and used in order to establish the impact of the spread of this drug in the daily life of users. A field diary was used to record the observations and informal dialogues with

  17. Monitoring the Genotoxic and Cytotoxic Potential and the Presence of Pesticides and Hydrocarbons in Water of the Sinos River Basin, Southern Brazil.

    Science.gov (United States)

    Bianchi, Eloisa; Lessing, Gustavo; Brina, Karisa Roxo; Angeli, Larissa; Andriguetti, Natália Bordin; Peruzzo, Jaqueline Regina Soares; do Nascimento, Carlos Augusto; Spilki, Fernando Rosado; Ziulkoski, Ana Luiza; da Silva, Luciano Basso

    2017-04-01

    The Sinos River is one of the most polluted rivers in Brazil. The purpose of this work was to monitor the presence of some pesticides and hydrocarbons as well as the genotoxic and cytotoxic potential on HEp-2 cells from water samples collected at seven sites in the Sinos River Basin (SRB), southern Brazil. Nine samples were taken from the three main rivers in the SRB and used as a solution to dilute the HEp-2 cell culture medium after microfiltration. Twenty-four pesticides and 19 hydrocarbons were measured. Cytotoxicity was assessed by methyl thiazolyl tetrazolium (MTT) and neutral red (NR) assays, in which cells were exposed to different concentrations of the water samples for 24 h. Genotoxicity of the microfiltrated raw water samples was assessed by comet assay after 6 and 24 h of exposure. Among the chemicals analyzed, only the 2,4-D, dichloromethane, tetrachloroethene, chloroform, bromodichloromethane, styrene, and toluene were detected, but they were all lower than the limit established by Brazilian regulations. Twenty samples from a total of 60 had a cytotoxic effect in the MTT assay and 30 in the NR assay. The comet assay indicated the presence of genotoxic substances in the water at the seven locations monitored. Temporal and spatial variation was observed in the cytotoxicity and genotoxicity assays. Results indicated that the water in all stretches of the SRB is contaminated and it can cause harmful effects to humans and to the aquatic biota. This HEp-2 cell-line approach can be an additional tool for environmental monitoring.

  18. Tectonic-stratigraphic evolution of Espirito Santo Basin - Brazil; Evolucao tectono-estratigrafica da Bacia do Espirito Santo

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Eric Zagotto; Fernandes, Flavio L.; Lobato, Gustavo; Ferreira Neto, Walter Dias [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Coordenacao dos Programas de Pos-graduacao de Engenharia (COPPE). Lab. de Modelagem de Bacias (LAB2M); Petersohn, Eliane [Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP), Brasilia, DF (Brazil)

    2008-07-01

    This paper documents the analysis of seismic data of the Espirito Santo basin obtained during the project realized through partnership between COPPE/UFRJ/Lab2M with the Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (ANP) during 2006 and 2007. The major objective of the seismic data interpretation in the project was to define the main structural and stratigraphic features in order to build a sedimentation model and a tectonic-stratigraphic evolution model of the Espirito Santo basin. Thus, the sedimentary package has been divided into eight genetic units (UN), grouped into five third order stratigraphic sequences, namely: UN-B, represented by siliciclastics rocks of the rift stage and evaporitic sag-rift stage, deposited during the Aptian; UN-C, which represents the carbonatic rocks deposited in a marine environment, and siliciclastics rocks located in the proximal portions during the Albian; and UN-D, represented by sediments, composed mainly by pelites, deposited in between the Cenomanian and Recent, and includes the Eocene volcanic event, which one changed the sedimentation pattern of the basin. (author)

  19. Phylogenetic signal and major ecological shifts in the ecomorphological structure of stream fish in two river basins in Brazil

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    Camilo Andrés Roa-Fuentes

    Full Text Available We tested the contribution of the phylogenetic and specific components to the ecomorphological structure of stream fish from the upper Paraguai River and upper São Francisco River basins, and identified nodes in the phylogenetic tree at which major ecological shifts occurred. Fish were sampled between June and October of 2008 in 12 streams (six in each basin. In total, 22 species from the upper Paraguai River basin and 12 from the upper São Francisco River were analyzed. The ecomorphological patterns exhibited phylogenetic signal, indicating that the ecomorphological similarity among species is associated with the degree of relatedness. A strong habitat template is most likely to be the primary cause for a high phylogenetic signal. A significant contribution from the specific component was also detected, supporting the idea that the phylogenetic signal occurs in some clades for some traits, but not in others. The major ecological shifts were observed in the basal nodes, suggesting that ecological niche differences appear to accumulate early in the evolutionary history of major clades. This finding reinforces the role of key traits in the diversification of Neotropical fishes. Ecological shifts in recent groups could be related to morphological modifications associated with habitat use.

  20. Solos e vegetação nativa remanescente no Município de Campinas Soil and native vegetation remnant in Campinas, SP, Brazil

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    Ivan Carlos de Moraes Ferreira

    2007-09-01

    Full Text Available O objetivo deste trabalho foi identificar atributos e classes de solos associados à ocorrência de remanescentes de cerrado e de floresta nativa em Campinas, SP, e identificar espécies indicadoras desses ambientes. Vinte e sete fragmentos de vegetação nativa foram estudados. Foi realizada a caracterização morfológica, classificação e coleta do solo para análises, bem como o levantamento florístico-fitossociológico do estrato arbóreo. A análise de correspondência canônica identificou as variáveis mais bem correlacionadas com a distribuição das espécies e identificou 15 variáveis que explicaram 31% da variância nos dois primeiros eixos. A classificação dos solos discriminou as fitofisionomias estudadas, Argissolos associados às matas e Latossolos aos cerrados, indício de que baixa fertilidade, baixa retenção de água e drenagem acentuada do solo favorecem o estabelecimento de cerrado. Parâmetro "n" da curva de retenção de água, densidade, H+Al, Ca, Al, K e Mg trocáveis, macroporos e matéria orgânica do solo foram os atributos dos solos mais efetivos nessa diferenciação fitofisionômica. A barreira química imposta pelo excesso de Al e deficiência de Ca no horizonte B e a baixa retenção de água nos solos sob cerrado favorecem as espécies Luehea grandiflora, Persea willdenovii, Xylopia aromatica e Erythroxylum daphnites, abundantes e exclusivamente encontradas nos fragmentos de cerrado.The objective of this work was to identify soil attributes and classes associated to the occurrence of forest and tropical savannah remnants in Campinas, SP, Brazil. Twenty seven native vegetation fragments were studied. Soil morphological, chemical, and physical characterization were carried out, along with floristic-phytosociological survey of the tree stratum. Canonic correspondence analysis identified variables better correlated with plant species distribution. Fifteen environment variables explained 31% of the variance of

  1. Infrastructure sufficiency in meeting water demand under climate-induced socio-hydrological transition in the urbanizing Capibaribe River BasinBrazil

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    A. Ribeiro Neto

    2014-03-01

    Full Text Available Water availability for a range of human uses will increasingly be affected by climate change especially in the arid and semi-arid tropics. This paper aims to evaluate the ability of reservoirs and related infrastructure to meet targets for water supply in the Capibaribe River Basin (CRB, in the state of Pernambuco, Brazil. The basin has experienced spatial and sectoral (agriculture-urban reconfiguration of water demands. Human settlements that were once dispersed, relying on intermittent sources of surface water, are now increasingly experiencing water-scarcity effects. As a result, rural populations in the CRB are concentrating around infrastructural water supplies in a socio-hydrological transition process that results from (a hydroclimatic variability, (b investment and assistance programs that may enhance but can also supplant local adaptive capacity, and (c demographic trends driving urbanization of the state capital, Recife, which mirror urban growth across Brazil. In the CRB, demands are currently composed of 69.1% urban potable water, 14.3% industrial, 16.6% irrigation (with ecosystem-service demands met by residual flow. Based on the application of linked hydrologic and water-resources models using precipitation and temperature projections of the IPCC SRES A1B scenario, a reduction in rainfall of 31.8% translated to streamflow reduction of 67.4% under present reservoir operations rules. The increasing demand due to population was also taken into account. This would entail severe water supply reductions for human consumption (−45.3% and irrigation (−78.0% by the end of the 21st century. This study demonstrates the vulnerabilities of the infrastructure system during socio-hydrological transition in response to hydroclimatic and demand variabilities in the CRB and also indicates the differential spatial impacts and vulnerability of multiple uses of water to changes over time. The paper concludes with a discussion of the broader

  2. Challenges for bathing in rivers in terms of compliance with coliform standards. Case study in a large urbanized basin (das Velhas River, Brazil).

    Science.gov (United States)

    von Sperling, Marcos; von Sperling, Eduardo

    2013-01-01

    This paper presents a case study on the prospects of bathing in a large water course (das Velhas River, Brazil), which crosses the important metropolitan region of Belo Horizonte (25 municipalities), receiving several point and diffuse discharges. The studies were carried out based on a mathematical simulation of thermotolerant coliforms over 227 km of the river, using an adaptation of the Qual2E model (model Qual-UFMG). Simulations of intervention scenarios were made for the current conditions, with three reference flows for the das Velhas River, tributaries and direct contribution: Q7,10 (representative of low-flow conditions), Q50 (average conditions) and Q10 (rainy season). The intervention scenarios simulated were: (a) current conditions without intervention; (b) scenario with effluent disinfection in the two largest wastewater treatment plants in the basin (around 2.4 million inhabitants); (c) scenario with 95% sewage collection and treatment, with disinfection in all municipalities of the study area; (d) scenario with the calculation of values required for the coverage of sewage treatment and coliform removal efficiencies based on a mathematical optimization process. The monitoring data and results of all simulations indicated improvement in coliform concentration as the river flows downstream. However, results suggested that disinfection per se is not enough. Even under hypothetical conditions of excellent sanitary infrastructure for a developing country, coverage of collection and treatment of 95% of the generated sewage, and treatment with disinfection at all wastewater treatment plants, concentrations of thermotolerant coliforms in das Velhas River are likely to be above the maximum allowable of 1,000 MPN/100 mL for bathing purposes. The mathematical optimization indicated the need for very high percentages of sewage treatment coverage (near 100%, i.e. universality of collection and treatment) and implementation of disinfection in most treatment plants

  3. A Web-based planning support tool for sediment management in a meso-scale river basin in Western Central Brazil.

    Science.gov (United States)

    Lorz, C; Neumann, C; Bakker, F; Pietzsch, K; Weiß, H; Makeschin, F

    2013-09-01

    In scope of an IWRM concept for the Federal District, Western Central Brazil we developed a planning support tool, which enables non-experts to test the effects of land-use and land-cover change (LULCC) on landscape processes and landscape functions (LPF) related to sediment generation and retention. For this purpose we developed the web-based tool Letsmap do Brasil. The tool has two principal layers. The upper layer contains information on land use and its effect on LPF, i.e. sediment retention, runoff control, nitrogen loss control and agronomic value. The parameterized relation between land use and LPF is the core of the whole system. For each LPF a value specific to land use has been assigned. A second layer contains information on landscape properties and potentials (LPP), e.g. potential for sediment input in river networks and runoff potential. By linking land use and LPPs the system provides a spatially explicit assessment of effects of LULCC on landscape processes and functions (LPF). Letsmap do Brasil might have two major purposes. (1) It will support decision-making in river basin management and sediment management. By creating their own land-use/cover pattern non-expert users are enabled to test effects of LULCC on LPFs. (2) It will support and train non-experts to participate in decision processes in land-use planning. Because of its high adaptability, transparency, and simple handling Letsmap do Brasil might be used as tool in river basin management and land-use planning.

  4. Paleoenvironmental reconstitution of Motuca and Sambaíba formations, Permian-Triassic of the Parnaíba Basin in southwest Maranhão state, Brazil

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    Francisco Romério Abrantes Júnior

    2013-09-01

    Full Text Available The interval between the Late Paleozoic and Early Mesozoic was marked by paleogeographic and paleoclimatic global changes, partly attributed to catastrophic events. The intense continentalization of the supercontinent Pangaea of End-Permian propitiated the development of extensive deserts that succeeded the coastal and platform environments of Early Permian. The records of these events in northern Brazil are found in intracratonic basins, particularly in the Permo-triassic succession of the Parnaíba Basin. The facies and stratigraphic outcrops analysis of this succession allowed the individualization of 14 sedimentary facies grouped into four facies associations (FA: FA1 and FA2 related to deposits of Motuca Formation and, FA3 and FA4, representative of the base of Sambaíba Formation. The FA1 – Shallow lake/Mudflat consists of red laminated mudstone with lenses of gypsum, calcite and marl, besides lobes of sigmoidal sandstones. The FA2 – Saline pan consists of lenticular bodies of laminated gypsum, nodular gypsum and gypsarenite, overlapped by greenish mudstones with dolomite nodules and palygorskite. The FA3 – sand sheet and FA4 – dunes field are formed, respectively, for orange cream sandstones with even parallel stratification and medium- to large-scale cross-bedding. In the contact between Motuca and Sambaíba formations occurs a deformed interval, laterally continuous for hundreds of kilometers. Brecciated and contorted bedded siltstones and mudstone (Motuca Formation and sandstone with sinsedimentary faults/microfaults, convolute lamination and mud-filled injection dykes (Sambaíba Formation are interpreted as seismites triggered by high magnitude earthquakes (> 8 according Richter scale.

  5. Palaeobotanical evidence of wildfires in the Late Palaeozoic of South America - Early Permian, Rio Bonito Formation, Paraná Basin, Rio Grande do Sul, Brazil

    Science.gov (United States)

    Jasper, André; Uhl, Dieter; Guerra-Sommer, Margot; Mosbrugger, Volker

    2008-12-01

    Fossil charcoal, as direct evidence of palaeowildfires, has repeatedly been reported from several plant-bearing deposits from the Late Palaeozoic of the Northern Hemisphere. In contrast charcoal reports from the Late Palaeozoic deposits of the Southern Hemisphere are relatively rare in comparison to the Northern Hemisphere. Although the presence of pyrogenic coal macerals has repeatedly been reported from Late Palaeozoic coals from South America, no detailed anatomical investigations of such material have been published so far. Here is presented an anatomical analysis of charcoal originating from Early Permian sediments of the Quitéria Outcrop, Rio Bonito Formation, Paraná Basin, located in the central-eastern portion of Rio Grande do Sul, Brazil. This charcoal comes from two different coaly facies, and it was possible to scrutinize between three types, based on anatomical characters of the charcoal. Two of these charcoal types can be correlated to gymnosperm woods, and the other type corresponds to strongly permineralized bark with characteristic features of lycopsids. The presence of charcoal in different facies, ranging from parautochtonous to allochtonous origin, indicates that different vegetation types, i.e. plants which grew under wet conditions in the lowland as well as in the more dry hinterland, have experienced wildfires. Taking into account previous petrographic and lithological analyses from the facies in which the charcoal occurs and from the conditions of the wood and bark fragments, it was possible to speculate that the intensity of such wildfires most probably corresponds to forest-crown fires. Moreover, it is possible to state that wildfires have been a more or less common element in distinct Late Palaeozoic terrestrial ecosystems in the South American part of Gondwana. The data support previous assumptions on the occurrence of wildfires in the Early Permian of the Paraná Basin which were based solely on coal-petrographic data.

  6. Vascular epiphytes of the Atlantic Forest in the Sinos River basin, state of Rio Grande do Sul, Brazil: richness, floristic composition and community structure.

    Science.gov (United States)

    Barbosa, M D; Becker, D F P; Cunha, S; Droste, A; Schmitt, J L

    2015-05-01

    The Atlantic Forest, which has a vast epiphytic richness, is a priority area for preservation, listed as one of the five most important world hotspots. Vascular epiphyte richness, composition and community structure were studied in two fragments, one of the ombrophilous (29º43'42"S and 50º22'00"W) and the other of the seasonal (29º40'54"S and 51º06'56"W) forest, both belonging to the Atlantic Forest biome in the Sinos River basin, Rio Grande do Sul, Brazil. In each fragment, 40 trees, divided into four ecological zones, were analyzed. In each zone, the occurrence of the species was recorded, and the importance value of each species was calculated according to the frequency of phorophytes and intervals, and cover scores. The Shannon index was calculated for the two communities. In the fragment of the ombrophilous forest (F1), 30 epiphytic species were recorded, and in the seasonal forest (F2), 25. The highest importance value was found for Microgramma squamulosa (Kaulf.) de la Sota in both fragments. The diversity indexes for F1 (H'=2.72) and F2 (H'=2.55) were similar and reflected the subtropical location of the areas. The decrease in mean richness in both fragments in zone 3 (internal crown) to zone 4 (external crown) may be associated with time and space availability for epiphyte occupation and microclimate variations. Exclusive species were found in the areas, which suggest that a greater number of preserved fragments may result in a greater number of preserved epiphytic species in the Sinos River basin.

  7. A new "Bat-Voiced" species of Dendropsophus Fitzinger, 1843 (Anura, Hylidae) from the Amazon Basin, Brazil.

    Science.gov (United States)

    Orrico, Victor G D; Peloso, Pedro L V; Sturaro, Marcelo J; Da Silva-Filho, Heriberto F; Neckel-Oliveira, Selvino; Gordo, Marcelo; Faivovich, Julián; Haddad, Célio F B

    2014-11-06

    We describe Dendropsophus ozzyi sp. nov., a new species of treefrog, tentatively included in the Dendropsophus microcephalus Group and most notably diagnosed by the presence of pointed fingers and an advertisement call with a very high dominant frequency. The new species is known from three localities in the Brazilian Amazon forest, two on western State of Pará and one (the type locality) in eastern State of Amazonas (03°56'50"S and 58°26'36"W, 45 m a.s.l.).

  8. Biodegradação de fenol por uma nova linhagem de A spergillus sp. isolada de um solo contaminado do sul do Brasil Biodegradation of phenol by a newly Aspergillus sp. strain isolated from a contaminated soil in southern Brazil

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    Cátia Tavares dos Passos

    2009-01-01

    Full Text Available The main goal of this work was to study the biodegradation of phenol in batch mode by a filamentous fungus isolated from a contaminated site in Southern Brazil. A better performance was obtained by previous adaptation of the microorganism to the toxic chemical. A 2³ experimental design was proposed and it could be observed total phenol degradation in 72 h using 500 mg L-1 glucose, inoculum of 20% and agitation of 200 rpm, resulting a biodegradation rate of 3.76 mg L-1 h-1. In relation to phenol tolerance, Aspergillus sp. LEBM2 was able to consume up to 989 ± 15 mg L-1.

  9. Ergasilus chelangulatus sp. nov. (Copepoda: Ergasilidae) a branchial parasite of the freshwater catfish, Pimelodus maculatus from the upper São Francisco River, Brazil Ergasilus chelangulatus sp. nov. (Copepoda: Ergasilidae) parasito das brânquias do "mandi", Pimelodus maculatus do alto rio São Francisco, Brasil

    OpenAIRE

    Vernon E. Thatcher; Brasil-Sato,Marilia C.

    2008-01-01

    Ergasilus chelangulatus sp. nov. is described from the freshwater fish, Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae) of the upper São Francisco River, Minas Gerais State, Brazil. The new species is based on female specimens and the male is unknown. This species has a serrate seta on exopod one and a two-segmented first endopod, as do most Amazonian species of this genus. The body is elongate and produced anteriorly. The antennae are elongate and have prominent sensilla on se...

  10. Anamnese and physical examination are the main strategies for detection of systemic recidive in patients with breast cancer: Faculdade de Medicina do ABC (SP, Brazil) experience; Anamnese e exame fisico sao as principais estrategias para o rastreamento de recidiva sistemica em pacientes com cancer de mama em seguimento: experiencia da Faculdade de Medicina do ABC, SP, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Santos, Andrea Felice dos; Segredo, Manuella Pacifico; Nunes Pinto, Fernanda; Centofanti, Guilherme; Sarmano, Eliana Sueco Tibana [Faculdade de Medicina do ABC, Santo Andre, SP (Brazil); Megale Costa, Luciano Jose; Giglio, Auro del [Faculdade de Medicina do ABC, Santo Andre, SP (Brazil). Disciplina de Oncologia]. E-mail: sandrabr.netpoint.com.br

    2004-07-01

    Objective: to evaluate the strategies for the detection of distant recurrence after primary treatment of breast cancer at Oncology Clinics of ABC Foundation School of Medicine, SP, Brazil. Methods: a retrospective study of 206 charts from 1996 to 2002 was carried out. We analyzed the 16 identified charts of patients who had distant recurrence. Results: History and physical examination were the first indicators of distant recurrence in 68.7% of the patients. Conclusion: history and physical examinations the most sensitive surveillance strategy for the detection of distant recurrence in the follow-up of patients with breast cancer after primary treatment at our institution. (author)

  11. Climate and Hydrological Data Analysis for hydrological and solute transport modelling purposes in the Muriaé River basin, Atlantic Forest Biome, SE Brazil

    Science.gov (United States)

    Santos, Juliana; Künne, Annika; Kralisch, Sven; Fink, Manfred; Brenning, Alexander

    2016-04-01

    The Muriaé River basin in SE Brazil has been experiencing an increasing pressure on water resources, due to the population growth of the Rio de Janeiro urban area connected with the growth of the industrial and agricultural sector. This leads to water scarcity, riverine forest degradation, soil erosion and water quality problems among other impacts. Additionally the region has been suffering with seasonal precipitation variations leading to extreme events such as droughts, floods and landslides. Climate projections for the near future indicate a high inter-annual variability of rainfall with an increase in the frequency and intensity of heavy rainfall events combined with a statistically significant increase in the duration of dry periods and a reduced duration of wet periods. This may lead to increased soil erosion during the wet season, while the longer dry periods may reduce the vegetation cover, leaving the soil even more exposed and vulnerable to soil erosion. In consequence, it is crucial to understand how climate affects the interaction between the timing of extreme rainfall events, hydrological processes, vegetation growth, soil cover and soil erosion. In this context, physically-based hydrological modelling can contribute to a better understanding of spatial-temporal process dynamics in the Earth's system and support Integrated Water Resourses Management (IWRM) and adaptation strategies. The study area is the Muriaé river basin which has an area of approx. 8000 km² in Minas Gerais and Rio de Janeiro States. The basin is representative of a region of domain of hillslopes areas with the predominancy of pasture for livestock production. This study will present some of the relevant analyses which have been carried out on data (climate and streamflow) prior to using them for hydrological modelling, including consistency checks, homogeneity, pattern and statistical analyses, or annual and seasonal trends detection. Several inconsistencies on the raw data were

  12. Rare Carboniferous and Permian glacial and non-glacial bryophytes and associated lycophyte megaspores of the Paraná Basin, Brazil: A new occurrence and paleoenvironmental considerations

    Science.gov (United States)

    Ricardi-Branco, Fresia; Rohn, Rosemarie; Longhim, Marcia Emilia; Costa, Juliana Sampaio; Martine, Ariel Milani; Christiano-de-Souza, Isabel Cortez

    2016-12-01

    Fossil bryophytes are rare because their preservation is compromised by the presence of a thin cuticle (if any) and a lack of lignin. Except for the occurrence of one bryophyte in the glacial Dwyka Group of the Karoo Basin, the other rare Late Paleozoic records in Gondwana are notably from the Paraná Basin in Southeast/South Brazil. Four bryophyte sites (including a newly discovered one) were found in the lower part of the thick Permo-Carboniferous glacial succession of the Itararé Group, and one was found in the Guadalupian Teresina Formation, which was roughly assigned to an epeiric sea (or "lake") dominated by a warm, semi-arid climate. This study describes the fossils from the new occurrence from the Itararé Group and discusses the context in which the bryophyte beds originated in the basin. The new samples confirm that all of the bryophytes of the Itararé Group can be classified as Dwykea araroii Ricardi-Branco et al. (a possible pleurocarp) and are associated with the lycophyte megaspore Sublagenicula brasiliensis (Dijkstra) Dybová-Jachowicz. In the much younger Teresina Formation, the bryophytes are Yguajemanus yucapirus Cristiano-de-Souza et al. and Capimirinus riopretensis Cristiano-de-Souza et al., and abundant charophytes and rare dwarf lycophyte stems and bracts are present in the same layers. Although the two stratigraphic units represent distinct paleoenvironments and climates, they seem to share some characteristics: a) the bryophyte assemblages were transported very little; b) they were deposited in very calm environments; c) they were the main components (along with some lycophytes) of local or poorly diversified regional vegetation. The low number of species, which is characteristic of opportunistic communities, can be explained by local or regional conditions that would have been stressful for the vascular plants in other areas. During the deposition of the Itararé Group, the main control was probably the cold climate in addition to a

  13. Modelling potential landscape sediment delivery due to projected soybean expansion: a scenario study of the Balsas sub-basin, Cerrado, Maranhão state, Brazil.

    Science.gov (United States)

    Barreto, Larissa; Schoorl, Jeroen M; Kok, Kasper; Veldkamp, Tom; Hass, Adriani

    2013-01-30

    In Brazil, agriculture expansion is taking place primarily in the Cerrado ecosystems. With the aim of supporting policy development and protecting the natural environment at relevant hotspots, a scenario study was conducted that concerned not only land-use change, but also the resulting effects on erosion and deposition. This coupled approach helped to evaluate potential landscape impacts of the land-use scenarios. In the study area, the Balsas sub-basin in Maranhão State, a model chain was used to model plausible future soybean expansion locations (CLUE-S model) and resulting sediment mobilization patterns (LAPSUS model) for a business-as-usual scenario. In the scenario, more erosion occurred in areas where the conversion of natural vegetation into soybean cultivation is likely to take place, but the generated sediments tended to accumulate mainly within the conversion areas, thus limiting the offsite effects of the increased erosion. These results indicated that when agricultural expansion is kept away from rivers, Cerrado conversion will have only a limited impact on the sediment loads of local rivers. Where land-use changes are most concentrated are coincident with areas where more new sediments are generated (higher erosion) and where more sediments are re-deposited.

  14. Palynological and sedimentary analysis of the Igarapé Ipiranga and Querru 1 outcrops of the Itapecuru Formation (Lower Cretaceous, Parnaíba Basin), Brazil

    Science.gov (United States)

    Ferreira, Neila N.; Ferreira, Elizabete P.; Ramos, Renato R. C.; Carvalho, Ismar S.

    2016-03-01

    The siliciclastic sediments of the Itapecuru Formation occur in a large area of the Parnaíba Basin and its deposits crop out along the Itapecuru River, in Maranhão State, northern Brazil. The palynological analysis of the Igarapé Ipiranga and Querru 1 outcrops strata yields a rich and diversified data. The presence of index-palynofloras in assemblages allows the identification of the Complicatisaccus cearensis Zone, of Late Aptian-Early Albian age. Terrestrial palynomorphs are abundant in the assemblages, being represented by bryophytes and pteridophytes, especially perisporate trilete spores (Crybelosporites and Perotrilites), and gymnosperms and angiosperms (Afropollis and Elaterosporites). The composition of palynological assemblages suggests the presence of moist soils for both outcrops. Acritarchs were recovered in the Querru 1 outcrop, which suggest a marine setting supporting a tidal flat environment indicated by facies associations. Furthermore, reworked Paleozoic palynomorphs were observed in the Querru 1 outcrop. The microflora from Igarapé Ipiranga outcrop suggests terrestrial environment corroborating with floodplain environment indicated by facies association.

  15. Distribution and origin of polycyclic aromatic hydrocarbons in surface sediments from an urban river basin at the Metropolitan Region of Curitiba, Brazil

    Institute of Scientific and Technical Information of China (English)

    Natalicio Ferreira Leite; Patricio Peralta-Zamora; Marco Tadeu Grassi

    2011-01-01

    The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) were determined in surface sediment samples from nine sites located at the Iguacu River Basin in the Metropolitan Region of Curitiba, Brazil to evaluate their distribution and sources.The total concentration of the PAHs was greater for sediments from highly urbanized areas, while the sediments from the IraíEnvironmental Protection Area (IraíEPA) showed significantly low concentrations.The sediments from the Iguacu and Barigui rivers were classified as highly contaminated, while those from the Cercado and Curralinho rivers were classified as moderately contaminated.The predominance of PAHs containing two to four aromatic rings in most of the samples suggested the direct input of raw sewage into the water resources evaluated.Benzo[g,h,i]perylene, dibenzo[a,h]anthracene and indeno[1,2,3-cd]pyrene were predominant in sediments from the areas under the greatest urban and industrial development.The correlation between thermodynamic stability and the kinetics of evolution presented by the isomeric pairs indicated that combustion is the predominant source of PAHs in the sediments because the combustion of fossil fuels affected most of the points evaluated, followed by combustion of biomass and eventually combustion of oil product inputs.In general, the results showed that areas under strong urban influence, as well as the IraíEPA, receive contributions of PAils from similar sources.

  16. Diametric structure of the shrub and tree vegetation around the headwaters in the Piauitinga River drainage basin, Salgado – Sergipe, Brazil

    Directory of Open Access Journals (Sweden)

    Ednei Santos de Almeida

    2013-06-01

    Full Text Available This study was carried out in order to analyze the diametric structure of the ciliary vegetation in headwaters in the Piauitinga River drainage basin, located at the town of Salgado, Sergipe, Brazil. One analyzed 14 headwaters, using a classification with regard to the conservation status and the type of reservoir, being divided into 4 categories: 1 punctual preserved (PPr, 1 punctual disturbed (PD, 6 punctual degraded (PD, and 6 diffuse degraded (DD. The survey was conducted through a population census of vegetation in a 50 m radius around the headwaters, equivalent to 0.79 ha, where one recorded all living shrub and tree individuals with diameter at breast height (DBH ≥ 5.0 cm. The individuals were distributed into diametric classes, at 2.5 cm intervals. The punctual preserved and the punctual disturbed headwaters showed a diametric structure characteristic of heterogeneous forests, with an “inverted J” shape. The diffuse and punctual degraded headwaters didn’t show the “inverted J” pattern, except for DD2, perhaps reflecting the higher numberof individuals in this headwater. The intense disturbance generated in the headwater areas, which are currently degraded, promoted the impoverishment of natural regeneration and, as a result, compromised the recruitment of individuals in the early diameter grades.

  17. Bryophyte and pteridophyte spores and other palynomorphs in quaternary marine sediments from Campos Basin, southeastern Brazil: Core BU-91-GL-05

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    Aline Gonçalves de Freitas

    2015-06-01

    Full Text Available This paper presents morphological descriptions and ecological data of cryptogam spores and other non-pollen palynomorphs from Quaternary sediments of Campos Basin, Rio de Janeiro, SE Brazil. The ages were derived from biostratigraphy of planktonic foraminifers and two radiocarbon dates, and suggest that sediment deposition started in the last 140,000 years BP. Thirty different types of palynomorphs were identified, described, and photographed: two bryophyte spores (sensu lato; 21 pteridophyte spores; four freshwater microalgae; onePseudoschizaea; and two microfungi. Some of the identified spores (Sphagnum, Blechnum, Cyatheaceae, Dennstaedtiaceae, Lycopodiella, Microgramma, Polypodium, Acrostichum, Pityrogramma, and Lygodium are related to the modern flora found on the northern coast of Rio de Janeiro State, at the Restinga of Jurubatiba, from vegetation types such as shrub swamp/coastal swamp formation, seasonally flooded forest, Clusia and Ericaceae woods, and disturbed vegetation. The freshwater microalgae and the microfungi are also presently recorded from the coastal lagoons of this region. The high spore concentration in slope sediments reflects the intense terrigenous influx, caused by a relative low sealevel during glacial stages. Palynological analysis suggests the presence of taxa from flooded forests and humid areas in the coastal plain during glacial and interglacial stages of the Late Pleistocene.

  18. Activity and habitat use of two species of stingrays (Myliobatiformes: Potamotrygonidae in the upper Paraná River basin, Southeastern Brazil

    Directory of Open Access Journals (Sweden)

    Domingos Garrone Neto

    Full Text Available The life history of freshwater stingrays (Potamotrygonidae under natural conditions has been poorly documented. In this study, we investigated theperiod of activity and the habitat use of two species of the genus Potamotrygon in the upper Paraná River basin, Southeastern Brazil. Potamotrygon falkneri and P. motoro are similar to each other as far as the analyzed behavior is concerned. Individuals of both species segregate according to their size, and in function of the depth and period of the day. Younger individuals inhabit mostly sandy beaches and places that are no deeper than four meters throughout the whole day. Bigger stingrays realize bathymetric migrations, alternating their position between places deeper than eight meters during the day, and shallow areas at night. Individuals of intermediate size inhabit transition environments that have greater habitat diversity. Both species presented mostly nocturnal habits, especially regarding their feeding behavior. The behavioral patterns observed seem to go through ontogenetic variations and probably change throughout the year, between dry and wet seasons.

  19. NAA: metals in surface waters, margin sediments, forage and cattle hair in flood plains of the Rio Doce basin, Minas Gerais, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Vasconcelos, Maria Adelaide R.V., E-mail: madelaide@fumec.br [Universidade Fundacao Mineira de Educacao e Cultura (FUMEC), Belo Horizonte, MG (Brazil). Mestrado em Construcao Civil, Meio Ambiente; Barbosa, Ana Flavia S.; Ruckert, Gabriela V., E-mail: mariavasc@unilestemg.br [Centro Universitario do Leste de Minas Gerais (UnilesteMG), Coronel Fabriciano, MG (Brazil). Mestrado em Engenharia Industrial; Menezes, Maria Angela B.C.; Silva, Maria Aparecida, E-mail: menezes@cdtn.br, E-mail: cida@cdtn.br [Centro de Desenvolvimento da Tecnologia Nuclear (CDTN/CNEN-MG), Belo Horizonte, MG (Brazil); Oliveira, Arno H. de, E-mail: heeren@nuclear.ufmg.br [Universidade Federal de Minas Gerais (UFMG), Departamento de Engenharia Nuclear Belo Horizonte, MG (Brazil)

    2011-07-01

    Metals are toxic and can cause damage to human health when they accumulate in the food chain. The aim of this study was to determine Al, As, Ba, Br, Ca, Ce, Cl, Co, Cr, Cs, Eu, Fe, Hg, K, Mg, Mn, Na, Rb, Sb, Sc, Ta, Th, Ti, U, V and Zn in different samples: surface waters, margin sediments, forages and cattle hairs in the region of the Rio Doce basin. The metals were analyzed by Neutron Activation Analysis - NAA at the Centre for Development of Nuclear Technology of the National Commission of Nuclear Energy - CDTN / CNEN. The sampling sites were taken at two points: P1- (Pingo D'agua - city, Ponte Queimada, in a no industrial area) and P2 - (Santana do Paraiso city, industrial and pasture areas, subject to frequent floods). The samples were collected in different seasons: July 2009 (dry season - winter) and February 2010 (rainy season - summer). These points were strategically chosen because P1 is located into the Parque Estadual do Rio Doce, considered a no industrial pollution region. Contrariwise, P2 is located in a region of high concentration of industries. In (P2) the Doce River receives its most polluted affluent upstream the Piracicaba River which is charged of several pollutants of industries of Steel Valley region, Brazil. In general, the results showed higher concentrations of the elements in P2 riverside area of livestock production and subject to flood. (author)

  20. REPRODUCTIVE CYCLE OF Leporinus copelandii (Pisces: Anostomidae FEMALES FROM THE LOWER PARAÍBA DO SUL RIVER BASIN, RJ – BRAZIL

    Directory of Open Access Journals (Sweden)

    Ana Paula Ribeiro Costa Erthal

    2015-12-01

    Full Text Available The aim of this study were investigate the reproductive biology of the fish Leporinus copelandii, a specie at risk of extinction in the lower Paraíba do Sul River basin. During a period of 14 months, a total of 143 females of red-piau were captured, between Itaocara and Campos dos Goytacazes cities (RJ, Brazil. A histological study shows four stages of the oocyte development (I, II, III and IV and five stages of the reproductive cycle of females: rest (1, initial maturation (2A, intermediary (2B, advanced (2C and spawned (4 were identified. The pattern of L. copelandii oocyte development suggests development type synchronous in two groups, characterizing total spawning. Spawned females were captured in November, two months after the peak of frequency of competent females for reproduction. Histologically, a little occurrence of empty follicles was observed in spawned females. The medium diameter of the type IV oocyte of the spawned females (1475.1 ± 884.3mm was significantly larger (Tukey, P <0.001; VC = 41.73%; n = 259 than advanced maturation females (1202.6 ± 245.3mm, what allows suggesting that the study place probably doesn't represent the reproductive area of L. copelandii.

  1. Distribution of 226Ra, 232Th and 40K in soils and sugar cane crops at Corumbataí river basin, São Paulo State, Brazil.

    Science.gov (United States)

    da Conceição, Fabiano Tomazini; Bonotto, Daniel Marcos; Jiménez-Rueda, Jairo Roberto; Roveda, José Arnaldo Frutuoso

    2009-06-01

    The common use of phosphate fertilizers NPK and amendments in sugar cane crops in Brazilian agriculture may increase the (226)Ra, (232)Th and (40)K activity concentrations in soils and their availability for plants and human food chain. Thus, the main aim of this study was to evaluate the distribution of (226)Ra, (232)Th and (40)K in soils and sugar cane crops in the Corumbataí river basin, São Paulo State, Brazil. The gamma spectrometry was utilized to measure the (226)Ra, (232)Th and (40)K activity concentration in all samples. The soil-to-sugar cane transfer factors (TF) were quantified using the ratio between the radionuclide activity concentration in sugar cane and its activity concentration in soil. The results show that, although radionuclides incorporated in phosphate fertilizers and amendments are annually added in the sugar cane crops, if utilized in accordance with the recommended rates, their use does not lead to hazards levels in soils. The soil-to-sugar cane transfer of radionuclides occurred in the following order (40)K>(226)Ra>(232)Th. Therefore, under these conditions, radionuclides intake through consumption of sugar is not hazardous to human health.

  2. Green line fracturing systems fluids in Campos Basin, Brazil; Sistemas de fluidos de fraturamento na Bacia de Campos: evolucao em beneficio do meio ambiente

    Energy Technology Data Exchange (ETDEWEB)

    Melo, Alexandre B. de; Araujo, Cosme J.C. de; Martinho, Flavio M.; Gaspar, Fernando [BJ Services do Brasil, Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The constant demand for Services Companies in Oil and Gas Industry to reduce the environmental impacts has led to a race in search of new cleaner technologies. Fluids with low toxicity are the target of research and development by the companies which are committed to ensure the aspects of quality, health, safety and environment from manufacturing up to the use in the final destination of these products. The replacement of these fluids is happening at a larger speed than in the past on the based in two factors: greater awareness on the part of these companies in relation to the environmental and by new environmental laws. The fluids systems used in fracturing operations are not an exception to this rule. Service companies today are in the process of replacing their formulations with systems less aggressive to the environment so-called 'green' systems. In this context the new technological developments of fracturing fluids are of fundamental importance to assist the new environmental requirements of both operators and government regulatory bodies and also to ensure better effectiveness of these products. This paper reports the research, development and application of new environmentally acceptable fracturing fluids technology, reviews the pioneering case histories in offshore operations and the benefits experienced in the Campos Basin - Brazil. (author)

  3. Inversion of TEM data and analysis of the 2D induced magnetic field applied to the aquifers characterization in the Paraná basin, Brazil

    Science.gov (United States)

    Realpe Campaña, Julian David; Porsani, Jorge Luís; Bortolozo, Cassiano Antonio; Serejo de Oliveira, Gabriela; Monteiro dos Santos, Fernando Acácio

    2017-03-01

    Results of a TEM profile by using the fixed-loop array and an analysis of the induced magnetic field are presented in this work performed in the northwest region of São Paulo State, Brazil, Paraná Basin. The objectives of this research were to map the sedimentary and crystalline aquifers in the area and analyzing the behavior of the magnetic field by observation of magnetic profiles. TEM measurements in the three spatial components were taken to create magnetic profiles of the induced (secondary) magnetic field. The TEM data were acquired using a fixed transmitter loop of 200 m × 200 m and a 3D coil receiver moving along a profile line of 1000 m. Magnetic profiles of dBz, dBx and dBy components showed symmetrical spatial behavior related with loop geometry. z-component showed a behavior probably related to superparamagnetic effect (SPM). dBz data was used to perform individual 1D inversion for each position and to generate an interpolated pseudo-2D geoelectric profile. The results showed two low resistivity zones: the first shallow, between 10 m and 70 m deep, probably related to the Adamantina Formation (sedimentary aquifer). The second between 200 m and 300 m depth, probably related to a fractured zone filled with water or clay inside the basalt layer of the Serra Geral Formation (crystalline aquifer). These results agree with the well logs information available in the studied region.

  4. Variações da temperatura da água de um pequeno lago artificial ao longo de um ano em Piracicaba - SP Water temperature variations during one year in a small lake at Piracicaba - SP, Brazil

    Directory of Open Access Journals (Sweden)

    L. R. Angelocci

    1995-12-01

    Full Text Available Foram estudadas as variações térmicas da água em quatro profundidades (0,10; 0,30; 0,60 e 1,20 m em um pequeno lago artificial situado no munícipio de Piracicaba-SP, entre agosto de 1987 e agosto de 1988, como subsídio à aquacultura e manejo de anfíbios em cativeiro. Independente das amplitudes térmicas do ar serem ou não elevadas, ao longo de um dia as flutuações térmicas na água foram pequenas, sendo que no período diurno foram maiores nas duas menores profundidades, principalmente entre agosto e janeiro. Em dias de alta irradiância solar a temperatura da água mostrou-se superior à do ar na maior parte do dia e em dias chuvosos ou muito nublados isso ocorreu no dia inteiro. Em conseqüência, as temperaturas médias diárias da água em todas as profundidades mostraram-se sistematicamente, com poucas exceções, superiores à do ar em todos os meses. Houve maior estratificação térmica do lago no período entre agosto e janeiro. São discutidas as relações do regime térmico do lago com dementes meteorológicos e apresentados valores extremos diários e anuais de temperatura da água.Thermal variations of water at four depths (0.10; 0.30; 0.60 and 1.20 m in a small lake of the Piracicaba county, São Paulo State, Brazil, were measured during the period of August 1978 to August 1988, as a subsidy to the aquaculture and the husbandry of amphibia in captivity. During a day, the thermal fluctuations of water were small, independently of the air temperature amplitude; in the daytime fluctuations were greater at the depths of 0.10 and 0.30 m, mainly in the period August-January. In clear days the temperature of water was greater than that of the air in most of the day, while in cast or rainny days this fact occurred all day. Consequently, daily mean temperatures of water at the four depths of measurement were greater than the daily mean air temperatures, except for a few days. Thermal stratification was more pronounced in the

  5. Environmental adaptation of the source of the subbasin of Rico Stream, Monte Alto - SP, Brazil Adequação ambiental da nascente da sub-bacia do Córrego Rico, Município de Monte Alto - SP

    Directory of Open Access Journals (Sweden)

    Teresa C. T. Pissarra

    2013-04-01

    Full Text Available The aim of this study was to define the photographic patterns that represent the use and occupation of the landcover of the "spring" of the Rico Stream subbasin, located at Monte Alto, state of São Paulo (SP, Brazil, for environmental adaptation regarding the Brazilian Forest Law. The mapping was performed using remote sensing techniques and visual interpretation of the World View image, followed by the digitalization of the net of drainage and vegetation (natural and agricultural at the AutoCad software with documents and field work. The study area has 2141.53 ha and the results demonstrated that the main crop is sugarcane with 546.34 ha, followed by 251.22 ha of pastures, 191.71 ha of perennial crops, 57.31 ha of Eucalyptus and 49.52 ha of onion, confirming the advance of sugarcane culture in the region. The region has 375.04 ha of areas of permanent preservation (APPs, and of this area it was found that only 72.17 ha (19.24% has arboreal vegetation or natural forest, and 302.87 ha of these areas need to be enriched and reforested with native vegetation from the region, according to the current legislation. The data of the area enable future proposals of models for environmental adaptation to the microbasin according to the current environmental legislation.Este trabalho teve como principal objetivo definir padrões fotográficos que representem o uso e a ocupação do solo da "cabeceira" de drenagem do Córrego Rico, localizada no Município de Monte Alto, Estado de São Paulo, para fins de adequação ambiental no que tange à legislação florestal brasileira. O mapeamento foi realizado utilizando técnicas de sensoriamento remoto e interpretação visual da imagem World View, seguida da digitalização da rede de drenagem e vegetações (naturais e agrícolas no AutoCad, com auxílio de documentos e trabalho de campo. A área de estudo apresenta uma superfície de 2.141,53 ha, e os resultados permitiram constatar que a principal cultura

  6. Estudo de sobrevivência de uma coorte de pessoas de 60 anos e mais no município de Botucatu (SP - Brasil Survival study of a sixty year-old and older cohort in Botucatu (SP - Brazil

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    Tania Ruiz

    2003-09-01

    Full Text Available O aumento proporcional do número de idosos na população tem motivado estudos no sentido de melhorar a qualidade de vida desta faixa etária através de políticas sociais e, entre elas, o planejamento em saúde. Com o objetivo de conhecer riscos de mortalidade para a população de sessenta anos e mais, um estudo de sobrevida foi realizado rastreando, no ano de 1992, os idosos participantes de um inquérito de morbidade referida realizado na cidade de Botucatu em 1983/84. Foram localizados 89,6% destes idosos. Curvas de sobrevivência foram calculadas com o método de Kaplan-Meier e a análise de riscos, utilizando-se a Regressão Múltipla de Cox ajustando-se o modelo agregando as variáveis por blocos. Para o sexo masculino foram encontradas associadas, independentemente, ao aumento da mortalidade as seguintes categorias de variáveis: idade de 70 anos e mais: Hazard Ratio (HR=2,4 (1,6 - 3,7; salário menor que um salário mínimo: HR=2,2 (1,3 - 3,8; ter "outras rendas": HR=2,2 (1,3 - 3,9; ser o chefe da família ou seu cônjuge: HR=2,3 (1,2 - 2,4; referência de doenças do aparelho circulatório: HR=1,6 (1,1 - 2,4; referência de diabetes mellitus: HR=3,0 (1,3 - 7,0. Para o sexo feminino, foram encontradas associadas a idade de 70 anos e mais: HR=4,6 (3,0 - 7,1; referência de diabetes mellitus: HR=3,0 (1,7-5,3 e ter "outras rendas": HR=2,0 (1,1 - 4,0.In order to determine mortality predictors among individuals aged 60 years and over, a survival study was conducted in 1992 by tracking a population of elders who participated in a general self-rated morbidity survey in 1983/84, in Botucatu, SP - Brazil. Kaplan-Meier estimates and the Cox proportional hazards method, available in SPSS and SAS statistical packages (v. 6.12, were used to analyze survival. The following mortality predictors were found for males (p<0.05: being 70 years or older: Hazard Ratio (HR=2.4 (1.6 - 3.7; earning one or less than one minimum wage: HR=2.2 (1.3 - 3.8; having

  7. A new Xenacanthiformes shark (Chondrichthyes, Elasmobranchii from the Late Paleozoic Rio do Rasto Formation (Paraná Basin, Southern Brazil

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    VICTOR E. PAULIV

    2014-03-01

    Full Text Available The Brazilian records on Xenacanthiformes include teeth and cephalic spines from the Parnaíba, Amazonas and Paraná basins. This work describes a new species of Xenacanthidae, collected in an outcrop of Serrinha Member of Rio do Rasto Formation (Wordian to Wuchiapingian, Paraná Basin, municipality of Jacarezinho, State of Paraná. The teeth of the new species are two or three-cuspidated and the aboral surface show a smooth concavity and one rounded basal tubercle. The coronal surface presents one semi-spherical and subcircular coronal button, and also two lateral main cusps and one central (when present with less than one fifth of the size of the lateral cusps in the labial portion. The lateral cusps are asymmetric or symmetric, rounded in transversal section, lanceolate in longitudinal section, devoid of lateral carinae and lateral serrations, and with few smooth cristae of enameloid. In optical microscope the teeth show a trabecular dentine (osteodentine base, while the cusps are composed by orthodentine, and the pulp cavities are non-obliterated by trabecular dentine. The fossil assemblage in the same stratigraphical level and in the whole Rio do Rasto Formation indicates another freshwater record for xenacanthid sharks.

  8. A new Xenacanthiformes shark (Chondrichthyes, Elasmobranchii) from the Late Paleozoic Rio do Rasto Formation (Paraná Basin), Southern Brazil.

    Science.gov (United States)

    Pauliv, Victor E; Dias, Eliseu V; Sedor, Fernando A; Ribeiro, Ana Maria

    2014-03-01

    The Brazilian records on Xenacanthiformes include teeth and cephalic spines from the Parnaíba, Amazonas and Paraná basins. This work describes a new species of Xenacanthidae, collected in an outcrop of Serrinha Member of Rio do Rasto Formation (Wordian to Wuchiapingian), Paraná Basin, municipality of Jacarezinho, State of Paraná. The teeth of the new species are two or three-cuspidated and the aboral surface show a smooth concavity and one rounded basal tubercle. The coronal surface presents one semi-spherical and subcircular coronal button, and also two lateral main cusps and one central (when present) with less than one fifth of the size of the lateral cusps in the labial portion. The lateral cusps are asymmetric or symmetric, rounded in transversal section, lanceolate in longitudinal section, devoid of lateral carinae and lateral serrations, and with few smooth cristae of enameloid. In optical microscope the teeth show a trabecular dentine (osteodentine) base, while the cusps are composed by orthodentine, and the pulp cavities are non-obliterated by trabecular dentine. The fossil assemblage in the same stratigraphical level and in the whole Rio do Rasto Formation indicates another freshwater record for xenacanthid sharks.

  9. A water quality index model using stepwise regression and neural networks models for the Piabanha River basin in Rio de Janeiro, Brazil

    Science.gov (United States)

    Villas Boas, M. D.; Olivera, F.; Azevedo, J. S.

    2013-12-01

    The evaluation of water quality through 'indexes' is widely used in environmental sciences. There are a number of methods available for calculating water quality indexes (WQI), usually based on site-specific parameters. In Brazil, WQI were initially used in the 1970s and were adapted from the methodology developed in association with the National Science Foundation (Brown et al, 1970). Specifically, the WQI 'IQA/SCQA', developed by the Institute of Water Management of Minas Gerais (IGAM), is estimated based on nine parameters: Temperature Range, Biochemical Oxygen Demand, Fecal Coliforms, Nitrate, Phosphate, Turbidity, Dissolved Oxygen, pH and Electrical Conductivity. The goal of this study was to develop a model for calculating the IQA/SCQA, for the Piabanha River basin in the State of Rio de Janeiro (Brazil), using only the parameters measurable by a Multiparameter Water Quality Sonde (MWQS) available in the study area. These parameters are: Dissolved Oxygen, pH and Electrical Conductivity. The use of this model will allow to further the water quality monitoring network in the basin, without requiring significant increases of resources. The water quality measurement with MWQS is less expensive than the laboratory analysis required for the other parameters. The water quality data used in the study were obtained by the Geological Survey of Brazil in partnership with other public institutions (i.e. universities and environmental institutes) as part of the project "Integrated Studies in Experimental and Representative Watersheds". Two models were developed to correlate the values of the three measured parameters and the IQA/SCQA values calculated based on all nine parameters. The results were evaluated according to the following validation statistics: coefficient of determination (R2), Root Mean Square Error (RMSE), Akaike information criterion (AIC) and Final Prediction Error (FPE). The first model was a linear stepwise regression between three independent variables

  10. Mixed carbonate-siliciclastic sedimentation in forebulge grabens: An example from the Ediacaran Bambuí Group, São Francisco Basin, Brazil

    Science.gov (United States)

    Reis, Humberto L. S.; Suss, João F.

    2016-06-01

    Mixed carbonate-siliciclastic successions have been described in multiple Phanerozoic sedimentary settings recording the dynamic interplay of tectonics, eustasy, climate, in situ carbonate production, and variations in siliciclastic sediment supply. The Ediacaran Bambuí 1st-order sequence (i.e., Bambuí Group) covers most of the intracratonic São Francisco basin (southeast Brazil) and encompasses thick packages of carbonate and fine- to coarse-grained siliciclastic strata. Recording a marine foreland basin stage that developed in the São Francisco plate during the Neoproterozoic-early Paleozoic West Gondwana assembly, the Ediacaran deposits unconformably overlie Archean-Paleoproterozoic metamorphic assemblages of the Sete Lagoas basement high and fill a series of kilometer-long grabens in the southern São Francisco basin. Seismic data reveal that these troughs developed through the extensional reactivation of ancient basement structures along with the tectonically driven forebulge uplift of the Sete Lagoas high, in the early evolutionary stages of the Bambuí basin cycle. Based on the detailed description of continuous drill cores of a well recently drilled during hydrocarbon exploration campaigns, we recognized two transgressive-regressive 2nd-order sequences preserved within one of the focused grabens: (i) Sequence 1 includes the glaciogenic deposits of the basal Carrancas Formation that grade upward into the carbonate ramp successions of the Sete Lagoas Formation; (ii) Sequence 2 contains the siliciclastic-dominated and deep water to deltaic strata of the Serra de Santa Helena Formation and passes upward into peritidal carbonates of the Lagoa do Jacaré Formation. These sedimentary successions encompass suites of retrogradational, aggradational, and progradational lower-rank cycles and are bounded by erosional surfaces. Regional seismic interpretation, well data, and the available literature indicate that most of these deposits and their correlatives are

  11. Note on phoptography register and preliminares observations from puerulus to juvenile of Panulirus argus after settlement in Amansia sp. macroalgae in Brazil / Nota sobre registro fotográfico e observações preliminares de puerulus a juvenil de Panulirus argus após o assentamento em macroalgas Amansia sp. no Brasil

    Directory of Open Access Journals (Sweden)

    Marco Antonio Igarashi

    2010-09-01

    Full Text Available Puerulus of Panulirus argus settlement is generally in the shallows and typically reside solitary in branched red algae Amansia sp. This type of habitat may be found in many areas of the Ceara State Coast, where macroalgae Amansia sp. with associated other genera of macroalgae and crevice shelters function as habitat for young juvenile spiny lobster. The objective of this work was to help to explain the settlement of puerulus and juvenile of P. argus in the coast of Ceará, Brazil and their behaviour.Puerulus de Panulirus argus assentam geralmente em locais rasos, tipicamente e solitariamente em ramos de algas vermelhas como a Amansia sp. Este tipo de habitat pode ser encontrado em muitas áreas da Costa do Estado do Ceará, onde a macroalga Amansia sp. associado com outros gêneros de macroalgas e fendas nas rochas funcionam como habitat para juvenis. O objetivo desse trabalho foi contribuir no conhecimento do comportamento e habitat de puerulus e juvenil de P. argus no Brasil.

  12. Assessment of water quality in areas of ecological economic zoning of the Guapiaçu-Macacu basin, RJ, Brazil

    Directory of Open Access Journals (Sweden)

    Darcilio Fernandes Baptista

    2012-04-01

    Full Text Available Aquatic ecosystems have often been significantly altered by multiple impacts. The Guapiaçu-Macacu Hydrographic Complex is an important basin in Rio de Janeiro characterized by distinct ecological zones that make up an Ecological Economic Zoning. This research evaluated ecological upright in segments of this Complex located in Wildlife Conservation Zone (WCZ and the Agricultural Use Zone (AUZ using the Protocol Visual Assessment (PVA and physical, chemicals and microbiology methods. The results showed a significant difference between the points of lowest contamination degree in WCZ and stretches with a greater impact degree in AUZ. The PVA was more sensible than the conventional parameters in the resolution between segments impacted environmentally and impacted middle located in AUZ. This type of evaluation proved to be more effective in environmental monitoring the water quality for watersheds that have their Ecological Economic Zoning Plan. Therefore, the use of physical, chemical and microbiological methods must be complemented by the PVA.

  13. Anatomy and systematics of Anodontites Elongatus (Swainson from Amazon and Parana Basins, Brazil (Mollusca, Bivalvia, Unionoida, Mycetopodidae

    Directory of Open Access Journals (Sweden)

    Luiz Ricardo L Simone

    1997-12-01

    Full Text Available The anatomy of Anodontiies elongatus (Swainson, 1823, a rare species restricted to the Amazon and Parana Basins, is described by first time, showing a group of conchological and anatomical characters exclusive of this species that may be analyzed to identify it. Diagnosis of A. elongatus: shell long antero-posteriorly, umbones prominent, periostracum opaque and smooth, two posterior radial striae; middle fold of mantle edge veiy tall; gill long antero-posteriorly and short dorso-ventrally, extending about a half of it total length beyond visceral mass; palps proportionally small, several furrows in its outer surface; stomach without esophageal transversal ridjp, dorsal hood and gastric shield poorly developed, major typhlosole entering in ddd , posterior pouch of sa³ very-long; style sac reduced, without crystalline style; distal region of intestine and rectum with a well developed typhlosole, "T" in section, other intestinal regions without folds; gonad gonochoristic.

  14. Particulate heavy metal transport in the lower Paraíba do Sul River basin, southeastern, Brazil

    Science.gov (United States)

    Salomão, M. S. M. B.; Molisani, M. M.; Ovalle, A. R. C.; Rezende, C. E.; Lacerda, L. D.; Carvalho, C. E. V.

    2001-03-01

    In the present study an attempt has been made to calculate the mass transfers of suspended particulate matter and associated heavy metal within the lower portion of the Paraíba do Sul River drainage basin and the contribution of its tributaries. The highest metal loads were related with the highest water flows and, consequently, with the highest suspended particulate matter loads, which increased both by surface runoff and sediment resuspension. The highest flow month for the total transported load contributed between 34 and 66% of the total metal transported per year. The total load transported during the entire rainy season ranges from 82 to 93% of the total transported load. The importance of the tributary input for the total transported load of the Paraíba do Sul River was generally lower than 10%, although in some months, when the Paraíba do Sul River had low water discharge and strong local rain occurred, this increased upto 40%.

  15. Descrição de Austinixa bragantina sp. nov. (Crustacea, Decapoda, Pinnotheridae do litoral do Pará, Brasil Description of Austinixa bragantina, sp. nov. (Crustacea, Decapoda, Pinnotheridae from the coast of Pará State, Brazil

    Directory of Open Access Journals (Sweden)

    Petrônio A. Coelho

    2005-09-01

    Full Text Available É apresentada a descrição de Austinixa bragantina sp. nov., encontrada no litoral paraense em associação com os calianassídeos Lepidophthalmus siriboia Felder & Rodrigues, 1993 and Callichirus major (Say, 1818Austinixa bragantina sp. nov., found in Pará coast associated with the Callianassid Lepidophthalmus siriboia Felder & Rodrigues, 1993 and Callichirus major (Say, 1818, is described.

  16. Caminhoneiros de rota curta e sua vulnerabilidade ao HIV, Santos, SP Vulnerability to HIV and AIDS of short distance truck drivers stationed, Brazil

    Directory of Open Access Journals (Sweden)

    Luciana Villarinho

    2002-08-01

    Full Text Available OBJETIVO: Descrever a vulnerabilidade, de caminhoneiros de rota curta, à transmissão sexual do HIV e da Aids. MÉTODOS: Foram entrevistados 279 caminhoneiros com vínculo de trabalho na cidade de Santos, SP, em locais de concentração na área portuária e suas proximidades, sindicatos e associações, recrutados pela amostragem do tipo "bola-de-neve". Foram realizadas entrevistas utilizando perguntas abertas e fechadas sobre questões sociodemográficas, práticas sexuais, uso de drogas, conhecimento sobre o HIV e a Aids, contato prévio com programas de prevenção à Aids em Santos, percepção de sua vulnerabilidade ao HIV e à Aids. Foi realizada análise descritiva da amostra, e apresentados relatos para ilustrar algumas situações de vulnerabilidade. RESULTADOS: Do total de 279 caminhoneiros entrevistados, 93% declararam ter parceira fixa, 40% referiram manter relações sexuais com parceiras casuais, e 19% referiram manter relações sexuais com parceiras freqüentes. A principal situação de vulnerabilidade ao HIV ocorre devido ao uso inconsistente do preservativo, interligado ao vínculo estabelecido com cada parceira. O tempo fora de casa parece não ser o principal fator para situações de vulnerabilidade, conforme demonstram estudos com caminhoneiros de rota longa. CONCLUSÕES: A cultura "machista" e os papéis tradicionais masculinos são emblemáticos entre os caminhoneiros de rota curta. Certamente é necessário investir mais na prevenção nessa categoria profissional. A prevenção em locais de trabalho parece promissora, pois permite entender melhor seu universo, propiciando intervenções educativas adequadas a essa categoria profissional.OBJECTIVE: To describe the vulnerability to sexually transmitted HIV/AIDS of short distance truck drivers. METHODS: Using a snowball sampling procedure, 279 truck drivers working in the port area and vicinities, unions and workers' associations of Santos, Brazil, were selected and

  17. The ichthyofauna of drifting macrophyte mats in the Ivinhema River, upper Paraná River basin, Brazil

    Science.gov (United States)

    Bulla, C. K.; Gomes, Luiz Carlos; Miranda, Leandro E.; Agostinho, A. A.

    2011-01-01

    We describe the fish assemblages associated with drifting macrophyte mats and consider their possible role as dispersal vectors in the Ivinhema River, a major tributary of the upper Paraná River, Brazil. Fish associated with drifting mats were sampled in the main river channel during January and March 2005, when the wind and/or the increased water level were sufficient to transport macrophyte stands. Fish in the drifting mats were sampled with a floating sieve (4 m long x 2 m wide x 0.6 m high, and 2 mm mesh size). In the laboratory, larvae, juvenile, and adult fish were counted and identified to the lowest possible taxonomic level. In four drifting macrophyte mats we captured 218 individuals belonging to at least 28 species, 17 families, and 6 orders. Aphyocharax dentatus, Serrasalmus spp., and Trachelyopterus galeatus were the most abundant taxa associated with the mats, but species richness ranged from 6 to 24 species per mat. In addition, 85% of the total number of individuals caught was larvae and juveniles. Although preliminary and based on limited samples, this study of drifting macrophyte mats was the first one in the last unregulated stretch of the Paraná River remaining inside Brazilian territory, and alerts us to the potential role of macrophytes mats as dispersers of fish species in the region.

  18. Geochemical characterization in karst basin tributaries of the San Franciscan depression: The Corrente River, western Bahia, NE-Brazil

    Science.gov (United States)

    Lecomte, Karina L.; Bicalho, Cristina C.; Silva-Filho, Emmanoel V.

    2016-08-01

    Karst aquifers are important freshwater resources for the growing population in Brazil. The sandstones of Urucuia plateau and the limestone of Bambui Group constitute important aquifer systems in the western part of Bahia state. The Corrente River provides ∼30% of the total water flow of the São Francisco River and crosses karstified structures. Surface and groundwater samples were collected during the dry period, the beginning of the wet season, and the wet season. The main objective was to define sources and distribution of dissolved elements and to describe the geochemical processes that govern their mobility within the system. Water samples are classified into three groups, depending on the dominant weathering process. When carbonate dissolution governs, waters are bicarbonate-calcium-type; whereas when the atmospheric precipitation signal is present, the samples in siliciclastic terrain are more Cl- - Na+. Groundwaters reflect bicarbonate-mixed-type, with the highest dissolved concentrations. In contrast to the major elements, trace elements, including Rare Earth Elements (REE), show seasonal behavior: their concentrations increase with the beginning of the wet season, due to re-mobilization and release into the solution of adsorbed elements from the system and the atmospheric dust. The total dissolved REE concentration (800-7500 ng L-1) is one order of magnitude more concentrated in karsts than in siliciclastic rocks. Principal component analysis was performed, explaining >77% of the variance. First factor extracted (REE, Y, Th, Al, Fe) explain the washout and enhancement of atmospheric dust weathering throughout the beginning of the wet seasons. The second component comprises variables related to karsts lithology, representing calcite and dolomite dissolution.

  19. The subfamily Mendesellinae (Hymenoptera: Braconidae) in Brazil, with the description of six new species.

    Science.gov (United States)

    Bortoni, Marco Aurélio; Souza-Gessner, Carolina DA Silva; Penteado-Dias, Angélica Maria

    2016-11-29

    In this paper, we study the Mendesellinae wasps from Brazil deposited at Departamento de Ecologia e Biologia Evolutiva da Universidade Federal de São Carlos, São Carlos, SP, Brazil collection. Two new species of Epsilogaster (E. masoni sp. n. and E. whitfieldi sp. n.) and four new species of Mendesella (M. albipleura sp. n., M. itatiaia sp. n., M. japi sp. n., M. yamadai sp. n.) are described and illustrated.

  20. Estudo da ocorrência de enteroparasitas em hortaliças comercializadas na região metropolitana de São Paulo - SP, Brasil: II - Pesquisa de protozoários intestinais Study of the occurrence of intestinal parasites os vegetables comercially traded in the metropolitan area of S.Paulo, SP - Brazil: II - Research into protozoan cysts

    Directory of Open Access Journals (Sweden)

    Carlos Augusto Fernandes de Oliveira

    1992-10-01

    Full Text Available Foram analisadas hortaliças "in natura", comercializadas na Região Metropolitana de São Paulo, SP-Brasil, visando à pesquisa e à identificação de cistos de protozoários de interesse médico. As hortaliças, constituídas de 50 amostras de cada variedade, consistiram em: alface (Lactuca sativa, variedades lisa e crespa, escarola (Chichorium sp e agrião (Nasturtium officinale. Os resultados evidenciaram elevados percentuais de contaminação em todas as variedades de hortaliças analisadas, porém as freqüências de protozoários foram maiores no agrião. As amostras de alfaces apresentaram os menores percentuais de contaminação, enquanto que a escarola apresentou valores geralmente situados entre o agrião e as alfaces. Observou-se uma grande variedade de protozoários, cujas freqüências de ocorrência na população residente na Região Metropolitana de São Paulo são igualmente elevadas. Os mais freqüentes foram Entamoeba sp (com 4 e 8 núcleos e Giardia sp. Foram também isolados cistos de Iodamoeba sp, Endolimax sp e Chilomastix sp. Os elevados níveis de contaminação fecal encontrados nas amostras analisadas apontam para a importância dos alimentos na transmissão de protozoários intestinais.Vegetables in natura , commercially traded in the metropolitan area of S.Paulo, Brazil, were analised by means of the appropriate methodology with a view to discovering and identifying protozoan cysts of medical interest. The vegetables under study consisted of 50 samples of each of the variaties listed bel ow: lettuce (Lactuca sativa - oily leaves and crisphead varieties, endive (Chicorium sp and water-cress (Nasturtium officinale. Results showed high rates of contamination in all the varieties of vegetable analysed. However, the water-cress was the one which presented the highest frequencies of enteroparasites. Both the oily leafes and crisphead varieties of lettuce presented the lowest rates of contamination, whereas endive

  1. Dispersal syndromes of fossil seeds from the Lower Permian of Paraná Basin, Rio Grande do Sul, Brazil.

    Science.gov (United States)

    Souza, Juliane M; Iannuzzi, Roberto

    2012-03-01

    The morphological analysis of seeds has been an important subject in modern ecological studies, once it provides evidence about the biology and adaptations of the parent plant. However, this kind of study has been restricted to the ecology of modern plants and is rarely used in interpretations of Paleozoic data. From the understanding of dispersal syndromes analysis as an important tool to paleoecological reconstruction, this study provides a first approach using this tool with seeds from the Lower Permian strata of southern Paraná Basin in Rio Grande do Sul. Based on previously classified seeds and using their biological and taphonomic data, the syndrome of dispersal was interpreted, and their placement in successional groups (pioneer, early-successional and later-successional) was suggested. Seven morphospecies were analyzed: Samaropsis gigas, representing a later-successional species living in water bodies with hydrochory as its dispersal syndrome; Samaropsis kurtzii, typical of early-successional species showing anemochory as its dispersal syndrome and living in distal areas in relation to water bodies; Samaropsis aff. S. millaniana, Cordaicarpus aff. C. brasilianus, Cordaicarpus cerronegrensis and Cordaicarpus truncata have typical characteristics of pioneer plants, exhibiting barochory as their primary dispersal syndrome with other syndromes associated.

  2. Upper Cretaceous bioturbated fine-to-medium sands: A problem for deep-water exploration in Campos Basin, Offshore Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Carminatti, M.; Zimmermann, L.; Jahnert, R.; Pontes, C.

    1996-08-01

    The presence of bioturbation in oil-prone turbidite deposits has detained a better exploration of upper Cretaceous siliciclastic reservoirs in Campos Basin. Bioturbated sandstones have degraded their permo-porosity with impact in oil production. They occur associated to unbioturbated sandstones with similar seismic amplitude, becoming difficult to separate them in seismic mapping. A comprehensive study in order to reduce the exploratory risk must consider firstly the recognition of genetic facies association through cores, and secondly the calibration of sonic well-logs and seismic velocity sections with rock data. This study deals with sedimentary facies association. The range of main facies in such reservoirs includes: (1) medium-to-coarse siliciclastic sandstone with cross stratification; (2) fine-to-medium massive sandstone with thin traction carpets, bioturbated by opportunistic ichnofabrics and, (3) bioturbated, muddy, fine-to-medium, quartz-feldspatic and glauconitic sandstone over 60 in thick. The genetic facies associations suggest that the sandwich reservoirs were formed by high density turbidite currents deposited en masse or by thin traction carpets. The bioturbated sandstone was originated by reworking of bottom currents rich in nutrients and oxygen. Detritic and biogenic glauconite covered and/or filled bioturbations indicate a basinward movement of the bottom currents. The successive alternation of high-energy with low-energy ichnofabrics reflects cyclic variations in current velocities.

  3. Rationalization of the electric power consumption by recycling of residential solid wastes from the formal and informal collection at the Campinas city, Sao Paulo, Brazil; Racionalizacao do consumo de energia eletrica com a reciclagem dos residuos solidos domiciliares provenientes da coleta formal e informal no municipio de Campinas - SP

    Energy Technology Data Exchange (ETDEWEB)

    Streb, Cleci Schalemberger; Piunti, Regina Celia; Silva, Ennio Peres da; Barbosa, Sonia [Universidade Estadual de Campinas, SP (Brazil). Faculdade de Engenharia Mecanica. Programa de Planejamento de Sistemas Energeticos]. E-mail: streb@fem.unicamp.br

    2002-07-01

    This paper evaluates the potential of residues collection in Campinas, SP, Brazil, taking into account the data of informal collection. The paper also estimates the role played by paper, glass, plastic and aluminium recycling, in terms of electric power use avoiding or saving.

  4. Continental within-plate Lower Cretaceous basalts in the Campos basin, SE Brazil: compilation of data and petrogenesis; Basaltos continentais do cretaceo inferior da bacia de Campos, SE do Brasil: compilacao de dados e petrogenese

    Energy Technology Data Exchange (ETDEWEB)

    Lobo, Janaina Teixeira [Rede de Estudos em Geotectonica (PETROBRAS/CENPES/UERJ), Rio de Janeiro, RJ (Brazil)], email: janaina.lobo@uerj.br; Duarte, Beatriz Paschoal [Universidade do Estado do Rio de Janeiro (TEKTOS/FGEL/UERJ), Rio de Janeiro, RJ (Brazil). Grupo de Pesquisa em Geotectonica], email: biapasch@uerj.br; Szatmari, Peter [Petroleo Brasileiro S.A. (CENPES/PETROBRAS), Rio de Janeiro, RJ (Brazil). Centro de Pesquisas e Desenvolvimento Leopoldo Americo Miguez de Mello], email: szatmari@cenpes.petrobras.com.br; Valente, Sergio de Castro [Universidade Federal Rural do Rio de Janeiro (UFRRJ), Seropedica, RJ (Brazil). Grupo de Estudos em Petrologia], email: sergio@ufrj.br

    2007-06-15

    Continental within-plate Lower Cretaceous basalts in the Campos basin, SE Brazil: compilation of data and petrogenesis. This paper presents geochemical data and discusses, on a quantitative basis, petrogenetic models of the process by which the basalts of the Campos basin, SE Brazil, evolved in their magma chamber. Geochemical data were selected from the literature (Fodor and Vetter 1984 e Mizusaki et al. 1992). In the compilation of these data we observed the following criteria: sum of oxides are in the 99 - 101 wt.% interval; ignition losses are low; CIPW norm is in the tholeiitic range (hypersthene normative for all samples). Quantitative geochemical modeling and statistical methods does not allow us to derive the Campos basalts by the solitary activity of a single process such as fractional crystallization, magma mixing, or simple assimilation. Rather, the proposed model, supported by isotopic data, points to an evolutionary process consisting of assimilation concomitant with fractional crystallization (AFC). The early Cretaceous basalts of the Campos basin evolved by about 30% AFC, involving crystallization of an assembly made up essentially of 5% of olivine, 30% of clinopyroxene, and 65% of plagioclase in a magma chamber contained within the lower crust. Local involvement of the lower crust in the evolutionary process of the Campos basalts is supported by the pronounced negative anomaly of Nb (La / Nb{sub N} up to 5.30) detected mainly in the most evolved members. (author)

  5. A prevalent alpha-proteobacterium Paracoccus sp. in a population of the Cayenne ticks (Amblyomma cajennense) from Rio de Janeiro, Brazil

    OpenAIRE

    Erik Machado-Ferreira; Joseph Piesman; Zeidner, Nordin S; Soares, Carlos A.G.

    2012-01-01

    As Rocky Mountain Spotted Fever is the most common tick-borne disease in South America, the presence of Rickettsia sp. in Amblyomma ticks is a possible indication of its endemicity in certain geographic regions. In the present work, bacterial DNA sequences related to Rickettsia amblyommii genes in A. dubitatum ticks, collected in the Brazilian state of Mato Grosso, were discovered. Simultaneously, Paracoccus sp. was detected in aproximately 77% of A. cajennense specimens collected in Rio de J...

  6. The diversity and extracellular enzymatic activities of yeasts isolated from water tanks of Vriesea minarum, an endangered bromeliad species in Brazil, and the description of Occultifur brasiliensis f.a., sp. nov.

    Science.gov (United States)

    Gomes, Fátima C O; Safar, Silvana V B; Marques, Andrea R; Medeiros, Adriana O; Santos, Ana Raquel O; Carvalho, Cláudia; Lachance, Marc-André; Sampaio, José Paulo; Rosa, Carlos A

    2015-02-01

    The diversity of yeast species collected from the bromeliad tanks of Vriesea minarum, an endangered bromeliad species, and their ability to produce extracellular enzymes were studied. Water samples were collected from 30 tanks of bromeliads living in a rupestrian field site located at Serrada Piedade, Minas Gerais state, Brazil, during both the dry and rainy seasons. Thirty-six species were isolated, representing 22 basidiomycetous and 14 ascomycetous species. Occultifur sp., Cryptococcus podzolicus and Cryptococcus sp. 1 were the prevalent basidiomycetous species. The yeast-like fungus from the order Myriangiales, Candida silvae and Aureobasidium pullulans were the most frequent ascomycetous species. The diversity of the yeast communities obtained between seasons was not significantly different, but the yeast composition per bromeliad was different between seasons. These results suggest that there is significant spatial heterogeneity in the composition of populations of the yeast communities within bromeliad tanks, independent of the season. Among the 352 yeast isolates tested, 282 showed at least one enzymatic activity. Protease activity was the most widely expressed extracellular enzymatic activity, followed by xylanase, amylase, pectinase and cellulase activities. These enzymes may increase the carbon and nitrogen availability for the microbial food web in the bromeliad tank of V. minarum. Sequence analyses revealed the existence of 10 new species, indicating that bromeliad tanks are important sources of new yeasts. The novel species Occultifur brasiliensis, f.a., sp. nov., is proposed to accommodate the most frequently isolated yeast associated with V. minarum. The type strain of O. brasiliensis, f.a., sp. nov. is UFMG-CM-Y375(T) (= CBS 12687(T)). The Mycobank number is MB 809816.

  7. A new species of Scymnobius Casey (Coleoptera, Coccinellidae, Scymnini from Pernambuco, Brazil

    Directory of Open Access Journals (Sweden)

    José Adriano Giorgi

    2014-12-01

    Full Text Available A new species of Scymnobius Casey (Coleoptera, Coccinellidae, Scymnini from Pernambuco, Brazil. Scymnobius pernambucensis sp. nov. from Pernambuco, Brazil, is described and illustrated. This is the third species of this genus recorded from Brazil.

  8. 2 D seismic sections interpretation for the Xareu field in the Mundau sub-basin (Ceara basin, Northeastern Brazil); Interpretacao de secoes sismicas 2D para o Campo de Xareu na sub-bacia de Mundau (Bacia do Ceara, NE do Brasil)

    Energy Technology Data Exchange (ETDEWEB)

    Antunes, Alex Francisco [Rio Grande do Norte Univ., Natal, RN (Brazil)]. E-mail: alex@geologia.ufrn.br; Jardim de Sa, Emanuel Ferraz [Rio Grande do Norte Univ., Natal, RN (Brazil). Programa de Pos-graduacao em Geodinamica e Geofisica; Matos, Renato Marcos Darros de [Rio Grande do Norte Univ., Natal, RN (Brazil). Dept. de Geologia; Keller Filho, Odilon [PETROBRAS S.A., Natal, RN (Brazil). Unidade de Negocios RN/CE; Lima Neto, Francisco Fontes [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil). Centro de Pesquisas

    2003-07-01

    This paper presents a reinterpretation of seismic sections of the Xareu Oil Field, located in the central portion of the Mundau Sub-basin (Ceara Basin, Northeast Brazil). These seismic sections were acquired during the 80's and the 90's. Their reinterpretation show that the field is structured by a main arrangement of N W-trending listric normal faults, with associated roll-over structures affecting the rocks of the rift (Mundau Formation) and transitional (Paracuru Formation) sections of the basin. Some of these faults also affect the basal and intermediate layers of the drift section (Ubarana Formation), what denotes their reactivation (or even the formation of new faults). the new interpretation allows a better understanding of the frequency, geometry, orientation, style and kinematic of the faults, important factors in the structural characterization of the Xareu Oil Field. (author)

  9. El-Niño southern oscillation and rainfall erosivity in the headwater region of the Grande River Basin, Southeast Brazil

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    C. R. Mello

    2011-12-01

    Full Text Available Relationships between regional climate and oceanic and atmospheric anomalies are important tools in order to promote the development of models for predicting rainfall erosivity, especially in regions with substantial intra-annual variability in the rainfall regime. In this context, this work aimed to analyze the rainfall erosivity in headwaters of Grande River Basin, Southern Minas Gerais State, Brazil. This study considered the two most representative environments, the Mantiqueira Range (MR and Plateau of Southern Minas Gerais (PSM. These areas are affected by the El Nino Southern Oscillation (ENSO indicators Sea Surface Temperature (SST for Niño 3.4 Region and Multivariate ENSO Index (MEI. Rainfall erosivity was calculated for individual rainfall events from January 2006 to December 2010. The analyses were conducted using the monthly data of ENSO indicators and the following rainfall variables: rainfall erosivity (EI30, rainfall depth (P, erosive rainfall depth (E, number of rainfall events (NRE, number of erosive rainfall events (NEE, frequency of occurrence of an early rainfall pattern (EP, occurrence of late rainfall pattern (LP and occurrence of intermediate rainfall patter (IP. Pearson's coefficient of correlation was used to evaluate the relationships between the rainfall variables and SST and MEI. The coefficients of correlation were significant for SST in the PSM sub-region. Correlations between the rainfall variables and negative oscillations of SST were also significant, especially in the MR sub-region, however, the Person's coefficients were lesser than those obtained for the SST positive oscillations. The correlations between the rainfall variables and MEI were also significant but lesser than the SST correlations. These results demonstrate that SST positive oscillations play a more important role in rainfall erosivity, meaning they were more influenced by El-Niño episodes. Also, these results have shown

  10. Coal petrology of coal seams from the Leao-Butia Coalfield, Lower Permian of the Parana Basin, Brazil - Implications for coal facies interpretations

    Energy Technology Data Exchange (ETDEWEB)

    Silva, M.B. [Laboratorio de Oceanografia Geologica, Departamento de Geociencias, Fundacao Universidade Federal do Rio Grande, FURG, Av. Italia km 08, Campus Carreiros, 96201-900, Rio Grande, RS (Brazil); Kalkreuth, W.; Holz, M. [Instituto de Geociencias, UFRGS, Av. Bento Goncalves, 9500 91501-970 Porto Alegre, RS (Brazil)

    2008-02-01

    In the Leao-Butia Coalfield, Rio Grande do Sul the coal seams occur in the Rio Bonito Formation, Guata Group, Tubarao Supergroup of the Parana Basin, Brazil and are of Permian (Artinskian-Kungurian) age. This study is the first detailed investigation on the coal petrographic characterization of the coal-bearing sequence in relation to the depositional settings of the precursor mires, both in terms of whole seam characterization and in-seam variations. The study is based on the analyses of nine coal seams (I2, CI, L4, L3, L2, L1, S3, S2, S1), which were selected from core of borehole D-193, Leao-Butia and represent the entire coal-bearing sequence. The interpretation of coal facies and depositional environment is based on lithotype, maceral and microlithotype analyses using different facies-critical petrographic indices, which were displayed in coal facies diagrams. The seams are characterized by the predominance of dull lithotypes (dull, banded dull). The dullness of the coal is attributed to relatively high mineral matter, inertinite and liptinite contents. The petrographic composition is dominated by vitrinite (28-70 vol.% mmf) and inertinite (> 30 vol.% mmf) groups. Liptinite contents range from 7 to 30 vol.% (mmf) and mineral matter from 4-30 vol.%. Microlithotypes associations are dominated by vitrite, duroclarite, carbominerite and inertite. It is suggested that the observed vertical variations in petrographic characteristics (lithotypes, microlithotypes, macerals, vitrinite reflectance) were controlled by groundwater level fluctuations in the ancient mires due to different accommodation/peat accumulation rates. Correlation of the borehole strata with the general sequence-stratigraphical setting suggests that the alluvial fan system and the coal-bearing mudstone succession are linked to a late transgressive systems tract of sequence 2. Based on average compositional values obtained from coal facies diagrams, a deposition in a limno-telmatic to limnic coal

  11. Kaolinite, illite and quartz dissolution in the karstification of Paleozoic sandstones of the Furnas Formation, Paraná Basin, Southern Brazil

    Science.gov (United States)

    Melo, Mário Sérgio de; Guimarães, Gilson Burigo; Chinelatto, Adilson Luiz; Giannini, Paulo César Fonseca; Pontes, Henrique Simão; Chinelatto, Adriana Scoton Antonio; Atencio, Daniel

    2015-11-01

    Karstification processes in sandstones of the Furnas Formation, Silurian to Devonian of the Paraná Basin, have been described since the mid-twentieth century. However, some geologists still doubt the idea of true karst in sandstones. Studies carried out in the Campos Gerais region, Paraná State, Southern Brazil, aimed at investigating the nature of erosion processes in Furnas Formation and the role of the dissolution in the development of their notorious erosive features and underground cavities. These studies have led to the recognition of dissolution macro to micro features ('furnas', caves, ponds, sinks, ruiniform relief on cliffs and rocky surfaces, grain corrosion, speleothems, mineral reprecipitation and incrustation). The analysis (scanning electron microscopy, energy dispersive spectrometry and x-ray diffractometry) of sandstones and their alterites has indicated significant dissolution of clay cement along with discrete quartz grain dissolution. This mesodiagenetic cement (kaolinite and illite) is dissolved and reprecipitated as clay minerals with poorly developed crystallinity along with other minerals, such as variscite and minerals of the alunite supergroup, suggesting organic participation in the processes of dissolution and incrustation. The mineral reprecipitation usually forms centimetric speleothems, found in cavities and sheltered rocky surfaces. The cement dissolution associated with other factors (fractures, wet weather, strong hydraulic gradient, antiquity of the landforms) leads to the rock arenisation, the underground erosion and the appearance of the karst features. Carbonate rocks in the basement may locally be increasing the karst forms in the overlying Furnas Formation. The recognition of the karst character of the Furnas Formation sandstones has important implications in the management of underground water resources (increasingly exploited in the region), in the use of the unique geological heritage and in the prevention of geo

  12. Two new species of Hyphessobrycon (Teleostei: Characidae from upper rio Tapajós basin on Chapada dos Parecis, central Brazil

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    Tiago Pinto Carvalho

    2006-09-01

    Full Text Available Two new species of Hyphessobrycon are described from the upper rio Tapajós basin, Mato Grosso, Brazil. Hyphessobrycon melanostichos is distinguished from its congeners by the combination of a conspicuous longitudinal broad black band beginning on the posterior margin of orbit and reaching the tip of middle caudal fin rays, a distinct vertically elongate humeral spot, and 16 to 18 branched anal-fin rays. Hyphessobrycon notidanos is distinguished from its congeners by the combination of an elongate dorsal fin in mature males, a vertically elongate humeral spot, 2-4 maxillary teeth, iii,8 dorsal-fin rays, and 16 to 21 branched anal-fin rays.Duas novas espécies do gênero Hyphessobrycon são descritas para a bacia do alto rio Tapajós, Mato Grosso, Brasil. Hyphessobrycon melanostichos distingue-se de seus congêneres pela combinação da presença de uma banda preta longitudinal larga entre a margem posterior da órbita até a ponta dos raios medianos da nadadeira caudal, de uma mancha umeral verticalmente alongada, e de 16 a 18 raios ramificados na nadadeira anal. Hyphessobrycon notidanos distingue-se de seus congêneres pela combinação da presença da nadadeira dorsal alongada nos machos maduros, de uma mancha umeral verticalmente alongada, 2-4 dentes no maxilar, iii,8 raios na nadadeira dorsal e 16 a 21 raios ramificados na nadadeira anal.

  13. The role of gravitational collapse in controlling the evolution of crestal fault systems (Espírito Santo Basin, SE Brazil)

    Science.gov (United States)

    Ze, Tao; Alves, Tiago M.

    2016-11-01

    A high-quality 3D seismic volume from offshore Espírito Santo Basin (SE Brazil) is used to assess the importance of gravitational collapse to the formation of crestal faults above salt structures. A crestal fault system is imaged in detail using seismic attributes such as curvature and variance, which are later complemented by analyses of throw vs. distance (T-D) and throw vs. depth (T-Z). In the study area, crestal faults comprise closely spaced arrays and are bounded by large listric faults, herein called border faults. Two episodes of growth are identified in two opposite-dipping fault families separated by a transverse accommodation zone. Statistical analyses for eighty-four (84) faults show that fault spacing is faults showing the larger throw values. Fault throw varies between 8 ms and 80 ms two-way time for crestal faults, and 60-80 ms two-way time for border faults. Fault length varies between ∼410 m and 1750 m, with border faults ranging from 1250 m to 1750 m. This work shows that border faults accommodated most of the strain associated with salt growth and collapse. The growth history of crestal faults favours an isolated fault propagation model with fault segment linkage being associated with the lateral propagation of discrete fault segments. Importantly, two episodes of fault growth are identified as synchronous to two phases of seafloor erosion, rendering local unconformities as competent markers of fault reactivation at a local scale. This paper has crucial implications for the understanding of fault growth as a means to assess drilling risk and oil and gas migration on continental margins. As a corollary, this work demonstrates that: 1) a certain degree of spatial organisation occurs in crestal fault systems; 2) transverse accommodation zones can form regions in which fault propagation is enhanced and regional dips of faults change in 4D.

  14. Geostatistical and stratigraphic analysis of deltaic reservoirs from the Reconcavo Basin, Brazil; Analise estratigrafica e geoestatistica de reservatorios deltaicos da Bacia do Reconcavo (BA)

    Energy Technology Data Exchange (ETDEWEB)

    Soares, Carlos Moreira

    1997-07-01

    This study presents the characterization of the external geometry of deltaic oil reservoirs, including the description of their areal distribution using geo statistic tools, such as variography and kriging. A high-resolution stratigraphic study was developed over a 25 km{sup 2} area, by using data from 276 closely-spaced wells of an oil-producer field from the Reconcavo Basin, northeastern Brazil. The studied succession records the progressive lacustrine transgression of a deltaic environment. Core data and stratigraphic cross sections suggest that the oil reservoirs are mostly amalgamated, delta-front lobes, and subordinately, crevasse deposits. Some important geometrical elements were recognized by the detailed variographic analysis developed for each stratigraphic unit (zone). The average width for the groups of deltaic lobes of one zone was measured from the variographic feature informally named as hole effect. This procedure was not possible for the other zones due to the intense lateral amalgamation of sandstones, indicated by many variographic nested structures. Net sand krigged maps for the main zones suggest a NNW-SSE orientation for the deltaic lobes, as also their common amalgamation and compensation arrangements. High-resolution stratigraphic analyses should include a more regional characterization of the depositional system that comprises the studied succession. On the other hand, geostatistical studies should be developed only after the recognition of the depositional processes acting in the study area and the geological meaning of the variable to be treated, including its spatial variability scales as a function of sand body thickness, orientation and amalgamation. (author)

  15. Genetic variability in Astyanax altiparanae Garutti & Britski, 2000 (Teleostei, Characidae from the Upper Paraná River basin, Brazil

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    Maria Dolores Peres

    2005-12-01

    Full Text Available Allozyme data was used to assess the genetic diversity Astyanax altiparanae populations from the floodplain of the Upper Paraná River (PR. Specimens were collected in the southern Brazilian state of Paraná from PR in Porto Rico municipality and Ribeirão Ficha (RF in Ubiratã municipality. The authors used 15% (w/v corn starch gel electrophoresis to identify 21 putative loci for 13 enzymatic systems: Aspartate aminotransferase, 2.6.1.1 (AAT, Acid phosphatase, 3.1.3.2 (ACP, Esterase, 3.1.1.1 (EST, Glycerol-3-phosphate dehydrogenase, 1.1.1.8 (G3PDH, Glucose-6-phosphate dehydrogenase, 1.1.1.49 (G6PDH, Glucose-6-phosphate isomerase, 5.3.1.9 (GPI, Iditol dehydrogenase, 1.1.1.14 (IDDH, Isocitrate dehydrogenase - NADP+, 1.1.1.42 (IDH, L-Lactate dehydrogenase, 1.1.1.27 (LDH, Malate dehydrogenase, 1.1.1.37 (MDH, Malate dehydrogenase - NADP+, 1.1.1.40 (MDHP, Phosphoglucomutase, 5.4.2.2 (PGM, and Superoxide dismutase, 1.15.1.1 (SOD. The proportion of polymorphic loci were estimated as 52.38% in the PR population and 38.10% in the RF population. Expected estimated heterozygosities were 0.1518 ± 0.0493 for the PR population and 0.0905 ± 0.0464 for the RF population. The A. altiparanae heterozygosity data were similar to previous estimates for other PR basin characid species. Allele frequencies were significantly different between the PR and RF populations in respect to some loci (Acp-1, G3pdh-1, Gpi-A, Iddh-1, Mdhp-1 and Mdhp-2. Wright’s statistics for all loci were estimated as Fis = 0.3919, Fit = 0.4804 and Fst = 0.1455. Our results show that the A. altiparanae populations studied are genetically different and have a high degree of genetic variability.

  16. Antimicrobial susceptibility of Campylobacter sp strains isolated from calves with and without diarrhea in Minas Gerais state, Brazil Susceptibilidade a antimicrobianos de amostras de Campylobacter sp isoladas de bezerros com e sem diarréia, no estado de Minas Gerais, Brasil

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    Karina Leite Miranda

    2007-06-01

    Full Text Available The antimicrobial susceptibility of 25 Campylobacter sp strains isolated from calves with and without diarrhea - 7 C. coli, 16 C. fetus and 2 C. jejuni was studied by the disk diffusion method. Eleven antimicrobial agents were tested amikacin, ampicillin, kanamycin, chloramphenicol, erythromycin, gentamicin, neomycin, nitrofurantoin, penicillin G, tetracycline and sulfamethoxazole-trimethoprim. All Campylobacter sp strains were susceptible to amikacin, ampicillin, chloramphenicol, erythromycin, gentamicin, neomycin and nitrofurantoin. Three strains were moderately susceptible to kanamycin (2 C. coli and 1 C. fetus. All the strains were resistant to penicillin G. Two C. fetus strains were moderately susceptible to sulfamethoxazole-trimethoprim and 1 C. coli, 9 C. fetus and 2 C. jejuni strains were resistant. Two C. fetus strains were moderately susceptible to tetracycline and 3 C. coli, 2 C. fetus and 1 C. jejuni strains were resistant. Eleven strains showed multidrug resistance (2 C. coli, 8 C. fetus and 1 C. jejuni. There was no correlation between resistance of Campylobacter sp strains to antimicrobials and the occurrence of diarrhea in calves. The frequency of resistance and, most importantly, multi drug resistance found among Campylobacter sp strains isolated from calves in Minas Gerais, Brazil, were high and the patterns of resistance observed are related to the antimicrobials agents most largely used in cattle in Brazil.Foi estudado o perfil de susceptibilidade aos antimicrobianos de 25 amostras de Campylobacter sp isoladas de bezerros com e sem diarréia (7 C. coli, 16 C. fetus e 2 C. jejuni. Foram testados pelo método de difusão 11 agentes antimicrobianos: amicacina, ampicilina, canamicina, cloranfenicol, eritromicina, gentamicina, neomicina, nitrofurantoína, penicilina G, tetraciclina e sulfametoxazole-trimetoprim. Todas as amostras de Campylobacter sp foram susceptíveis a amicacina, ampicilina, cloranfenicol, eritromicina

  17. Morphological and hematological studies of Trypanosoma spp. infecting ornamental armored catfish from Guamá River-PA, Brazil.

    Science.gov (United States)

    Fujimoto, Rodrigo Y; Neves, Mikaelle S; Santos, Rudã F B; Souza, Natalino C; Do Couto, Márcia V S; Lopes, Josiane N S; Diniz, Daniel G; Eiras, Jorge C

    2013-09-01

    A total of 281 specimens of freshwater armored ornamental fish species (Leporacanthicus galaxias,Lasiancistrus saetiger, Cochliodon sp., Hypostomus sp., Pseudacanthicus spinosus, Ancistrus sp. and Rineloricaria cf. lanceolata) were captured at the hydrological basin of Guamá River, Pará, Brazil. The infection by Trypanosoma spp. was inspected. The morphological and morphometric characterization of the parasites and the hematological parameters were determined. Leporacanthicus galaxias and Pseudacanthicus spinosus presented 100% infection prevalence, and the other species showed a variable prevalence of infection. The parasites showed clearly different morphotypes and dimensions, and probably belong to different species. The hematological response to the infection varied with the host. Cochliodon sp. showed no differences between infected and not infected fish. In other species several modifications on some hematological parameters were found, but apparently without causing disease. It is emphasized the possibility of introduction of the parasites in new environments due to the artificial movements of these ornamental fish.

  18. Morphological and hematological studies of Trypanosoma spp. infecting ornamental armored catfish from Guamá River-PA, Brazil

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    Rodrigo Y. Fujimoto

    2013-09-01

    Full Text Available A total of 281 specimens of freshwater armored ornamental fish species (Leporacanthicus galaxias, Lasiancistrus saetiger, Cochliodon sp., Hypostomus sp., Pseudacanthicus spinosus, Ancistrus sp. and Rineloricaria cf. lanceolata were captured at the hydrological basin of Guamá River, Pará, Brazil. The infection by Trypanosoma spp. was inspected. The morphological and morphometric characterization of the parasites and the hematological parameters were determined. Leporacanthicus galaxias and Pseudacanthicus spinosus presented 100% infection prevalence, and the other species showed a variable prevalence of infection. The parasites showed clearly different morphotypes and dimensions, and probably belong to different species. The hematological response to the infection varied with the host. Cochliodon sp. showed no differences between infected and not infected fish. In other species several modifications on some hematological parameters were found, but apparently without causing disease. It is emphasized the possibility of introduction of the parasites in new environments due to the artificial movements of these ornamental fish.

  19. Herpetofauna of the Quaternary sand dunes of the Middle Rio São Francisco, Bahia, Brazil. VIII. Amphisbaena arda sp. nov., a fulliginosa-like checkered patterned Amphisbaena (Squamata: Amphisbaenidae.

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    Miguel Trefaut Rodrigues

    2002-01-01

    Full Text Available Amphisbaena arda sp. nov. is described based on a specimen obtained at Mocambo do Vento, on the left bank of the São Francisco river, Bahia state, Brazil. A. arda is a medium size amphisbaenian with a checkered black and white color pattern similar to the one present in the fuliginosa group but differing from that by having a lighter pigmentation, an uniformly white ventral surface, and by several other important morphological characters. A. arda is similar to Amphisbaena vermicularis in meristic characters currently used to assist amphisbaenian identification but can be separated from it by its color pattern, its flatter cephalic shields, and by the more ventral position of the nostril.

  20. Study on the Hymenoptera parasitoid associated with Lepidoptera larvae in reforestation and agrosilvopastoral systems at Fazenda Canchim (Embrapa Pecuária Sudeste) São Carlos, SP, Brazil.

    Science.gov (United States)

    Pereira, A G; Silva, R B; Dias, M M; Penteado-Dias, A M

    2015-11-01

    The aim of this study was to characterize the local fauna of Hymenoptera parasitoids associated with Lepidoptera larvae in areas of reforestation and agrosilvopastoral systems at Fazenda Canchim (Embrapa Pecuária Sudeste, São Carlos, SP, Brazil). Lepidoptera larvae collected with entomological umbrella were kept in the laboratory until emergence of adults or their parasitoids. From those collected in the agrosilvopastoral system, emerged 267 specimens of hymenopteran parasitoids belonging to 16 genera: Braconidae, Agathidinae (Alabagrus), Braconinae (Bracon), Microgastrinae (Cotesia, Diolcogaster, Glyptapanteles, Pholetesor and Protapanteles), Orgilinae (Orgilus); Ichneumonidae, Campopleginae (Casinaria, Charops and Microcharops); Chalcididae, Chalcidinae (Brachymeria and Conura); Eulophidae, Entedoninae (Horismenus), Eulophinae (Elachertus and Euplectrus). From the Lepidoptera larvae collected in the reforestation, emerged 68 specimens of hymenopteran parasitoids, belonging to 8 genera: Chalcididae, Chalcidinae (Conura); Ichneumonidae, Pimplinae (Neotheronia), Campopleginae (Charops and Microcharops) and Braconidae, Microgastrinae (Apanteles, Diolcogaster, Distatrix, Glyptapanteles and Protapanteles). The results of this study suggest the occurrence of a wide variety of Hymenoptera parasitoids in the studied environments.

  1. Evaluation of the photovoltaic systems installed in the residences of the Cardoso Island, State of Sao Paulo, Brazil; Avaliacao dos sistemas fotovoltaicos instalados nas residencias dos moradores da Ilha do Cardoso, SP, Brasil

    Energy Technology Data Exchange (ETDEWEB)

    Zilles, R.; Morante, F.; Fedrizzi, M.C. [Sao Paulo Univ., SP (Brazil). Inst. de Eletrotecnica e Energia. Lab. de Sistemas Fotovoltaicos]. E-mail: zilles@iee.usp.br

    2000-07-01

    This work reports the results of a technical evaluation of Solar Home Systems project at Parque Estadual da Ilha do Cardoso, SP, Brazil. The systems belong to the CESP's commercial program called ECOWATT, initiated in 1997. During the visit were registered 75 systems (2 churches, 4 schools and 69 houses). In some houses were done tests of charge control operation and performance. The work shows some problems at the design and at the technical standard. In our valuation, some systems should have been smaller and some bigger depending the needs and the payment capacity of each family.In this sense, a study of caicara's way of living were missing, as well as its difference at social and economic class. The results revealed that many simple aspects, but important for the exit of the project were not take into account. (author)

  2. Fiscalização de hortas produtoras de verduras do município de Ribeirão Preto, SP Monitoring of lettuce crops of Ribeirão Preto, SP, Brazil

    Directory of Open Access Journals (Sweden)

    Osvaldo M. Takayanagui

    2000-04-01

    Full Text Available O consumo de verduras cruas desempenha importante papel na transmissão de várias doenças infecciosas pela freqüente prática de irrigação de hortas com água contaminada. O objetivo deste estudo é a avaliação das condições higiênico-sanitárias de todas as hortas produtoras de verduras de Ribeirão Preto, SP com implantação de um sistema de fiscalização. A análise laboratorial de 129 hortas revelou irregularidades em 20,1% delas, destacando-se elevada concentração de coliformes fecais em 17%, presença de Salmonella em 3,1% e de vários enteroparasitas (Ascaris sp, Ancylostomidae, Strongyloides sp, Hymenolepis nana e Giardia sp em 13,1%. A repetição da análise das hortas irregulares determinou a interdição definitiva de uma delas; todas as demais foram aprovadas, comprovando a eficácia do sistema de fiscalização, particularmente com a implantação, inédita no país, do certificado de vistoria sanitária.The ingesting of raw vegetables plays an important role in the transmission of several infectious diseases due to the high frequency of irrigation with wastewater. The objective of this study was to evaluate the sanitary conditions of all lettuce producing crops in Ribeirão Preto through microbiological and parasitological analysis of both irrigation water and lettuce together with the implantation of an effective crop monitoring. Laboratory analysis of 129 crops showed irregularities in 26 (20.1% of these: high concentration of fecal coliforms in 17% of the lettuce, presence of Salmonella in 3.1% and several enteroparasites (Ascaris sp, Ancylostomidae, Strongyloides sp, Hymenolepis nana, and Giardia sp in 13.1%. Persistent irregularities determined the definitive closing down of one producer; all of the remaining 128 crops were eventually approved, thus demonstrating the efficacy of lettuce crop monitoring. Crops approved in the laboratory analysis were awarded a Sanitary Inspection Certificate - an unprecedented

  3. Taxonomic identification of the Megaloolithid egg and eggshells from the Cretaceous Bauru Basin (Minas Gerais, Brazil: comparison with the Auca Mahuevo (Argentina titanosaurid eggs

    Directory of Open Access Journals (Sweden)

    Gerald Grellet-Tinner

    2007-01-01

    Full Text Available The taxonomically (titanosaurid identified eggs and eggshells of Auca Mahuevo (Patagonia, Argentina provide an opportunity to compare and identify orphan megaloolithid eggs found elsewhere. Previous investigation determined that the oological material from Neuquén (Megaloolithus patagonicus and Peru (M. pseudomamillare are related to titanosaurid dinosaurs. Examination of an egg and several (megaloolithid eggshell fragments from the Upper Cretaceous Marilia Formation strongly suggests, as oological characters are at least genus specific, that the same group of titanosaur dinosaurs, which lived in the Neuquén Basin during the Late Campanian, were also present and reproducing in the Cretaceous Bauru Basin (Brazil. Furthermore, it has been suggested that these titanosaurs, based on the site of Auca Mahuevo, demonstrated colonial nesting and nesting fidelity. These reproductive behaviors would advocate that similar nesting sites should exist in the Upper Cretaceous formations of the Bauru Basin and remain to be discovered, as the present Peiropolis locality represents a secondary deposit where fossils have been transported by high-energy fluvial system.Os ovos e cascas de ovos provenientes de Auca Mahuevo (Patagonia, Argentina e identificados taxonomicamente como sendo de titanossaurídeos servem de base para comparação e identificação de ovos megaloolithídeos encontrados em outras localidades. Investigações prévias detreminaram que os materialis oológicos encontrados em Neuquén (Megaloolithus patagonicus e no Peru (M. pseudomamillare estão na realidade relacionados à dinossauros titanossaurídeos. O estudo de um ovo e diversos fragmentos de cascas de ovos (megaloolithídeo provenientes do Cretáceo Superior da Formação Marília sugere que o mesmo grupo taxonômico de dinossauros titanossauros que ocorria no Campaniano tardio da Bacia Neuquén também estava presente e se reproduzia durante o Cretáceo na Bacia Bauru, isto porque os

  4. Determining Regional Actual Evapotranspiration of Irrigated Crops and Natural Vegetation in the São Francisco River Basin (Brazil Using Remote Sensing and Penman-Monteith Equation

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    Antônio H. de C. Teixeira

    2010-05-01

    Full Text Available To achieve sustainable development and to ensure water availability in hydrological basins, water managers need tools to determine the actual evapotranspiration (ET on a large scale. Field energy balances from irrigated and natural ecosystems together with a net of agro-meteorological stations were used to develop two models for ET quantification at basin scale, based on the Penman-Monteith equation. The first model (PM1 uses the resistances to the latent heat fluxes estimated from satellite measurements, while the second one (PM2 is based on the ratio of ET to the reference evapotranspiration (ET0 and its relation to remote sensing parameters. The models were applied in the Low-Middle São Francisco river basin in Brazil and, after comparison against field results, showed good agreements with PM1 and PM2 explaining, respectively, 79% and 89% of the variances and mean square errors (RMSE of 0.44 and 0.34 mm d−1. Even though the PM1 model was not chosen for ET calculations, the equation for surface resistance (rs was applied to infer the soil moisture conditions in a simplified vegetation classification. The maximum values of rs were for natural vegetation—caatinga (average of 1,937 s m−1. Wine grape and mango orchard presented similar values around 130 s m−1, while table grape presented the lowest ones, averaging 74 s m−1. Petrolina and Juazeiro, in Pernambuco (PE and Bahia (BA states, respectively, were highlighted with the biggest irrigated areas. The highest increments are for vineyards and mango orchards. For the first crop the maximum increment was verified between 2003 and 2004 in Petrolina-PE, when the cultivated area increased 151%. In the case of mango orchards the most significant period was from 2005 to 2006 in Juazeiro-BA (129%. As the best performance was for PM2, it was selected and used to analyse the regional ET at daily and annual scales, making use of Landsat images and a geographic information system for different

  5. Emissões naturais e antrópicas de metais e nutrientes para a bacia inferior do rio de contas, Bahia Natural and anthropogenic emissions of metals and nutrients to the lower contas river basin, Bahia state, Brazil

    Directory of Open Access Journals (Sweden)

    Francisco C. F. de Paula

    2010-01-01

    Full Text Available Emission factors of anthropogenic activities and natural processes were used to estimate nutrients and metals loads to the Contas River lower basin, Southern Bahia, Brazil. Among natural sources, emission from soil leaching is larger for N, Cu and Pb. Atmospheric deposition is the major natural source of P, Zn, Cd and Hg. Among anthropogenic sources, agriculture is the major source of N, Cu and P. Urban sources are the major contributors to the other elements. Present anthropogenic land uses are already responsible for 78 and 99% of total N and P loads and about 50% of total Cu and Hg.

  6. Riggia acuticaudata sp. nov. (Isopoda, Cymothoidae from the body cavity of a reshwater fish of Mato Grosso do Sul State, Brazil

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    Vernon E. Thatcher

    2002-12-01

    Full Text Available Riggia acuticaudata sp. nov. is described on the basis of 10 female specimens recovered from the body cavity of the freshwater catfish, Ancistrus sp. The fish were caught in a stream called the Corrego Piraputanga, a tributary of the Paraguai River. The new species differs from the others in the genus by being smaller and less convex and by having a pleotelson that tapers abruptly rather than being the same width throughout. Also, the pereopods and dactyls are much smaller, the maxillule has two terminal and three subterminal spines and the first two pleopods are elongate and acute. Additionally, R. acuticaudata sp. nov. is from a different Order of fish host and a new geographic area.

  7. Distribuição vertical e sazonal de Anopheles (Kerteszia em Ilha Comprida, SP Vertical and seasonal distribution of Anopheles (Kerteszia in Ilha Comprida, Southeastern Brazil

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    Helene Mariko Ueno

    2007-04-01

    Full Text Available OBJETIVO: Anopheles bellator e An. cruzii são vetores da malária-bromélia, característicos de áreas preservadas. O objetivo do estudo foi analisar a distribuição sazonal e vertical desses anofelinos, visando contribuir para a avaliação do risco de transmissão desse agravo. MÉTODOS: No município de Ilha Comprida, SP, foram instaladas armadilhas luminosas tipo CDC iscadas com gelo seco, das 17 às 20h, a um, seis e 12m do solo, quinzenalmente, de setembro de 2001 a setembro de 2002. A relação da densidade desses anofelinos com o clima foi avaliada pelo coeficiente de Spearman e suas densidades entre os estratos foram comparadas pelo teste não paramétrico de Mann-Whitney. RESULTADOS: Do total de 55.226 mosquitos, 1.341 eram An. bellator (2,4% do total de Culicidae, sendo capturados 278 indivíduos próximo ao solo, 261 a seis metros e 802 na copa (12 m. Na mesma ordem, foram capturados 452, 1.032 e 4.420 adultos de An. cruzii, totalizando 5.904 mosquitos desta espécie (10,7%. Houve correlação positiva entre a densidade das duas espécies com a temperatura máxima, e entre An. bellator e amplitude térmica diária. As densidades das duas espécies foram maiores na copa. Nos três estratos, An. cruzii predominou sobre An. bellator. CONCLUSÕES: Confirmou-se o comportamento acrodendrófilo dessas espécies, principalmente An. cruzii. Após medidas drásticas de controle, esses anofelinos permaneceram na região mas, atualmente, não são alvo de vigilância entomológica. A persistência da transmissão de malária autóctone e o incremento de atividades de ecoturismo na região apontam a necessidade de monitoramento dessas espécies.OBJECTIVE: Anopheles bellator e An. cruzii are vectors of the so-called bromeliad-malaria, typical of conserved areas. The objective was to evaluate the seasonal and vertical distribution of these anophelines, aiming at assessing the risk of malaria transmission. METHODS: In the municipality of Ilha

  8. Masculinidade e vulnerabilidade ao HIV de homens heterossexuais, São Paulo, SP Masculinity and vulnerability to HIV among heterosexual men in São Paulo, Brazil

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    Iara Guerriero

    2002-08-01

    Full Text Available OBJETIVO: Identificar aspectos da masculinidade relacionados à vulnerabilidade dos homens à infecção pelo HIV. MÉTODOS: Pesquisa qualitativa realizada com homens motoristas de ônibus e integrantes de uma Comissão Interna de Prevenção de Acidentes (Cipa em uma empresa de transportes coletivos na cidade de São Paulo, SP. Foram gravadas e transcritas dez entrevistas individuais e quatro oficinas de sexo seguro. Seu conteúdo foi disposto e discutido em blocos temáticos relacionados à sexualidade, à infidelidade, ao preservativo, às doenças sexualmente transmissíveis e à Aids. RESULTADOS: São aspectos que tornam os homens mais vulneráveis: sentir-se forte, imune a doenças; ser impetuoso, correr riscos; ser incapaz de recusar uma mulher; considerar que o homem tem mais necessidade de sexo do que a mulher e de que esse desejo é incontrolável. A infidelidade masculina é considerada natural; a feminina é atribuída a deficiências do parceiro. A decisão por usar ou não camisinha é feita pelo homem; a mulher só pode solicitá-la para evitar gravidez. A não-utilização da camisinha é atribuída a: estética, alto custo, medo de perder a ereção, perda de sensibilidade no homem e na mulher. Os entrevistados não se consideram vulneráveis ao HIV nem a doenças sexualmente transmissíveis (DST e confundem suas formas de transmissão. CONCLUSÕES: A idéia de que ser homem é ser um bom provedor para a família e ter responsabilidade pode constituir um aspecto que favoreça a prevenção, já que pode levá-los a usar camisinha como contraceptivo e para não trazer doenças para casa. É importante conhecer e intervir sobre as concepções de masculinidade, não só porque elas podem contribuir para aumento da vulnerabilidade ao HIV, mas também porque podem apontar caminhos mais efetivos para a prevenção.OBJECTIVE: To identify aspects of masculinity that could be associated with vulnerability to HIV among heterosexual men

  9. Dispersal Syndromes of fossil Seeds from the Lower Permian of Paraná Basin, Rio Grande do Sul, Brazil

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    Juliane M. Souza

    2012-03-01

    Full Text Available The morphological analysis of seeds has been an important subject in modern ecological studies, once it provides evidence about the biology and adaptations of the parent plant. However, this kind of study has been restricted to the ecology of modern plants and is rarely used in interpretations of Paleozoic data. From the understanding of dispersal syndromes analysis as an important tool to paleoecological reconstruction, this study provides a first approach using this tool with seeds from the Lower Permian strata of southern Paraná Basin in Rio Grande do Sul. Based on previously classified seeds and using their biological and taphonomic data, the syndrome of dispersal was interpreted, and their placement in successional groups (pioneer, early-successional and later-successional was suggested. Seven morphospecies were analyzed: Samaropsis gigas, representing a later-successional species living in water bodies with hydrochory as its dispersal syndrome; Samaropsis kurtzii, typical of early-successional species showing anemochory as its dispersal syndrome and living in distal areas in relation to water bodies; Samaropsis aff. S. millaniana, Cordaicarpus aff. C. brasilianus, Cordaicarpus cerronegrensis and Cordaicarpus truncata have typical characteristics of pioneer plants, exhibiting barochory as their primary dispersal syndrome with other syndromes associated.A Análise morfológica das sementes tem sido um importante objeto em estudos ecológicos modernos, uma vez que fornece evidências sobre a biologia e as adaptações das plantas-mãe de sementes. Entretanto, este tipo de estudo tem sido restrito a ecologia de plantas modernas e é raramente utilizado em interpretações de dados paleozóicos. A partir do entendimento da análise das sindromes de dispersão como uma importante ferramenta para reconstruções paleoecológicas, este estudo oferece uma primeira abordagem utilizando essa ferramenta com sementes do Permiano Inferior do Sul da

  10. Detection of thermophilic Campylobacter sp. in raw chicken sausages by methods ISO 10272: 2006 in Curitiba – Parana State – Brazil

    Science.gov (United States)

    Konell, K.; Gelinsk, M.A.; Benetti, T.M.; Abrahão, W.M.

    2014-01-01

    The aim of this study was the detection of Campylobacter sp. in raw chicken sausages using the methods ISO 10272-1 and ISO 10272-2. The overall prevalence of Campylobacter sp. in the samples tested was 16.67%, representing a serious risk to the health of consumers, particularly if measures guaranteeing proper cooking of foods and prevention of cross-contamination are not adopted. Furthermore, the majority of campylobacteriosis cases in humans are caused by consumption or improper handling of contaminated raw or undercooked poultry meat, which constitute the main vehicle of this infection. PMID:25763066

  11. Strengthening Adaptation to Extreme Climate Events in Southwestern Amazonia: an Example from the Trinational Acre River Basin in the Madre de Dios/Peru - Acre/Brazil - Pando/Bolivia (MAP) Region.

    Science.gov (United States)

    Brown, I. F.

    2015-12-01

    Southwestern Amazonia, where Bolivia, Brazil and Peru meet, faces numerous challenges to the sustainable utilization of land and water resources as the region experiences rapid population and economic growth, expanding agriculture, transportation and energy sectors, along with frequent flooding and droughts. It is also predicted to be one of the most susceptible areas for climate change in the coming decade. The Acre River Basin, one of the few trinational basins in Amazonia, lies at the center of the Madre de Dios Region (Peru), Acre State (Brazil) and Pando Department (Bolivia) or MAP Region. It covers approximately 7,500 km2 and its inhabitants range from indigenous groups avoiding contact with industrial society to more than 60,000 dwellers of a binational urban center. The basin incorporates most the challenges facing the region and this paper discusses steps underway to address the basin's vulnerability to climate-related threats. A trinational group of professionals used GIS databases and local knowledge to classify these threats and possible societal responses. To prioritize threats and to propose responses, this group adapted a method proposed by the Queensland Climate Change Centre of Excellence of Australia to develop climate risk matrices for assessing impacts, adaptation, risk and vulnerability. The three priority climate variables were prolonged and more frequent droughts, more intense flooding, and more days with temperatures > 35oC. The final matrix proposed two areas of concentration - 1) Reduce the vulnerability of communities to hydro-meteorological extreme events and 2) Protect and restore ecosystems that maintain critical water-related resources with actions in public policy, capacity-building, and immediate activities. These results are being incorporated into the Amazon Project of the Global Environment Fund of the United Nations Environment Program, administered by the Amazon Cooperation Treaty Organization (ACTO).

  12. Herpetofauna of the quaternary sand dunes of the middle Rio São Francisco: Bahia: Brazil. VII.: Typhlops amoipira sp. nov., a possible relative of Typhlops yonenagae (Serpentes, Typhlopidae

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    Miguel Trefaut Rodrigues

    2002-11-01

    Full Text Available A new species of a small typhlopid snake is described from Ibiraba, in the sand- dune area of the left bank of Rio São Francisco, State of Bahia, Brazil. Typhlops amoipira sp. nov. is a small, light brown, and slightly pigmented Typhlops characterized by an incomplete nasal suture,18 scale rows around the body (SAB, and 212-242 dorsal scales. The geographic and morphologically closer species, Typhlops yonenagae (18 SAB, 259-291 dorsals lives in the same area, in the sands of the opposite side of the river.Descreve-se uma nova espécie de Typhlops de Ibiraba, no campo de dunas da margem esquerda do Rio São Francisco, Bahia, Brasil. Typhlops amoipira sp. nov. é um pequeno tiflopídeo castanho claro, pouco pigmentado, caracterizado por apresentar 18 fileiras de escamas ao redor do corpo e 212 a 242 dorsais. A espécie geográfica e morfologicamente mais próxima, Typhlops yonenagae, ocorre na mesma área, nas areias da margem oposta do rio e, embora também tenha 18 fileiras de escamas ao redor do corpo, apresenta 259 a 291 escamas dorsais.

  13. CURRENT LAND USE IN ILHA SOLTEIRA, SÃO PAULO STATE, BRAZIL: ENVIRONMENTAL ASSOCIATED RISKS = USO ATUAL DA TERRA NO MUNICÍPIO DE ILHA SOLTEIRA, SP, BRASIL: RISCOS AMBIENTAIS ASSOCIADOS

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    André Luis Altimare

    2004-01-01

    Full Text Available This paper presents the use of the Geographical Information System SPRING/INPE for mapping the current usage of the land in Ilha Solteira, SP, Brazil. This map was utilized as a base to determine the environmental risks resulting from antrophic activities to hydrography watershed components. It was also presented a discussion on the state of degradation of the landscape, with suggestions of options to the definition of strategies of environmental conservation. = Esse trabalho apresenta a utilização do sensoriamento remoto e do geoprocessamento na elaboração da Carta de Uso Atual da Terra no Município de Ilha Solteira, SP. Com base nessa carta foram identificados possíveis riscos ambientais para os ecossistemas aquáticos, associados aos usos atuais da terra. Discutiu-se ainda, o estado atual de degradação da paisagem, visando a definição de estratégias para a conservação ambiental.

  14. Ergasilus chelangulatus sp. nov. (Copepoda: Ergasilidae a branchial parasite of the freshwater catfish, Pimelodus maculatus from the upper São Francisco River, Brazil Ergasilus chelangulatus sp. nov. (Copepoda: Ergasilidae parasito das brânquias do "mandi", Pimelodus maculatus do alto rio São Francisco, Brasil

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    Vernon E. Thatcher

    2008-09-01

    Full Text Available Ergasilus chelangulatus sp. nov. is described from the freshwater fish, Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae of the upper São Francisco River, Minas Gerais State, Brazil. The new species is based on female specimens and the male is unknown. This species has a serrate seta on exopod one and a two-segmented first endopod, as do most Amazonian species of this genus. The body is elongate and produced anteriorly. The antennae are elongate and have prominent sensilla on segments two and three. Ergasilus chelangulatus sp. nov. can be distinguished from all known species of Ergasilus by the fourth antennal segment (claw which is bent at nearly a right angle.Ergasilus chelangulatus sp. nov. é descrita do peixe de água doce, Pimelodus maculatus Lacépède, 1803 (Siluriformes: Pimelodidae do alto rio São Francisco, Minas Gerais, Brasil. A nova espécie está baseada em espécimes fêmeas e o macho é desconhecido. Esta espécie tem uma seta serrilhada no primeiro exopodito e tem o primeiro endopodito bi-segmentado, como a maioria das espécies amazônicas deste gênero. O corpo é alongado e projetado anteriormente. As antenas são alongadas com sensila proeminente no segundo e no terceiro segmentos. Ergasilus chelangulatus sp. nov. é distinta de todas as outras espécies conhecidas de Ergasilus por ter o quarto segmento antenal (garra dobrado em ângulo quase reto.

  15. A new Thalassosmittia Strenzke and Remmert, 1957 out of the sea: T. amazonica n. sp. from the Amazon rainforest, Brazil (Diptera: Chironomidae, Orthocladiinae

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    Trond Andersen

    2014-12-01

    Full Text Available The orthoclad Thalassosmittia amazonica n. sp. is described based on a male collected in a light trap in the Amazon rainforest. The species is easily separated from its congeners as it has a strongly reduced palp with only a single palpomere.Article submitted 12. October 2014, accepted 10. November 2014, published 22. December 2014.

  16. The draft genome sequence of multidrug-resistant Pseudomonas aeruginosa strain CCBH4851, a nosocomial isolate belonging to clone SP (ST277 that is prevalent in Brazil

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    Melise Silveira

    2014-12-01

    Full Text Available The high occurrence of nosocomial multidrug-resistant (MDR microorganisms is considered a global health problem. Here, we report the draft genome sequence of a MDR Pseudomonas aeruginosa strain isolated in Brazil that belongs to the endemic clone ST277. The genome encodes important resistance determinant genes and consists of 6.7 Mb with a G+C content of 66.86% and 6,347 predicted coding regions including 60 RNAs.

  17. The draft genome sequence of multidrug-resistant Pseudomonas aeruginosa strain CCBH4851, a nosocomial isolate belonging to clone SP (ST277) that is prevalent in Brazil

    Science.gov (United States)

    Silveira, Melise; Albano, Rodolpho; Asensi, Marise; Assef, Ana Paula Carvalho

    2014-01-01

    The high occurrence of nosocomial multidrug-resistant (MDR) microorganisms is considered a global health problem. Here, we report the draft genome sequence of a MDR Pseudomonas aeruginosa strain isolated in Brazil that belongs to the endemic clone ST277. The genome encodes important resistance determinant genes and consists of 6.7 Mb with a G+C content of 66.86% and 6,347 predicted coding regions including 60 RNAs. PMID:25466623

  18. Eand P opportunities in Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Castilho, Marcelo [National Petroleum Agency of Brasil (Brazil)

    2011-07-01

    Brazil is one of the world's largest economies and the country also has significant heavy oil reserves. This report from the National Petroleum Agency of Brazil aims at presenting the situation of the oil and gas sector in Brazil in terms of resources, production, regulatory framework and opportunities for the future. Brazil has numerous sedimentary basins at its disposal, most of them being prospected by both national and foreign companies from all over the world. Brazil has over 14 billion barrels of proven reserves, its production is 2,1 MMBbl/d and heavy oil represents almost 40% of that production. The National Petroleum Agency of Brazil is responsible for the implementation of oil sector policy with the aims of maintaining self-sufficiency, implementing good practices in terms of health and safety, and increasing local content. This paper pointed out that Brazil has an important opportunity to enhance its energy sector through the development of heavy oil.

  19. Taphonomy of a Baurusuchus (Crocodyliformes, Baurusuchidae) from the Adamantina Formation (Upper Cretaceous, Bauru Basin), Brazil: Implications for preservational modes, time resolution and paleoecology

    Science.gov (United States)

    Araújo Júnior, Hermínio Ismael de; Silva Marinho, Thiago da

    2013-11-01

    Upper Cretaceous vertebrate accumulations from the Adamantina Formation are known due to their high taxonomic diversity. On the other hand, taphonomic analyses still are rare, limiting the understanding of processes related to the biostratinomic and fossildiagenetic histories of this lithostratigraphic unit. In 2005, fossils were collected from an outcrop located at Jales municipality, state of São Paulo, southeastern Brazil. From this outcrop, a well-preserved Baurusuchus was recovered, which displays a peculiar set of taphonomic signatures. This paper identifies and interprets taphonomic features of a specimen of Baurusuchus (Crocodyliformes, Baurusuchidae; UFRJ DG 418-R) from the Adamantina Formation (Upper Cretaceous of the Bauru Basin), in Jales municipality, state of São Paulo. Brief taphonomic comparisons with other specimens previously studied (crocodiles and dinosaurs) and a lithofaciological analysis of the outcrop were undertaken in order to enhance the knowledge of the stratigraphy and paleoenvironment and improve the time resolution for the Adamantina Formation in the region of Jales. Furthermore, paleoecological data were interpreted based on the taphonomic analysis. The fossil is composed of an articulated segment of vertebral column, ribs, part of the pelvic girdle and gastralia. There is no hydraulic equivalence between both the specimen of Baurusuchus and the size of quartz grain predominant in the fossiliferous layer, suggesting death in situ or short transport as a “water carcass”. Teeth marks identified on the pubes were assigned to a small/juvenile baurusuchid crocodyliform or a theropod dinosaur. The repositioning of some elements (ribs and dorsal osteoderms) is suggestive of mummification. Desiccation marks were observed and attributed to the stage 1 of weathering. These features suggest subaerial exposure of the carcass prior to burial, however, probably after the mummification. On the other hand, the subaerial exposure was short

  20. Assessment of Mass-Transport Deposits occurrence offshore Espírito Santo Basin (SE Brazil) using a bivariate statistical method

    Science.gov (United States)

    Piedade, Aldina; Alves, Tiago; Luís Zêzere, José

    2016-04-01

    Mass Transport Deposits (MTDs) are one of the most important process shaping passive and active margins. It is frequently happening and its characteristics, features and processes has been very well documented from diverse approaches and methodologies. In this work a methodology for evaluation of MTDs occurrence is tested in an area offshore Espírito Santo Basin, SE Brazil. MTDs inventory was made on three-dimensional (3D) seismic volume interpreting a high amplitude reflection which correspond to the top and base of the MTDs. The inventory consists of four MTDs which were integrated into a GIS database. MTDs favourability scores are computed using algorithms based on statistical/probabilistic analysis (Information Value Method) over unique condition terrain units in a raster basis. Terrain attributes derived from the Digital Terrain Model (DTM) are interpreted as proxies of driving factors of MTDs and are used as predictors in our models which are based on a set of different MTDs inventories. Three models are elaborated independently according to the area of the MTDs body (Model 1, Model 2 and Model 3). The final result is prepared by sorting all pixels according to the pixel favourability value in descending order. The robustness and accuracy of the MTDs favourability models are evaluated by the success-rate curves, which are used for the quantitative interpretation of the models expressing the goodness of fit of the MTDs. In addition, a sensitivity analysis was performed and the predisposing factors which have highest prediction performance on MTDs occurrence were identified. The obtained results allow to conclude the method is valid to apply to submarine slopes as it is demonstrated by the highest obtained goodness of fit (0.862). This work is very pioneer, the methodology used was never applied to submarine environment. It is a very promising and valid methodology within the prediction of submarine slopes regarding failing and instability to the industry. In