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Sample records for bahia blanca estuary

  1. The role of the smooth cordgrass Spartina alterniflora and associated sediments in the heavy metal biogeochemical cycle within Bahia Blanca estuary salt marshes

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    Hempel, M. [Dept. of Environmental Process Engineering, International Graduate School Zittau, Zittau (Germany); Botte, S.E. [Area de Oceanografia Quimica, Inst. Argentino de Oceanografia (IADO), CCT-CONICET, Bahia Blanca (Argentina); Dept. de Biologia, Bioquimica y Farmacia (DBBF), Univ. Nacional del Sur (UNS), Bahia Blanca (Argentina); Negrin, V.L.; Chiarello, M.N. [Area de Oceanografia Quimica, Inst. Argentino de Oceanografia (IADO), CCT-CONICET, Bahia Blanca (Argentina); Marcovecchio, J.E. [Area de Oceanografia Quimica, Inst. Argentino de Oceanografia (IADO), CCT-CONICET, Bahia Blanca (Argentina); Facultad Regional Bahia Blanca (UTN-FRBB), Univ. Tecnologica Nacional, Bahia Blanca (Argentina); Univ. FASTA, Mar del Plata (Argentina)

    2008-10-15

    Background, aim, and scope Bahia Blanca estuary is characterized by the occurrence of large intertidal areas, including both naked tidal flats and salt marshes densely vegetated with Spartina alterniflora. The estuary is strongly affected by human activities, including industrial and municipal discharges, harbor maintenance, cargo vessels and boat navigation, oil storage and processing, etc. Even numerous studies have reported the occurrence and distribution of heavy metals in sediments and biota from this estuary, although the function of the halophyte vegetation on metals distribution was at present not studied. The main objective of the present study was to understand the potential role of the salt marshes as a sink or source of metals to the estuary, considering both the obtained data on metal levels within sediments and plants from the studied areas at naked tidal as well as vegetated flats. Conclusions and recommendations Considering the comments on the previous paragraphs, salt marshes from Bahia Blanca estuary are sources or sinks for metals? It can be sustained that both are the case, even if it is often stated that wetlands serve as sinks for pollutants, reducing contamination of surrounding ecosystems (Weis and Weis, Environ Int 30:685-700, 2004). In the present study case, the sediments (which tend to be anoxic and reduced) act as sinks, while the salt marshes can become a source of metal contaminants. This is very important for this system because the macrophytes have been shown to retain the majority of metals in the underground tissues, and particularly in their associated sediments. This fact agreed well with previous reports, such as that from Leendertse et al., (Environ Pollut 94:19-29, 1996) who found that about 50% of the absorbed metals were retained in salt marshes and 50% was exported. Thus, keeping in mind the large spreading of S. alterniflora salt marshes within Bahia Blanca estuary, it must be carefully considered as a redistributor of

  2. Sistema interconectado de canales de marea del estuario de Bahía Blanca, Argentina: evaluación de la circulación de sedimento como carga de fondo por métodos acústicos An interconnected system of tidal channels in Bahia Blanca estuary, Argentina: an evaluation of bedload sediment transport through acoustic methods

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    Silvia S Ginsberg

    2009-01-01

    Full Text Available El estuario de Bahía Blanca, ubicado al sur de la provincia de Buenos Aires (Argentina, constituye una costa baja con extensas llanuras de marea, islas y una compleja red de canales de diferentes magnitudes. Estos últimos integran un sistema de canales interconectados. El objetivo de este trabajo es establecer la circulación sedimentaria como carga de fondo en un sistema de canales interconectados (Cabeza de Buey, El Alambre, La Lista y Principal mediante el análisis de los rasgos morfológicos de fondo, utilizando métodos acústicos (ecosonda y sonar lateral. El canal Cabeza de Buey se comunica con el canal La Lista a través del canal El Alambre. Los dos primeros vierten sus aguas en el canal Principal. El canal Cabeza de Buey posee un lecho plano constituido por material pelítico con arena muy fina. En su tramo más interno se presentan dunas medianas compuestas por arena fina, con un perfil asimétrico según el reflujo. Estas formas, continúan su desarrollo ininterrumpidamente hacia el canal El Alambre, donde se originan dunas grandes (altura 1,5 m formadas por arena muy fina. Sus crestas son sinuosas o barjanoides y poseen su talud hacia la corriente de bajante. En el canal La Lista se determinan dunas asimétricas medianas orientadas según el reflujo y grandes linea-ciones sedimentarias (sand ribbons sobre un fondo consolidado. El sedimento movilizado por la corriente corresponde a la fracción limo-arena fina. La distribución y configuración de las geoformas evidencian que el transporte sedimentario como carga de fondo se concentra principalmente en el canal La Lista. Es así como en el sistema de canales estudiado, sólo un canal de marea regula la dispersión de arena, transportando un importante volumen hacia el canal de navegación.Bahia Blanca estuary located in the south of Buenos Aires province, Argentina, is characterized by a low coastal area with large tidal plains, islands, and a complex network of tidal channels of

  3. Seismic Stratigraphy of Pleistocene Deltaic Deposits in Bahía Blanca Estuary, Argentina

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    SALVADOR ALIOTTA

    2014-06-01

    Full Text Available The Bahía Blanca estuary (Argentina has a morphological configuration resulting from hydrological and sedimentary processes related to Late Quaternary sea level changes. This estuarine system occupies a large coastal plain with a dense net of tidal channels, low-altitude islands and large intertidal flats. Little is known about the sedimentary units of the marine subbottom. Therefore, a stratigraphical analysis of the northern coast of Bahía Blanca estuary was carried out using high resolution seismic (3.5 kHz in order to: i define Quaternary sequences, ii describe sedimentary structures, and iii determine the paleoenvironmental conditions of sedimentation. The seismic stratigraphic data collected and their correlation with drilling lithological data show five seismic sequences (S1, S2, S3, S4 and S5, of which S1-S2 were found to be associated with a continental paleoenvironment of Miocene-Pleistocene age. Sequences S3 and S4, whose lithology and seismic facies (paleochannel structures and prograding reflection configurations, were defined on these materials, to evidence the development of an ancient deltaic environment which was part of a large Pleistocene drainage system. The S5 sequence was formed during the Holocene transgressive-regressive process and complete the seismostratigraphic column defined in the present study.

  4. Organotin compounds in Brachidontes rodriguezii mussels from the Bahía Blanca Estuary, Argentina.

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    Quintas, Pamela Y; Arias, Andrés H; Oliva, Ana L; Domini, Claudia E; Alvarez, Mónica B; Garrido, Mariano; Marcovecchio, Jorge E

    2017-11-01

    Levels of tributyltin and its breakdown compounds, including the first record of monobutyltin (MBT) in history for Latin America, were determined in native mussels (Brachidontes rodriguezii) by means of CG-MS, after extraction/derivatization assisted by ultrasound. The samples were collected in 2013 in Bahía Blanca Estuary (Argentina) at 6 sites, which reflect different levels of maritime activities. Total butyltins (TBts = TBT+ DBT+ MBT) levels ranged from 19.64 to 180.57ng Sn g -1 dry weight. According to the Oslo-Paris commission, the results indicated that 73.9% of mussels could be under biological effects risks associated with TBT pollution. In accordance with the calculated bioaccumulation factors, approximately 56% of samples appeared to have accumulated TBT through the sediments. All sampling sites were shown to be impacted by organotin compounds (OTCs) showing variable levels through seasons, which could be related with the variation of the water temperature. Degradation index analyses suggested aged inputs of TBT possibly under a general degradation process at the area of study. In addition, the occurrence of DBT and MBT could not be uniquely attributed to the degradation pathway of the TBT; in fact, results outlined the possible contribution of some punctual and diffuse sources at the area such as proximity to plastic industries, industrial effluents, sewage outlets and domestic wastewaters. Copyright © 2017 Elsevier Inc. All rights reserved.

  5. Mesozooplankton and Ichthyoplankton composition in two tropical estuaries of Bahia, Brazil

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    Marcolin, C. R.

    2010-01-01

    Full Text Available The objective of this study was to describe the composition of two mesozooplankton and ichthyoplanktonestuarine communities in Jandaíra, Bahia (Tabatinga River, impacted by a shrimp farm; and in Conde, Bahia (ItapicuruRiver, a pristine estuary. Samples were collected through horizontal hauls using a net (200 μm mesh size, coupled to aflowmeter, during the ebbing and flooding tides in April, August and December, 2007. In the Tabatinga and Itapicuru Rivers76 and 92 taxa were registered. The most abundant groups were Pseudodiaptomus richardii and Disco sp. Acartia lilljeborgiwas also dominant at Tabatinga, while Temora sp. and decapod larvae were predominant in Itapicuru River, which alsopresented higher densities for most planktonic taxa, particularly fish larvae. A descriptive analysis of the main taxa´s spatialdistribution and new geographical records of Disco sp., P. richardi, Pontellopsis villosa, Macrosetella gracilis, Microsetellarosea, Gonyiopsillus brasiliensis, Agetus flaccus and Ergasilus caraguatatubensis were presented.

  6. Distribution, vertical position and ecological implications of shallow gas in Bahía Blanca estuary (Argentina)

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    Bravo, M. E.; Aliotta, S.; Fiori, S.; Ginsberg, S.

    2018-03-01

    There has been a growing interest in the study of shallow gas due its importance in relation to the marine environment, climate change and human activities. In Bahía Blanca estuary, Argentina, shallow gas has a wide distribution. Acoustic turbidity and blanking are the main seismic evidence for the presence of shallow gas in the estuary. The former prevails in the inner sector of the estuary where gas is either near or in contact with the seabed. Gas deposits are generally associated with paleochannels corresponding to the Holocene paleodeltaic environment. Distribution studies of shallow gas in this estuary are necessary because its presence implies not only a geological risk for harbor activities but also because it may have noxious effects on the marine ecosystem, mainly on benthic communities. The comparison of benthic communities at a gas site (GS) with those at a control site (CS) indicated that gas could generate impoverishment in terms of individuals' abundance (GS: N = 357; CS: N = 724). Also, diversity indices showed great differences in the community structure at each site. This indicates that methane gas may act as a natural disturbance agent in estuarine ecosystems. The presence of gas in seabed sediments must therefore be taken into account when distribution studies are conducted of estuarine benthic communities.

  7. Circulation and suspended particulate matter transport in a tidally dominated estuary: caravelas estuary, Bahia, Brazil

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    Carlos Augusto França Schettini

    2010-03-01

    Full Text Available The circulation and transport of suspended particulate matter in the Caravelas Estuary are assessed. Nearly-synoptic hourly hydrographic, current (ADCP velocity and volume transport and suspended particulate matter data were collected during a full semidiurnal spring tide, on the two transects Boca do Tomba and Barra Velha and on longitudinal sections at low and high tide. On the first transect the peak ebb currents (-1.5 ms-1 were almost twice as strong as those of the wider and shallow Barra Velha inlet (-0.80 ms-1 and the peak flood currents were 0.75 and 0.60 ms-1, respectively. Due to the strong tidal currents both inlets had weak vertical salinity stratification and were classified with the Stratification-circulation Diagram as Type 2a (partially mixed-weakly stratified and Type 1a (well mixed. Volume transports were very close, ranging from -3,500 to 3,100 m³s-1 at the ebb and flood, respectively, with a residual -630 m³s-1. The concentration of the suspended particulate matter was closely related to the tidal variation and decreased landwards from 50 mg.L-1 at the estuary mouth, to 10 mg.L-1 at distances of 9 and 16 km for the low and high tide experiments, respectively. The total residual SPM transport was out of the estuary at rates of -18 tons per tidal cycle.A circulação e o transporte de material particulado em suspensão no Estuário de Caravelas são pesquisados. Dados quase-sinóticos hidrográficos, de correntes (velocidade e transporte de volume com ADCP e de material particulado em suspensão, foram medidos em intervalos horários durante um ciclo semidiurno de maré de sizígia, em duas seções transversais na Boca do Tomba e na Barra Velha e também em seções longitudinais na baixa-mar e na preamar. Na primeira transversal as correntes máximas de vazante (-1,50 m s-1 foram quase duas vezes mais intensas do que na seção transversal mais larga e rasa Barra Velha, (-0,80 m s-1 e as maiores velocidades das correntes de

  8. Ichthyoplankton spatial pattern in the inner shelf off Bahía Blanca Estuary, SW Atlantic Ocean

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    Hoffmeyer, Mónica Susana; Clara, Menéndez María; Florencia, Biancalana; Mabel, Nizovoy Alicia; Ramón, Torres Eduardo

    2009-09-01

    This study focuses on the composition, abundance and distribution of ichthyoplankton in the inner shelf area off Bahía Blanca Estuary on the SW Atlantic Ocean during late spring. Eggs and larvae of Brevoortia aurea, Engraulis anchoita, Parona signata, Sciaenidae spp. - such as Cynoscion guatucupa and Micropogonias furnieri -, and Odontesthes argentinensis were found. Species richness was low probably as a result of season and shallow depths. Ichthyoplankton abundance reached values close to 10 000 per 10 m -3 (eggs) and 4000 per 10 m -3 (larvae) and displayed a spatial distribution pattern with maximum abundance values restricted to a band parallel to the coast. Differences between egg and larval patterns, probably derived from a different displacement and hydrodynamic behavior, were observed. Egg and larvae distribution patterns were found related with spawning areas and to directly depend on salinity and mesozooplankton. The larvae distribution pattern, in particular, was found to inversely depend on particulate organic carbon. In addition, the geographic location of egg and larvae maxima strongly coincided with a saline front reported for this area in springtime, thus suggesting a direct relationship with it.

  9. “Gate and Port of the South of Argentina”? Nuances and Debates in the Image of Bahia Blanca City in Its Regional Context in the Mid-twentieth Century

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    Juliana López Pascual

    2016-01-01

    Full Text Available For over a century the people of Bahia Blanca, Argentinian port city located at the south west of the province of Buenos Aires, they have imagined it and defined it not only as part of the Patagonian territories but also as their legitimate political, economic and cultural center. The aim of historicizing and questioning this idea, trying to account for the interests that were mobilized, the ideological postures that hinted, and the impact it had on the effective regional layout, is what motivates our research. To that end, this article does focus on economic and infrastructural dimension that some debates of mid-twentieth century used simultaneously as evidence and as ultimate goal of this alleged hegemony. For this purpose, we will analyze the writings of Domingo Pronsato and Ricardo M. Ortiz whom, from different geopolitical perspectives, devised specific roles for the city that suited their plans for the regional development of Patagonia.

  10. Environmental cadmium and lead concentrations in the Bahía Blanca Estuary (Argentina. Potential toxic effects of Cd and Pb on crab larvae

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    Laura Ferrer

    2000-12-01

    Full Text Available The Bahía Blanca Estuary includes a large tidal plain with an area close to 1150 km2. Mud is predominant in its sediments, where a significant population of the crab Chasmagnathus granulata lives during the whole year. Moreover, there are important urban and industrial discharges into this environment. Cd and Pb concentrations were determined in samples of water (for both dissolved and suspended particulate matter and surface sediments (total and 63 µm fractions. Organic matter was analysed in the sediments, while temperature, salinity, pH and dissolved oxygen were measured in the estuarine water. The metal concentrations determined in this study were: 1.47 ± 1.08 µg Cd g–1 and 14.68 ± 4.31 µg Pb g–1 in surface sediments; 2.21 ± 1.33 µg Cd g–1 and 25.70 ± 7.09 µg Pb g–1 in the –1 and below the analytical detection limit of Pb in suspended particulate matter. Furthermore, dissolved Cd and Pb were lower than the norms for marine and estuarine waters (2 µg dm–3 for Cd and 5 µg dm–3 for Pb, E.P.A.. Simultaneously, the effects of Cd and Pb were studied on recently hatched larvae of Ch. granulata, through 96-hour semi-static acute assays. Viability was the criterion assessed in the assays. LC50 (96 h for Cd was 46.43 µg dm–3 (36.92 - 56.34 µg dm–3, whilst that for Pb was 1.00 mg m–3 (0.79 - 1.23 mg dm–3, which demonstrates that Cd is more toxic towards larvae. Finally, both LC50 values determined for Cd and Pb were higher than the corresponding metal concentrations measured in the Bahía Blanca environment.

  11. Recent sedimentation rates in the Caravelas estuary (Bahia, Brazil) using unsupported 210Pb and 137Cs modeling

    International Nuclear Information System (INIS)

    Friedmann Angeli, Jose Lourenco; Alves de Lima Ferreira, Paulo; Lopes Figueira, Rubens Cesar; Venturini, Natalia; Univ. of la Republica, Montevideo

    2016-01-01

    The Caravelas estuary is located in a zone of the Brazilian coast (Southern Bahia State) which has been submitted to different kinds of land uses during the last 50 years. This zone has an important ecological role, due to its mangroves and its location next to Abrolhos coral reef, the most important in the Southern Atlantic Ocean. 210 Pb and 137 Cs dating methods, accompanied by a sedimentological study, were applied to sediment cores in order to establish sedimentation rates and identify historical trends of land use and erosive processes. Sedimentation rates were established according to the ''Constant Rate of Supply'' (CRS) 210 Pb dating model, which was preferred rather than the ''Constant Initial Concentration'' (CIC) model. Corrected sedimentation rates obtained from 210 Pb dating were corroborated through a second independent radionuclide tracer such as 137 Cs. The sedimentation rates obtained according to the CRS model for the cores were 1.07 ± 0.13 cm yr -1 for T2 (inner sector), 0.65 ± 0.06 cm yr -1 for T5 and 0.85 ± 0.09 cm yr -1 for T8 (outer sector). The difference in sedimentation rates among the sampling sites could be due to hydrodynamic processes and could be related to the tendency of increase of erosive processes, conditioned by the changes in the landscape and land use to, which this region has been submitted.

  12. Parasites in the mangrove oyster Crassostrea rhizophorae cultivated in the estuary of the Graciosa River in Taperoá, Bahia.

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    Cova, Aliane Watanabe; Serafim Júnior, Moacyr; Boehs, Guisla; Souza, Jackson Moreira de

    2015-01-01

    In this work, parasites associated with the mangrove oyster Crassostrea rhizophorae were studied at a cultivation unit in the estuary of the Graciosa River in Taperoá, Bahia. On a monthly basis, between April 2011 and March 2012, 20 oysters were collected, measured and fixed in 10% formaldehyde. In order to identify the parasites, routine histological techniques were used. The specimens were embedded in paraffin and sections, 7 µm thick, were cut. These were then stained with Harris hematoxylin and eosin and were examined using an optical microscope. The parameters analyzed to investigate water quality showed that the temperature ranged from 23.9 °C to 29.3 °C, water salinity from 0.4 to 24.2 Practical Salinity Units PSU and recorded rainfall from 80 mm to 406.4 mm/month. During the parasitological analyses, infestation of the polychaete Neanthes succinea was observed in 41% of the oysters. Through histological techniques, the following parasites were identified: colonies of Rickettsia-like organisms (RLOs); the protozoa Nematopsis sp. and Ancistrocoma sp.; the turbellarian Urastoma sp.; the metacestode Tylocephalum sp. and an unidentified tapeworm. The data collected showed that there was low-intensity infection with and prevalence of parasites, except for Nematopsis sp., thus attesting that these cultivated oysters were in a healthy condition.

  13. Parasites in the mangrove oyster Crassostrea rhizophorae cultivated in the estuary of the Graciosa River in Taperoá, Bahia

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    Aliane Watanabe Cova

    Full Text Available In this work, parasites associated with the mangrove oyster Crassostrea rhizophorae were studied at a cultivation unit in the estuary of the Graciosa River in Taperoá, Bahia. On a monthly basis, between April 2011 and March 2012, 20 oysters were collected, measured and fixed in 10% formaldehyde. In order to identify the parasites, routine histological techniques were used. The specimens were embedded in paraffin and sections, 7 µm thick, were cut. These were then stained with Harris hematoxylin and eosin and were examined using an optical microscope. The parameters analyzed to investigate water quality showed that the temperature ranged from 23.9 °C to 29.3 °C, water salinity from 0.4 to 24.2 Practical Salinity Units PSU and recorded rainfall from 80 mm to 406.4 mm/month. During the parasitological analyses, infestation of the polychaete Neanthes succinea was observed in 41% of the oysters. Through histological techniques, the following parasites were identified: colonies of Rickettsia-like organisms (RLOs; the protozoa Nematopsis sp. and Ancistrocoma sp.; the turbellarian Urastoma sp.; the metacestode Tylocephalum sp. and an unidentified tapeworm. The data collected showed that there was low-intensity infection with and prevalence of parasites, except for Nematopsis sp., thus attesting that these cultivated oysters were in a healthy condition.

  14. Short-term variability on mesozooplankton community in a shallow mixed estuary (Bahía Blanca, Argentina): Influence of tidal cycles and local winds

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    Menéndez, María C.; Piccolo, María C.; Hoffmeyer, Mónica S.

    2012-10-01

    The short-term dynamics of zooplankton in coastal ecosystems are strongly influenced by physical processes such as tides, riverine runoff and winds. In this study, we investigated the short-term changes of the representative taxa within mesozooplankton in relation to the semidiurnal tidal cycles. Also, we evaluated the influence of local winds on this short-term variability. Sampling was carried out bimonthly from December 2004 to April 2006 in a fixed point located in the inner zone of the Bahía Blanca Estuary, Argentina. Mesozooplankton samples were taken by pumps during 14-h tidal cycles at 3-h intervals, from surface and bottom. Vertical profiles of temperature and salinity as well as water samples to determine suspended particulate matter were acquired at each sampling date. All data concerning winds were obtained from a meteorological station and water level was recorded with a tide gauge. Holoplankton dominated numerically on meroplankton and adventitious fraction. Concerning holoplanktonic abundance, the highest values were attained by the calanoid copepods Acartia tonsa and Eurytemora americana. Meroplankton occurred mainly as barnacle larvae while benthic harpacticoids and Corophium sp. dominated the adventitious component. Semidiurnal tide was the main influence on the A. tonsa variability. However, noticeable differences in the abundance pattern as function of wind intensity were detected. Meroplankton abundance did not show a clear variation along the tidal cycle. Distributional pattern of harpacticoids seemed to be mainly modulated by velocity asymmetries in the tidal currents, in the same way as suspended particulate matter. However, the Corophium sp. distribution indicated probable behavioural responses associated with tides. The obtained results show how variable the mesozooplankton community structure can be over short-term time scales in mesotidal temperate estuaries. This variability should be taken into account for any zooplankton monitoring

  15. RECUPERACIÓN DE ESPACIOS URBANOS Y PERIURBANOS MEDIANTE LA IMPLEMENTACIÓN DE PARQUES-HUERTAS EN LA CIUDAD DE BAHIA BLANCA

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    Jezabel Franza

    2008-12-01

    desarrolla un sentimiento distintivo de territorialidad. El objetivo de la presente comunicación es brindar los fundamentos y bases para la implementación de este tipo de espacios de agricultura urbana y periurbana en la ciudad de Bahía Blanca. Esta clase de proyectos puede ser entendido como una posibilidad de progreso en la gestión ambiental urbana para ciudades como la mencionada donde existe una escasa política en relación con los espacios ociosos y la única respuesta, en el mejor de los casos, es transformar estas tierras en espacios de circulación peatonal. La metodología se sustenta en la recopilación, análisis e interpretación de material bibliográfico y testimonios de informantes claves mediante el empleo de técnicas cualitativas propias de la Geografía Humana. Para ello se emplea como base del análisis la experiencia de la ciudad de Rosario, la cual es pionera en esta modalidad de recuperación de espacios y se incluye en un proyecto integral de desarrollo urbano singular. Creemos conveniente mencionar que el presente trabajo surge como instancia evaluadora final de la Cátedra Curso de Desarrollo Ambiental Urbano dictado por la Dra. María Amalia Lorda, correspondiente a los Ciclos de Orientación Organización y Ordenamiento del Espacio Urbano y Regional y Gestión de los Recursos Naturales y Medio Ambiente del quinto año de la Licenciatura en Geografía del Departamento de Geografía y Turismo de la Universidad Nacional del Sur. Asimismo el escrito es una inquietud grupal que propone recuperar espacios urbanos degradados mediante la iniciativa de agricultura urbana a través de la implementación de parques-huerta.

  16. Impact of a power plant cooling system on copepod and meroplankton survival (Bahía Blanca estuary, Argentina Impacto del sistema de enfriamiento de una central termoeléctrica sobre la supervivencia de copépodos y meroplancton (estuario de Bahía Blanca, Argentina

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    Mónica Susana Hoffmeyer

    2005-09-01

    Full Text Available The impact of a power plant cooling system in the Bahía Blanca estuary (Argentina on the survival of target zooplanktonic organisms (copepods and crustacean larvae and on overall mesozooplankton abundance was evaluated over time. Mortality rates were calculated for juveniles and adults of four key species in the estuary: Acartia tonsa Dana, 1849 and Eurytemora americana Williams, 1906 (native and invading copepods, and larvae of the crab Chasmagnathus granulata Dana, 1851 and the invading cirriped Balanus glandula Darwin, 1854. Mean total mortality values were up to four times higher at the water discharge site than at intake, though for all four species, significant differences were only registered in post-capture mortality. The findings show no evidence of greater larval sensitivity. As expected, the sharpest decrease in overall mesozooplankton abundance was found in areas close to heated water discharge.El impacto del sistema de enfriamiento de una planta termoeléctrica ubicada en el estuario de Bahía Blanca, Argentina, fue evaluado en el tiempo, sobre la supervivencia de especies zooplanctónicas seleccionadas (copépodos y larvas de crustáceos y la abundancia general del meso-zooplancton. Se calcularon tasas de mortalidad de juveniles y adultos de cuatro especies clave en el estuario: Acartia tonsa Dana,1849 y Eurytemora americana Williams,1906 (copépodos nativo e invasor, y larvas del cangrejo Chasmagnathus granulata Dana, 1851 y del cirripedio invasor Balanus glandula Darwin, 1854. Los valores medios hallados de la tasa de mortalidad total, fueron hasta cuatro veces más altos en la descarga que en el agua de entrada al sistema. Sin embargo sólo se registraron diferencias significativas entre estos dos sitios, en los valores de mortalidad post-captura obtenidos para las cuatro especies. Los resultados del estudio no demostraron una mayor sensibilidad larval. Como se esperaba, la disminución más pronunciada en la abundancia general

  17. Rosa Blanca

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    Gloria Lapeña-Gallego

    2017-01-01

    Full Text Available A través de la Memoria Histórica, la Historia con mayúsculas se ha convertido en una fuente inagotable para narrar grandes historias con minúscula. De manera paralela, el paso de una cultura eminentemente letrada a otra más visual con predominio de la imagen ha favorecido la progresiva incorporación en el ámbito educativo de fuentes procedentes de la cultura popular, cuyos autores se aproximan al hecho histórico desde una perspectiva más íntima y reflexiva. En el presente artículo se fundamenta el potencial del álbum ilustrado como fórmula narrativa complementaria al manual escolar o libro de texto de Historia, especialmente en el tratamiento de temas complejos y delicados, como el holocausto nazi. Además, se propone un modelo de análisis que tiene en cuenta las particularidades de este género artístico en la construcción de la historiografía por medio de la incorporación de imágenes que van más allá de ser una redundancia o aclaración del texto. Para el cumplimiento de ambos objetivos, una vez analizado la concepción actual de la narración histórica, se estudia en detalle el álbum Rosa Blanca, contextualizado en la ocupación nazi durante la Segunda Guerra Mundial.

  18. Parásitos en aguas del arroyo Naposta, aguas de recreación y de consumo en la ciudad de Bahia Blanca (Provincia de Buenos Aires, Argentina)

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    COSTAMAGNA, SIXTO RAÚL; VISCIARELLI, ELENA; LUCCHI, LEANDRO D; BASUALDO, JUAN A

    2005-01-01

    El objetivo del presente trabajo fue detectar la presencia de parásitos de importancia sanitaria para el hombre, en el arroyo Napostá, en aguas recreacionales (piscinas públicas) y de consumo en Bahía Blanca (Provincia de Buenos Aires) Argentina. Se recolectaron 24.000 litros de agua de diferentes sectores del arroyo Napostá, 2.000 litros de cada una de las tres piscinas públicas y 8.000 litros de agua de consumo, mediante filtros de poro de una micra de diámetro (Cuno Micro Wind). El procesa...

  19. Moessbauer studies on some Argentinian soil: mollisols from Bahia Blanca

    International Nuclear Information System (INIS)

    Saragovi, C.; Venegas, R.

    1994-01-01

    Clay fractions of a Mollisol sample as is, treated with ammonium oxalate (AO), with dithionite-citrate-bicarbonate (DCB) and with dithionite-ethilene-diamine- tetraacetic acid (D-EDTA) methods, were studied. Illite-montmorillonites together with hematites, goethites and maghemites, all of the Al-substituted and with a wide range of sizes, were identified. It is found that the AO attack extracts little iron, whereas the other two attacks extract the magnetic signal. Furthermore, the DCB attack facilitates the reduction of the Fe 3+ ions, while the D-EDTA method does not. Instead, this attack extracts more clay mineral Fe ions. A comparison with large grain soil samples is made. (orig.)

  20. Ciclo gametogênico e comportamento reprodutivo de Iphigenia brasiliana (Mollusca, Bivalvia, Donacidae no estuário do rio Subaé, Baía de Todos os Santos, Bahia, Brasil Gametogenic cycle and reproductive behavior of Iphigenia brasiliana (Mollusca, Bivalvia, Donacidae in the Subaé river estuary, Todos os Santos Bay, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Patrícia P. Silva

    2012-12-01

    ém, no mês de outubro de 2002.This study aimed to describe the gametogenic cycle and reproductive behavior of the population of Iphigenia brasiliana (Lamarck, 1818 in the estuary of the Subaé river, Todos os Santos Bay, Bahia. The bivalves were collected from November 2001 to November 2002. A total of 244 specimens was measured (anteroposterior axis, gutted, fixed, dehydrated and embedded in paraffin. The histology of the gonads was performed by 5 mm thick serial sections of gonadal tissue, and stained with HE. The length at the beginning of gonadal maturation (Lpm was estimated from the distribution of the relative frequencies of youth and adults, by length class of individuals. The relative frequencies of the sexes at each stage of development were considered together for the analysis of the reproductive behavior of the population, and, separately, to assess the sexual cycle synchrony between males and females. We observed a variation of sizes between 9.1 and 66.6 mm, with a mean length of 50.2 mm. The study showed no significant difference between the sizes of males and females. There was no evidence of gender differentiation in 2.1% of subjects analyzed. 51.6% of subjects were identified as males (M and 46.3% as females (F, without significant differences among average number of male and female, resulting in the proportion of M:F ratio of 1,1:1. Lpm was estimated at 11.4 mm, but only to achieve average length of 34.4 mm, all subjects were considered adults. We characterized four stages of evolution of gonadal development in females and males. Analysis of different stages allowed the observation of the atresia phenomena and sex reversal in females. The reproductive cycle presents continuous elimination of gametes, with higher reproductive intensities in the months of November 2001 to April 2002 and also in October 2002.

  1. Ciclo gametogênico e comportamento reprodutivo de Iphigenia brasiliana (Mollusca, Bivalvia, Donacidae no estuário do rio Subaé, Baía de Todos os Santos, Bahia, Brasil Gametogenic cycle and reproductive behavior of Iphigenia brasiliana (Mollusca, Bivalvia, Donacidae in the Subaé river estuary, Todos os Santos Bay, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Patrícia P. Silva

    2012-01-01

    ém, no mês de outubro de 2002.This study aimed to describe the gametogenic cycle and reproductive behavior of the population of Iphigenia brasiliana (Lamarck, 1818 in the estuary of the Subaé river, Todos os Santos Bay, Bahia. The bivalves were collected from November 2001 to November 2002. A total of 244 specimens was measured (anteroposterior axis, gutted, fixed, dehydrated and embedded in paraffin. The histology of the gonads was performed by 5 mm thick serial sections of gonadal tissue, and stained with HE. The length at the beginning of gonadal maturation (Lpm was estimated from the distribution of the relative frequencies of youth and adults, by length class of individuals. The relative frequencies of the sexes at each stage of development were considered together for the analysis of the reproductive behavior of the population, and, separately, to assess the sexual cycle synchrony between males and females. We observed a variation of sizes between 9.1 and 66.6 mm, with a mean length of 50.2 mm. The study showed no significant difference between the sizes of males and females. There was no evidence of gender differentiation in 2.1% of subjects analyzed. 51.6% of subjects were identified as males (M and 46.3% as females (F, without significant differences among average number of male and female, resulting in the proportion of M:F ratio of 1,1:1. Lpm was estimated at 11.4 mm, but only to achieve average length of 34.4 mm, all subjects were considered adults. We characterized four stages of evolution of gonadal development in females and males. Analysis of different stages allowed the observation of the atresia phenomena and sex reversal in females. The reproductive cycle presents continuous elimination of gametes, with higher reproductive intensities in the months of November 2001 to April 2002 and also in October 2002.

  2. Herida precordial por arma blanca

    Directory of Open Access Journals (Sweden)

    Marcelo F. Jiménez

    2005-04-01

    Full Text Available Varón de 42 años con esquizofrenia paranoide. Intento de suicidio con tres autolesiones por arma blanca (Fig. 1. Fue traído al hospital en estado consciente, taquicárdico, taquipneico y con tensión arterial (TA de 140/90 mmHg. Fue trasladado al quirófano, donde se practicó una toracotomía axilar izquierda sin extraer el arma. Durante la intervención se apreciaron tres heridas incisas, dos no penetrantes, hemotórax de 150 ml, herida pericárdica de 4 cm, sin lesiones cardíacas. La hoja del arma blanca penetraba a través del diafragma produciendo una herida incisa en el lóbulo hepático izquierdo (Fig. 2. Se extrajo el arma y se suturó la laceración hepática. El paciente fue trasladado el cuarto día a la Unidad de Psiquiatría.

  3. Herida precordial por arma blanca

    OpenAIRE

    Marcelo F. Jiménez; Nuria Novoa; José Luis Aranda; Gonzalo Varela

    2005-01-01

    Varón de 42 años con esquizofrenia paranoide. Intento de suicidio con tres autolesiones por arma blanca (Fig. 1). Fue traído al hospital en estado consciente, taquicárdico, taquipneico y con tensión arterial (TA) de 140/90 mmHg. Fue trasladado al quirófano, donde se practicó una toracotomía axilar izquierda sin extraer el arma. Durante la intervención se apreciaron tres heridas incisas, dos no penetrantes, hemotórax de 150 ml, herida pericárdica de 4 cm, sin lesiones cardíacas. La hoja del ar...

  4. Natural Analog Studies at Pena Blanca, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    A.M. Simmons

    2005-07-11

    The significance of the Pena Blanca uranium deposits in the State of Chihuahua, Mexico as potential natural analogs for a nuclear waste repository in unsaturated welded tuff was first recognized in the 1980s. In the 1970s, the Pena Blanca region was a major target of uranium exploration and exploitation by the Mexican government. Since then the Nopal I uranium deposit has been studied extensively by researchers in the U.S., Mexico, and Europe. The Nopal I deposit represents an environment similar to that of the proposed high-level radioactive waste repository at Yucca Mountain in many ways. Both are located in semi-arid regions. Both are located in Tertiary rhyolitic tuffs overlying carbonate rocks that have been subjected to basin and range-style tectonic deformation. Both are located in a chemically oxidizing, unsaturated zone 200 m or more above the water table. The alteration of uraninite to secondary minerals at Nopal I may be similar to the alteration of uranium fuel rods in this type of setting. Investigations at Nopal I and in the surrounding Sierra Pena Blanca have included detailed outcrop mapping, hydrologic and isotopic studies of flow and transport, studies of mineral alteration, modeling, and performance assessment.

  5. Natural Analog Studies at Pena Blanca, Mexico

    International Nuclear Information System (INIS)

    A.M. Simmons

    2005-01-01

    The significance of the Pena Blanca uranium deposits in the State of Chihuahua, Mexico as potential natural analogs for a nuclear waste repository in unsaturated welded tuff was first recognized in the 1980s. In the 1970s, the Pena Blanca region was a major target of uranium exploration and exploitation by the Mexican government. Since then the Nopal I uranium deposit has been studied extensively by researchers in the U.S., Mexico, and Europe. The Nopal I deposit represents an environment similar to that of the proposed high-level radioactive waste repository at Yucca Mountain in many ways. Both are located in semi-arid regions. Both are located in Tertiary rhyolitic tuffs overlying carbonate rocks that have been subjected to basin and range-style tectonic deformation. Both are located in a chemically oxidizing, unsaturated zone 200 m or more above the water table. The alteration of uraninite to secondary minerals at Nopal I may be similar to the alteration of uranium fuel rods in this type of setting. Investigations at Nopal I and in the surrounding Sierra Pena Blanca have included detailed outcrop mapping, hydrologic and isotopic studies of flow and transport, studies of mineral alteration, modeling, and performance assessment

  6. La España de Rosas Blancas = The Spain of Rosas Blancas

    Directory of Open Access Journals (Sweden)

    Óscar Gual Boronat

    2015-06-01

    Full Text Available Mediante la lectura del cuaderno femenino español Rosas blancas, publicado por la editorial Toray entre 1958 y 1965, tratamos de estudiar la capacidad del cómic para reflejar el papel de la mujer durante una de las etapas clave de la dictadura franquista. Tras trazar un recorrido por los tebeos sentimentales de la década de 1940 (Azucena y las primeras revistas modernas para niñas (Florita y Sissi, analizaremos el contenido de dicha publicación. En ese análisis percibiremos cómo Rosas blancas prolongará determinados mitos de aquellas historietas al tiempo que introducirá nuevas perspectivas en consonancia con lo que estaba sucediendo en la sociedad española.Through the reading of the Spanish female comic-book Rosas blancas, published by Editorial Toray between 1958 and 1965, we try to explore the ability of comics to reflect the role of women during the key stages of the Franco dictatorship. After a study of the sentimental comics of the 1940s (Azucena and the first modern magazines for girls (Florita and Sissi, we analyse the content of this publication. In this analysis we perceive how Rosas blancas extend certain myths while those cartoons introduce new perspectives in line with what was happening in the Spanish society.

  7. Proceedings of the tenth scientific meeting at Bahia Blanca, 2-6 november 1981

    International Nuclear Information System (INIS)

    1984-06-01

    Compilation of 64 short papers by different authors, arranged in 5 sections, including the following groups of subjects: experimental reactors; instrumentation and control; nuclear and radiological safety; radioisotopes and radiations; nuclear power plants, and quality assurance. These papers deal with developments carried out at the National Atomic Energy Commission (CNEA) and firms related to Nuclear Programme. (R.J.S.) [es

  8. Mössbauer studies on some Argentinian soil: Mollisols from Bahia Blanca

    Science.gov (United States)

    Saragovi, C.; Labenski, F.; Duhalde, S. M.; Acebal, S.; Venegas, R.

    1994-12-01

    Clay fractions of a Mollisol sample as is, treated with ammonium oxalate (AO), with dithionite-citrate-bicarbonate (DCB) and with dithionite-ethilene-diamine-tetraacetic acid (D-EDTA) methods, were studied. Illite-montmorillonites together with hematites, goethites and maghemites, all of the AI-substituted and with a wide range of sizes, were identified. It is found that the AO attack extracts little iron, whereas the other two attacks extract the magnetic signal. Furthermore, the DCB attack facilitates the reduction of the Fe3+ ions, while the D-EDTA method does not. Instead, this attack extracts more clay mineral Fe ions. A comparison with large grain soil samples is made.

  9. Cordillera Blanca: glaciares en la historia

    Directory of Open Access Journals (Sweden)

    1995-01-01

    Full Text Available CORDILLERE BLANCHE - DES GLACIERS DANS L’HISTOIRE. La plus vaste couverture glaciaire de l’entre-tropiques n’apparaît comme un objet d’études que très tard, à la fin du XIXème siècle et, surtout grâce aux expéditions austro-allemandes, à partir des années 1930-1940. Le développement de l’alpinisme et un grand nombre de catastrophes meurtrières associées à la dynamique de ces glaciers (rupture de lacs de barrage morainique, avalanches ont attiré l’attention sur eux et suscité des recherches glaciologiques. En 1980, ils comptent parmi les mieux surveillés des glaciers tropicaux, d’abord grâce à un programme d’étude développé par les Péruviens eux-mêmes. à un moment où le réchauffement global fait craindre un recul très important de la glaciation dans la zone tropicale, les glaciers de la Cordillère Blanche deviennent d’excellents indicateurs de l’évolution climatique en cours et la ressource en eau qui leur est associée constitue à la fois un sujet d’étude et un enjeu économique de haute importance. La más vasta cobertura glaciar situada entre los trópicos aparece como objeto de estudio relativamente tarde, a fines del siglo XIX, sobre todo gracias a las expediciones austro alemanas a partir de los años 1930-1940. El desarrollo del alpinismo y un gran número de catástrofes mortales asociadas a la dinámica de estos glaciares (rotura de lagunas de represa morrénica, avalanchas atrajeron la atención y suscitaron investigaciones glaciológicas. En 1980, se encuentran entre los mejor monitoreados de los glaciares tropicales, primero, gracias a un programa de estudio desarrollado por los peruanos. En un momento en que el recalentamiento global hace temer un retroceso muy importante de la glaciación en la zona tropical, los glaciares de la Cordillera Blanca se convierten en excelentes indicadores de la evolución climática en curso y el recurso hídrico que se les asocia constituye a la vez un tema

  10. Detección molecular y análisis filogenético de Hepatozoon canis (Eucoccidiorida: Haemogregarinidae en perros clínicamente sanos de Bahía Blanca (Buenos Aires

    Directory of Open Access Journals (Sweden)

    CICUTTIN GL

    2017-06-01

    Full Text Available Las enfermedades caninas causadas por protozoarios y transmitidas por garrapatas representan un importante problema en medicina veterinaria. El objetivo del estudio fue detectar molecularmente Hepatozoon spp., Babesia spp. y Theileria spp. en perros clínicamente sanos de distintas regiones de Argentina y analizar la diversidad genética de los hallazgos obtenidos. Se analizaron 163 muestras de ADN de sangre de perros (40 de Ciudad Autónoma de Buenos Aires; 33 de Bahía Blanca, Buenos Aires; 15 de Castelli, Chaco; 27 de Salsipuedes, Córdoba; 40 de Merlo, San Luis; y 8 de San Miguel, Corrientes. Mediante una PCR que amplifica un fragmento variable (460-540 pb del gen ARNr 18S incluyendo la región V4 de los géneros Hepatozoon, Babesia y Theileria, el 12,1 % (4/33 de los perros de Bahía Blanca (Buenos Aires resultaron positivos. Las secuencias obtenidas se identificaron como Hepatozoon canis y resultaron filogenéticamente similares a hallazgos en Sudamérica y en el resto del mundo. El estudio de H. canis en Argentina mediante técnicas moleculares de diagnóstico junto con el análisis filogenético resulta de suma importancia para conocer la situación de este patógeno en el país. SUMMARY. Molecular detection and phylogenetic analysis of Hepatozoon canis (Eucoccidiorida: Haemogregarinidae infecting healthy dogs from Bahia Blanca (Buenos Aires. Tick-borne protozoan canine diseases represent a major problem in veterinary medicine. The aim of the study was to detect molecularly Hepatozoon spp., Babesia spp. and Theileria spp. in clinically healthy dogs from different regions of Argentina and to analyze the genetic diversity of the findings. DNAs extracted from 163 blood samples from dogs (40 from Buenos Aires city; 33 from Bahia Blanca, Buenos Aires; 15 from Castelli, Chaco; 27 from Salsipuedes, Córdoba; 40 from Merlo, San Luis; and 8 of San Miguel, Corrientes were studied by PCR amplifying a variable fragment (460-540 bp of the 18S r

  11. ENCUENTROS Y DESENCUENTROS EN UN ESPACIO DE BORDE: el caso del rururbano de la ciudad de Bahía Blanca, Provincia de Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Claudia Avelina Sereno

    2016-08-01

    Because of their boundary condition, rururban areas are subject to mobile and changing phenomena. Said phenomena are caused by the pressure exerted by real estate agents, urban planning policies, and economic sectors agents such as industries or other businesses interested in these types of zones. Rururban areas are also under the influence of economic globalization, productive restructuring, and technological innovations. These last ones stablish a rupture in the, so far, predominant spatial logic by causing changes in the territories’ dynamic. The objective of this article is to analyze Bahia Blanca City’s rururban as a zone where socio-spatial conflicts are generated. Specially, conflicts related to the advance of urbanization over the city’s boundaries and also those that are a consequence of the global logic impact. The main interest is to identify and observe the ways in which residents perceive and experience these missed encounters. To do so, a qualitative methodology is used. This methodology was chosen because it takes into account the observation of the territory and the implementation of semi-structured interviews to the residents of the Bahia Blanca’s rururban. Keywords: Rururban Area; Socio-spatial Conflicts; Experience; Perception.

  12. Estuary Data Mapper (EDM)

    Science.gov (United States)

    Estuary Data Mapper is a tool for geospatial data discovery, visualization, and data download for any of the approximately 2,000 estuaries and associated watersheds in along the five US coastal regions

  13. Climate Ready Estuaries

    Science.gov (United States)

    Information on climate change impacts to different estuary regions, tools and resources to monitor changes, and information to help managers develop adaptation plans for risk management of estuaries and coastal communities.

  14. THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL

    Energy Technology Data Exchange (ETDEWEB)

    G.J. Saulnier Jr; W. Statham

    2006-03-10

    The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. the Pena Blanca Natural Analogue Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following characteristics as compared to the Yucca Mountain repository site. (1) Analogous source: UO{sub 2} uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geologic setting: fractured, welded, and altered rhyolitic ash flow tuffs overlying carbonate rocks; (3) Analogous climate: Semiarid to arid; (4) Analogous geochemistry: Oxidizing conditions; and (5) Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table. The Nopal I deposit is approximately 8 {+-} 0.5 million years old and has been exposed to oxidizing conditions during the last 3.2 to 3.4 million years. The Pena Blanca Natural Analogue Model considers that the uranium oxide and uranium silicates in the ore deposit were originally analogous to uranium-oxide spent nuclear fuel. The Pena Blanca site has been characterized using field and laboratory investigations of its fault and fracture distribution, mineralogy, fracture fillings, seepage into the mine adits, regional hydrology, and mineralization that shows the extent of radionuclide migration. Three boreholes were drilled at the Nopal I mine site in 2003 and these boreholes have provided samples for lithologic characterization, water-level measurements, and water samples for laboratory

  15. THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL

    International Nuclear Information System (INIS)

    G.J. Saulnier Jr; W. Statham

    2006-01-01

    The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. the Pena Blanca Natural Analogue Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following characteristics as compared to the Yucca Mountain repository site. (1) Analogous source: UO 2 uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geologic setting: fractured, welded, and altered rhyolitic ash flow tuffs overlying carbonate rocks; (3) Analogous climate: Semiarid to arid; (4) Analogous geochemistry: Oxidizing conditions; and (5) Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table. The Nopal I deposit is approximately 8 ± 0.5 million years old and has been exposed to oxidizing conditions during the last 3.2 to 3.4 million years. The Pena Blanca Natural Analogue Model considers that the uranium oxide and uranium silicates in the ore deposit were originally analogous to uranium-oxide spent nuclear fuel. The Pena Blanca site has been characterized using field and laboratory investigations of its fault and fracture distribution, mineralogy, fracture fillings, seepage into the mine adits, regional hydrology, and mineralization that shows the extent of radionuclide migration. Three boreholes were drilled at the Nopal I mine site in 2003 and these boreholes have provided samples for lithologic characterization, water-level measurements, and water samples for laboratory analysis

  16. THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL

    Energy Technology Data Exchange (ETDEWEB)

    G. Saulnier and W. Statham

    2006-04-16

    The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. The Pena Blanca Natural Analogue Performance Assessment Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash-flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following analogous characteristics as compared to the Yucca Mountain repository site: (1) Analogous source--UO{sub 2} uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geology--(i.e. fractured, welded, and altered rhyolitic ash-flow tuffs); (3) Analogous climate--Semiarid to arid; (4) Analogous setting--Volcanic tuffs overlie carbonate rocks; and (5) Analogous geochemistry--Oxidizing conditions Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table.

  17. THE PENA BLANCA NATURAL ANALOGUE PERFORMANCE ASSESSMENT MODEL

    International Nuclear Information System (INIS)

    G. Saulnier; W. Statham

    2006-01-01

    The Nopal I uranium mine in the Sierra Pena Blanca, Chihuahua, Mexico serves as a natural analogue to the Yucca Mountain repository. The Pena Blanca Natural Analogue Performance Assessment Model simulates the mobilization and transport of radionuclides that are released from the mine and transported to the saturated zone. The Pena Blanca Natural Analogue Performance Assessment Model uses probabilistic simulations of hydrogeologic processes that are analogous to the processes that occur at the Yucca Mountain site. The Nopal I uranium deposit lies in fractured, welded, and altered rhyolitic ash-flow tuffs that overlie carbonate rocks, a setting analogous to the geologic formations at the Yucca Mountain site. The Nopal I mine site has the following analogous characteristics as compared to the Yucca Mountain repository site: (1) Analogous source--UO 2 uranium ore deposit = spent nuclear fuel in the repository; (2) Analogous geology--(i.e. fractured, welded, and altered rhyolitic ash-flow tuffs); (3) Analogous climate--Semiarid to arid; (4) Analogous setting--Volcanic tuffs overlie carbonate rocks; and (5) Analogous geochemistry--Oxidizing conditions Analogous hydrogeology: The ore deposit lies in the unsaturated zone above the water table

  18. Space Radar Image of Bahia

    Science.gov (United States)

    1994-01-01

    This is a color composite image of southern Bahia, Brazil, centered at 15.22 degree south latitude and 39.07 degrees west longitude. The image was acquired by the Spaceborne Imaging Radar-C/X-band Synthetic Aperture Radar aboard the space shuttle Endeavour on its 38th orbit of Earth on October 2, 1994. The image covers an area centered over the Una Biological Reserve, one the largest protected areas in northeastern Brazil. The 7,000-hectare reserve is administered by the Brazilian Institute for the Environment and is part of the larger Atlantic coastal forest, a narrow band of rain forest extending along the eastern coast of Brazil. The Atlantic coastal forest of southern Bahia is one of the world's most threatened and diverse ecosystems. Due to widespread settlement, only 2 to 5 percent of the original forest cover remains. Yet the region still contains an astounding variety of plants and animals, including a large number of endemic species. More than half of the region's tree species and 80 percent of its animal species are indigenous and found nowhere else on Earth. The Una Reserve is also the only federally protected habitat for the golden-headed lion tamarin, the yellow-breasted capuchin monkey and many other endangered species. In the past few years, scientists from Brazilian and international conservation organizations have coordinated efforts to study the biological diversity of this region and to develop practical and economically viable options for preserving the remaining primary forests in southern Bahia. The shuttle imaging radar is used in this study to identify various land uses and vegetation types, including remaining patches of primary forest, cabruca forest (cacao planted in the understory of the native forest), secondary forest, pasture and coastal mangrove. Standard remote-sensing technology that relies on light reflected from the forest canopy cannot accurately distinguish between cabruca and undisturbed forest. Optical remote sensing is also

  19. Inequality and School Reform in Bahia, Brazil

    Science.gov (United States)

    Reiter, Bernd

    2009-01-01

    This article compares public and community schools in Salvador, the state capital of Bahia, Brazil. Based on quantitative data analysis and qualitative research conducted on-site during three research trips in 2001, 2003 and 2005, the author finds that Brazil's extreme inequality and the associated concentration of state power in a few hands stand…

  20. Bahia State, Brazil : Ariculture Sector Risk Assessment

    OpenAIRE

    Arias, Diego; Caballero, Jorge

    2015-01-01

    The present study is part of an effort by the World Bank and the State of Bahia to assess agriculture sector risks as a contribution to the strategic economic development and poverty reduction agenda of the state government. It is composed of two phases: an agricultural sector risk identification and prioritization (volume one) and a risk management strategy and action plan (volume two). T...

  1. Local Estuary Programs

    Science.gov (United States)

    This page provides information about Local Individual Estuary Programs including links to their NEP homepages, social media, Comprehensive Conservation and Management Plans, and state of the bay reports.

  2. Milwaukee Estuary AOC

    Science.gov (United States)

    The rivers in the Milwaukee estuary in Wisconsin drain into Lake Michigan. Wastewater treatment plants and combined sewer overflows contribute pollution which affects fish and wildlife and recreation.

  3. Mentiras por omisión en la "raza blanca"

    Directory of Open Access Journals (Sweden)

    Ana Silvia Simesen de Bielke

    2003-01-01

    Full Text Available La razón instrumental blanca es hija legítima de la sociedad capitalista y, como tal, ha diseñado todos los ámbitos de la organización burocrática, el método científico, los distintos dispositivos del cuerpo social y los aparatos jurídicos e ideológicos. El reduccionismo liberticida, por ejemplo, no es un accidente epistemológico, sino que su vocación homogeneizadora ha respondido y responde a una forma particular de organización económica y política: la concepción reduccionista del mundo, la revolución industrial y la economía capitalista son los componentes filosófico, tecnológico y económico de un mismo proceso excluyente. El mismo, a través de sus avances científico-tecnológicos y su mentira civilizatoria, es quien va destruyendo paulatinamente nuestro oikos, nuestra simbiosis originaria con lo natural, nuestra sensibilidad, nuestra diversidad, únicos sustentos para la conservación de toda vida sobre el planeta. Quienes, como intelectuales, han desmontado esta estructura de la Razón Blanca falócrata colonizadora a través de sus dicotomías (humanidad y naturaleza, hombre y mujer, ciudad y pueblo, metrópolis y colonia, trabajo y vida, naturaleza y cultura, deben plantearse el imperativo moral de comprometerse con la denuncia pública acerca de este maridaje entre ciencia y fuerza, ciencia y militarismo, ciencia y patriarcado. Es el momento del desmontaje también de todas las ‘razones’ descendientes de la Razón Blanca: ¿porqué no pensar también en nuestra ‘razón académica’?

  4. Penobscot Estuary (Maine) Monitoring

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — NOAA's NEFSC collects fisheries data from the Penobscot Estuary using several types of fishing gear. The data is used to determine species presence, relative...

  5. Pena Blanca uranium deposits and ash-flow tuffs relationship

    International Nuclear Information System (INIS)

    Magonthier, M.

    1987-01-01

    The Pena Blanca uranium deposits (Chihuahua, Mexico) are associated with a Tertiary sequence of ash-flow tuffs. Stratigraphic control is dominant and uranium mineralization occurs in stratiform and fracture-controlled deposits within 44 My-old units: Nopal Rhyolite and Escuadra Rhyolite. These units consist of highly vapor-phase crystallized ash-flow tuffs. They contain sanidine, quartz and granophyric phenocrysts, and minor ferromagnesian silicates. Nopal and Escuadra units are high-silica alkali-rich rhyolites that have a primary potassic character. The trace-element chemistry shows high concentrations in U-Th-Rb-Cs and low contents in Ba-Sr-Eu. These chemical properties imply a genetic relationship between deposits and host-units. The petrochemical study show that the Nopal Rhyolite and Escuadra Rhyolite are the source of U and of hydrothermal solutions [fr

  6. Proglacial Groundwater Flux and Storage in the Cordillera Blanca, Peru

    Science.gov (United States)

    Chavez, D.; McKenzie, J. M.; Baraer, M.; Mark, B. G.

    2012-12-01

    As tropical glaciers continue to rapidly retreat in the Cordillera Blanca, Peru, dry-season water resources are becoming more dependent on groundwater baseflow. Therefore, understanding the flux and storage of proglacial groundwater is necessary to forecast how groundwater storage can offset decreasing water resources. Recent studies of the Rio Santa Watershed, which drains the western slopes of the Cordillera Blanca, have identified that groundwater is the largest contributor to outflow from many watersheds during the dry season and that the flux of groundwater is temporarily available (clay to silt sized glaciolacustrine material at each drill site. This layer was typically less than 5 m in thickness and had a low hydraulic conductivity (clay layer were water bearing units of course material (either well-sorted sand/gravel or talus deposits) with an average hydraulic conductivity of 10-5 m/s. Additionally numerous discontinuous sand lenses and localized glaciofluvial gravel deposits were observed within the clay layer. The glaciolacustrine deposits behave as confining units that were capable of generating localized artesian conditions in the coarse grain units. The occurrence of the clay units adjacent to the main stream channels suggests that the flatness of the valley floors is not the result of river meander. The coarse grained units have the potential to act as important aquifers with significant groundwater storage and flow. Our preliminary findings indicate that the course grained units are important hydrogeological conduits with the ability to buffer low flow conditions in proglacial streams during the dry season. We present a new schematic model of how groundwater moves through these important proglacial environments, providing temporal storage of glacial meltwater and precipitation.

  7. Media, State and Society in Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Julián Durazo Herrmann

    2016-08-01

    Full Text Available In this paper, I seek to assess the role of the media in ongoing subnational democratization processes from a State-in-society perspective. I use the case of Bahia, a state in North-Eastern Brazil, to assess ownership and social access to the media, the media’s autonomy from both the State and social actors as well as how conflicts between public interest and private profit are solved. We will thus understand the role of subnational media in sustaining pluralism and in providing independent sources of information, two critical dimensions of democracy.

  8. About Estuary Data Mapper (EDM)

    Science.gov (United States)

    Estuary Data Mapper is a tool for geospatial data discovery, visualization, and data download for any of the approximately 2,000 estuaries and associated watersheds in along the five US coastal regions.

  9. O EXTREMO SUL DA BAHIA QUE NÃO PERTENCE A BAHIA

    Directory of Open Access Journals (Sweden)

    Sebastião Pinheiro Gonçalves de Cerqueira Neto

    2012-04-01

    Full Text Available O uso de alguns elementos culturais na análise espacial é mais um caminho dentro das ramificações da geografia que busca a compreensão da dinâmica que o homem impõe ao espaço nos diferentes momentos da história. Em certos casos de estudos regionais o mapeamento cultural é utilizado como método para organizar um Estado, como por exemplo, os territórios de identidade da Bahia. Mas, atualmente, a maior mobilidade das pessoas tem causado dificuldade da manutenção da cultura e dessa forma a sua aplicabilidade é limitada em determinados territórios. A trajetória geográfica do Extremo Sul da Bahia mostra que a ausência de uma identidade cultural regional produziu um cenário de autonomia fazendo com que essa região não mantenha ligações com os vetores que caracterizam a cultura baiana. Palavras chave: espaço, cultura, Extremo Sul da Bahia, região.

  10. Market study of pipe gas for the Bahia State, Brazil

    International Nuclear Information System (INIS)

    1992-09-01

    The energy market that will be conquered by the natural gas in Bahia State is identified, allowing measure the potentiality of gas industry and the gas supply, that the State will plead to the Federal Government. (C.G.C.)

  11. Role of erosion and isostasy in the Cordillera Blanca uplift: Insights from landscape evolution modeling (northern Peru, Andes)

    Science.gov (United States)

    Margirier, Audrey; Braun, Jean; Robert, Xavier; Audin, Laurence

    2018-03-01

    The processes driving uplift and exhumation of the highest Peruvian peaks (the Cordillera Blanca) are not well understood. Uplift and exhumation seem closely linked to the formation and movement on the Cordillera Blanca normal fault (CBNF) that delimits and shapes the western flank of the Cordillera Blanca. Several models have been proposed to explain the presence of this major normal fault in a compressional setting, but the CBNF and the Cordillera Blanca recent rapid uplift remain enigmatic. Whereas the Cordillera Blanca morphology demonstrates important erosion and thus a significant mass of rocks removal, the impact of erosion and isostasy on the evolution of the Cordillera Blanca uplift rates has never been explored. We address the role of erosion and associated flexural rebound in the uplift and exhumation of the Cordillera Blanca with numerical modeling of landscape evolution. We perform inversions of the broad features of the present-day topography, total exhumation and thermochronological data using a landscape evolution model (FastScape) to provide constraints on the erosion efficiency factor, the uplift rate and the temperature gradient. Our results evidence the not negligible contribution of erosion and associated flexural rebound to the uplift of the Cordillera Blanca and allow us to question the models previously proposed for the formation of the CBNF.

  12. Structure of Sierra Blanca (Alpujarride Complex, west of the Betic Cordillera

    Directory of Open Access Journals (Sweden)

    Andreo, B.

    1995-04-01

    Full Text Available Sierra Blanca, situated in the SW of Málaga, forms part of the Blanca unit, belonging to the Alpujarride Complex of the Betic Cordillera. Its lithologic sequences are made up of a group of migmatites, gneisses and schists and an upper formation of marbles (white dolomitic and the bottom and blue calcareous towards the top, linked with a transitional contact. The structure of Sierra Blanca is comprised of folds, generally isoclinal, with reversed limbs and with important tectonic transpositions, the direction of which is approximately E-W in the eastern area and N-S and E-W in the West. In both areas the folds present opposing vergences, consistently towards the interior of the sierra. The origin of these structures is explained with a model of westerly movements of the Blanca unit, in relation to the Los Reales unit, with the formation of frontal and lateral folds. In its advancement, the western part of Sierra Blanca underwent an important anti-clockwise rotation responsible for the co-existence of folds in N-S and E-W directions. These structures occurred under ductile conditions, owing to the presence of important overthrusting peridotitic masses of the Los Reales unit. This model of westerly displacement is inserted in the process undergone by the Betic-Rif Internal Zones (with Blanca and Los Reales units included which occurred at the end of the Oligocene-Early Miocene when the Gibraltar arch began to be formed.Sierra Blanca, situada al SW de Málaga, forma parte de la unidad de Blanca que pertenece al complejo Alpujárride de la Cordillera Bética. Su secuencia litológica está compuesta por un conjunto inferior de migmatitas, gneises y esquistos, y por una formación superior de mármoles, blancos dolomíticos en la base y mármoles calizos azules hacia la parte superior, entre los que existe un tránsito gradual. La estructura de Sierra Blanca está formada por pliegues, generalmente isoclinales, con flancos invertidos que muestran

  13. Nueva institucionalidad y proyección local tras la privatización portuaria argentina: Los casos de Bahía Blanca y Rosario

    Directory of Open Access Journals (Sweden)

    Silvia Gorenstein

    2005-05-01

    Full Text Available Este artículo examina la estructura institucional-regulatoria resultante de la privatización portuaria efectuada en Argentina durante los años noventa, en el marco de las transformaciones sectoriales a escala mundial y del andamiaje conceptual que sostiene nuevos formatos institucionales para reemplazar el rol antes desempeñado por el Estado nacional. ¿Cómo funciona la nueva institución portuaria, con parcelas de poder compartidas entre el sector público y los segmentos privados involucrados en la actividad? ¿En qué medida esta institucionalidad ha operado sobre las condiciones de governance local? Desde estos interrogantes centrales, el artículo se focaliza en las experiencias de los puertos de Bahía Blanca y Rosario, analizando las implicancias de una reconfiguración institucional modelada por la valorización del capital privado y mediada por el ejercicio de un poder público compartido entre dos niveles territoriales (provincia-municipio. De aquí se infieren temas que replantean la visión del puerto como fuerza propulsora del desarrollo económico territorial, y que se discuten revisando la naturaleza de los vínculos ciudad-puerto y los alcances de su proyección en la economía local desde la reformaThis paper analyzes the institutional and regulatory structures emerging from port privatization during the 90s in Argentina. The study departs from main sector transformations taking place at global scale and is based on the conceptual framework that sustains new institutional forms replacing former national government role. This new port institution shares power between public and private actors. How does it function? In what sense this new institution influences on local governance conditions? Departing from these central questions, this article focuses in Bahia Blanca and Rosario ports experiences, analyzing some consequences emerging from an institutional reform modeled by private capital valorization and mediated by a

  14. Efecto de dos agentes remineralizantes en lesiones de mancha blanca: Estudio in Vitro

    Directory of Open Access Journals (Sweden)

    Grace Maribel Chicaiza Naranjo

    2016-07-01

    Full Text Available La caries dental continúa siendo la enfermedad con mayor prevalencia en el mundo, es importante diagnosticarla y tratarla desde su estadio inicial de mancha blanca ya que es una lesión reversible. La aparición de nuevos materiales como el fosfopéptido de caseína- estabilizado de fosfato de calcio amorfo (Recaldent para remineralizar las manchas blancas nos brindan más opciones terapéuticas en Odontopediatria. Objetivo: Evaluar in-vitro la remineralización de la mancha blanca a partir de la aplicación de las pastas dentales a base de Recaldent: Mi Paste y Mi Paste Plus en dientes temporales. Materiales y métodos: Fueron utilizados 30 dientes temporales sanos obtenidos por movilidad fisiológica, divididos en Grupo A 15 dientes, Grupo B 15 dientes, en ambos grupos se generó la mancha blanca con un agente desmineralizante, para la remineralización  al grupo A se le aplicó Mi Paste, al grupo B Mi Paste Plus, se evaluó el grado de desmineralización y remineralización mediante un láser, Diagnodent, después de 10 días de la aplicación de las pastas dentales. Resultados: Se demostró que en ambos grupos existió remineralización de la mancha blanca, 14.73 grados de fluorescencia con Mi Paste y 15.67 grados con Mi Paste Plus, siendo mayor el grupo B. Conclusión: Concluyendo que, si existe remineralización de la mancha blanca a partir de la aplicación de pasta dental, Mi Paste y Mi Paste Plus con derivados de la caseína (Recaldent en dientes temporales, estudio in vitro. Logrando mejores resultados al utilizar Mi Paste Plus. 

  15. Las arquitecturas pintadas, cuando Málaga no era blanca.

    Directory of Open Access Journals (Sweden)

    Eduardo Asenjo Rubio

    2013-01-01

    Full Text Available Se atribuye a Confucio la cita, Todo tiene belleza, pero no todos la ven, y Rosario Camacho Martínez hace justicia a ese memento filosófico, pues con su magisterio ejercido desde el Departamento de Historia del Arte de la Universidad de Málaga, y su amplio conocimiento sobre las arquitecturas pintadas, hizo que muchas personas e instituciones que no veían más allá de la imperfección e incorrección técnica de este legado cultural comenzaran a valorarlo de forma positiva. Precisamente, el artículo «Cuando Málaga no era blanca: La arquitectura pintada del siglo XVIII», publicado en la revista Boletín de Arte en el año 1993 fue el inicio de muchas cosas positivas que Rosario Camacho ha aportado, no solo al conocimiento científico, sino también a la propia ciudad de Málaga. Desde esa tribuna literaria que tanta satisfacciones personales y académicas le ha dado durante toda su vida explicó su característica forma de abordar este singular patrimonio: rigor científico, análisis del dato, metodología clara y comunicación del conocimiento de forma asequible y comprensible, características ampliamente elogiadas por el desaparecido y añorado maestro Juan Antonio Ramírez, a quien le unía una estrecha amistad y un profundo reconocimiento.

  16. Deposit of molybdenum associated with uranium in Pena Blanca, Mexico

    International Nuclear Information System (INIS)

    Reyes-Cortes, M.

    1985-01-01

    The uranium-molybdenum deposits are in the Sierra Pena Blanca, 45 km north of the city of Chihuahua. The largest amounts of uranium-molybdenum ore are found in the area of Las Margaritas-Puerto III. The ratio of molybdenum mineralization to uranium is 2:1 in this area and the deposits are distributed at depths of 55-100 m in ignimbritic rocks of the so called Escuadra Formation. This volcanic unit consists of an altered crystalline-lithic ash-flow tuff of Oligocene age. The molybdenum mineral occurs as powellite (CaMoO 4 ) and is found predominantly in two size ranges: phenocrysts 0.1-20 mm in diameter are abundant in the upper part of the deposit, while a material which varies between cryptocrystalline and amorphous predominates in the lower part. This latter material can easily be identified inside the mine by its strong orange fluorescence; it is also easy to recover by leaching. In contrast, the metallurgical process of recovery by leaching of the phenocrystalline portion of the powellite has so far presented problems. Powellite is generally found in association with carnotite, margaritasite and uranophane, and its mineralization consists of disseminated lumps, druses, crustifications and veins; frequently, it partially replaces the phenocrysts of argillized feldspars of the Escuadra Formation. Fractured and brecciated zones with intense oxidation of jarosite, haematite, limonite and goethite sometimes show high U-Mo concentrations; on other occasions the concentration is found with alunite at the contact between the ignimbrite and the layers of argillized vitrophyre. The mineralizations of fluorite, pyrite, jarosite, alunite and opal are indicative of hydrothermal deposition, possibly at low temperature with supergene or geothermal alterations. (author)

  17. The Mandovi and Zuari estuaries

    Digital Repository Service at National Institute of Oceanography (India)

    Shetye, S.R.; DileepKumar, M.; Shankar, D.

    of their extensive use for fisheries, agriculture, transportation, dumping of waste, etc. The two estuaries have since continued to attract scientific curiosity over the years, thanks in large measure to support from national and local funding agencies. As a... made so far to simulate them in numerical models, and characteristics of stratification and mixing. These are followed by chapters that examine the fun- damentals of biology and chemistry of the estuaries. A distinct characteristic of the estuaries...

  18. Ichthyofauna in an estuary of the Mataripe area, Todos os Santos Bay, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    June Ferraz Dias

    2011-03-01

    Full Text Available The community structure and dynamics as well as some biological parameters of selected species of the ichthyofauna of the Mataripe estuarine region affected by the Landulfo Alves Oil Refinery (RLAM were analyzed. Twenty stations were sampled with a gillnet in five different periods: August and December 2003, March and July/August 2004 and January 2005. Thirty-five actinopterygian species and one elasmobranch species were recorded, Oligoplites saurus, Diapterus rhombeus, Lutjanus synagris and Scomberomorus brasiliensis among them, on all the campaigns. A total of 1368 specimens, weighing 36.10 kg, were caught. The ichthyofauna total biomass was greater, in weight, on the eastern side of the study region, especially at the stations close to the shoals/reefs and the rocky bottom. A similar pattern was also observed for the diversity values. In general, low evenness and diversity were observed in the area studied, possibly as a result of the fishing gear used. D. rhombeus juveniles dominated in all but one of the samplings (July 2004, in which latter Cyclichthys spinosus was dominant. Carangids and species associated with consolidated bottoms were observed, although in small numbers, throughout the study period. In spite of the limitations imposed by the gear used for sampling, the estuarine area influenced by the RLAM was seen to play a role as a growth area for the great majority of species, especially the mojarra (D. rhombeus, but it offers no fishing potential due to the prevalence of young and small individuals. Evidence of imminent spawning was recorded for Pomadasys corvinaeformis in August 2003, and recent spawning in March 2004 for Oligoplites saurus. Further, mature individuals occurred in insufficient numbers to permit population level evaluation.A estrutura e dinâmica da ictiofauna amostrada na região estuarina de Mataripe sob a influência da Refinaria Landulpho Alves-Mataripe (RLAM foi analisada. Vinte estações foram amostradas com rede-de-abalo em cinco períodos: agosto e dezembro de 2003, março e julho/agosto de 2004 e em janeiro de 2005. Foi verificada a ocorrência de 35 espécies de actinopterígios e uma de elasmobrânquio, sendo que Oligoplites saurus, Diapterus rhombeus, Lutjanus synagris e Scomberomorus brasiliensis ocorreram em todas as campanhas. Um total de 1368 espécimes, pesando 36,10 kg, foram capturados. A biomassa total da ictiofauna foi maior no lado leste da região estudada, especialmente nas estações próximas de coroas/recifes e fundos consolidados. Um padrão similar foi também observado para os valores de diversidade. De maneira geral, baixa equitatividade e diversidade foram observadas na área de estudo, possivelmente como o resultado da rede utilizada. Ocorreu a dominância de formas juvenis de Diapterus rhombeus em todas as campanhas exceto uma (julho de 2004, quando Cyclichthys spinosus foi a espécie dominante. Embora em pequeno número, a presença de carangídeos e espécies associadas a fundos consolidados foi observada durante todo o período de estudo. Apesar das limitações impostas pelo aparelho de coleta, o papel da região estuarina sob a influência da RLAM, durante os períodos amostrados, foi classificado como área de crescimento para a maioria das espécies, principalmente a carapeba (D. rhombeus, não oferecendo potencial pesqueiro, dada a ocorrência de indivíduos jovens e de pequeno porte. Evidência de desova iminente foi relatada para Pomadasys corvinaeformis em agosto de 2003, e de desova recente em março de 2004 para Oligoplites saurus, somando-se a indivíduos maduros ocorrendo em números não-representativos para uma avaliação em nível populacional.

  19. Ichthyofauna in an estuary of the Mataripe area, Todos os Santos Bay, Bahia, Brazil

    OpenAIRE

    Dias, June Ferraz; Gonçalves, Aline Mariane; Fernandez, Wellington Silva; Silbiger, Helcy Lylian Nogueira; Fiadi, Carla Bertolucci; Schmidt, Thassya Christina dos Santos

    2011-01-01

    The community structure and dynamics as well as some biological parameters of selected species of the ichthyofauna of the Mataripe estuarine region affected by the Landulfo Alves Oil Refinery (RLAM) were analyzed. Twenty stations were sampled with a gillnet in five different periods: August and December 2003, March and July/August 2004 and January 2005. Thirty-five actinopterygian species and one elasmobranch species were recorded, Oligoplites saurus, Diapterus rhombeus, Lutjanus synagris and...

  20. Ecology of estuaries

    International Nuclear Information System (INIS)

    Kennish, M.J.

    1992-01-01

    Ecology of Estuaries: Anthropogenic Effects represents the most definitive and comprehensive source of reference information available on the human impact on estuarine ecosystems. The book discusses both acute and insidious pollution problems plaguing these coastal ecotones. It also provides a detailed examination of the deleterious and pervasive effects of human activities on biotic communities and sensitive habitat areas in estuaries. Specific areas covered include organic loading, oil pollution, polynuclear aromatic hydrocarbons, chlorinated hydrocarbons, heavy metals, dredging and dredge-spoil disposal, radionuclides, as well as other contaminants and processes. The diverse components of these anthropogenic influences are assembled in an organized framework and presented in a clear and concise style that will facilitate their understanding

  1. Sediment Trapping in Estuaries

    Science.gov (United States)

    Burchard, Hans; Schuttelaars, Henk M.; Ralston, David K.

    2018-01-01

    Estuarine turbidity maxima (ETMs) are generated by a large suite of hydrodynamic and sediment dynamic processes, leading to longitudinal convergence of cross-sectionally integrated and tidally averaged transport of cohesive and noncohesive suspended particulate matter (SPM). The relative importance of these processes for SPM trapping varies substantially among estuaries depending on topography, fluvial and tidal forcing, and SPM composition. The high-frequency dynamics of ETMs are constrained by interactions with the low-frequency dynamics of the bottom pool of easily erodible sediments. Here, we use a transport decomposition to present processes that lead to convergent SPM transport, and review trapping mechanisms that lead to ETMs at the landward limit of the salt intrusion, in the freshwater zone, at topographic transitions, and by lateral processes within the cross section. We use model simulations of example estuaries to demonstrate the complex concurrence of ETM formation mechanisms. We also discuss how changes in SPM trapping mechanisms, often caused by direct human interference, can lead to the generation of hyperturbid estuaries.

  2. 33 CFR 165.771 - Safety Zone; Bahia de Ponce, Puerto Rico

    Science.gov (United States)

    2010-07-01

    ..., Puerto Rico 165.771 Section 165.771 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND... Zone; Bahia de Ponce, Puerto Rico (a) Location. The following area is established as a safety zone... Bahia de Ponce, on approach to or departure from the Puerto de Ponce waterfront facility in Bahia de...

  3. LA COMPRENSIÓN DEL TERRITORIO A PARTIR DEL MODELO DE FORMACIÓN SOCIO ESPACIAL DESDE LA PRÁCTICA DE LA HORTICULTURA EN EL PERIURBANO DE BAHÍA BLANCA, ARGENTINA

    Directory of Open Access Journals (Sweden)

    María Amalia Lorda

    2016-03-01

    Full Text Available El desarrollo de la actividad hortícola en las ciudades argentinas se construye en un entramado que se remonta a la fundación misma de cada lugar, como una actividad propia de quienes buscan originar su propio sustento. Con el crecimiento de las ciudades, el territorio cambia, nuevos usos se observan, así como la llegada de otras personas -inmigrantes- que sin duda impregnan de especificidades a un nuevo territorio en construcción. En el periurbano de Bahía Blanca, la horticultura se nutre de distintas oleadas de inmigrantes, quienes plasman en el territorio saberes y prácticas singulares. El aporte de la geografía social francesa es de gran valor para la comprensión de las distintas lógicas socio-espaciales que suceden. El modelo de formación socio espacial que se aplica permite comprender el territorio, a partir de observaciones en el terreno y entrevistas a los actores que territorializan con sus prácticas un modo de pensar el territorio. Palabras clave: Periurbano; Territorio; Formación Socio-espacial; Actividad Hortícola.   THE COMPREHENSION OF THE TERRITORY FROM THE MODEL OF FORMATION SPATIAL PARTNER FROM THE PRACTICE OF THE HORTICULTURE THE PERIURBANO OF BAHÍA BLANCA, ARGENTINA ABSTRACT The development of horticulture in the Argentine cities is built on a framework that goes back to the very foundation of every place, as an activity of those who seek to lead their own livelihood. With the growth of cities, the territory changes, new uses are observed, and the arrival of others -inmigrantes- undoubtedly imbued with specificities into new territory under construction. In the periurban horticulture Bahia Blanca, is nourished by different waves of immigrants, who reflected on the territory unique knowledge and practices. The contribution of the French social geography is of great value for the understanding of different socio-spatial logics that happen. The model of socio spatial information that applies to understanding the

  4. Thecamoebians: occurrence and distribution in Iguape Bay/BTS – Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Cláudia Ferreira da Cruz

    2012-09-01

    Full Text Available The Iguape Bay (12º00’ – 13º00’S and 38º30’ – 39º30’ is an estuary located at the mouth of the Paraguaçu River, inside Todos os Santos Bay (BTS, in Bahia, Brazil. It is 30km downstream from the Pedra do Cavalo Dam, which is the second largest dam in Brazil. The water in Iguape Bay is influenced by ocean tides originating from the BTS and the discharge of the Paraguaçu River. The effects of the currents as well as the variation in the outflow from the Pedra do Cavalo Dam have intensified the natural stress of this paralic environment. The main goal of this study was to investigate the distribution of Thecamoeba species present in the bottom sediments of Iguape Bay, in order to produce data that can be used to interpret the processes operating in this ecologically complex environment. The density of the living and dead species of Thecamoeba was determined by the volume of sediment collected, and the diversity index, constancy, evenness and richness of Thecamoeba were calculated. Sedimentological analyses were also performed in order to classify sediment types in the selected profiles.

  5. STRATIGRAPHY OF THE PB-1 WELL, NOPAL 1 URANIUM DEPOSIT, PENA BLANCA, CHIHUAHUA, MEXICO

    International Nuclear Information System (INIS)

    P. Dobson

    2005-01-01

    The objectives of this report are: (1) Stratigraphic study part of integrated research project examining migration of radionuclides at Pena Blanca; (2) Immediate objectives of study include: locate stratigraphic contacts in third dimension; measure rock properties (matrix permeability, porosity, mineralogy, cation exchange capacity) of cored section; determine fracture frequency and orientation; (3) Results of study serve as primary inputs to flow and transport models

  6. STRATIGRAPHY OF THE PB-1 WELL, NOPAL 1 URANIUM DEPOSIT, PENA BLANCA, CHIHUAHUA, MEXICO

    Energy Technology Data Exchange (ETDEWEB)

    P. Dobson

    2005-09-14

    The objectives of this report are: (1) Stratigraphic study part of integrated research project examining migration of radionuclides at Pena Blanca; (2) Immediate objectives of study include: locate stratigraphic contacts in third dimension; measure rock properties (matrix permeability, porosity, mineralogy, cation exchange capacity) of cored section; determine fracture frequency and orientation; (3) Results of study serve as primary inputs to flow and transport models.

  7. Glacial lake outburst floods in the area of Huarás, Cordillera Blanca, Peru

    Czech Academy of Sciences Publication Activity Database

    Vilímek, V.; Zapata, M. L.; Klimeš, Jan

    2005-01-01

    Roč. 39, - (2005), s. 115-124 ISSN 0081-6434 Grant - others:GA MŠk(CZ) LA 157 Institutional research plan: CEZ:AV0Z30460519 Keywords : GLOFs * Cordillera Blanca * Peru Subject RIV: DC - Siesmology, Volcanology, Earth Structure

  8. Vascular plants and a brief history of the Kiowa and Rita Blanca National Grasslands

    Science.gov (United States)

    Donald L. Hazlett; Michael H. Schiebout; Paulette L. Ford

    2009-01-01

    Administered by the USDA Forest Service, the Kiowa and Rita Blanca National Grasslands occupy 230,000 acres of public land extending from northeastern New Mexico into the panhandles of Oklahoma and Texas. A mosaic of topographic features including canyons, plateaus, rolling grasslands and outcrops supports a diverse flora. Eight hundred twenty six (826) species of...

  9. Regional Analysis of the Hazard Level of Glacial Lakes in the Cordillera Blanca, Peru

    Science.gov (United States)

    Chisolm, Rachel E.; Jhon Sanchez Leon, Walter; McKinney, Daene C.; Cochachin Rapre, Alejo

    2016-04-01

    The Cordillera Blanca mountain range is the highest in Peru and contains many of the world's tropical glaciers. This region is severely impacted by climate change causing accelerated glacier retreat. Secondary impacts of climate change on glacier retreat include stress on water resources and the risk of glacial lake outburst floods (GLOFs) from the many lakes that are forming and growing at the base of glaciers. A number of GLOFs originating from lakes in the Cordillera Blanca have occurred over the last century, several of which have had catastrophic impacts on cities and communities downstream. Glaciologists and engineers in Peru have been studying the lakes of the Cordillera Blanca for many years and have identified several lakes that are considered dangerous. However, a systematic analysis of all the lakes in the Cordillera Blanca has never before been attempted. Some methodologies for this type of systematic analysis have been proposed (eg. Emmer and Vilimek 2014; Wang, et al. 2011), but as yet they have only been applied to a few select lakes in the Cordillera Blanca. This study uses remotely sensed data to study all of the lakes of the Glacial Lake Inventory published by the Glaciology and Water Resources Unit of Peru's National Water Authority (UGRH 2011). The objective of this study is to assign a level of potential hazard to each glacial lake in the Cordillera Blanca and to ascertain if any of the lakes beyond those that have already been studied might pose a danger to nearby populations. A number of parameters of analysis, both quantitative and qualitative, have been selected to assess the hazard level of each glacial lake in the Cordillera Blanca using digital elevation models, satellite imagery, and glacier outlines. These parameters are then combined to come up with a preliminary assessment of the hazard level of each lake; the equation weighting each parameter draws on previously published methodologies but is tailored to the regional characteristics

  10. Geologic studies in the Sierra de Pena Blanca, Chihuahua, Mexico

    Science.gov (United States)

    Reyes-Cortes, Ignacio Alfonso

    The Sierra del Cuervo has been endowed with uranium mineralization, which has attracted many geological studies, and recently the author was part of a team with the goal of selecting a site of a radioactive waste repository. The first part of the work adds to the regional framework of stratigraphy and tectonics of the area. It includes the idea of a pull apart basin development, which justifies the local great thickness of the Cuervo Formation. It includes the regional structural frame work and the composite stratigraphic column of the Chihuahua Trough and the equivalent Cretaceous Mexican Sea. The general geologic features of the NE part of the Sierra del Cuervo are described, which include the folded ignimbrites and limestones in that area; the irregular large thicknesses of the Cuervo Formation; and the western vergence of the main folding within the area. Sanidine phenocrystals gave ages of 54.2 Ma and 51.8 Ma ± 2.3 Ma. This is the first time these dates have been reported in print. This age indicates a time before the folded structures which outcrop in the area, and 44 Ma is a date after the Cuervo Formation was folded. The Hidalgoan orogeny cycle affected the rocks between this lapse of time. Since then the area has been partially affected by three tensional overlapped stages, which resulted in the actual Basin and Range physiography. The jarosite related to the tectonic activity mineralization has been dated by the Ar-Ar method and yields an age of 9.8 Ma. This is the first report of a date of mineralization timing at Pena Blanca Uranium District in the Sierra del Cuervo. These are some of the frame work features that justify the allocation of a radioactive waste repository in the Sierra del Cuervo. An alluvial fan system within the Boquilla Colorada microbasin was selected as the best target for more detailed site assessment. The study also included the measurement of the alluvium thicknesses by geoelectric soundings; studies of petrography and weathered

  11. Uranium prospecting in the State of Bahia, Brazil

    International Nuclear Information System (INIS)

    Cenachi, N.C.

    1974-01-01

    A brief description is made of the program established by CNEN (Brazilian Nuclear Energy Commission) - Brazil, for the radiogeological survey of a large area in the state of Bahia. Details of the projects carried out since 1971 are also given. Projects of aerogeophysical surveys are also mentioned [pt

  12. Experience of electric power conservation in COELBA (Bahia Electric Company)

    International Nuclear Information System (INIS)

    Bastos, A.C.F.

    1990-01-01

    The electric power crisis of Brazilian north-east in 1987 imposes the Bahia Electric Company-COELBA to management a electric power conservation. The institutional, organizational and operational aspects are presented, including the tariff system, the market, the consumption and the relation with public. (author)

  13. 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...

  14. Snakes of Cerrado localities in western Bahia, Brazil

    OpenAIRE

    de Freitas, Marco; Colli, Guarino; Entiauspe-Neto, Omar; Trinchão, Luiz; Araújo, Daniel; Lima, Tiago; de França, Daniella; Gaiga, Renato; Dias, Pedro

    2016-01-01

    We present a list of snake species found in 10 municipalities in the Cerrado of western Bahia state, Brazil. One hundred and twenty individuals of 46 species from seven families were examined. We also present a new state record for the genus Phalotris Cope, 1862 and a candidate new species for the genus Thamnodynastes Wagler, 1830.

  15. RECUPERACIÓN DE ESPACIOS URBANOS Y PERIURBANOS MEDIANTE LA IMPLEMENTACIÓN DE PARQUES-HUERTAS EN LA CIUDAD DE BAHIA BLANCA

    OpenAIRE

    Jezabel Franza; María Kraser; Daniel Paoloni; Silvina Raitzin; Gabriel Reiter

    2008-01-01

    Las ciudades crecen y generan espacios con profundos desequilibrios. Desde la acción pública existen diferentes formas de abordar esta complejidad. Una de las alternativas que en distintos espacios del territorio nacional se han desarrollado como medio de recuperación de espacios y a su vez opción de ingresos económicos para los grupos poblacionales que sufren carencias ha sido la implementación de Parques-Huerta en la experiencia rosarina. Puede decirse que esta experiencia se enmarca en...

  16. Lichenometry in the Cordillera Blanca, Peru: “Little Ice Age” moraine chronology

    Science.gov (United States)

    Solomina, Olga; Jomelli, Vincent; Kaser, Georg; Ames, Alcides; Berger, Bernhard; Pouyaud, Bernard

    2007-10-01

    This paper is a comparison and compilation of lichenometric and geomorphic studies performed by two independent teams in the Cordillera Blanca, Peru, in 1996 and 2002 on 66 "Little Ice Age" moraines of 14 glaciers. Using eleven new control points, we recalibrated the initial rapid growth phase of the previously established Rhizocarpon subgenus Rhizocarpon growth curve. This curve was then used to estimate the age of "Little Ice Age" moraines. The time of deposition of the most prominent and numerous terminal and lateral moraines on the Pacific-facing side of the Cordillera Blanca (between AD 1590 and AD 1720) corresponds to the coldest and wettest phase in the tropical Andes as revealed by ice-core data. Less prominent advances occurred between AD 1780 and 1880.

  17. [Aquatic insects and water quality in Peñas Blancas watershed and reservoir].

    Science.gov (United States)

    Mora, Meyer Guevara

    2011-06-01

    The aquatic insects have been used to evaluate water quality of aquatic environments. The population of aquatic insects and the water quality of the area were characterized according to the natural and human alterations present in the study site. During the monthly-survey, pH, DO, temperature, water level, DBO, PO4 and NO3 were measured. Biological indexes (abundance, species richness and the BMWP-CR) were used to evaluate the water quality. No relation between environmental and aquatic insects was detected. Temporal and spatial differences attributed to the flow events (temporal) and the presence of Peñas Blancas reservoir (spatial). In the future, the investigations in Peñas Blancas watershed need to be focused on determining the real influence of the flows, sediment release and the possible water quality degradation because of agriculture activities.

  18. Shaded relief of Bahia State, Brazil

    Science.gov (United States)

    2000-01-01

    This topographic image is the first to show the full 240-kilometer-wide (150 mile)swath collected by the Shuttle Radar Topography Mission (SRTM). The area shown is in the state of Bahia in Brazil. The semi-circular mountains along the left side of the image are the Serra Da Jacobin, which rise to 1100 meters (3600 feet) above sea level. The total relief shown is approximately 800 meters (2600 feet). The top part of the image is the Sertao, a semi-arid region, that is subject to severe droughts during El Nino events. A small portion of the San Francisco River, the longest river (1609 kilometers or 1000 miles) entirely within Brazil, cuts across the upper right corner of the image. This river is a major source of water for irrigation and hydroelectric power. Mapping such regions will allow scientists to better understand the relationships between flooding cycles, drought and human influences on ecosystems.This shaded relief image was generated using topographic data from the Shuttle Radar Topography Mission. A computer-generated artificial light source illuminates the elevation data to produce a pattern of light and shadows. Slopes facing the light appear bright, while those facing away are shaded. On flatter surfaces, the pattern of light and shadows can reveal subtle features in the terrain. Colors show the elevation as measured by SRTM. Colors range from green at the lowest elevations to reddish at the highest elevations. Shaded relief maps are commonly used in applications such as geologic mapping and land use planning.The Shuttle Radar Topography Mission (SRTM), launched on February 11, 2000, uses the same radar instrument that comprised the Spaceborne Imaging Radar-C/X-Band Synthetic Aperture Radar (SIR-C/X-SAR) that flew twice on the Space Shuttle Endeavour in 1994. The mission is designed to collect three-dimensional measurements of the Earth's surface. To collect the 3-D data, engineers added a 60-meter-long (200-foot) mast, an additional C-band imaging

  19. FLORA OF MOLOCHNYI ESTUARY COASTS

    Directory of Open Access Journals (Sweden)

    Kolomiychuk V.P.

    2013-09-01

    Full Text Available Present-day characteristic of the coastal flora of Molochnyi eastury is given, that is one of the largest estuaries in Ukraine, the shores and waters of which in 2009 became a part of the Pryazov’ya National Nature Park. The analysis of the main parameters of the flora is made. Rare component of the estuary coastal flora is characterized, further steps to conserve the nature of Pryazov’ya are proposed.

  20. Wind Transport of Radionuclide- Bearing Dust, Peña Blanca, Chihuahua, Mexico

    Science.gov (United States)

    Velarde, R.; Goodell, P. C.; Gill, T. E.; Arimoto, R.

    2007-05-01

    This investigation evaluates radionuclide fractionation during wind erosion of high-grade uranium ore storage piles at Peña Blanca (50km north of Chihuahua City), Chihuahua, Mexico. The aridity of the local environment promotes dust resuspension by high winds. Although active operations ceased in 1983, the Peña Blanca mining district is one of Mexico`s most important uranium ore reserves. The study site contains piles of high grade ore, left loose on the surface, and separated by the specific deposits from which they were derived (Margaritas, Nopal I, and Puerto I). Similar locations do not exist in the United States, since uranium mining sites in the USA have been reclaimed. The Peña Blanca site serves as an analog for the Yucca Mountain project. Dust deposition is collected at Peña Blanca with BSNE sediment catchers (Fryrear, 1986) and marble dust traps (Reheis, 1999). These devices capture windblown sediment; subsequently, the sample data will help quantify potentially radioactive short term field sediment loss from the repository surface and determine sediment flux. Aerosols and surface materials will be analyzed and radioactivity levels established utilizing techniques such as gamma spectroscopy. As a result, we will be able to estimate how much radionuclide contaminated dust is being transported or attached geochemically to fine grain soils or minerals (e.g., clays or iron oxides). The high-grade uranium-bearing material is at secular equilibrium, thus the entire decay series is present. Of resulting interest is not only the aeolian transport of uranium, but also of the other daughter products. These studies will improve our understanding of geochemical cycling of radionuclides with respect to sources, transport, and deposition. The results may also have important implications for the geosciences and homeland security, and potential applications to public health. Funding for this project is provided in part via a NSF grant to Arimoto.

  1. REGIONAL HYDROLOGY OF THE NOPAL I SITE, SIERRA DE PENA BLANCA, CHIHUAHUA, MEXICO

    Energy Technology Data Exchange (ETDEWEB)

    J.A. Rodriguez-Pineda; P. Goodell; P.F. Dobson; J. Walton; R. Oliver; De La Garza; S. Harder

    2005-07-11

    The U.S. Department of Energy sponsored the drilling of three wells in 2003 near the Nopal I uranium deposit at the Sierra Pena Blanca, Chihuahua, Mexico. Piezometric information is being collected to understand groundwater flow at local and regional levels as part of an ongoing natural analogue study of radionuclide migration. Water level monitoring reported at these and other wells in the region is combined with archival data to provide a better understanding of the hydrology at Nopal I. Initial results suggest that the local hydrology is dependent on the regional hydrologic setting and that this groundwater system behaves as an unconfined aquifer. The region is dominated by an alternating sequence of highlands and basins that step down from west to east. The Sierra de Pena Blanca was downdropped from the cratonic block to the west during Cenozoic extension. The Nopal I area is near the intersection of two large listric faults, and the questa of ash flow tuffs that hosts the deposit has been subjected to complex structural events. The Pena Blanca Uranium District was originally characterized by 105 airborne radiometric anomalies, indicating widespread uranium mineralization. The Nopal I uranium deposit is located in the Sierra del Pena Blanca between the Encinillas Basin to the west, with a mean elevation of 1560 m, and the El Cuervo Basin to the east, with a mean elevation of 1230 m. The Nopal I + 10 level is at an intermediate elevation of 1463 m, with a corresponding groundwater elevation of approximately 1240 m. The regional potentiometric surface indicates flow from west to east, with the El Cuervo Basin being the discharge zone for the regional flow system. However, it appears that the local groundwater potential beneath the Nopal I site is more in accordance with the water table of the El Cuervo Basin than with that of the Encinillas Basin. This might indicate that there is limited groundwater flow between the Encinillas Basin and the Nopal I area.

  2. REGIONAL HYDROLOGY OF THE NOPAL I SITE, SIERRA DE PENA BLANCA, CHIHUAHUA, MEXICO

    International Nuclear Information System (INIS)

    Rodriguez-Pineda, J.A.; Goodell, P.; Dobson, P.F.; Walton, J.; Oliver, R.; De La Garza; Harder, S.

    2005-01-01

    The U.S. Department of Energy sponsored the drilling of three wells in 2003 near the Nopal I uranium deposit at the Sierra Pena Blanca, Chihuahua, Mexico. Piezometric information is being collected to understand groundwater flow at local and regional levels as part of an ongoing natural analogue study of radionuclide migration. Water level monitoring reported at these and other wells in the region is combined with archival data to provide a better understanding of the hydrology at Nopal I. Initial results suggest that the local hydrology is dependent on the regional hydrologic setting and that this groundwater system behaves as an unconfined aquifer. The region is dominated by an alternating sequence of highlands and basins that step down from west to east. The Sierra de Pena Blanca was downdropped from the cratonic block to the west during Cenozoic extension. The Nopal I area is near the intersection of two large listric faults, and the questa of ash flow tuffs that hosts the deposit has been subjected to complex structural events. The Pena Blanca Uranium District was originally characterized by 105 airborne radiometric anomalies, indicating widespread uranium mineralization. The Nopal I uranium deposit is located in the Sierra del Pena Blanca between the Encinillas Basin to the west, with a mean elevation of 1560 m, and the El Cuervo Basin to the east, with a mean elevation of 1230 m. The Nopal I + 10 level is at an intermediate elevation of 1463 m, with a corresponding groundwater elevation of approximately 1240 m. The regional potentiometric surface indicates flow from west to east, with the El Cuervo Basin being the discharge zone for the regional flow system. However, it appears that the local groundwater potential beneath the Nopal I site is more in accordance with the water table of the El Cuervo Basin than with that of the Encinillas Basin. This might indicate that there is limited groundwater flow between the Encinillas Basin and the Nopal I area

  3. Final report of the Peña Blanca natural analogue project

    Energy Technology Data Exchange (ETDEWEB)

    Levy, Schön S. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Goldstein, Steven Joel [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Abdel-Fattah, Amr I. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Amato, Ronald S. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Anthony, Elizabeth [Univ. of Texas, El Paso, TX (United States); Cook, Paul [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Dobson, Patrick F. [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fayek, Mostafa [Univ. of Manitoba, Winnipeg (Canada); French, Diana [Univ. of Texas, El Paso, TX (United States); Garza, Rodrigo de [Univ. Autonoma de Chihuahua (Mexico); Ghezzehei, Teamrat [Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Goodell, Philip C. [Univ. of Texas, El Paso, TX (United States); Harder, Steven H. [Univ. of Texas, El Paso, TX (United States); Ku, Teh-Lung [Univ. of Southern California, Los Angeles, CA (United States); Luo, Shangde [Univ. of Southern California, Los Angeles, CA (United States); Murrell, Michael Tildon [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Norman, Deborah E. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Nunn, Andrew J. [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Oliver, Ronald [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Pekar-Carpenter, Katrina [Univ. of Texas, El Paso, TX (United States); Rearick, Michael Sean [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ren, Minghua [Univ. of Texas, El Paso, TX (United States); Reyes-Cortes, Ignacio [Univ. Autonoma de Chihuahua (Mexico); Pineda, Jose Alfredo [El Instituto de Ecologia (INECOL) (Mexico); Saulnier, George [AREVA Federal Services LLC, Charlotte, NC (United States); Tarimala, Sowmitri [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Walton, John [Univ. of Texas, El Paso, TX (United States)

    2016-10-04

    The Peña Blanca region, 50 km north of Chihuahua City, Chihuahua, México, was a target of uranium exploration and mining by the Mexican government. After mining ceased in 1981, researchers became interested in this region as a study area for subsurface uranium migration with relevance to geologic disposal of nuclear waste. Many studies related to this concept were conducted at the Nopal I mine site located on a cuesta (hill) of the Sierra Peña Blanca. This site has geologic, tectonic, hydrologic, and geochemical similarities to Yucca Mountain, Nevada, a formerly proposed site for a high-level nuclear-waste repository in the unsaturated zone. The U.S. Department of Energy (U.S. DOE), Office of Civilian Radioactive Waste Management (OCRWM), sponsored studies at Nopal I in the 1990s and supported the drilling of three research wells – PB1, PB2, and PB3 – at the site in 2003. Beginning in 2004, the Peña Blanca Natural Analogue Project was undertaken by U.S. DOE, OCRWM to develop a three-dimensional conceptual model of the transport of uranium and its radiogenic daughter products at the Nopal I site.

  4. Estuary-wide genetic stock distribution and salmon habitat use, tidal-fluvial estuary - Columbia River Estuary Tidal Habitats

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The goal of the tidal-fluvial estuary study is to determine the estuary's contribution to the spatial structure and life history diversity of Columbia River salmon...

  5. 75 FR 34975 - Notice of Estuary Habitat Restoration Council's Intent to Revise its Estuary Habitat Restoration...

    Science.gov (United States)

    2010-06-21

    ... Estuary Habitat Restoration Council's Intent to Revise its Estuary Habitat Restoration Strategy; Request... interagency Estuary Habitat Restoration Council, is providing notice of the Council's intent to revise the ''Estuary Habitat Restoration Strategy'' and requesting public comments to guide its revision. DATES...

  6. Role of erosion and isostasy in the Cordillera Blanca uplift: insights from Low-T thermochronology and landscape evolution modeling (northern Peru, Andes)

    Science.gov (United States)

    Margirier, A.; Robert, X.; Braun, J.; Laurence, A.

    2017-12-01

    The uplift and exhumation of the highest Peruvian peaks seems closely linked to the Cordillera Blanca normal fault that delimits and shape the western flank of the Cordillera Blanca. Two models have been previously proposed to explain the occurrence of extension and the presence of this active normal fault in a compression setting but the Cordillera Blanca normal fault and the uplift and exhumation of the Cordillera Blanca remain enigmatic. Recent studies suggested an increase of exhumation rates during the Quaternary in the Cordillera Blanca and related this increase to a change in climate and erosion process (glacial erosion vs. fluvial erosion). The Cordillera Blanca granite has been significantly eroded since its emplacement (12-5 Ma) indicating a significant mass of rocks removal. Whereas it has been demonstrated recently that the effect of eroding denser rocks can contribute to an increase of uplift rate, the impact of erosion and isostasy on the increase of the Cordillera Blanca uplift rates has never been explored. Based on numerical modeling of landscape evolution we address the role of erosion and isostasy in the uplift and exhumation of the Cordillera Blanca. We performed inversions of the present-day topography, total exhumation and thermochronological data using a landscape evolution model (FastScape). Our results evidence the contribution of erosion and associated flexural rebound to the uplift of the Cordillera Blanca. Our models suggest that the erosion of the Cordillera Blanca dense intrusion since 3 Ma could also explain the Quaternary exhumation rate increase in this area. Finally, our results allow to question the previous models proposed for the formation of the Cordillera Blanca normal fault.

  7. Frequent Questions about Estuary Data Mapper (EDM)

    Science.gov (United States)

    Estuary Data Mapper is a tool for geospatial data discovery, visualization, and data download for any of the approximately 2,000 estuaries and associated watersheds in along the five US coastal regions

  8. Downloading and Installing Estuary Data Mapper (EDM)

    Science.gov (United States)

    Estuary Data Mapper is a tool for geospatial data discovery, visualization, and data download for any of the approximately 2,000 estuaries and associated watersheds in along the five US coastal regions

  9. Influence of estuaries on shelf foraminiferal species

    Digital Repository Service at National Institute of Oceanography (India)

    Nigam, R.

    Dabhol-bhatkal stretch of the west coast of India is marked by a number of estuaries. Cavarotalia annectens is selected to monitor the influence of these estuaries on the inner shelf foraminiferal fauna. The percentage distribution of this species...

  10. SANCOR estuaries programme 1982-1986

    CSIR Research Space (South Africa)

    SANCOR

    1983-02-01

    Full Text Available , such research will also aid in the rational management of estuaries. Estuaries on which research should be concentrated are identified and guidelines are given for project proposals and reporting....

  11. Nutrients in some estuaries of Kerala

    Digital Repository Service at National Institute of Oceanography (India)

    Devi, K.S.; Venugopal, P.; Remani, K.N.; Zacharias, D.; Unnithan, R.V.

    phosphate and ammonia were high at Kallai compared to other three estuaries. All the estuaries showed an increase in nitrate content during monsoon. Nitrite values were high in postmonsoon. Ammonia levels were generally high except at Korapuzha. Nutrient...

  12. Leven estuary project. Fisheries Department final report

    OpenAIRE

    Bayliss, B.D.

    1997-01-01

    This is the report on the Leven estuary project: Fisheries Department final report produced by the Environment Agency North West in 1997. This report contains information about Leven estuary, river Leven catchment, river Crake catchment and the Ulverston Discharges. The Leven estuary is characterised by being very shallow, and shares the extremely variable tides and currents that characterize the whole of Morecambe Bay. There was little detailed knowledge of the impact on the Leven estuary, a...

  13. Energy balance from Bahia state 2011 - series: 1994-2010

    International Nuclear Information System (INIS)

    2011-01-01

    The present Energy Balance is constituted of six chapters, as follows: the chapter 1 approaches the profile of the energy system, showing the structure of the Bahia state energy matrix i n the year of 2010, and the modifications occurred during the period of 1994-2010; the chapter 2 analyses the evolution during the period of 1994-2010 of the energy offer with aspects of production, exports, imports and consumption; the chapter 3 comprised the evolution of energy consumption by sources and social-economic sectors; chapter 4 focus the evolution of state energy self-sufficiency, confronting the primary energy production with the energy total demand; the chapter 5 contains the balance of the energy transformation centers of the Bahia state; and the chapter 6 contains the consolidated matrixes expressed in the period of 1980, 1985 and 1990-2010

  14. New species of Cyclodontina from Bahia, Brazil (Gastropoda, Pulmonata, Odontostomidae

    Directory of Open Access Journals (Sweden)

    Rodrigo B. Salvador

    2014-12-01

    Full Text Available A new species of pulmonate snail was recently collected in a small forest fragment in the city of Bom Jesus da Lapa, Bahia state, Brazil. Bahia is known for a high diversity of land snails and Bom Jesus da Lapa is an interesting locality, since it is close to the interface between two major Brazilian biomes: Cerrado and Caatinga. The new species is described as Cyclodontina tapuia sp. nov. and can be easily identified by its brown shell, conical spire, convex whorls, a sculpture comprised of strong ribs, and an aperture with four barriers: a median parietal tooth, a median palatal tooth, a median basal tooth and a strong columellar lamella. This discovery is also a reminder of how little the Brazilian continental molluscan fauna is known and of the urgency in studying and preserving the rich (though usually overlooked fauna of the Caatinga.

  15. Indian estuaries: Dynamics, ecosystems, and threats

    Digital Repository Service at National Institute of Oceanography (India)

    Shetye, S.R.

    the tide pulls the mixed water out of the estuary through its mouth. Different processes within an estuary contribute to mixing of the two waters, the important among these in the Mandovi estuary are: influence of the tide on the advective field within...

  16. Squamate reptiles of the Atlantic Forest of northern Bahia, Brazil

    OpenAIRE

    de Freitas, Marco

    2014-01-01

    We present a list of squamate reptiles of the northern Atlantic forest of Bahia, Brazil, comprising a total of 29 municipalities. The study area was sampled opportunistically over more than 20 years resulting in a total of 482 specimens deposited in various herpetological collections. Of these, 314 were snakes belonging to 62 species and seven families, 42 were amphisbaenas belonging to five species in a single family and 125 specimens were lizards, grouped in 36 species and 12 families.

  17. Cheralite quartzides in Itiuba mountains-Bahia, Brazil

    International Nuclear Information System (INIS)

    Gorsky, E.; Gorsky, V.A.

    1974-01-01

    Quartzitic pebbles of anomalous radioactivity were found by the geologists of the 'Comissao Nacional de Energia Nuclear' of Brazil (CNEN) in November 1964 in the Vicinity of Santa Rosa, municipality of Jaguarari, Bahia. A radioactive anomaly of large extension was subsequently localized by scintilometric prospecting in February 1965 over precambrian quartzites on Morro do Barbosa (near Santa Rosa). Samples of the radioactive rocks were investigated by the Mineralogical-Petrographical Section of the CNEN. The results of the investigation are reported

  18. Migrações internas e malária urbana - Bahia, Brasil Internal migration and urban malaria - Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Sebastião Loureiro de Souza

    1986-10-01

    Full Text Available Estuda-se as características sócio-econômicas dos indivíduos acometidos pela malária, em 1983, na área urbana de Camaçari - Bahia, Brasil, com destaque para os subgrupos migrantes e não migrantes. As condições de vida precárias de ambos os subgrupos são apontadas como os determinantes do surto de malária desencadeado no local.It is proposed to study the socio-economic characteristics of individuals who were infected with malaria in the urban area of Camaçari, Bahia, Brazil, in 1983. Special emphasis being given to the subgroups of migrants and nonmigrants. The precarious living conditions of both subgroups are identified as determinative of the malaria outbreak which occurred there.

  19. The Downstream Fate of Glacial Runoff and Groundwater in the Cordillera Blanca, Peru

    Science.gov (United States)

    McKenzie, J. M.; Gordon, R.; Chavez, D.; Maharaj, L.; Baraer, M.; Mark, B. G.; Lautz, L. K.

    2013-12-01

    Rapid glacier recession in the Cordillera Blanca, Peru, is raising concerns about current and future water resources for the inhabitants of the Rio Santa watershed. Glacier meltwater buffers stream discharge throughout the range, reducing the variability of annual runoff and maintaining stream flows during the dry season. Groundwater is also an important component of dry season runoff as it can contribute as much as 50-70% to outflow in some Rio Santa tributaries. A better understanding of groundwater dynamics in high elevation watersheds is needed, including quantification of recharge, subsurface processes, and available storage. We present the results from recent groundwater studies in the Cordillera Blanca where numerous investigative techniques have been used, including ground penetrating radar, hydraulic conductivity measurements, tracer tests, and hydrochemical mixing models. Our research focuses primarily on the low-relief pampa valley floors across which glacial-melt derived rivers flow. Across the Cordillera, these valley systems cover approximately 65 km2 and are comprised of unconsolidated glacial, talus, and lacustrine deposits and wetlands. The valleys commonly have buried, permeable, talus aquifers that are overlain by relatively impermeable, glaciolacustrine deposits. Glaciofluvial outwash deposits also act as aquifers (hydraulic conductivity of 10-4 m/s). The travel time of water stored in these systems is generally less than 3-4 years and the maximum observed dry season groundwater velocity is 60 cm/day. While groundwater represents an important component of dry season water resources source of water in the Cordillera Blanca, it is also potentially vulnerable to climate change including changes in the precipitation regime and decrease in glacially derived recharge.

  20. Seasonal changes in reproductive activity, sperm variables and sperm freezability in Blanca Andaluza bucks

    Directory of Open Access Journals (Sweden)

    Lourdes Gallego-Calvo

    2015-12-01

    Full Text Available Interest in the preservation of endangered breeds such as the Blanca Andaluza goat, has increased and some steps should be therefore taken to ensure it. The study was designed to determine the seasonal reproductive pattern of Blanca Andaluza bucks, and whether this affects the quality of their semen and its freezability over the year. Seven bucks were used and their body weight, testicular weight, plasma testosterone concentration and fresh sperm quality determined every week. The collected sperm was cryopreserved and stored; it was then thawed and the same sperm quality variables measured every fortnight. High plasma testosterone concentrations were recorded during the summer and autumn, and low concentrations were recorded during winter and spring (p<0.001. No differences were seen between seasons in terms of the percentage of bucks ejaculating, the percentage of active bucks, or ejaculate volume. However, the sperm concentration, the total number of sperm per ejaculate, and the values for most fresh sperm variables were lower during the winter period (at least p<0.05. After freezing-thawing, the quality of winter-collected sperm was better, in some respects, than that of summer-collected sperm (at least p<0.05. These results reveal that Blanca Andaluza bucks show seasonal reproductive activity in terms of their plasma testosterone concentration, but no clear change in their sexual behaviour between seasons was observed. The values of fresh sperm variables also vary over the year, reaching their lowest during winter. However, after freezing-thawing, winter-collected sperm is of overall better quality than sperm collected during the summer.

  1. Empirical downscaling of atmospheric key variables above a tropical glacier surface (Cordillera Blanca, Peru)

    Science.gov (United States)

    Hofer, M.; Kaser, G.; Mölg, T.; Juen, I.; Wagnon, P.

    2009-04-01

    Glaciers in the outer tropical Cordillera Blanca (Peru, South America) are of major socio-economic importance, since glacier runoff represents the primary water source during the dry season, when little or no rainfall occurs. Due to their location at high elevations, the glaciers moreover provide important information about climate change in the tropical troposphere, where measurements are sparse. This study targets the local reconstruction of air temperature, specific humidity and wind speed above the surface of an outer tropical glacier from NCEP/NCAR reanalysis data as large scale predictors. Since a farther scope is to provide input data for process based glacier mass balance modelling, the reconstruction pursues a high temporal resolution. Hence an empirical downscaling scheme is developed, based on a few years' time series of hourly observations from automatic weather stations, located at the glacier Artesonraju and nearby moraines (Northern Cordillera Blanca). Principal component and multiple regression analyses are applied to define the appropriate spatial downscaling domain, suitable predictor variables, and the statistical transfer functions. The model performance is verified using an independent data set. The best predictors are lower tropospheric air temperature and specific humidity, at reanalysis model grid points that represent the Bolivian Altiplano, located in the South of the Cordillera Blanca. The developed downscaling model explaines a considerable portion (more than 60%) of the diurnal variance of air temperature and specific humidity at the moraine stations, and air temperature above the glacier surface. Specific humidity above the glacier surface, however, can be reconstructed well in the seasonal, but not in the required diurnal time resolution. Wind speed can only be poorly determined by the large scale predictors (r² lower than 0.3) at both sites. We assume a complex local interaction between valley and glacier wind system to be the main

  2. Integrating Multiple Geophysical Methods to Quantify Alpine Groundwater- Surface Water Interactions: Cordillera Blanca, Peru

    Science.gov (United States)

    Glas, R. L.; Lautz, L.; McKenzie, J. M.; Baker, E. A.; Somers, L. D.; Aubry-Wake, C.; Wigmore, O.; Mark, B. G.; Moucha, R.

    2016-12-01

    Groundwater- surface water interactions in alpine catchments are often poorly understood as groundwater and hydrologic data are difficult to acquire in these remote areas. The Cordillera Blanca of Peru is a region where dry-season water supply is increasingly stressed due to the accelerated melting of glaciers throughout the range, affecting millions of people country-wide. The alpine valleys of the Cordillera Blanca have shown potential for significant groundwater storage and discharge to valley streams, which could buffer the dry-season variability of streamflow throughout the watershed as glaciers continue to recede. Known as pampas, the clay-rich, low-relief valley bottoms are interfingered with talus deposits, providing a likely pathway for groundwater recharged at the valley edges to be stored and slowly released to the stream throughout the year by springs. Multiple geophysical methods were used to determine areas of groundwater recharge and discharge as well as aquifer geometry of the pampa system. Seismic refraction tomography, vertical electrical sounding (VES), electrical resistivity tomography (ERT), and horizontal-to-vertical spectral ratio (HVSR) seismic methods were used to determine the physical properties of the unconsolidated valley sediments, the depth to saturation, and the depth to bedrock for a representative section of the Quilcayhuanca Valley in the Cordillera Blanca. Depth to saturation and lithological boundaries were constrained by comparing geophysical results to continuous records of water levels and sediment core logs from a network of seven piezometers installed to depths of up to 6 m. Preliminary results show an average depth to bedrock for the study area of 25 m, which varies spatially along with water table depths across the valley. The conceptual model of groundwater flow and storage derived from these geophysical data will be used to inform future groundwater flow models of the area, allowing for the prediction of groundwater

  3. Seasonal changes in reproductive activity, sperm variables and sperm freezability in Blanca Andaluza bucks

    Energy Technology Data Exchange (ETDEWEB)

    Gallego-Calvo, L.; Gatica, M.C.; Santiago-Moreno, J.; Guzmán, J.L.; Zarazaga, L.

    2015-07-01

    Interest in the preservation of endangered breeds such as the Blanca Andaluza goat, has increased and some steps should be therefore taken to ensure it. The study was designed to determine the seasonal reproductive pattern of Blanca Andaluza bucks, and whether this affects the quality of their semen and its freezability over the year. Seven bucks were used and their body weight, testicular weight, plasma testosterone concentration and fresh sperm quality determined every week. The collected sperm was cryopreserved and stored; it was then thawed and the same sperm quality variables measured every fortnight. High plasma testosterone concentrations were recorded during the summer and autumn, and low concentrations were recorded during winter and spring (p<0.001). No differences were seen between seasons in terms of the percentage of bucks ejaculating, the percentage of active bucks, or ejaculate volume. However, the sperm concentration, the total number of sperm per ejaculate, and the values for most fresh sperm variables were lower during the winter period (at least p<0.05). After freezing-thawing, the quality of winter-collected sperm was better, in some respects, than that of summer-collected sperm (at least p<0.05). These results reveal that Blanca Andaluza bucks show seasonal reproductive activity in terms of their plasma testosterone concentration, but no clear change in their sexual behaviour between seasons was observed. The values of fresh sperm variables also vary over the year, reaching their lowest during winter. However, after freezing-thawing, winter-collected sperm is of overall better quality than sperm collected during the summer. (Author)

  4. 33 CFR 110.74c - Bahia de San Juan, PR.

    Science.gov (United States)

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Bahia de San Juan, PR. 110.74c Section 110.74c Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY ANCHORAGES ANCHORAGE REGULATIONS Special Anchorage Areas § 110.74c Bahia de San Juan, PR. The waters of San Antonio...

  5. NSR&D FY17 Report: CartaBlanca Capability Enhancements

    Energy Technology Data Exchange (ETDEWEB)

    Long, Christopher Curtis [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Dhakal, Tilak Raj [Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Zhang, Duan Zhong [Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

    2017-10-19

    Over the last several years, particle technology in the CartaBlanca code has been matured and has been successfully applied to a wide variety of physical problems. It has been shown that the particle methods, especially Los Alamos's dual domain material point method, is capable of computing many problems involves complex physics, chemistries accompanied by large material deformations, where the traditional finite element or Eulerian method encounter significant difficulties. In FY17, the CartaBlanca code has been enhanced with physical models and numerical algorithms. We started out to compute penetration and HE safety problems. Most of the year we focused on the TEPLA model improvement testing against the sweeping wave experiment by Gray et al., because it was found that pore growth and material failure are essentially important for our tasks and needed to be understood for modeling the penetration and the can experiments efficiently. We extended the TEPLA mode from the point view of ensemble phase average to include the effects of nite deformation. It is shown that the assumed pore growth model in TEPLA is actually an exact result from the theory. Alone this line, we then generalized the model to include finite deformations to consider nonlinear dynamics of large deformation. The interaction between the HE product gas and the solid metal is based on the multi-velocity formation. Our preliminary numerical results suggest good agreement between the experiment and the numerical results, pending further verification. To improve the parallel processing capabilities of the CartaBlanca code, we are actively working with the Next Generation Code (NGC) project to rewrite selected packages using C++. This work is expected to continue in the following years. This effort also makes the particle technology developed with CartaBlanca project available to other part of the laboratory. Working with the NGC project and rewriting some parts of the code also given us an

  6. Biogeochemical budgets for Tapi Estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Bapardekar, M.V.; DeSousa, S.N.; Zingde, M.D.

    sup(-1) comes from the wastes. Chemical fertilizers are used in the basin at the rate of 113 kg.ha sup(-1). During the dry season the salinity in the estuary decreases progressively in the upstream direction form an average 32.53 psu at the mouth to 0...

  7. Food Webs in an Estuary.

    Science.gov (United States)

    Dunne, Barbara B.

    The Maryland Marine Science Education Project has produced a series of mini-units in marine science education for the junior high/middle school classroom. This unit focuses on food chains in an estuary. Although the unit specifically treats the Chesapeake Bay, it may be adapted for use with similar estuarine systems. In addition, the unit may be…

  8. Simulated Sampling of Estuary Plankton

    Science.gov (United States)

    Fortner, Rosanne W.; Jenkins, Deborah Bainer

    2009-01-01

    To find out about the microscopic life in the valuable estuary environment, it is usually necessary to be near the water. This dry lab offers an alternative, using authentic data and a simulation of plankton sampling. From the types of organisms found in the sample, middle school students can infer relationships in the biological and physical…

  9. Seasonal prevalence of white plague like disease on the endemic Brazilian reef coral Mussismilia braziliensis Prevalencia estacional de la enfermedad de la plaga blanca en el coral endémico de Brasil Mussismilia braziliensis

    Directory of Open Access Journals (Sweden)

    Ronaldo Francini-Filho

    2010-01-01

    Full Text Available The reef coral Mussismilia braziliensis Verril, 1968 is endemic to the eastern Brazilian coast, representing a major reef-building species in the region. This coral is threatened by extinction due to the recent proliferation of a white-plague like (WPL disease. Despite its severe impacts, the environmental factors leading to outbreaks of WPL disease are still poorly understood. This study describes the seasonal prevalence of WPL disease on M. braziliensis in the Abrolhos Bank, on the southern coast of Bahia Brazil. In situ estimates showed that WPL disease was about 4.5 times more prevalent in summer (January 2007, mean sea surface temperature 27.4°C than in winter (July 2007, 25.0°C. This result suggests that the prevalence of WPL disease in M. braziliensis is temperature-dependent, supporting the hypothesis that warmer oceans are facilitating the proliferation of coral diseases worldwide.El coral Mussismilia braziliensis Verril, 1968 es endémico de la costa este de Brasil y representa una de las principales especies constructoras de arrecifes coralinos en dicha region. Este coral se encuentra bajo la amenaza de extincion debido la reciente propagacion de la enfermedad llamada la plaga blanca (PB. Pese los fuertes impactos, los factores ambientales responsables por epidemias de la PB aún son poco conocidos. En este estudio se describe la prevalencia estacional de la PB en M. braziliensis en el Banco de Abrolhos, ubicado en la costa sur de Bahia, Brasil. Estimaciones in situ comprueban que la prevalencia de esta molestia ha sido cerca de 4,5 veces mayor en verano (enero de 2007, temperatura media del agua superficial del mar 27,4°C, que en invierno (julio de 2007; 25,0°C. Este resultado sugiere que la prevalencia de la enfermedad PB en M. braziliensis es dependiente de la temperatura, reforzando la hipótesis de que los océanos mas cálidos estén facilitando la propagacion de enfermedades coralígenas en todo el mundo.

  10. Major QTLs Control Resistance to Rice Hoja Blanca Virus and Its Vector Tagosodes orizicolus

    Science.gov (United States)

    Romero, Luz E.; Lozano, Ivan; Garavito, Andrea; Carabali, Silvio J.; Triana, Monica; Villareal, Natalia; Reyes, Luis; Duque, Myriam C.; Martinez, César P.; Calvert, Lee; Lorieux, Mathias

    2013-01-01

    Rice hoja blanca (white leaf) disease can cause severe yield losses in rice in the Americas. The disease is caused by the rice hoja blanca virus (RHBV), which is transmitted by the planthopper vector Tagosodes orizicolus. Because classical breeding schemes for this disease rely on expensive, time-consuming screenings, there is a need for alternatives such as marker-aided selection. The varieties Fedearroz 2000 and Fedearroz 50, which are resistant to RHBV and to the feeding damage caused by T. orizicolus, were crossed with the susceptible line WC366 to produce segregating F2:3 populations. The F3 families were scored for their resistance level to RHBV and T. orizicolus. The F2:3 lines of both crosses were genotyped using microsatellite markers. One major QTL on the short arm of chromosome 4 was identified for resistance to RHBV in the two populations. Two major QTL on chromosomes 5 and 7 were identified for resistance to T. orizicolus in the Fd2000 × WC366 and Fd50 × WC366 crosses, respectively. This comparative study using two distinct rice populations allowed for a better understanding of how the resistance to RHBV and its vector are controlled genetically. Simple marker-aided breeding schemes based on QTL information can be designed to improve rice germplasm to reduce losses caused by this important disease. PMID:24240781

  11. Margaritasite: a new mineral of hydrothermal origin from the Pena Blanca uranium district, Mexico.

    Science.gov (United States)

    Wenrich, K.J.; Modreski, P.J.; Zielinski, R.A.; Seeley, J.L.

    1982-01-01

    Margaritasite, (Cs,K,H3O)2(UO2)2V2O8.nH2O (where Cs > K, H3O and n approx 1), a 10.514, b 8.425, c 7.25 A, beta 106.01o, P21/a, Z = 2, is a newly recognized uranium ore mineral named for the Margaritas deposit, Pena Blanca uranium district, Chihuahua, Mexico, at which it was discovered. A Cs-rich analogue of carnotite, margaritasite is the natural equivalent of synthetic Cs-uranyl vanadate (A.M. 43- 799, 50-825). A fine-grained yellow mineral, it is most easily distinguished from carnotite by XRD; X-ray powder patterns (CuKalpha radiation) show that the (001) reflection of margaritasite lies at 12.7o (2theta ), while that of carnotite is found at 13.8o (2theta ). The shift of the (001) reflection in margaritasite reflects the structural changes caused when Cs occupies the sites filled by K in carnotite. Synthesis experiments indicate that margaritasite also differs from carnotite in a higher-T hydrothermal origin. Chemical analyses and XRD data for margaritasite and synthetic Cs- carnotite, and chemical analyses for rocks from Sierra Pena Blanca and vicinity, are tabulated.-J.A.Z.

  12. Geomorphologically effective floods from moraine-dammed lakes in the Cordillera Blanca, Peru

    Science.gov (United States)

    Emmer, Adam

    2017-12-01

    Outburst floods originating in moraine-dammed lakes represent a significant geomorphological process as well as a specific type of threat for local communities in the Cordillera Blanca, Peru (8.5°-10° S; 77°-78° W). An exceptional concentration of catastrophic floods has been reported from the Cordillera Blanca in the first half of 20th Century (1930s-1950s), leading to thousands of fatalities. The main objective of this paper is to provide a revised and comprehensive overview of geomorphologically effective floods in the area of interest, using various documentary data sources, verified by analysis of remotely sensed images (1948-2013) and enhanced by original field data. Verified events (n = 28; 4 not mentioned before) are analysed from the perspective of spatiotemporal distribution, pre-flood conditions, causes, mechanisms and geomorphological impacts as well as socioeconomical consequences, revealing certain patterns and similar features. GLOFs are further classified according to their magnitude: 5 extreme events, 8 major events and 15 minor events are distinguished, referring to the quantified geomorphological and socioeconomical impacts. Selected moraine dams and flood deposits are dated using lichenometric dating. Special attention is given to moraine dam breaches - the most frequent type of water release with the most significant consequences. Selected major events and their consequences are studied in detail in a separate section. Finally, a general schematic model of lake formation, growth and post-flood evolution reflecting initial topographical setting and glacier retreat is introduced and the utilization of the obtained results is outlined.

  13. High and low frequency erosive and constructive cycles in estuarine beaches: an example from Garcez Point, Bahia/Brazil

    Directory of Open Access Journals (Sweden)

    ABÍLIO C.S.P. BITTENCOURT

    2001-12-01

    Full Text Available Monitoring of the morphodynamic variations of the beaches associated with an estuary contiguous with Garcez Point, Bahia, Brazil, and the superposition of aerial photographs from the region, show the presence of distinctive erosive and constructive cycles of low and high frequencies. Between 1959 and 1989, one event of shoreline erosion and progradation was recognized on the oceanic beaches just outside the estuary. Inside the estuary, an erosion phase at the southern margin coincides with a constructive phase at the other side, and vice-versa. On the southern estuarine beach, low-frequency cycles of erosion and progradation are also perceived, but with the inverse trend when compared to the contiguous oceanic beach. During the beach monitoring period (February/1991 to July/1992, the oceanic beach showed retreat rates varying from 23.7m/year, at the channel entrance, to 1.0m/year, three kilometers away from it. During the same period, the estuarine beach advanced at a rate of 60.3m/year. The long-term dynamics of the shoreline position in both sides of the estuarine entrance appears to be related to the position of the channel in the ebb-tidal delta.O monitoramento das variações morfodinâmicas das praias associadas com um estuário contíguo à Ponta dos Garvez, Bahia, Brasil, e a superposição de fotos aéreas da região, mostram a presença de distintos ciclos erosivos e construtivos, de baixa e alta freqüências. Entre 1959 e 1989, um evento de erosão e progradação da linha de costa foi reconhecido nas praias oceânicas fora do estuário. Dentro do estuário, uma fase erosiva na margem sul, coincide com uma fase construtiva no outro lado, e vice-versa. Na margem estuarina sul, são também percebidos ciclos de erosão e progradação de baixa freqüência, porém com um sentido inverso quando comparados aos da praia oceânica contígua. Durante o período de monitoramento das praias (fevereiro de 1991 a julho de 1992, a praia oce

  14. In-stream PIT detection, estuary wetlands - Columbia River Estuary Tidal Habitats

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The goal of the tidal-fluvial estuary study is to determine the estuary's contribution to the spatial structure and life history diversity of Columbia River salmon...

  15. Salmon habitat use, tidal-fluvial estuary - Columbia River Estuary Tidal Habitats

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The goal of the tidal-fluvial estuary study is to determine the estuary's contribution to the spatial structure and life history diversity of Columbia River salmon...

  16. Landslide and glacial lake outburst flood hazard in the Chucchún river basin, Cordillera Blanca, Peru

    Czech Academy of Sciences Publication Activity Database

    Klimeš, Jan; Vilímek, V.; Benešová, M.

    2015-01-01

    Roč. 50, č. 2 (2015), s. 173-180 ISSN 0300-5402 R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : landslide hazard * GLOFs * flood hazard * Cordillera Blanca * Peru Subject RIV: DE - Earth Magnetism, Geodesy, Geography

  17. Grain size distribution of soils within the Cordillera Blanca, Peru: An indicator of basic mechanical properties for slope stability evaluation

    Czech Academy of Sciences Publication Activity Database

    Novotný, J.; Klimeš, Jan

    2014-01-01

    Roč. 11, č. 3 (2014), s. 563-577 ISSN 1672-6316 R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : moraines * grain size distribution * shear strength * hydraulic conductivity * Cordillera Blanca Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 0.963, year: 2014

  18. Pobreza por Ingresos en Argentina y Bahía Blanca: Estimaciones de referencia y cuestiones metodológicas

    Directory of Open Access Journals (Sweden)

    María Emma Santos

    2016-11-01

    Full Text Available En este trabajo se estima la indigencia y pobreza por ingresos en 2014 y 2015 para el total de aglomerados urbanos de Argentina y para el caso particular de Bahía Blanca, una ciudad intermedia, eminentemente industrial y comercial, con altos niveles de desempleo e indigencia recientes. Se encuentra que a mediados de 2015 una de cada diez personas estaba en situación de indigencia y casi tres de cada diez estaba en situación de pobreza, lo cual equivale a 11.6 millones de personas aproximadamente. En el caso del aglomerado de Bahía Blanca, una de cada 20 personas era indigente, y el 18% era pobre, lo cual se traduce en 15 mil y 54 mil personas en situación de indigencia y pobreza. El trabajo también expone algunos puntos críticos de la metodología de medición de pobreza por ingresos que requieren reflexión y mejoramiento en el proceso de restitución de las estadísticas oficiales de pobreza.Palabras clave: pobreza, indigencia, Argentina, Bahía Blanca.Código JEL: I32. Income Poverty in Argentina and Bahía Blanca: Reference estimates and methodological issuesAbstractIn this paper we estimate the indigence and poverty by income in 2014 and 2015 for the total urban agglomerations of Argentina and for the particular case of Bahía Blanca, an intermediate city, eminently industrial and commercial, with high levels of recent unemployment and indigence. It is found that by the middle of 2015 one in ten people was in a situation of indigence and almost three out of ten were in poverty, which is equivalent to approximately 11.6 million people. In the case of the Bahía Blanca agglomerate, one in 20 people were indigent, and 18% were poor, which translates into 15,000 and 54,000 people living in extreme poverty and poverty. The paper also presents some critical points of the methodology for measuring poverty by income that require reflection and improvement in the process of restitution of official poverty statistics.Keywords: poverty

  19. Tidal effects on short-term mesozooplankton distribution in small channels of a temperate-turbid estuary, Southwestern Atlantic

    Directory of Open Access Journals (Sweden)

    Javier Chazarreta

    2015-06-01

    Full Text Available Abstract The short-term variability of mesozooplankton distribution and physicochemical variables was examined in two different channels of the Bahía Blanca Estuary, Argentina, during two tidal cycles. All the physicochemical measurements and mesozooplankton sampling were performed at a fixed site during approximately 22-23 h at 3-h intervals. Pumps were used to obtain surface and bottom mesozooplankton samples and the water speed of each stratum was measured with an Acoustic Doppler Current Profiler (ADCP. In all, 23 mesozooplanktonic taxa belonging to four phyla (Arthropoda, Annelida, Echinodermata and Chordata were identified. The most abundant taxa during the two tidal cycles were Balanus glandula larvae, Eurytemora americana and Acartia tonsa. A discernible variability in the water conditions and vertical mesozooplankton distribution (VMD different from that known for the estuary's main channel, was found in the other two selected channels. VMD varied during the tidal cycle in both channels in accordance with the channel's geomorphology and water dynamic characteristics of each of them. The variation of the abundance of the different taxa during ebb and flood currents might indicate the existence of a tidal vertical migration of the mesozooplankton as a response to particular dynamic water conditions.

  20. Health assessment of the oyster Crassostrea rhizophorae on the southern coast of Bahia, northeastern Brazil Avaliação da saúde da ostra Crassostrea rhizophorae no Litoral Sul da Bahia, nordeste do Brasil

    Directory of Open Access Journals (Sweden)

    Rosana Pinho Brandão

    Full Text Available This study investigated the health of natural stocks of the oyster Crassostrea rhizophorae on the southern coast of Bahia in northeastern Brazil, during summer and winter 2010, at three localities (sampling points in the estuaries of the Maraú (Camamu Bay and Graciosa rivers. A total of 180 oysters (30/sampling point/season were examined macroscopically for the presence of pathogens and anatomical changes. The specimens were subsequently fixed in Davidson solution, processed for paraffin embedding, sectioned and stained with Harris' hematoxylin and eosin. Histological analysis revealed the presence of Rickettsia-like organisms (RLOs, Ancistrocoma, Trichodina, Sphenophrya, Nematopsis, Urastoma, Bucephalus in the sporocyst phase, a nonspecific metacercaria, and a metacestode of genus Tylocephalum. The prevalence of infection was low except for parasitism by Nematopsis sp. which also caused histopathological changes. The presence of Bucephalus sp. caused parasitic castration. These two pathogens significantly affect the health of C. rhizophorae.Este estudo investigou a saúde de ostras da espécie Crassostrea rhizophorae de estoques naturais do Litoral Sul do Estado da Bahia, Nordeste do Brasil, durante o verão e o inverno de 2010, em três pontos amostrais distribuídos nos estuários dos rios Maraú (Baía de Camamu e Graciosa. Um total de 180 ostras (30/ponto amostral/período foram examinadas macroscopicamente para a presença de patógenos e alterações anatômicas e posteriormente fixadas em solução de Davidson, processadas para inclusão em parafina, seccionadas e coradas com hematoxilina de Harris e eosina. A análise histológica evidenciou a presença de organismos com características similares a Rickettsia (RLOs, Ancistrocoma, Trichodina, Sphenophrya, Nematopsis, Urastoma, Bucephalus em fase esporocística, metacercária inespecífica e metacestóide de Tylocephalum. As prevalências de infecção foram baixas, com exceção do

  1. Documenting Architectural Heritage in Bahia, Brazil, Using Spherical Photogrammetry

    Science.gov (United States)

    De Amorim, A. L.; Fangi, G.; Malinverni, E. S.

    2013-07-01

    The Cultural Heritage disappears at a rate higher than we are able, not only, to restore but also to document: human and natural factors, negligence or worst, deliberate demolitions put in danger the collective Architectural Heritage (AH). According to CIPA statements, the recording is important and has to follow some guidelines. The Architectural and Urban Heritage data have to be historically related, critically assessed and analyzed, before to be organized according to a thematic structure and become available for further uses. This paper shows the experiences developed by the Laboratory of Computer Graphics applied to Architecture and Design (LCAD), at the Architecture School of the Federal University of Bahia (FAUFBA), Brazil, in cooperation with the Università Politecnica delle Marche (UNIVPM, DICEA Department), Italy, in documenting architectural heritage. The research set up now has been carried out in the historical sites of Bahia, as Pelourinho neighborhood, a World Heritage by UNESCO. Other historical sites are in the plan of this survey, like the cities of Lençóis and Mucugê in Chapada Diamantina region. The aim is to build a technological platform based on low cost digital technologies and open source tools, such as Panoramic Spherical Photogrammetry, Spatial Database, Geographic Information Systems, Three-dimensional Geometric Modeling, CAD technology, for the collection, validation and dissemination of AH.

  2. Energy balance from Bahia state 2013 - series 1996-2012

    International Nuclear Information System (INIS)

    2013-01-01

    This Energy Balance from Bahia, Brazil, presents six chapters, as follows: the chapter 1 approaches the profile of the energy system, showing the structure of the Bahia state energy matrix in the year of 2012, and the modifications occurred during the period of 1996-2012. Then the consolidated information are presented, from production to final consumption, for the set of primary and secondary sources, as well as comparative tables of states x national production of major energy production; the chapter 2 analyses the development, during the period of 1996-2012, in energy supply according to the Primary and Secondary sources; the chapter 3 comprised the evolution of energy consumption by sources and according the social-economic sectors; chapter 4 focus, within a broader view, the evolution of self-sufficiency energy state, confronting the production of primary energy to the total energy demand; in chapter 5 is given the status of the Energy Transformation Centers of the state, highlighting the balances of the Refinery Landulpho Alves (RLAM) and the Power Plants of Public Service and Self-Producer and the chapter 6 contains the consolidated matrixes expressed in the years of 1980, 1985 and 1990-2012

  3. Phosphorus-uranium relationship in phosphorites from Mejillones and Bahia Inglesa-Chile

    Energy Technology Data Exchange (ETDEWEB)

    Rojo L, M; Rivera S, E

    1985-04-01

    This work shows the statistical relationship between phosphorous and uranium for the most important Chilean phosphatic ore deposits, Mejillones (II Region) and Bahia Inglesa (III Region). Geochemical data showed that the Mejillones phosphorites have a lognormal character and its correlation coefficient is 0.85. Phosphatic ore deposit at Bahia Inglesa, has a similar distribution, but in this case the correlation coefficient is smaller, about 0.81. It is concluded that the genetic relation between phosphorous and uranium at the Mejillones phosphates is closer than those of Bahia Inglesa being more economically feasible.

  4. Phosphorus-uranium relationship in phosphorites from Mejillones and Bahia Inglesa-Chile

    International Nuclear Information System (INIS)

    Rojo L, M.; Rivera S, E.

    1985-01-01

    This work shows the statistical relationship between phosphorous and uranium for the most important Chilean phosphatic ore deposits, Mejillones (II Region) and Bahia Inglesa (III Region). Geochemical data showed that the Mejillones phosphorites have a lognormal character and its correlation coefficient is 0.85. Phosphatic ore deposit at Bahia Inglesa, has a similar distribution, but in this case the correlation coefficient is smaller about 0.81. It is concluded that the genetic relation between phosphorous and uranium at the Mejillones phosphates is more closer than those of Bahia Inglesa being this more economically feasible. (Author)

  5. Carbon dioxide emissions from Indian monsoonal estuaries

    Science.gov (United States)

    Sarma Vedula, VSS

    2012-07-01

    The oceans act as a net sink for atmospheric CO2, however, the role of coastal bodies on global CO2 fluxes remains unclear due to lack of data. The estimated absorption of CO2 from the continental shelves, with limited data, is 0.22 to 1.0 PgC/y, and of CO2 emission by estuaries to the atmosphere is 0.27 PgC/y. The estimates from the estuaries suffer from large uncertainties due to large variability and lack of systematic data collection. It is especially true for Southeast Asian estuaries as the biogeochemical cycling of material are different due to high atmospheric temperature, seasonality driven by monsoons, seasonal discharge etc. In order to quantify CO2 emissions from the Indian estuaries, samples were collected at 27 estuaries all along the Indian coast during discharge wet and dry periods. The emissions of CO2 to the atmosphere from Indian estuaries were 4-5 times higher during wet than dry period. The pCO2 ranged between ~300 and 18492 microatm which were within the range of world estuaries. The mean pCO2 and particulate organic carbon (POC) showed positive relation with rate of discharge suggesting availability of high quantities of organic matter that led to enhanced microbial decomposition. The annual CO2 fluxes from the Indian estuaries, together with dry period data available in the literature, amounts to 1.92 TgC which is >10 times less than that from the European estuaries. The low CO2 fluxes from the Indian estuaries are attributed to low flushing rates and less human settlements along the banks of the Indian estuaries.

  6. U-Series Transport Studies at the Pena Blanca, Mexico Natural Analog Site

    Energy Technology Data Exchange (ETDEWEB)

    A. M. Simmons; M. T. Murrell

    2001-05-31

    Natural analogs provide a line of evidence that supports the understanding of how natural and engineered processes would occur over long time frames and large spatial scales at a potential nuclear waste repository at Yucca Mountain, Nevada. Studies of U-series disequilibria within and around uranium deposits can provide valuable information on the timing of actinide mobility and hence the stability of a potential repository over geologic time scales. The Nopal I uranium deposit at Pena Blanca, Mexico, is situated in unsaturated tuff that is similar in composition to the Topopah Spring Tuff of Yucca Mountain and closely matches other evaluation criteria for suitable natural analogs. By modeling the observed radioactive isotope disequilibria at Nopal I, we can estimate the rates of sorption-desorption and dissolution-precipitation of the radionuclides over time. Such information is vital to the testing or validation of performance assessment models for geologic nuclear waste disposal.

  7. Soil-water retention curve and beginning of monitoring in Tierra Blanca Joven (TBJ)

    International Nuclear Information System (INIS)

    Chavez, Jose; Lopez, Reynaldo; Kopecky, Lubomir; Landaverde, Jose

    2013-01-01

    The areas covered by the volcanic tephras Tierra Blanca Joven (TBJ) in El Salvador, was suffered mass movements, liquefaction and erosion during the rainy season or when major earthquakes occur, causing important environmental, social and economic losses. A pressure plate, centrifuge and filter paper were used to build a Soil-Water Retention Curve, obtain the characterization of these unsaturated soil, suction values of the fall unit of TBJ. The use of this curve into finite elements software can help to acquire shear strength and permeability properties. The filter paper showed to be a practical method but close to saturation the pressure plate is needed.Scatter results were observed with the centrifuge. The Quickdraw tensiometre (suction) and TMS3 (soil moisture content) are being used in field test to proposed a field methodology for an early warning system for the slopes, that could help in urban planning and risk assessment. (author)

  8. Soil-water retention curve and beginning of monitoring in Tierra Blanca Joven (TBJ)

    International Nuclear Information System (INIS)

    Chavez, Jose A.; Lopez, Reynaldo; Kopecky, Lubomir; Landaverde, Jose

    2013-01-01

    The areas covered by the Tierra Blanca Joven volcanic tephra (TBJ) have suffered hillside movements, liquefaction and erosion causing important environmental, social and economic losses during the rainy season or when earthquakes occur in El Salvador. Suction values of a TBJ drop unit were obtained with the pressure cooker, centrifuge and filter paper to construct the Soil-Water Retention Curve to initiate the characterization of these partially saturated soils. The use of this curve in finite element programs has helped to know the shear stresses and permeability. The filter paper has proved to be a practical method but it is necessary to use the pressure cooker as it becomes saturated. Field tests with tensiometer (suction) and TMS3 (humidity) have been carried out to propose field methodology for an early warning system for hillsides, which can help urban planning and risk studies. (author)

  9. U-Series Transport Studies at the Pena Blanca, Mexico Natural Analog Site

    International Nuclear Information System (INIS)

    Simmons, A. M.; Murrell, M. T.

    2001-01-01

    Natural analogs provide a line of evidence that supports the understanding of how natural and engineered processes would occur over long time frames and large spatial scales at a potential nuclear waste repository at Yucca Mountain, Nevada. Studies of U-series disequilibria within and around uranium deposits can provide valuable information on the timing of actinide mobility and hence the stability of a potential repository over geologic time scales. The Nopal I uranium deposit at Pena Blanca, Mexico, is situated in unsaturated tuff that is similar in composition to the Topopah Spring Tuff of Yucca Mountain and closely matches other evaluation criteria for suitable natural analogs. By modeling the observed radioactive isotope disequilibria at Nopal I, we can estimate the rates of sorption-desorption and dissolution-precipitation of the radionuclides over time. Such information is vital to the testing or validation of performance assessment models for geologic nuclear waste disposal

  10. Surface runoff fluxes of nutrients in montane forests in Piedras Blancas region, Antioquia (Colombia)

    International Nuclear Information System (INIS)

    Ruiz Suescun, Oscar Andres; Acosta Jaramillo, Juan Jose; Leon Pelaez, Juan Diego

    2005-01-01

    In natural montane oak forests (Quercus humboldtii Bonpl.), pine (Pinus patula Schltdl and cham.) and cypress (Cupressus lusitanica Mill.) plantations in the region of Piedras Blancas, Antioquia, surface runoff flows (SRF) were measured over 16 months. Runoff was measured using 2 m wide x 10 m long runoff bounded plots, collector tanks and a volumetric counter system. Nutrient flows for the oak forest, pine and cypress plantations were, respectively: P total (0,51, 0,08 and 0,42 kg ha-y), Ca (0,13, 0,21 and 1,27 kg ha- y); Mg (0,07, 0,07 and 0,34 kg ha-y); K (0,89, 0,71 and 2,60 kg ha-y); Fe (0,04, 0,04 and 0,47 kg ha-y) and Mn (0,01, 0,01 and 0,08 kg ha-y)

  11. Numerical analysis of a proposed percolation experiment at the Pena Blanca natural analog site

    International Nuclear Information System (INIS)

    Green, R.T.; Rice, G.

    1995-01-01

    A field-scale percolation test is proposed for the Pena Blanca natural analog site near Chihuahua, MX. To aid in design of the field test, the V-TOUGH two-phase flow simulator was applied to model percolation of water through 8 to 10 m of partially saturated fractured tuff. The rock was characterized as a composite medium using measured hydraulic properties for the rock matrix and estimated values for the fractures. Measured matrix permeability varied over four orders of magnitude and fracture apertures were estimated to range from 10 to 1,000 μm. Water arrival times were predicted to vary between one day to 10,000 yr. The utility of the composite model and other representations of flow through fractured porous media can be tested using results from the field scale infiltration test data

  12. Offshore geology and geomorphology from Point Piedras Blancas to Pismo Beach, San Luis Obispo County, California

    Science.gov (United States)

    Watt, Janet Tilden; Johnson, Samuel Y.; Hartwell, Stephen R.; Roberts, Michelle

    2015-01-01

    Marine geology and geomorphology were mapped along the continental shelf and upper slope between Point Piedras Blancas and Pismo Beach, California. The map area is divided into the following three (smaller) map areas, listed from north to south: San Simeon, Morro Bay, and Point San Luis. Each smaller map area consists of a geologic map and the corresponding geophysical data that support the geologic mapping. Each geophysical data sheet includes shaded-relief multibeam bathymetry, seismic-reflection-survey tracklines, and residual magnetic anomalies, as well as a smaller version of the geologic map for reference. Offshore geologic units were delineated on the basis of integrated analysis of adjacent onshore geology, seafloor-sediment and rock samples, multibeam bathymetry and backscatter imagery, magnetic data, and high-resolution seismic-reflection profiles. Although the geologic maps are presented here at 1:35,000 scale, map interpretation was conducted at scales of between 1:6,000 and 1:12,000.

  13. [Drunk driving in professional drivers in the Vía Blanca highway in Cuba].

    Science.gov (United States)

    Guanche Garcell, Humberto; Suárez Enríquez, Tomás; Gutiérrez García, Francisco; Martínez Quesada, Carlos; Mendoza Pérez, Ramón

    2006-01-01

    To determine the frequency of drunk driving in professional drivers (Via Blanca, Havana City), we carried out a descriptive study of 832 drivers selected by multistage stratified sampling. A structured interview with each driver was carried out to record the variables under study, and a breath alcohol test was subsequently performed. The frequency of drunk driving was 8.18% (95% CI, 5.94%-10.42%), with a predominance of drivers with alcohol levelsDrunk driving was more frequent in "high risk" hours, in drivers aged between 40 and 49 years old (10.3%), and in those with 15 to 24 years of experience (11.02%). The frequency of drunk driving found in this study highlights the need to design traffic accident prevention strategies.

  14. Fatty acid composition of muscle and adipose tissues of organic and conventional Blanca Andaluza suckling kids

    Directory of Open Access Journals (Sweden)

    F. De la Vega

    2013-01-01

    Full Text Available Interest in the preservation of autochthonous breeds such as the Blanca Andaluza goat (meat breed, raised under grazing-based management, has recently increased among Spanish farmers. A study of the possibilities of transformation to organic production needs to analyze the quality of their products. The aim of this study was to evaluate the fatty acid (FA composition of muscle and adipose tissues of Blanca Andaluza goat kids under organic and conventional grazing–based management system. Twenty-four twin kids (12 males, 12 females were selected from each system. The FA profile was determined in the longissimus thoracis muscle, kidney and pelvic fat. The percentages of C17:0, C17:1, C20:1, C20:4 n-6, C22:2 and several n-3 FAs were higher in organic meat; C12:0, C18:1 trans-11, CLA and C20:5 n-3 were lower in organic meat. The fat depots from the conventional kids showed lower percentages of C12:0, C14:0, C15:0, C17:0, C17:1, C18:3 n-3 and atherogenicity index, and higher percentage of C18:0. In the pelvic fat, the conventional kids displayed lower percentages of C16:0, C18:2 n-6 cis, PUFA, n-3 and n-6 FAs, and greater percentages of C18:1 n-9 cis and MUFA. The conventional kids displayed a major n6:n3 ratio in the kidney fat. No gender differences were observed. Significant differences were found only in some FA percentages of muscle and adipose tissues of suckling kids raised in organic and conventional livestock production systems, and due to this reason conventional grazing–based management farms could easily be transformed into organic production.

  15. Cultivo de cachama blanca en altas densidades y en dos sistemas cerrados

    Directory of Open Access Journals (Sweden)

    Germán Poleo

    2011-04-01

    Full Text Available El objetivo de este trabajo fue evaluar la tolerancia de la cachama blanca, Piaractus brachypomus, a cultivos en altas densidades en sistemas cerrados. Novecientos alevines de 44,3±26 g de peso, se distribuyeron en seis tanques de concreto, con 4,8 m³ de agua. Tres tanques presentaron cero recambio de agua (SCR, y en otros tres, el agua se hizo circular a través de un bioclarificador (SRA. Ambos tratamientos presentaron fuerte aireación para mantener los sólidos en suspensión y suministrar aire. Los peces se alimentaron a saciedad con pienso comercial por 192 días. Los parámetros de calidad de agua como: oxígeno disuelto, amonio total, nitritos, nitratos, alcalinidad, dureza, temperatura y pH, se midieron semanalmente. Los peces en el SCR crecieron a una tasa de 2,34±0,05 g por día, y tuvieron conversión alimenticia de 1,5±0,06, densidad final de 12,96±0,53 kg m-3, y peso final de 449,5±99 g. En el SRA, los peces crecieron 2,33±0,03 g por día, con conversión alimenticia de 1,6±0,07, densidad final de 12,13±1,12 kg m-3, y peso final de 446,5±10 g. La cachama blanca puede ser cultivada en sistemas cerrados con cero recambio de agua en altas densidades.

  16. Measurements of light absorbing particulates on the glaciers in the Cordillera Blanca, Peru

    Science.gov (United States)

    Schmitt, C. G.; All, J. D.; Schwarz, J. P.; Arnott, W. P.; Cole, R. J.; Lapham, E.; Celestian, A.

    2014-10-01

    Glaciers in the tropical Andes have been rapidly losing mass since the 1970s. In addition to the documented increase in air temperature, increases in light absorbing particulates deposited on glaciers could be contributing to the observed glacier loss. Here we report on measurements of light absorbing particulates sampled from glaciers during three surveys in the Cordillera Blanca in Peru. During three research expeditions in the dry seasons (May-August) of 2011, 2012 and 2013, two hundred and forty snow samples were collected from fifteen mountain peaks over altitudes ranging from 4800 to nearly 6800 m. Several mountains were sampled each of the three expeditions and some mountains were sampled multiple times during the same expedition. Collected snow samples were melted and filtered in the field then later analyzed using the Light Absorption Heating Method (LAHM), a new technique that measures the ability of particulates on filters to absorb visible light. LAHM results have been calibrated using filters with known amounts of fullerene soot, a common industrial surrogate for black carbon (BC). As sample filters often contain dust in addition to BC, results are presented in terms of effective Black Carbon (eBC). During the 2013 survey, snow samples were collected and kept frozen for analysis with a Single Particle Soot Photometer (SP2). Calculated eBC mass from the filter analysis and the SP2 refractory Black Carbon (rBC) results were well correlated (r2 = 0.92). These results indicate that a substantial portion of the light absorbing particulates in the more polluted areas were likely BC. The three years of data show that glaciers in the Cordillera Blanca Mountains close to human population centers have substantially higher levels of eBC (as high as 70 ng g-1) than remote glaciers (as low as 2.0 ng g-1 eBC), indicating that population centers can influence local glaciers by sourcing BC.

  17. Measurements of light-absorbing particles on the glaciers in the Cordillera Blanca, Peru

    Science.gov (United States)

    Schmitt, C. G.; All, J. D.; Schwarz, J. P.; Arnott, W. P.; Cole, R. J.; Lapham, E.; Celestian, A.

    2015-02-01

    Glaciers in the tropical Andes have been rapidly losing mass since the 1970s. In addition to the documented increase in temperature, increases in light-absorbing particles deposited on glaciers could be contributing to the observed glacier loss. Here we report on measurements of light-absorbing particles sampled from glaciers during three surveys in the Cordillera Blanca Mountains in Peru. During three research expeditions in the dry seasons (May-August) of 2011, 2012 and 2013, 240 snow samples were collected from 15 mountain peaks over altitudes ranging from 4800 to nearly 6800 m. Several mountains were sampled each of the 3 years and some mountains were sampled multiple times during the same year. Collected snow samples were melted and filtered in the field then later analyzed using the Light Absorption Heating Method (LAHM), a new technique that measures the ability of particles on filters to absorb visible light. LAHM results have been calibrated using filters with known amounts of fullerene soot, a common industrial surrogate for black carbon (BC). As sample filters often contain dust in addition to BC, results are presented in terms of effective black carbon (eBC). During the 2013 survey, snow samples were collected and kept frozen for analysis with a Single Particle Soot Photometer (SP2). Calculated eBC mass from the LAHM analysis and the SP2 refractory black carbon (rBC) results were well correlated (r2 = 0.92). These results indicate that a substantial portion of the light-absorbing particles in the more polluted regions were likely BC. The 3 years of data show that glaciers in the Cordillera Blanca Mountains close to human population centers have substantially higher levels of eBC (as high as 70 ng g-1) than remote glaciers (as low as 2.0 ng g-1 eBC), indicating that population centers can influence local glaciers by sourcing BC.

  18. Spatial distribution of canine zoonotic enteroparasites in Bahía Blanca, Argentina

    Directory of Open Access Journals (Sweden)

    Luciano F La Sala

    2015-03-01

    Full Text Available The objectives of this research were: (1 to determine the occurrence of zoonotic enteroparasites in dog feces from Bahía Blanca, Argentina; (2 to characterize the spatial distribution of the parasites found in association with the quality of life index (QLI in neighborhoods of Bahía Blanca; and (3 to determine if the presence of a particular parasite genus in a stool sample was facilitated or impeded by the presence of other parasite genera. Samples of dog stools (n = 475 were collected between December 2012 and December 2013 in areas with varying QLI. The association between QLI values and the presence of parasites was analyzed using logistic regression. Overall enteroparasite occurrence was 36.6%. Parasitic forms found included nematode larvae, cysts of Blastocystis spp., Giardia spp., and oocysts of Cryptosporidium spp., and eggs of Ancylostoma caninum, Toxocara canis, cestodes and Trichuris spp. For certain enteroparasites, we detected significant associations between their occurrence and QLI. Feces collected in areas with medium and low QLI were 2.46 and 5.43 times more likely, respectively, to contain A. caninum than stools from the high-QLI area. Samples from areas with low QLI were 2.36 times more likely to contain Trichuris spp. than those from the high QLI area. Regarding protozoa, feces from areas with low QLI were 2.4 times more likely to be positive than those from areas with high QLI. We demonstrated that canine zoonotic parasites have a wide distribution in the study area, and that occurrence is higher in neighborhoods with lower QLI.

  19. Spatial distribution of canine zoonotic enteroparasites in Bahía Blanca, Argentina.

    Science.gov (United States)

    La Sala, Luciano F; Leiboff, Anastasia; Burgos, Julián M; Costamagna, Sixto R

    2015-01-01

    The objectives of this research were: (1) to determine the occurrence of zoonotic enteroparasites in dog feces from Bahía Blanca, Argentina; (2) to characterize the spatial distribution of the parasites found in association with the quality of life index (QLI) in neighborhoods of Bahía Blanca; and (3) to determine if the presence of a particular parasite genus in a stool sample was facilitated or impeded by the presence of other parasite genera. Samples of dog stools (n=475) were collected between December 2012 and December 2013 in areas with varying QLI. The association between QLI values and the presence of parasites was analyzed using logistic regression. Overall enteroparasite occurrence was 36.6%. Parasitic forms found included nematode larvae, cysts of Blastocystis spp., Giardia spp., and oocysts of Cryptosporidium spp., and eggs of Ancylostoma caninum, Toxocara canis, cestodes and Trichuris spp. For certain enteroparasites, we detected significant associations between their occurrence and QLI. Feces collected in areas with medium and low QLI were 2.46 and 5.43 times more likely, respectively, to contain A. caninum than stools from the high-QLI area. Samples from areas with low QLI were 2.36 times more likely to contain Trichuris spp. than those from the high QLI area. Regarding protozoa, feces from areas with low QLI were 2.4 times more likely to be positive than those from areas with high QLI. We demonstrated that canine zoonotic parasites have a wide distribution in the study area, and that occurrence is higher in neighborhoods with lower QLI. Copyright © 2014 Asociación Argentina de Microbiología. Publicado por Elsevier España, S.L.U. All rights reserved.

  20. Torres Blancas

    Directory of Open Access Journals (Sweden)

    José Manuel López-Peláez

    2016-01-01

    Full Text Available Nella Madrid degli anni sessanta l’architetto navarro Sáenz de Oíza sperimenta la costruzione di un edificio residenziale a torre in cemento armato. Risultato della felice relazione con un imprenditore mecenate, Juan Huarte, l’edificio si articola nella variazione tipologica di alloggi ad L e duplex, di locali per uffici e servizi, fino agli spazi ad uso comune, come la piscina e il ristorante della terrazza sul tetto, per proporsi come modello di piccola città autosufficiente. / In 1960s Madrid, the Navarrese architect Sáenz de Oíza tried constructing a residential tower in reinforced concrete. The happy result of a partnership with an entrepreneur patron, Juan Huarte, the building is split into L-shaped dwellings and duplexes, rooms for offices and services, as well as communal spaces, such as a swimming pool and a restaurant on the roof terrace, to exemplify a model of a small, self-sufficient town.

  1. Composition and natural history notes of the coastal snake assemblage from Northern Bahia, Brazil

    Science.gov (United States)

    Marques, Ricardo; Mebert, Konrad; Fonseca, Érica; Rödder, Dennis; Solé, Mirco; Tinôco, Moacir Santos

    2016-01-01

    Abstract Information about the snake diversity and their natural history from the Atlantic forest domain in Brazil refer mostly to inland forests than to coastal region. Within the state of Bahia, this knowledge is concentrated to the southeastern coastal stretch. Herein we report on the diversity of snakes from the restinga, ombrophilous forest and anthropogenic environment from the northern Atlantic coast of Bahia. We sampled nine sites for three years and visited four museum collections. Furthermore, we provide anecdotal natural history information, voucher analyses, literature complements, and a key to fascilitate species identification. We report a total of 774 snakes belonging to 50 species and 23 new distribution records for northeastern coast of Bahia, supplemented by new data on feeding and reproduction. The number of detected species is similar to numbers obtained in comparable studies from other Brazilian ecoregions. This study reports and focuses for the first time on all known species of snakes from the northeastern coast of Bahia. PMID:27594800

  2. Composition and natural history notes of the coastal snake assemblage from Northern Bahia, Brazil.

    Science.gov (United States)

    Marques, Ricardo; Mebert, Konrad; Fonseca, Érica; Rödder, Dennis; Solé, Mirco; Tinôco, Moacir Santos

    2016-01-01

    Information about the snake diversity and their natural history from the Atlantic forest domain in Brazil refer mostly to inland forests than to coastal region. Within the state of Bahia, this knowledge is concentrated to the southeastern coastal stretch. Herein we report on the diversity of snakes from the restinga, ombrophilous forest and anthropogenic environment from the northern Atlantic coast of Bahia. We sampled nine sites for three years and visited four museum collections. Furthermore, we provide anecdotal natural history information, voucher analyses, literature complements, and a key to fascilitate species identification. We report a total of 774 snakes belonging to 50 species and 23 new distribution records for northeastern coast of Bahia, supplemented by new data on feeding and reproduction. The number of detected species is similar to numbers obtained in comparable studies from other Brazilian ecoregions. This study reports and focuses for the first time on all known species of snakes from the northeastern coast of Bahia.

  3. Trapping of sediment in tidal estuaries

    NARCIS (Netherlands)

    Chernetsky, A.

    2012-01-01

    An estuary is an ideal habitat for various aquatic species. At the same time, estuaries and adjacent rivers are used as fast navigation routes between the coastal and inland territories. The fast industrial development and the subsequent growth of cities and trade have led to large-scale

  4. Microplastic in three urban estuaries, China

    International Nuclear Information System (INIS)

    Zhao, Shiye; Zhu, Lixin; Li, Daoji

    2015-01-01

    Estuarine Microplastics (MPs) are limited to know globally. By filtering subsurface water through 330 μm nets, MPs in Jiaojiang, Oujiang Estuaries were quantified, as well as that in Minjiang Estuary responding to Typhoon Soulik. Polymer matrix was analyzed by Raman spectroscopy. MP (<5 mm) comprised more than 90% of total number plastics. The highest MPs density was found in Minjiang, following Jiaojiang and Oujiang. Fibers and granules were the primary shapes, with no pellets found. Colored MPs were the majority. The concentrations of suspended microplastics determine their bioavailability to low trophic organisms, and then possibly promoting the transfer of microplastic to higher trophic levels. Polypropylene and polyethylene were the prevalent types of MPs analyzed. Economic structures in urban estuaries influenced on MPs contamination levels. Typhoon didn't influence the suspended MP densities significantly. Our results provide basic information for better understanding suspended microplastics within urban estuaries and for managerial actions. - Highlights: • Suspended microplastic were investigated within three densely populated/developed urban estuaries, China. • Economical structures may contribute to the abundances of microplastic particles within the studied estuaries. • Typhoon Soulik didn't influence microplastic densities in the water column of Minjiang Estuary. • Microplastics (<5 mm in diameter) dominated more than 90% of the total plastic by number. - Suspended microplastics (MPs) levels were quantified within three urban estuaries, China. MPs densities were consistent with the urban economical structure, and that in Minjiang were unaffected by Typhoon.

  5. The Mntafufu and Mzamba River estuaries

    African Journals Online (AJOL)

    1989-03-14

    Mar 14, 1989 ... A survey of the fish fauna of Transkei estuaries. Part Four: The Mntafufu and Mzamba River estuaries. E.E. Plumstead • and J.F. Prinsloo. Department of Zoology, University of Transkei, Private Bag X1, Unitra, Umtata, Republic of Transkei. H.J. Schoonbee. Department of Zoology, Rand Afrikaans University, ...

  6. DISTRIBUTION OF FATAL ACCIDENT TRANSPORT BETWEEN STATE WORKERS OF BAHIA AND BRAZIL

    OpenAIRE

    Jéssica de Jesus dos Santos; Kionna Oliveira Bernardes Santos

    2016-01-01

    Studies on the situation of mortality from traffic accidents among workers are still insufficient. This study aimed to describe the mortality rates for traffic accidents / path between state workers of Bahia and Brazil. This is a quantitative, descriptive study of fatal work accidents related to traffic accidents / path with the Mortality Information System data in the period from 2009 to 2011. The results show 317 reported deaths from traffic accidents in Bahia and...

  7. Distribution of Cs137 in soils from Bahia state, Brazil

    International Nuclear Information System (INIS)

    Sakai, T.

    1977-01-01

    A high-resolution gamma-ray spectrometry method was developed in order to study the distribution of Cs 137 in topsoils of State of Bahia (Brazil). The results has shown concentrations varying between 0.6 and 6.0 nCi/m 2 . Correlation of the Cs 137 concentration with environmental and ohysico-chemical parameters has shown a tendency for greatest accumulation in soils with regions of greatest precipitation rates: 2.0 nCi/m 2 , on the average, for regions with 700mm to 1,000 mm/year and 2.8 nCi/m 2 , on the average, in regions with 1,700 mm to 2,000 mm/year. On the other hand, an anti-correlation between this radionuclide and both calcium and clay content, for soils of similar type and under similar climatic conditions is seen. (C.D.G.) [pt

  8. Cacao breeding in Bahia, Brazil - strategies and results

    Directory of Open Access Journals (Sweden)

    Uilson Vanderlei Lopes

    2011-01-01

    Full Text Available Cacao was introduced in Bahia in 1756, becoming later the largest producer state in the country. In order to supportthe planting of cacao in the region, a breeding program was established by CEPEC at the beginning of the 1970s. For a long time,the program consisted in testing new hybrids (full-sibs and releasing a mixture of the best ones to farmers. Lately, particularly afterthe witches´ broom arrival in the region, in 1989, recurrent breeding strategies were implemented, aiming mainly the developmentof clones. From 1993 to 2010, more than 500 progenies, accumulating 30 thousand trees, were developed by crossing many parentswith resistance to witches´ broom, high yield and other traits. In this period, more than 500 clones were put in trials and 39 clonesand 3 hybrids were released to farmers. In this paper the strategies and results achieved by the program are reviewed. Overall theprogram has good interface with pathology and genomic programs.

  9. Annular subvalvular left ventricular aneurysm in Bahia, Brazil.

    Science.gov (United States)

    Guimarães, A C; Filho, A S; Esteves, J P; Abreu, W N; Vinhaes, L A; de Almeida Souza, J A; Machado, A

    1976-10-01

    Two cases of left ventricular aneurysm, a 16-year-old black boy and a 23-year-old white girl, from Bahia, Brazil, are presented. In both patients there was enlargement of the cardiac silhouette and a prominent bulge of the left inferior border. On the right oblique view a ring of calcium at the ventricular opening of the aneurysms was visualized. A left ventriculogram showed a huge aneurysm in the first case and a bulge on the lateral wall of the left ventricle in the other. Cardiac catheterization showed a rise in left and right ventricular end-diastolic pressures and in the mean pulmonary artery pressure. In the first case the contour of the right ventricular pressure curve showed a restrictive pattern. The similarities of these aneurysms with the annular submitral type described in young black Africans are stressed.

  10. Environmental impact reduction through ecological planning at Bahia Magdalena, Mexico.

    Science.gov (United States)

    Malagrino, Giovanni; Lagunas, Magdalena; Rubio, Alfredo Ortega

    2008-03-01

    For analyzing basic marine and coastal characteristics we selected the potential sites where shrimp culture could be developed in a large coastal zone, Bahia Magdalena, Baja California Sur, Mexico. Based on our analysis, 6 sites were preselected and field stages of work were then developed to assess the precise suitability of each site in order to develop the proposed aquaculture activities. In ranking the suitability we were able to recommend the most appropriate places to develop shrimp culture in this region. Also, knowing the exact biological, physico-chemical and social environment, we determined the best species to cultivate, the recommended total area and the methodology to be used to lessen the environmental impact and to obtain the maximum profitability Our methodology could be used not only to select appropriate sites for shrimp culture in other coastal lagoons, but it also could be applied to assess the suitability in a quick and accurate way, of any other production activity in coastal zones.

  11. REDES DO COMÉRCIO DE RUA DE SALVADOR, BAHIA

    Directory of Open Access Journals (Sweden)

    Ana Cláudia Nogueira Maia

    2015-01-01

    Full Text Available Este trabajo representa un estudio de caso de comercio de la calle que se produce en la Centralización Iguatemi y Avenida Lima e Silva, en Salvador, Bahia. Al caminar por las calles es la diversidad notable que esta actividad presenta son bienes de todo tipo, ropa, electrónica, productos alimenticios y los que están diseñados para satisfacer una necesidad momentánea. Buscamos entender el camino que lleva a la diversidad bienes desde la producción hasta el consumo, se analizan los productos de “extranjero” en un intento de controlar todo el trayecto del camino para ellos. Por lo tanto, desarrollamos un entendimiento en torno a redes posibles formados detrás de la venta ambulante, es decir, las redes de suministro de este comercio.

  12. Patterns of sediment dispersion coastwise the State of Bahia - Brazil

    Directory of Open Access Journals (Sweden)

    ABÍLIO CARLOS DA SILVA PINTO BITTENCOURT

    2000-06-01

    Full Text Available Using the average directions of the main wave-fronts which approach the coast of Bahia State - coinciding with that of the main wind occurring in the area - and of their periods, we define a wave climate model based on the construction of refraction diagrams. The resulting model of sediment transport was able to reproduce, in a general way, the sediment dispersion patterns furnished by geomorphic indicators of the littoral drift. These dispersion patterns control the generation of different types of sediment accumulations and of coastal stretches under erosion. We demonstrate that the presence of the Abrolhos and Corumbaú Point coral reefs is an important factor controlling the sediment dispersion patterns, since them act as a large protection against the waves action.

  13. Volumetry of Genipa americana in homogeneous plantation in Southwest Bahia

    Directory of Open Access Journals (Sweden)

    Mislene Barbosa Rocha

    2015-12-01

    Full Text Available This research aim to evaluate the volumetric estimates obtaining for Genipa americana, commonly known as jenipapeiro, in pure plantation in the municipality of Vitória da Conquista, Bahia State, Brazil. To determine individual volume, 100 standing trees were rigorously cubed. Ten volumetric models were adjusted. The best models were selected based on the selection criteria of weighted value of statistical parameters scores and residues distribution. Volume estimates were obtained by form factor and by adjusted equations. To validate the estimates, the calculate volumes were compared to measured data. Among the used methods to predict wood volume, the adjusted volumetric equations are recommended. Spurr (Log model present the best performance to estimate total wood volume.

  14. Envenenamento por Tityus stigmurus (Scorpiones; Buthidae no Estado da Bahia, Brasil Envenomation by Tityus stigmurus (Scorpiones; Buthidae in Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Rejâne Maria Lira-da-Silva

    2000-06-01

    Full Text Available A presente investigação é um estudo descritivo dos aspectos clínicos dos acidentes causados pelo escorpião Tityus stigmurus no Estado da Bahia, Brasil. Foram analisados 237 casos confirmados, tratados pelo Centro de Informações Antiveneno da Bahia (CIAVE, no período de 1982-1995. O envenenamento por T. stigmurus caracterizou-se por manifestações locais: dor (94,4%, dormência (30%, edema (17,8%, eritema (17,8% e parestesia (15,6% e gerais: cefaléia (14%, vômitos (4,4% e sudorese (3,3%. A maioria dos envenenamentos (94% foi leve e todos evoluíram para cura. A ausência de letalidade, com o restabelecimento dos pacientes, inclusive casos graves, sugere a eficácia do tratamento com o antiveneno específico, apesar do veneno desta espécie não estar presente no pool de produção nacional do soro. Há necessidade de revisão dos critérios regionais nos esquemas atuais de soroterapia. Os dados apontam para a semelhança da gravidade do envenenamento por T. serrulatus, com exceção da ocorrência de óbitos e complicações sistêmicas.The present investigation is a descriptive study regarding the clinical aspects of accidents caused by the scorpion Tityus stigmurus in Bahia, Brazil. We analyzed 237 confirmed cases treated by the Antivenom Information Centre (CIAVE from 1982 to 1995. Envenomation by T. stigmurus was mainly characterized by local symptoms: pain (94.4%, dormancy (30.0%, edema (17.8%, erythema (17.8, paresthesia (15.6% and general manifestations such as headache (4.4%, vomiting (4.4% and sudoresis (3.3%. Most of the envenomation cases were mild (94% and all were successfully cured. Although T. stigmurus venom is not in the pool of anti-venom serum (SAE, the absence of lethality and benign nature of the cases suggest the efficiency of SAE. With the exception of deaths and systemic complications, envenoming gravity was similar to those of Tityus serrulatus.

  15. Preferencias de consumo de cuatro forrajes por venado cola blanca (Odocoileus virginianus) mantenidos en cautiverio en Yucatan

    OpenAIRE

    Israel Fernando Castillo-López; Rubén Cornelio Montes-Pérez; Carlos Eduardo Rodríguez-Molano

    2011-01-01

    El  venado cola blanca  (Odocoileus  virginianus.Zimmermann) es uno de los recursos silvestres y cinegéticos más  importantes  en México.  Sin embargo,  los estudios que existen sobre  su crianza en cautiverio son insuficientes para optimizar su producción. El objetivo planteado en este trabajo fue  evaluar  la  preferencia  relativa  de  cuatro forrajes,  comparar  el  consumo  ad  libitum  del forraje nativo preferido contra un pasto de corte, en venados cola blanca mantenidos en cautiverio...

  16. The agricultural sector in Bahia State: economic outlook and energy intensity; O setor agropecuario no estado da Bahia: perspectivas economicas e intensidade energetica

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Claudio Bezerra de [Faculdade Apoio, Lauro de Freitas, BA (Brazil); Bajay, Sergio Valdir [Universidade Estadual de Campinas (NIPE/UNICAMP), SP (Brazil). Nucleo Interdisciplinar de Planejamento Energetico

    2006-07-01

    The main characteristics of the rural economy in the State of Bahia are presented in this paper, together with the evolution of its main components in the last years and the growth perspectives for the next years. A more detailed analysis is carried out for the rural areas in the state which present higher development potential and for their respective crops . The progression of the state of Bahia' shares in the national rural economy's value added and the energy intensity changes of the main energy carriers employed in this sector are also presented in the paper. (author)

  17. The agricultural sector in Bahia State: economic outlook and energy intensity; O setor agropecuario no estado da Bahia: perspectivas economicas e intensidade energetica

    Energy Technology Data Exchange (ETDEWEB)

    Carvalho, Claudio Bezerra de [Faculdade Apoio, Lauro de Freitas, BA (Brazil); Bajay, Sergio Valdir [Universidade Estadual de Campinas (NIPE/UNICAMP), SP (Brazil). Nucleo Interdisciplinar de Planejamento Energetico

    2006-07-01

    The main characteristics of the rural economy in the State of Bahia are presented in this paper, together with the evolution of its main components in the last years and the growth perspectives for the next years. A more detailed analysis is carried out for the rural areas in the state which present higher development potential and for their respective crops . The progression of the state of Bahia' shares in the national rural economy's value added and the energy intensity changes of the main energy carriers employed in this sector are also presented in the paper. (author)

  18. Remote Sensing Analysis of the Sierra Blanca (Faskin Ranch) Low-Level Radioactive Waste Disposal Site, Hudspeth County, Texas

    International Nuclear Information System (INIS)

    LeMone, D. V.; Dodge, R.; Xie, H.; Langford, R. P.; Keller, G. R.

    2002-01-01

    Remote sensing images provide useful physical information, revealing such features as geological structure, vegetation, drainage patterns, and variations in consolidated and unconsolidated lithologies. That technology has been applied to the failed Sierra Blanca (Faskin Ranch) shallow burial low-level radioactive waste disposal site selected by the Texas Low-Level Radioactive Waste Disposal Authority. It has been re-examined using data from LANDSAT satellite series. The comparison of the earlier LANDSAT V (5/20/86) (30-m resolution) with the later new, higher resolution ETM imagery (10/23/99) LANDSAT VII data (15-m resolution) clearly shows the superiority of the LANDSAT VII data. The search for surficial indications of evidence of fatal flaws at the Sierra Blanca site utilizing was not successful, as it had been in the case of the earlier remote sensing analysis of the failed Fort Hancock site utilizing LANDSAT V data. The authors conclude that the tectonic activity at the Sierra Blanca site is much less recent and active than in the previously studied Fort Hancock site. The Sierra Blanca site failed primarily on the further needed documentation concerning a subsurface fault underneath the site and environmental justice issues. The presence of this fault was not revealed using the newer LANDSAT VII data. Despite this fact, it must be remembered that remote sensing provides baseline documentation for determining future physical and financial remediation responsibilities. On the basis of the two sites examined by LANDSAT remote sensing imaging, it is concluded that it is an essential, cost-effective tool that should be utilized not only in site examination but also in all nuclear-related facilities

  19. Landslides in moraines as triggers of glacial lake outburst floods: example from Palcacocha Lake (Cordillera Blanca, Peru)

    Czech Academy of Sciences Publication Activity Database

    Klimeš, Jan; Novotný, J.; Novotná, I.; Urries de, B.J.; Vilímek, V.; Emmer, Adam; Strozzi, T.; Kusák, Michal; Rapre, A.C.; Hartvich, Filip; Frey, H.

    2016-01-01

    Roč. 13, č. 6 (2016), s. 1461-1477 ISSN 1612-510X R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 ; RVO:67179843 Keywords : landslides * moraines * glacial lakes * slope stability calculation * glacial lake outburst floods * impact wave models * Cordillera Blanca Subject RIV: DE - Earth Magnetism, Geodesy, Geography; DE - Earth Magnetism, Geodesy, Geography (UEK-B) Impact factor: 3.657, year: 2016

  20. Collaborative Potential between National Estuary Programs ...

    Science.gov (United States)

    Estuaries are among the most productive ecosystems in the world, providing unique habitat for freshwater and marine species as well as valuable social and economic benefits. The wealth of ecosystem goods and services from estuaries has led to growth and development of human communities in adjacent areas and an increase in human activities that can adversely affect water quality and critical habitat. Managing for sustainable estuaries requires a balance of environmental concerns with community social and economic values. This has created an opportunity to leverage Environmental Protection Agency (EPA) scientific knowledge and tools with National Estuary Program (NEP) planning and management expertise to address environmental challenges in important estuarine ecosystems. The non-regulatory National Estuary Program (NEP) was outlined in the Clean Water Act to provide stakeholders an opportunity to monitor and manage ‘nationally significant’ estuaries. Currently there are 28 estuaries in the NEP, broadly distributed across the Atlantic, Pacific and Gulf Coasts, and in Puerto Rico. The local NEP management conferences must address a variety of environmental issues, from water quality and natural resources to coastal and watershed development. While the underlying objectives of each NEP are quite similar, each has unique landscapes, land uses, waterbodies, habitats, biological resources, economies and social culture. Consequently, the effects and severity of anthr

  1. Characterizing seston in the Penobscot River Estuary.

    Science.gov (United States)

    Meseck, Shannon L; Li, Yaqin; Sunila, Inke; Dixon, Mark; Clark, Paul; Lipsky, Christine; Stevens, Justin R; Music, Paul; Wikfors, Gary H

    2017-10-01

    The Penobscot River Estuary is an important system for diadromous fish in the Northeast United States of American (USA), in part because it is home to the largest remnant population of Atlantic salmon, Salmo salar, in the country. Little is known about the chemical and biological characteristics of seston in the Penobscot River Estuary. This study used estuarine transects to characterize the seston during the spring when river discharge is high and diadromous fish migration peaks in the Penobscot River Estuary. To characterize the seston, samples were taken in spring 2015 for phytoplankton identification, total suspended matter (TSM), percent organic TSM, chlorophyll a, particle size (2 μm-180 μm), particulate carbon and nitrogen concentrations, and stable carbon and nitrogen isotopes. The estuarine profiles indicate that TSM behaved non-conservatively with a net gain in the estuary. As phytoplankton constituted only 1/1000 of the particles, the non-conservative behavior of TSM observed in the estuary was most likely not attributable to phytoplankton. Particulate carbon and nitrogen ratios and stable isotope signals indicate a strong terrestrial, allochthonous signal. The seston in the Penobscot River Estuary was dominated by non-detrital particles. During a short, two-week time period, Heterosigma akashiwo, a phytoplankton species toxic to finfish, also was detected in the estuary. A limited number of fish samples, taken after the 2015 Penobscot River Estuary bloom of H. akashiwo, indicated frequent pathological gill damage. The composition of seston, along with ichthyotoxic algae, suggest the need for further research into possible effects upon resident and migratory fish in the Penobscot River Estuary. Published by Elsevier Ltd.

  2. Quaternary Slip History for the Agua Blanca Fault, northern Baja California, Mexico

    Science.gov (United States)

    Gold, P. O.; Behr, W. M.; Rockwell, T. K.; Fletcher, J. M.

    2017-12-01

    The Agua Blanca Fault (ABF) is the primary structure accommodating San Andreas-related right-lateral slip across the Peninsular Ranges of northern Baja California. Activity on this fault influences offshore faults that parallel the Pacific coast from Ensenada to Los Angeles and is a potential threat to communities in northern Mexico and southern California. We present a detailed Quaternary slip history for the ABF, including new quantitative constraints on geologic slip rates, slip-per-event, the timing of most recent earthquake, and the earthquake recurrence interval. Cosmogenic 10Be exposure dating of clasts from offset fluvial geomorphic surfaces at 2 sites located along the western, and most active, section of the ABF yield preliminary slip rate estimates of 2-4 mm/yr and 3 mm/yr since 20 ka and 2 ka, respectively. Fault zone geomorphology preserved at the younger site provides evidence for right-lateral surface displacements measuring 2.5 m in the past two ruptures. Luminescence dating of an offset alluvial fan at a third site is in progress, but is expected to yield a slip rate relevant to the past 10 kyr. Adjacent to this third site, we excavated 2 paleoseismic trenches across a sag pond formed by a right step in the fault. Preliminary radiocarbon dates indicate that the 4 surface ruptures identified in the trenches occurred in the past 6 kyr, although additional dating should clarify earthquake timing and the mid-Holocene to present earthquake recurrence interval, as well as the likely date of the most recent earthquake. Our new slip rate estimates are somewhat lower than, but comparable within error to, previous geologic estimates based on soil morphology and geodetic estimates from GPS, but the new record of surface ruptures exposed in the trenches is the most complete and comprehensively dated earthquake history yet determined for this fault. Together with new and existing mapping of tectonically generated geomorphology along the ABF, our constraints

  3. Evidence for Multiple Late Quaternary Glaciations in the Southernmost Cordillera Blanca, Peru

    Science.gov (United States)

    Smith, J. A.; Rodbell, D. T.; Ramage, J. M.

    2007-12-01

    Surface-exposure dating with in-situ-produced cosmogenic isotopes has provided the basis for a growing framework of glacial chronologies in the tropical Andes. In the Peruvian Andes, long chronologies (>400 ka) with relatively small local last glacial maximum (LLGM) advances have been reported for the central Cordillera Blanca (ca. 9°30'S) and Junin Plain (11°00'S), whereas preliminary data suggest a shorter record (<40 ka) in the intervening Cordillera Huayhuash (10°15'S). These seemingly contradictory findings raise several questions: Was the LLGM a relatively minor event in the Peruvian Andes, far exceeded by bigger, older advances? Which combination of geographic and geomorphic factors increases the likelihood that evidence of older advances will be preserved? With these questions in mind, we sought a site with both high peaks and a high-altitude plateau. The glaciated Nevado Jeulla Rajo massif (10°00'S, 77°16'W, peaks ca. 5600 masl) marks the southern end of the Cordillera Blanca and the Callejon de Huaylas valley in the central Peruvian Andes. The Conococha Plain (ca. 4050 masl) borders the western side of the massif. Large lateral moraines extend onto the Conococha Plain from the west-facing valleys and multiple moraine loops lie upvalley, closer to active ice margins. Surface-exposure dating (10Be) indicates that the largest lateral moraines from Jeullesh Valley are compound features deposited during the LLGM (ca. 30 ka) and a late-glacial readvance (ca. 16 ka). The LLGM/late-glacial moraines cross-cut an older pair of lateral moraines (ca. 70 ka) that may provide evidence for a smaller advance during marine isotope stage 4. Although the LLGM/late-glacial moraines are impressively large (ca. 150 m high), they do not represent the maximum ice extent in the region. Fluvial outwash deposits beyond the termini of the moraines on the Conococha Plain are underlain by lodgement till that is up to 20 m thick and extends ca. 6 km across the width of the Plain

  4. Downscaling reanalysis data to high-resolution variables above a glacier surface (Cordillera Blanca, Peru)

    Science.gov (United States)

    Hofer, Marlis; Mölg, Thomas; Marzeion, Ben; Kaser, Georg

    2010-05-01

    Recently initiated observation networks in the Cordillera Blanca provide temporally high-resolution, yet short-term atmospheric data. The aim of this study is to extend the existing time series into the past. We present an empirical-statistical downscaling (ESD) model that links 6-hourly NCEP/NCAR reanalysis data to the local target variables, measured at the tropical glacier Artesonraju (Northern Cordillera Blanca). The approach is particular in the context of ESD for two reasons. First, the observational time series for model calibration are short (only about two years). Second, unlike most ESD studies in climate research, we focus on variables at a high temporal resolution (i.e., six-hourly values). Our target variables are two important drivers in the surface energy balance of tropical glaciers; air temperature and specific humidity. The selection of predictor fields from the reanalysis data is based on regression analyses and climatologic considerations. The ESD modelling procedure includes combined empirical orthogonal function and multiple regression analyses. Principal component screening is based on cross-validation using the Akaike Information Criterion as model selection criterion. Double cross-validation is applied for model evaluation. Potential autocorrelation in the time series is considered by defining the block length in the resampling procedure. Apart from the selection of predictor fields, the modelling procedure is automated and does not include subjective choices. We assess the ESD model sensitivity to the predictor choice by using both single- and mixed-field predictors of the variables air temperature (1000 hPa), specific humidity (1000 hPa), and zonal wind speed (500 hPa). The chosen downscaling domain ranges from 80 to 50 degrees west and from 0 to 20 degrees south. Statistical transfer functions are derived individually for different months and times of day (month/hour-models). The forecast skill of the month/hour-models largely depends on

  5. New geologic slip rates for the Agua Blanca Fault, northern Baja California, Mexico

    Science.gov (United States)

    Gold, P. O.; Behr, W. M.; Fletcher, J. M.; Hinojosa-Corona, A.; Rockwell, T. K.

    2015-12-01

    Within the southern San Andreas transform plate boundary system, relatively little is known regarding active faulting in northern Baja California, Mexico, or offshore along the Inner Continental Borderland. The inner offshore system appears to be fed from the south by the Agua Blanca Fault (ABF), which strikes northwest across the Peninsular Ranges of northern Baja California. Therefore, the geologic slip rate for the ABF also provides a minimum slip rate estimate for the offshore system, which is connected to the north to faults in the Los Angeles region. Previous studies along the ABF determined slip rates of ~4-6 mm/yr (~10% of relative plate motion). However, these rates relied on imprecise age estimates and offset geomorphic features of a type that require these rates to be interpreted as minima, allowing for the possibility that the slip rate for the ABF may be greater. Although seismically quiescent, the surface trace of the ABF clearly reflects Holocene activity, and given its connectivity with the offshore fault system, more quantitative slip rates for the ABF are needed to better understand earthquake hazard for both US and Mexican coastal populations. Using newly acquired airborne LiDAR, we have mapped primary and secondary fault strands along the segmented western 70 km of the ABF. Minimal development has left the geomorphic record of surface slip remarkably well preserved, and we have identified abundant evidence meter to km scale right-lateral displacement, including new Late Quaternary slip rate sites. We verified potential reconstructions at each site during summer 2015 fieldwork, and selected an initial group of three high potential slip rate sites for detailed mapping and geochronologic analyses. Offset landforms, including fluvial terrace risers, alluvial fans, and incised channel fill deposits, record displacements of ~5-80 m, and based on minimal soil development, none appear older than early Holocene. To quantitatively constrain landform ages

  6. Optimizacion de una técnica para la detección de patologías virales en Pleoticus Muelleri (Bate, 1988 en el estuario de Bahía Blanca, Argentina

    Directory of Open Access Journals (Sweden)

    Ana M. Roccamo

    2010-06-01

    determine whether these viruses occur in wild populations of Pleoticus muelleri in Bahía Blanca estuary, Argentina, using biochemical, molecular biology and genetics methods. The results show that the methods used for DNA and RNA extraction and purification from the tissue and hemolymph of these crustaceans, and the techniques for their capture, packaging and transportation to the laboratory have been optimized. Tests were properly validated by negative and positive controls. None of the named diseases were found in the wild populations of Pleoticus muelleri. The methodology followed in the present research not only enables early detection and diagnosis of the three viral pathologies but also ensures an infection-free status with the concomitant health benefits for the region.

  7. Birds of Mahi River estuary, Gujarat, India

    Directory of Open Access Journals (Sweden)

    P.J. Pandya

    2010-06-01

    Full Text Available The Mahi river estuary is one of the major estuaries of Gujarat. This paper presents a comprehensive list of birds of the Mahi river estuary (nearly 50 km stretch and the adjacent banks/ravines and defines the avian diversity at three major estuarine gradations with a brief check of similarity and diversity within the three. The present observation is the outcome of a 3 year period from August 2006 to July 2009. A sum total of 118 species belonging to 42 families were reported and listed as on Upstream, Midstream, and Downstream of estuary. No significant difference was seen in the species richness at the three zones; a change in avian composition at upstream and downstream was notable.

  8. Climate Ready Estuaries Partner Projects Map

    Science.gov (United States)

    CRE partners with the National Estuary Program to develop climate change projects in coastal U.S. areas, such as bays and harbors; to develop adaptation action plans, identify climate impacts and indicators, and more. This map shows project locations.

  9. National Estuary Program Study Area Boundaries

    Data.gov (United States)

    U.S. Environmental Protection Agency — There are 28 National Estuary Programs (NEPs) in the U.S.that implement habitat protection and restoration projects with their partners. This work takes place within...

  10. Mercury enrichment in sediments of Amba estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Ram, A.; Rokade, M.A.; Zingde, M.D.

    of anthropogenic metal to the estuary. Geoaccumulation index and enrichment factor support Hg contamination of the estuarine sediment to a varying degree. Hg is not significantly correlated with TOC, Al, Fe and Mn in these sediments...

  11. Heavy metals in Mindhola river estuary, India

    Digital Repository Service at National Institute of Oceanography (India)

    Zingde, M.D.; Rokade, M.A; Mandalia, A

    The heavy metal concentrations are studied along the Mindhola river estuary. Surface and bottom water samples were collected using Niskin Sampler. The sediment samples were collected using a Van Veen grab. The heavy metal concentration is estimated...

  12. Mercury in sediments of Ulhas estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Ram, A.; Rokade, M.A.; Borole, D.V.; Zingde, M.D.

    Hg levels in water, suspended particulate matter and sediment of the Ulhas estuary are under considerable environmental stress due to the indiscriminate release of effluents from a variety of industries including chlor-alkali plants. Concentration...

  13. Benthic studies in south Gujarat estuaries

    Digital Repository Service at National Institute of Oceanography (India)

    Govindan, K.; Varshney, P.K.; Desai, B.N.

    Benthic biomass and faunal composition in relation to various environmental conditions of the four South Gujarat estuaries namely the Auranga, Ambika, Purna and Mindola were studied and compared. Mean population density of benthos in Auranga, Ambika...

  14. Estuaries.

    Science.gov (United States)

    Awkerman, Gary L.

    This publication is designed for use in standard science curricula to develop oceanologic manifestations of certain science topics. Included are teacher guides, student activities, and demonstrations designed to impart ocean understanding to high school students. When the student has completed this unit, he should be able to: (1) define an…

  15. Keurbooms Estuary floods and sedimentation

    Directory of Open Access Journals (Sweden)

    Eckart H. Schumann

    2015-11-01

    Full Text Available The Keurbooms Estuary at Plettenberg Bay lies on a wave-dominated, microtidal coast. It has a dune-topped sandy barrier, or barrier dune, almost 4 km long, with a narrow back-barrier lagoon connected to its source rivers, the Keurbooms and Bitou. The estuary exits to the sea through this barrier dune, and it is the geomorphology and mouth position in relation to floods, which is the subject of this paper. Measurements of rainfall, water level, waves and high- and low-tide water lines were used to analyse the mouth variability over the years 2006–2012. Two major floods occurred during this time, with the first in November 2007 eroding away more than 500 000 m3 of sediment. The new mouth was established at the Lookout Rocks limit – the first time since 1915. The second flood occurred in July 2012 and opened up a new mouth about 1 km to the north-east; high waves also affected the position of the breach. The mouth has a tendency to migrate southwards against the longshore drift, but at any stage this movement can be augmented or reversed. The effectiveness of floods in breaching a new mouth through the barrier dune depends on the flood size and the nature of the exit channel in the back-barrier lagoon. Other factors such as ocean waves, sea level, vegetative state of the dune and duration of the flood are also important and can determine where the breach occurs, and if the new mouth will dominate the old mouth.

  16. Bar dimensions and bar shapes in estuaries

    Science.gov (United States)

    Leuven, Jasper; Kleinhans, Maarten; Weisscher, Steven; van der Vegt, Maarten

    2016-04-01

    Estuaries cause fascinating patterns of dynamic channels and shoals. Intertidal sandbars are valuable habitats, whilst channels provide access to harbors. We still lack a full explanation and classification scheme for the shapes and dimensions of bar patterns in natural estuaries, in contrast with bars in rivers. Analytical physics-based models suggest that bar length in estuaries increases with flow velocity, tidal excursion length or estuary width, depending on which model. However, these hypotheses were never validated for lack of data and experiments. We present a large dataset and determine the controls on bar shape and dimensions in estuaries, spanning bar lengths from centimeters (experiments) to 10s of kilometers length. First, we visually identified and classified 190 bars, measured their dimensions (width, length, height) and local braiding index. Data on estuarine geometry and tidal characteristics were obtained from governmental databases and literature on case studies. We found that many complex bars can be seen as simple elongated bars partly cut by mutually evasive ebb- and flood-dominated channels. Data analysis shows that bar dimensions scale with estuary dimensions, in particular estuary width. Breaking up the complex bars in simple bars greatly reduced scatter. Analytical bar theory overpredicts bar dimensions by an order of magnitude in case of small estuarine systems. Likewise, braiding index depends on local width-to-depth ratio, as was previously found for river systems. Our results suggest that estuary dimensions determine the order of magnitude of bar dimensions, while tidal characteristics modify this. We will continue to model bars numerically and experimentally. Our dataset on tidal bars enables future studies on the sedimentary architecture of geologically complex tidal deposits and enables studying effects of man-induced perturbations such as dredging and dumping on bar and channel patterns and habitats.

  17. PHASE ANALYSES OF URANIUM BEARING MINERALS FROM THE HIGH GRADE ORE, NOPAL I, PENA BLANCA, MEXICO

    International Nuclear Information System (INIS)

    Ren, M.; Goodell, P.; Kelts, A.; Anthony, E.Y.; Fayek, M.; Fan, C.; Beshears, C.

    2005-01-01

    The Nopal I uranium deposit is located in the Pena Blanca district, approximately 40 miles north of Chihuahua City, Mexico. The deposit was formed by hydrothermal processes within the fracture zone of welded silicic volcanic tuff. The ages of volcanic formations are between 35 to 44 m.y. and there was secondary silicification of most of the formations. After the formation of at least part of the uranium deposit, the ore body was uplifted above the water table and is presently exposed at the surface. Detailed petrographic characterization, electron microprobe backscatter electron (BSE) imagery, and selected x-ray maps for the samples from Nopal I high-grade ore document different uranium phases in the ore. There are at least two stages of uranium precipitation. A small amount of uraninite is encapsulated in silica. Hexavalent uranium may also have been a primary precipitant. The uranium phases were precipitated along cleavages of feldspars, and along fractures in the tuff. Energy dispersive spectrometer data and x-ray maps suggest that the major uranium phases are uranophane and weeksite. Substitutions of Ca and K occur in both phases, implying that conditions were variable during the mineralization/alteration process, and that compositions of the original minerals have a major influence on later stage alteration. Continued study is needed to fully characterize uranium behavior in these semi-arid to arid conditions

  18. Uranium deposits associated to tertiary acid volcanism of the Pena Blanca Sierra (Chihuahua, Mexico)

    International Nuclear Information System (INIS)

    Aniel, B.

    1986-12-01

    The uraniferous deposits located in the Sierra de Pena Blanca (Chihuahua, Mexico) are the consequence of successive events that modified acid volcanic rocks. The devitrification of the Nopal Formation, vitroclastic tuffs, is esential in the cooling history because it releases uranium that becomes available. The uranium present in fluids as uranylcarbonate complexes, precipitate along the lamellea of hematite (exsolutions of the ilmenites). The presence of sulfur causes the destabilization of the ilmenites with uranium oxide (pitchblende - titanium oxide - pyrite), the pseudomorph of magnetites (pitchblende - pyrite) and the transformation of hematite into pyrite. The silice coming from the kaolinization of feldspars recristallizes as microcristalline quartz so that the rock appears compact. Fractures cause the uplifting of the lower unit of Nopal formation. It has been altered to montmorillonite. A carbonatation of this tuff has been observed and these two types of alteration occur after kaolinization. The Escuadra formation overlies the Nopal formation. The deposition takes place on an eroded basement where a soil developed. The two formations will together undergo transformations due to the saturation level and the primary ore will be only oxidized or oxidized, transported and reconcentrated. Late and localized thermal activities have been observed and may be the result of tectonic movements occurring after the supergene modification [fr

  19. Estudio farmacognóstico de ocimum basilicum l. (albahaca blanca

    Directory of Open Access Journals (Sweden)

    Ester Sánchez Govín

    2000-12-01

    Full Text Available Ocimum basilicum L. (albahaca blanca es una de las plantas aromáticas que se clasifican por la composición química de su aceite. Se investigó la variedad lactucaefolium que posee propiedades antisépticas, antiinflamatorias y antiespasmódicas. Se determinaron los índices numéricos en esta especie y se estandarizó el perfil cromatográfico a partir de su aceite esencial. El estudio de conservación muestra que el tiempo óptimo de almacenamiento en frasco de vidrio y sobres de polietileno es de 10 meses.Ocimum basilicum L. (white sweet basil is one of the aromatic plants that is classified according to the chemical composition of its oil. The lactucaefolium variety that has antiseptic, antiinflammatory and antispasmodic properties was investigated. The numerical indexes were determined in this species and the chromatographic profile was standardized starting from its essential oil. The conservation study shows that the optimum time of storage in glass flasks and polyethylene bags is of l0 months.

  20. CASOS SELECTOS DE RESISTENCIA A INSECTICIDAS EN MOSCAS BLANCAS (Hemiptera: Aleyrodidae EN EL MUNDO

    Directory of Open Access Journals (Sweden)

    Macías-flores A

    2013-01-01

    Full Text Available Las moscas blancas (Hemíptera: Aleyrodidae son un problema a escala global. En México, llamó la atención como plaga agrícola en la década de los años 80´s y 90´s del siglo pasado por las pérdidas económicas que ocasionaron en los cultivos agrícolas, debido a los daños directos por la succión de savia y a los daños indirectos por la transmisión de enfermedades de origen viral. El hombre en su intento fallido por erradicarlas ha hecho uso desmedido de insecticidas químicos, quizás por su accesibilidad por costo bajo o por efectos de control inmediatos, por lo cual ha causado daño al medio ambiente y a la salud humana, con la consecuencia de desarrollo de resistencia. En un intento por disminuir los efectos de tales sustancias, muchas investigaciones alrededor del mundo se han conducido para encontrar productos insecticidas más efectivos con el menor impacto ambiental y a la salud humana, y que contribuyan a incrementar las herramientas de control disponibles en los sistemas de producción agrícola.

  1. The Estuary Book: A Guide to Promoting Understanding and Regional Management of Maine's Estuaries and Embayments.

    Science.gov (United States)

    Ruffing, Jenny

    The objective of this document is to provide information about estuaries, the impact of uses on the environmental health of an estuary, and what communities and concerned individuals can do to manage and protect their local estuarine resources successfully. Much of the information presented here pertains to other embayments along the Maine coast…

  2. Seasonal stratification and property distributions in a tropical estuary (Cochin estuary, west coast, India)

    Digital Repository Service at National Institute of Oceanography (India)

    Shivaprasad, A.; Vinita, J.; Revichandran, C.; Reny, P.D.; Deepak, M.P.; Muraleedharan, K.R.; NaveenKumar, K.R.

    immune from extended hypoxia/anoxia and maintaining the health of the Cochin estuary. For the seasonally varying river flow in the estuary, salt intrusion receded with increasing river flow in monsoon and rebounded with decreasing river flow in dry season...

  3. Habits and customs of crab catchers in southern Bahia, Brazil.

    Science.gov (United States)

    Firmo, Angélica M S; Tognella, Mônica M P; Tenório, Gabrielle D; Barboza, Raynner R D; Alves, Rômulo R N

    2017-08-23

    Brazilian mangrove forests are widely distributed along the coast and exploited by groups of people with customs and habits as diverse as the biology of the mangrove ecosystems. This study identifies different methods of extracting crabs that inhabit the mangrove belts; some of these activities, such as catching individual crabs by hand, are aimed at maintaining natural stocks of this species in Mucuri (south Bahia), Brazil. In the studied community, illegal hunting activities that violate Brazilian legislation limiting the use of tangle-netting in mangrove ecosystem were observed. According to our observations, fishermen, to catch individual crabs, use the tangle-netting technique seeking to increase income and are from families that have no tradition of extraction. This analysis leads us to conclude that catchers from economically marginalised social groups enter mangroves for purposes of survival rather than for purposes of subsistence, because the catching by tangle-netting is a predatory technique. Tangle-netting  technique increase caught but also increases their mortality rate. We emphasise that traditional catching methods are unique to Brazil and that manual capturing of crab should be preserved through public policies aimed at maintaining the crab population.

  4. Perkinsus beihaiensis (Perkinsozoa in oysters of Bahia State, Brazil

    Directory of Open Access Journals (Sweden)

    M. S. A. Luz

    2017-08-01

    Full Text Available Abstract This study reports the pathogen Perkinsus beihaiensis in oysters of the genus Crassostrea on the coast of the State of Bahia (Brazil, its prevalence, infection intensity and correlation with salinity. Oysters (n = 240 were collected between October and December 2014 at eight sampling stations between latitudes 13°55'S and 15°42'S. The laboratory procedures included macroscopic analysis, histology, culture in Ray's fluid thioglycollate medium (RFTM, Polymerase Chain Reaction (PCR and DNA sequencing. PCR and sequencing have been used for the genetic identification of oysters as well. Two species of oysters have been identified: Crassostrea rhizophorae and C. brasiliana. In both oyster species P. beihaiensis was the only Perkinsus species detected. In C. rhizophorae, the average prevalence was 82.8% by histology and 65.2% by RFTM. In C. brasiliana, the prevalences were 70.5% and 35.7%, respectively. The higher prevalence of P. beihaiensis in C. rhizophorae was probably influenced by salinity, with which was positively correlated (r> 0.8. In both oysters, P. beihaiensis was located mainly in the gastric epithelium. The infection was generally mild or moderate, without apparent harm to the hosts, but in cases of severe infection, there was hemocytical reaction and tissue disorganization. The generally high prevalence in the region suggests that oysters should be monitored with respect to this pathogen, especially in growing areas.

  5. Three new species of Begonia (Begoniaceae) from Bahia, Brazil.

    Science.gov (United States)

    Gregório, Bernarda de Souza; Costa, Jorge Antonio Silva; Rapini, Alessandro

    2015-01-01

    The taxonomic treatment of Begoniaceae for the state of Bahia, Brazil, led to the recognition of three new species of Begonia with narrow distributions, which are described and illustrated here: Begoniadelicata Gregório & J.A.S. Costa, sp. nov. is a herb restricted to the region of the Recôncavo; Begoniaelianeae Gregório & J.A.S. Costa, sp. nov. is a shrub endemic to the Atlantic forest of the southern part of the state; and Begoniapaganuccii Gregório & J.A.S. Costa, sp. nov. is a subshrub known only from the type material, collected in the Piedmont of Paraguaçu. Notes on morphology, comparisons with morphologically similar species, etymology, geographic distribution, habitat and phenological data for each species are also presented. Furthermore, keys are provided as an aid to separating the new species from congeneric species that occur in their surroundings. Due to the sparse knowledge of the new species, there is as yet insufficient data to accurately assess their conservation status.

  6. Hemoglobinopathies in newborns from Salvador, Bahia, Northeast Brazil

    Directory of Open Access Journals (Sweden)

    Adorno Elisângela Vitória

    2005-01-01

    Full Text Available Hemoglobinopathies are hereditary disorders of the hemoglobin molecule with a high prevalence worldwide. Brazil has a prevalence of 0.1 to 0.3% of newborns with sickle cell anemia and 20.0 to 25.0% of heterozygous alpha2 thalassemia among African Brazilians. In the present study, we investigated the presence of variant hemoglobins and alpha2(3.7 Kb and alpha2(4.2 Kb thalassemia in newborns from Salvador, Bahia, Brazil. Samples of umbilical cord blood from a total of 590 newborns were analyzed, of which 57 (9.8% were FAS; 36 (6.5% FAC; one (0.2% SF; and five (0.9% FSC. One hundred fourteen (22.2% newborns had alpha2(3.7 Kb thalassemia, of whom 101 (19.7% were heterozygous and 13 (2.5% homozygous, showing statistical significance for hematological data between newborns with normal alpha genes and alpha2(3.7 Kb thalassemia carriers. The alpha2(4.2 Kb thalassemia was not found. Frequencies found in the present study confirm that hemoglobinopathies are a public health problem in Brazil, emphasizing the need for neonatal screening and genetic counseling programs.

  7. Metamorphism, metasomatism and mineralization at Lagoa Real, Bahia, Brazil

    International Nuclear Information System (INIS)

    Lobato, L.M.

    1985-09-01

    Uranium deposits cumulatively in the 100,000 tonne U 3 O 8 range occur within ductile shear zones transecting Archean basement gneisses of the Sao Francisco Craton, at the Lagoa Real region of south-central Bahia, Brasil. The gneisses, dated at 2.6-3.0Ga, are at amphibolite and granulite facies and overlie to the west, the Proterozoic Espinhaco metasedimentary sequence along a thrust fault. Petrography and mineral chemistry show that in the zones of alteration/mineralization, the original K-feldspar + quartz + albite/oligoclase + hastingsite assemblage, is replaced by albite + aegirine - angite + andradite + hematite assemblages, with or without uraninite. This information along with oxygen isotope, whole rock geochemistry and fluid inclusion studies indicate that the alteration process involves removal of Si, K, Rb, Ba and addition of Na under oxidizing conditions. V, Pb and Sr were introduced along with U via interaction with saline SO 2 - rich, isotopically light fluids under varying water/rock ratios and at temperatures of 500 - 550 0 C. 87 Sr/ 86 Sr systematics suggest that it is unlikely that Sr, and by extension uranium, were introduced by fluids originating from the basement gneisses. Geological constraints and the general alteration pattern are consistent with the release of the mineralizing fluids in response to the overloading of the basement rocks onto the Sedimentary Espinhaco via a thrust mechanism. (Author) [pt

  8. Effects of soil microorganisms on uptake of 89Sr by ryegrass and bahia grass

    International Nuclear Information System (INIS)

    Zhong Weiliang; Liu Kexing

    2006-01-01

    In present study, 60 Co γ-rays was used to irradiate soil with doses of 3.0 kGy and 25.0 kGy, respectively, to discriminate between arbuscular mycorrhizal (AM) fungi and other soil microorganisms, while soil without irradiation was used as control to study the effects of soil microorganisms on uptake of 89 Sr by ryegrass and bahia grass. The results showed that the AM infection rates in ryegrass and bahia grass were 48.0% and 28.0% in the control soil, respectively which indicated that both grass species were prone to forming AM symbiosis with AM fungi. Although AM fungi and other soil microorganisms had no significant effect on above ground biomass in ryegrass and bahia grass, both AM fungi and other soil microorganisms decreased the uptake of 89 Sr in the two grass species, though to a more or less extant. (authors)

  9. Total petroleum hydrocarbons and trace metals in tropical estuary of Todos os Santos Bay, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Celino, Joil Jose; Oliveira, Olivia Maria Cordeiro de; Queiroz, Antonio Fernando de Souza [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil); Trigueis, Jorge Alberto [Universidade Estadual do Norte Fluminense (UENF), Campos dos Goytacazes, RJ (Brazil); Garcia, Karina Santos [Universidade Federal Fluminense (UFF), Niteroi, RJ (Brazil)

    2008-07-01

    As part of the environmental assessment within Todos os Santos Bay, State of Bahia - Brazil, in summer of 2005, superficial water and sediments samples of the mangrove were collected at five locations to determine the spatial distribution of anthropogenic pollutants in the Dom Joao estuary at the Sao Francisco do Conde Region. Sandy sediments with low organic matter content dominate the studied area. Trace metal levels indicated that sediments were moderately polluted with Cu (overall mean: 21.48 +/- 4.76 {mu}g.g-1 dry sediment), but not with Pb (15 +/- 8), Zn (38 +/- 10), Cr (15 +/- 7), Ni (13 +/- 6) and Cd (0.4 +/- 0.2). Depending on location, total petroleum hydrocarbons ranged from 1.6 to 10.6 {mu}g.g-1. To discriminate pattern differences and similarities among samples, principal component analysis (PCA) was performed using a correlation matrix. PCA revealed the latent relationships among all the stations investigated and confirmed our analytical results. Principal components analysis confirmed two regions according to their environmental quality. The results pointed out that almost all the area presented some substances that can cause adverse biological effects, especially in the outermost region where some metals are above TEL level. (author)

  10. Behaviour of Sotalia guianensis (van Bénéden, 1864 (Cetacea, Delphinidae and ethnoecological knowledge of artisanal fishermen from Canavieiras, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Costa Martha Eloy

    2012-05-01

    Full Text Available Abstract Artisanal fishermen, because of their direct and frequent contact with the aquatic environment, possess a wealth of knowledge about the natural history of the fauna of the region in which they live. This knowledge, both practical and theoretical, has been frequently utilized and integrated into academic research. Taking this into consideration, this study discusses the ethnoecological knowledge of artisanal fishermen from a community in Canavieiras, state of Bahia, Brazil regarding the Guiana dolphin (Sotalia guianensis, a typically costal member of the family Delphinidae that is little studied in this region. To this end, the behaviour of S. guianensis in Canavieiras was recorded over one year and the data obtained were compared with fishermen’s reports. A total of 609 hours of behavioural observations of S. guianensis was conducted from a fixed point in alternate morning and afternoon sessions between October 2009 and September 2010. Observations were conducted from a pier (15°40’59”S and 38°56’38”W situated on the banks of the Pardo River estuary - the region’s main river - at 5.5 m above water level. For ethnoecological data collection, semi-structured interviews were carried out with 26 fishermen in May, June and September 2010 and January 2011 in the fishing community of Atalaia. Occasional boat expeditions were made with the fishermen to compare their reports with direct observations of the behaviour of S. guianensis. The results demonstrate that fishermen possess a body of knowledge about S. guianensis that describes in detail the main behavioural aspects of the species. They reported the presence of S. guianensis in the Pardo River estuary throughout the year and its gregarious behaviour. They cited a relationship between the movement of dolphins and tidal cycles, and their presence in the estuary associated with the search for food. In addition, the fishermen reported that numbers of infants in groups were

  11. ANÁLISE OPERACIONAL DA COLHEITA FLORESTAL NO SUL DA BAHIA

    OpenAIRE

    CARMO, F. C. A.

    2013-01-01

    CARMO, Flávio Cipriano de Assis. Análise operacional da colheita florestal no sul da Bahia. 2013. Dissertação (Mestrado em Ciências Florestais) Universidade Federal do Espírito Santo, Jerônimo Monteiro-ES. Orientador: Prof. Dr. Nilton César Fiedler. Coorientador: Profª. Drª. Elizabeth Neire da Silva Oliveira de Paula. Objetivou-se com esta pesquisa realizar uma análise operacional das atividades de colheita florestal em plantios de eucalipto no sul da Bahia. No estudo foram avaliados os ...

  12. Towards the classification of eutrophic condition in estuaries

    CSIR Research Space (South Africa)

    Lemley, DA

    2015-10-01

    Full Text Available Water quality and ecological integrity of estuaries closely reflect activities within the entire upstream catchment. Much emphasis has been placed on the response of estuaries to anthropogenic stressors through the use of monitoring programmes. Key...

  13. Pollution induced tidal variability in water quality of Mahim Estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Zingde, M.D.; Sabnis, M.M.

    Variability of water quality due to release of wastewater in Mahim Estuary (Maharashtra, India) and associated nearshore waters is discussed. The mixing of low salinity contaminated estuary water with high salinity bay water was considerably...

  14. Benthos of Beypore and Korapuzha estuaries of North Kerala

    Digital Repository Service at National Institute of Oceanography (India)

    Devi, K.S.; Sankaranarayanan, V.N.; Venugopal, P.

    The benthos from Beypore and Korapuzha estuaries were studied for one year. Environmental features, sediment characteristics and organic carbon content were estimated. Benthic density was high during monsoon and postmonsoon in both the estuaries...

  15. Variations of dissolved oxygen in Mandovi and Zuari estuaries

    Digital Repository Service at National Institute of Oceanography (India)

    DeSousa, S.N.; SenGupta, R.

    During non-monsoon months the estuaries were well mixed showing uniform oxygen concentrations from surface to bottom. However, during monsoon months both the estuaries showed stratified conditions with surface water showing high oxygen concentration...

  16. Nutrient characterisation of river inflow into the estuaries of the ...

    African Journals Online (AJOL)

    Nutrient characterisation of river inflow into the estuaries of the Gouritz Water ... into the estuaries within the Gouritz Water Management Area (WMA) of South Africa. ... Long-term water quality monitoring data (dissolved inorganic nitrogen, i.e. ...

  17. Skagit IMW - Skagit River Estuary Intensively Monitored Watershed Project

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — This study evaluates system-level effects of several estuary restoration projects on juvenile Chinook salmon production in the Skagit River estuary. The monitoring...

  18. Epithermal uranium deposits in a volcanogenic context: the example of Nopal 1 deposit, Sierra de Pena Blanca, Mexico

    Science.gov (United States)

    Calas, G.; Angiboust, S.; Fayek, M.; Camacho, A.; Allard, T.; Agrinier, P.

    2009-12-01

    The Peña Blanca molybdenum-uranium field (Chihuahua, Mexico) exhibits over 100 airborne anomalies hosted in tertiary ignimbritic ash-flow tuffs (44 Ma) overlying the Pozos conglomerate and a sequence of Cretaceous carbonate rocks. Uranium occurrences are associated with breccia zones at the intersection of two or more fault systems. Periodic reactivation of these structures associated with Basin and Range and Rio Grande tectonic events resulted in the mobilization of U and other elements by meteoric fluids heated by geothermal activity. Trace element geochemistry (U, Th, REE) provides evidence for local mobilization of uranium under oxidizing conditions. In addition, O- and H-isotope geochemistry of kaolinite, smectite, opal and calcite suggests that argillic alteration proceeded at shallow depth with meteoric water at 25-75 °C. Focussed along breccia zones, fluids precipitated several generations of pyrite and uraninite together with kaolinite, as in the Nopal 1 mine, indicating that mineralization and hydrothermal alteration of volcanic tuffs are contemporaneous. Low δ34S values (~ -24.5 ‰) of pyrites intimately associated with uraninite suggest that the reducing conditions at the origin of the U-mineralization arise from biological activity. Later, the uplift of Sierra Pena Blanca resulted in oxidation and remobilization of uranium, as confirmed by the spatial distribution of radiation-induced defect centers in kaolinites. These data show that tectonism and biogenic reducing conditions can play a major role in the formation and remobilization of uranium in epithermal deposits. By comparison with the other uranium deposits at Sierra Pena Blanca and nearby Sierra de Gomez, Nopal 1 deposit is one of the few deposits having retained a reduced uranium mineralization.

  19. Reinterpretation of the formation of the "crooked moraine" of the debris-covered Hatunraju Glacier (Cordillera Blanca, Perú)

    Science.gov (United States)

    Iturrizaga, L.

    2012-04-01

    The Hatunraju Glacier (9°00'S/70°40'W) is located in the Parón valley in the northern part of the Cordillera Blanca. The almost 4 km long and steeply inclined glacier flows down from the Huandoy-N-Side (6395 m) into the Parón valley to an elevation of 4250 m a.s.l.. The extremely narrow glacier is in its entire ablation area heavily debris-covered. It is one of the few glaciers, which dam with its debris-mantled glacier tongue a main river in this mountain range. In this case the Hatunraju glacier produces the largest glacier-dammed lake in the Cordillera Blanca, the Laguna Parón. In some other aspects, this glacier proves to be distinct from the majority of the glaciers in the Cordillera Blanca: It is flowing on an almost up to 250 m high moraine pedestal ("moraine-dammed raised bed glacier") and the glacier makes a bend of almost 90° when entering into the main valley. The present paper focuses in particular on the last point: the formation of the so called "crooked moraine". It has been explained by Lliboutry (1977) as a result of a glacier lake outburst and the subsequent destruction of the latero-frontal moraine. The later process supposed to be the trigger of the abrupt change in the flow direction of the lower part of the glacier. Recent investigations suggest an alternative genesis of the crooked moraine considering the distinct phases of the glaciation history of the Parón valley. The here proposed formation pattern is also paradigmatic for other crooked debris-covered glaciers, especially in High Asia. Comparative examples will be provided from the Karakoram and Himalayas. The research work on the Hatunraju Glacier is part of a project on the glacial geomorphology in the Tropical Andes financed by the Alexander von Humboldt-Foundation.

  20. Origin and composition of particulate organic matter in a macrotidal turbid estuary: The Gironde Estuary, France

    Science.gov (United States)

    Savoye, Nicolas; David, Valérie; Morisseau, François; Etcheber, Henri; Abril, Gwenaël; Billy, Isabelle; Charlier, Karine; Oggian, Georges; Derriennic, Hervé; Sautour, Benoît

    2012-08-01

    At the interface between continent and ocean, estuaries receive particles, and especially particulate organic matter (POM) originating from these two reservoirs, but also produce POM, through autochthonous primary production. The origin and composition of surface POM in the Gironde Estuary (SW France) and the environmental forcing of its variability was investigated using the data set produced by the French Coastal Monitoring Network SOMLIT (Service d'Observation en Milieu LITtoral; monthly like sampling during years 2007-2009). This estuary is considered as a model of macrotidal turbid estuaries. Using elemental and isotopic composition of the POM, we estimated that, at the inner estuary space scale and inter-annual time scale, surface particulate organic carbon (POC) was composed of terrestrial POM originated from the turbidity maximum (96.4%; refractory POC) and flood events (1.6%; labile and refractory POC), and of riverine (0.1%), estuarine (0.8%) and marine (1.1%) phytoplankton, i.e. that POC was 98% and 2% of terrestrial and phytoplankton origin, respectively. However, there was a clear spatial gradient: the phytoplankton contribution increases from ca. 1% in the upper and middle estuary to 8.5% in the lower estuary, where light condition is more favourable to plankton growth. The low contribution of phytoplankton to the POC is a characteristic of the Gironde estuary and contrast with other large temperate estuaries. Statistical analysis indicates that salinity, river flow and SPM concentration, and thus associated hydro-dynamic and sedimentary processes, were the only environmental forcings to the composition of surface POC in this system, at intra- and inter-annual time scale. In contrast, temperature and nutrient concentrations, and thus associated processes, do not force this composition of POC. By combining POC fluxes entering the inner estuary (literature data), POC loss as dissolved organic carbon and CO2 and as sediment trapping within the inner

  1. El proceso de institucionalización de la música en Bahía Blanca : Una propuesta teórico-metodológica

    OpenAIRE

    Caubet, María Noelia

    2016-01-01

    La formación obtenida en el Conservatorio de Música y el cursado simultáneo del Profesorado y la Licenciatura en Historia en la Universidad Nacional del Sur, me generaron diversas inquietudes acerca de los procesos de conformación de los organismos de enseñanza e interpretación musical en Bahía Blanca, un tema poco explorado por la historiografía local. La tesina Músicos en Red. La creación del Conservatorio Provincial de Música en el proceso de institucionalización cultural de Bahía Blanca (...

  2. Proyecto de producción y comercialización de compota de zanahoria blanca en la ciudad de Guayaquil

    OpenAIRE

    Cedeño Cáceres, Karla Paola; Quimí Lino, Manuel Enrique; Rivera Flores, Stalin

    2013-01-01

    El proyecto a emprender se encuentra enfocado en la elaboración y producción de la compota de zanahoria blanca en la ciudad de Guayaquil, teniendo como materia prima la zanahoria blanca, que con sus propiedades nutritivas aún desconocida por muchos, esta cuenta con un gran valor nutricional el cual con nuestro proyecto pretendemos dar a conocer, de modo que podemos aprovechar la ventaja de que aún no existe en el mercado un producto con estas características. Este sería un prod...

  3. Stratigraphy of the PB-1 well, Nopal I uranium deposit, Sierra Pena Blanca, Chihuahua, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Dobson, P.; Fayek, M.; Goodell, P.; Ghezzehei, T.; Melchor, F.; Murrell, M.; Oliver, R.; Reyes-Cortes, I.A.; de la Garza, R.; Simmons, A.

    2008-08-01

    The Nopal I site in the Pena Blanca uranium district has a number of geologic and hydrologic similarities to the proposed high-level radioactive waste repository at Yucca Mountain, making it a useful analogue to evaluate process models for radionuclide transport. The PB-1 well was drilled in 2003 at the Nopal I uranium deposit as part of a DOE-sponsored natural analogue study to constrain processes affecting radionuclide transport. The well penetrates through the Tertiary volcanic section down to Cretaceous limestone and intersects the regional aquifer system. The well, drilled along the margin of the Nopal I ore body, was continuously cored to a depth of 250 m, thus providing an opportunity to document the local stratigraphy. Detailed observations of these units were afforded through petrographic description and rock-property measurements of the core, together with geophysical logs of the well. The uppermost unit encountered in the PB-1 well is the Nopal Formation, a densely welded, crystal-rich, rhyolitic ash-flow tuff. This cored section is highly altered and devitrified, with kaolinite, quartz, chlorite, and montmorillonite replacing feldspars and much of the groundmass. Breccia zones within the tuff contain fracture fillings of hematite, limonite, goethite, jarosite, and opal. A zone of intense clay alteration encountered in the depth interval 17.45-22.30 m was interpreted to represent the basal vitrophyre of this unit. Underlying the Nopal Formation is the Coloradas Formation, which consists of a welded lithic-rich rhyolitic ash-flow tuff. The cored section of this unit has undergone devitrification and oxidation, and has a similar alteration mineralogy to that observed in the Nopal tuff. A sharp contact between the Coloradas tuff and the underlying Pozos Formation was observed at a depth of 136.38 m. The Pozos Formation consists of poorly sorted conglomerate containing clasts of subangular to subrounded fragments of volcanic rocks, limestone, and chert

  4. Stratigraphy of the PB-1 well, Nopal I uranium deposit, Sierra Pena Blanca, Chihuahua, Mexico

    International Nuclear Information System (INIS)

    Dobson, P.; Fayek, M.; Goodell, P.; Ghezzehei, T.; Melchor, F.; Murrell, M.; Oliver, R.; Reyes-Cortes, I.A.; de la Garza, R.; Simmons, A.

    2008-01-01

    The Nopal I site in the Pena Blanca uranium district has a number of geologic and hydrologic similarities to the proposed high-level radioactive waste repository at Yucca Mountain, making it a useful analogue to evaluate process models for radionuclide transport. The PB-1 well was drilled in 2003 at the Nopal I uranium deposit as part of a DOE-sponsored natural analogue study to constrain processes affecting radionuclide transport. The well penetrates through the Tertiary volcanic section down to Cretaceous limestone and intersects the regional aquifer system. The well, drilled along the margin of the Nopal I ore body, was continuously cored to a depth of 250 m, thus providing an opportunity to document the local stratigraphy. Detailed observations of these units were afforded through petrographic description and rock-property measurements of the core, together with geophysical logs of the well. The uppermost unit encountered in the PB-1 well is the Nopal Formation, a densely welded, crystal-rich, rhyolitic ash-flow tuff. This cored section is highly altered and devitrified, with kaolinite, quartz, chlorite, and montmorillonite replacing feldspars and much of the groundmass. Breccia zones within the tuff contain fracture fillings of hematite, limonite, goethite, jarosite, and opal. A zone of intense clay alteration encountered in the depth interval 17.45-22.30 m was interpreted to represent the basal vitrophyre of this unit. Underlying the Nopal Formation is the Coloradas Formation, which consists of a welded lithic-rich rhyolitic ash-flow tuff. The cored section of this unit has undergone devitrification and oxidation, and has a similar alteration mineralogy to that observed in the Nopal tuff. A sharp contact between the Coloradas tuff and the underlying Pozos Formation was observed at a depth of 136.38 m. The Pozos Formation consists of poorly sorted conglomerate containing clasts of subangular to subrounded fragments of volcanic rocks, limestone, and chert

  5. Proglacial hydrology in the tropical Andes: lessons from the Cordillera Blanca, Peru (Invited)

    Science.gov (United States)

    McKenzie, J. M.; Mark, B. G.; Baraer, M.

    2009-12-01

    Understanding the complexities of tropical Andean hydrology is critical for managing modern water resources and interpreting paleohydrologic records. Glaciers are the most visible component of these systems, responding to global climate change and acting as critical hydrologic reservoirs. Tropical Andean glaciers are undergoing rapid retreat with complex impacts on the downstream hydrology. Groundwater is also an important component of the Andean regional hydrologic system, but its contribution is difficult to assess due to remote site access, minimal baseline data, and lack of continuous historical discharge and precipitation measurements. We have synthesized hydrochemical data from synoptically sampled glacial melt water, groundwater, precipitation, and stream discharge collected intermittently between 1998 and July 2008 throughout the Callejon de Huaylas, a 5000 km2 watershed that drains the western side of the Cordillera Blanca in northern Perú. Our data from 2004 to 2006 show systematic annual shifts in the isotopic ratios (δ18O and δ2H) of river water, indicating an increase in glacial melt water input, and we are able to use these changes across the Cordillera Blanca to estimate an average increase of 1.6 (± 1.1) % in the specific discharge of the glacierized basins. Enhanced total stream discharge in more glacierized catchments (>20% glacier area) is demonstrated by a significant positive trend in a 43-year discharge anomaly record. Our hydrochemical basin characterization method (HBCM) uses chemical mass balance mixing to quantify the contribution of glacial melt water, groundwater, and surface runoff to streams for different valleys and nested watersheds in the Callejon de Huaylas. The Yanamarey basin (7% glaciated) has been observed since 1998 and the HBCM results show good agreement with measured stream discharge (maximum R2 of 0.99) for monthly cumulative values. These results suggest that for most of the studied years groundwater is the main

  6. Mapping Glacier Dynamics and Proglacial Wetlands with a Multispectral UAV at 5000m in the Cordillera Blanca, Peru

    Science.gov (United States)

    Wigmore, O.; Mark, B. G.

    2015-12-01

    The glaciers of the Cordillera Blanca, Peru are rapidly retreating as a result of rising temperatures, transforming the hydrology and impacting the socio-economic and environmental systems of the Rio Santa basin. Documenting the heterogeneous spatial patterns of these changes to understand processes of water storage and flow is hindered by technologic and logistic challenges. Highly complex topography, cloud cover and coarse spatial resolution limit the application of satellite data while airborne data collection remains costly and potentially dangerous. However, recent developments have made Unmanned Aerial Vehicle (UAV) technology a viable and potentially transformative method for studying glacier dynamics and proglacial hydrology. The extreme altitudes (4000-6700m) of the Cordillera Blanca limit the use of 'off the shelf' UAVs. Therefore we developed a low cost multispectral (visible, near-infrared and thermal infrared) multirotor UAV capable of conducting fully autonomous aerial surveys at elevations over 5000m within the glacial valleys of the Cordillera Blanca. Using this platform we have completed repeat aerial surveys (in 2014 and 2015) of the debris covered Llaca Glacier, generating highly accurate 10-20cm DEM's and 5cm orthomosaics using a structure from motion workflow. Analysis of these data reveals a highly dynamic system with some areas of the glacier losing as much as 16m of vertical elevation, while other areas have gained up to 5m of elevation over one year. The magnitude and direction of these changes appears to be associated with the presence of debris free ice faces and meltwater ponds. Additionally, we have mapped proglacial meadow and wetland systems. Thermal mosaics at 10-20cm resolution are providing novel insights into the hydrologic pathways of glacier meltwater including mapping the distribution of artesian springs that feed these wetland systems. The high spatial resolution of these UAV datasets facilitates a better understanding of the

  7. Evaluación de recursos hídricos de las sierras Blanca y Mijas (Málaga

    Directory of Open Access Journals (Sweden)

    Vadillo, I.

    1997-04-01

    Full Text Available A water balance of Sierras Blanca and Mijas Hydrogeological Unit, the most important aquifer in the Costa del Sol, in the period 1990/91-1993/94, has been made. The recharge is produced by the infiltration of rain water with a total amount of 116.9 hmhm3/year/year: 60.2 hm3/year has been evapotranspirated, 56.7 hm3/year belongs to the useful rain (8 hm3/year as streamflow and 48.7 hm /year as infiltration. The discharge have been measured and gives a total amount of 62.2 hm3/year: 28.2 hm3/year by the springs and 34 hm3/year by the pumpings. The useful rain has been calculated with several methods (Turc, Coutagne, Kessler, chloride method and monthly and daily Thornwaite method -with field capacities of 25 and 50 mm-. The method that fits in a better way with the known volumes of recharge and discharge, for each one of the aquifer system and for the whole Blanca-Mijas Hydrogeological Unit, is the chloride method.Se ha realizado el balance de la Unidad Hidrogeológica Sierra Blanca-Sierra de Mijas, la más importante de la Costa del Sol, para la media del período 1990/911993/ 94. La precipitación media sobre la Unidad es de 116,9 hm3/año: 60,2 hm3/año se evapotranspiran y 56,7 hm3/año constituyen la lluvia útil (8 hm3/año de escorrentía y 48,7 hm3/año de infiltración eficaz. Las salidas controlables ascienden a 62,2 hm3/año: 28,2 hm3/año se descargan por manantiales y 34 hm3/año por bombeos. La lluvia útil se ha calculado mediante varios métodos (Turc, Coutagne, Kessler, balance de cloruros, Thornwhite diario y mensual -con capacidades de campo de 25 y 50 mm-. El método que más se adapta a los volúmenes conocidos de entradas y salidas, para cada uno de los sistemas acuíferos y para la Unidad Hidrogeológica BlancaMijas en su conjunto, es el balance de cloruros.

  8. Use of three joints as predictors of carcass and body fat depots in Blanca Celtibérica goats

    OpenAIRE

    Teixeira, A.; Delfa, R.; González, C.; Gosalvez, L.F.; Tor, M.

    1995-01-01

    Nineteen adult goats of the Blanca Celtibérica breed - in non productive stage - from the experimental flock of Servicio de Investigación Agraria (Diputación General de Aragón) were scored using the lumbar, breast and tail palpation. Sternal triangle joint, lumbar square jointt a ailn tdha t were handled to assess body condition scores were dissected into muscle, bone subcutaneous fat and intermuscular fat. Regression analyses were developed for predicting carcass and body fat dep...

  9. La mujer en el subsector del alojamiento: el caso de la Costa Blanca (Alicante, España)

    OpenAIRE

    Sigüenza, María Carmen

    2011-01-01

    El artículo se acerca, desde la perspectiva de género, al mercado laboral general, y al relacionado con el alojamiento en particular, en la Costa Blanca (España). Dentro de la empresa hotelera, se centra en su organigrama y la integración por género de los diferentes departamentos que lo componen; también se analizará la integración horizontal y vertical, teniendo en cuenta la posición de las mujeres en los puestos operativos, intermedios y directivos. Este artículo propone el estudio de una ...

  10. El Archivo del Centro Socialista “Agustín de Arrieta” de Bahía Blanca

    OpenAIRE

    Cabezas, Gonzalo Ezequiel

    2013-01-01

    El presente artículo se centra en el análisis de la documentación albergada por el Centro Socialista “Agustín de Arrieta” de Bahía Blanca. En primer lugar, se reconstruye brevemente el derrotero histórico de la biblioteca y del archivo del partido, derrotero íntimamente relacionado con los vaivenes, principalmente políticos, que afectaron al socialismo argentino. En segundo término, se hace una descripción general del tipo de documentación que contiene el archivo, señalando potenciales usos y...

  11. Basic diagnosis of solid waste generated at Agua Blanca State Park to propose waste management strategies.

    Science.gov (United States)

    Laines Canepa, José Ramón; Zequeira Larios, Carolina; Valadez Treviño, Maria Elena Macías; Garduza Sánchez, Diana Ivett

    2012-03-01

    State parks are highly sensitive areas of great natural importance and tourism value. Herein a case study involving a basic survey of solid waste which was carried out in 2006 in Agua Blanca State Park, Macuspana, Tabasco, Mexico with two sampling periods representing the high and low tourist season is presented. The survey had five objectives: to find out the number of visitors in the different seasons, to consider the daily generation of solid waste from tourist activities, to determine bulk density, to select and quantify sub-products; and to suggest a possible treatment. A daily average of 368 people visited the park: 18,862 people in 14 days during the high season holiday (in just one day, Easter Sunday, up to 4425 visitors) and 2092 visitors in 43 days during the low season. The average weight of the generated solid waste was 61.267 kg day(-1) and the generated solid waste average per person was 0.155 kg person(-1 ) day(-1). During the high season, the average increased to 0.188 kg person(-1 ) day(-1) and during the low season, the average decreased to 0.144 kg person(-1 ) day(-1). The bulk density average was 75.014 kg m(-3), the maximum value was 92.472 kg m(-3) and the minimum was 68.274 kg m(-3). The sub-products comprised 54.52% inorganic matter; 32.03% organic matter, 10.60% non-recyclable and 2.85% others. Based on these results, waste management strategies such as reuse/recycling, aerobic and anaerobic digestion, the construction of a manual landfill and the employment of a specialist firm were suggested.

  12. Geochronology and Fluid-Rock Interaction Associated with the Nopal I Uranium Deposit, Pena Blanca, Mexico

    International Nuclear Information System (INIS)

    Fayek, M.; Goodell, P.; Ren, M.; Simmons, A.

    2005-01-01

    The Nopal I uranium (U) deposit, Pena Blanca District, Mexico, largely consists of secondary U 6+ minerals, which occur within a breccia pipe mainly hosted by the 44 Ma Nopal and Colorados volcanic formations. These two units overly the Pozos conglomerate formation and Cretaceous limestone. Three new vertical diamond drill holes (DDHs) were recently drilled at Nopal I. DDH-PB1 with continuous core was drilled through the Nopal I deposit and two additional DDHs were drilled ∼50 m on either side of the cored hole. These DDHs terminate 20 m below the current water table, thus allowing the detection of possible gradients in radionuclide contents resulting from transport from the overlying uranium deposit. Primary uraninite within the main ore body is rare and fine-grained (∼50 micrometers), thus making geochronology of the Nopal I deposit very difficult. Uranium, lead and oxygen isotopes can be used to study fluid-uraninite interaction, provided that the analyses are obtained on the micro-scale. Secondary ionization mass spectrometry (SIMS) permits in situ measurement of isotopic ratios with a spatial resolution on the scale of a few (micro)m. Preliminary U-Pb results show that uraninite from the main ore body gives an age of 32 ± 8 Ma, whereas uraninite from the uraniferous Pozos conglomerate that lies nearly 100 m below the main ore body and 25 meters above the water table, gives a U-Pb age that is 18 O = -10.8(per t housand), whereas the uraninite within the Pozos conglomerate has a (delta) 18 O = +1.5(per t housand). If it is assumed that both uraninites precipitated from meteoric water ((delta) 18 O = -7(per t housand)), then calculated precipitation temperatures are 55 C for the uraninite from the ore body and 20 C for uraninite hosted by the Pozos conglomerate. These temperatures are consistent with previous studies that calculated precipitation temperatures for clay minerals associated with uraninite

  13. La casa y la mesa de la reina Blanca de Navarra (1433

    Directory of Open Access Journals (Sweden)

    Serrano Larrayoz, Fernando

    2000-06-01

    Full Text Available This study tries to amplify a subject not developed enough, for the moment, in the lines of historical research that are being carried out in Navarre. It is divided in two sections. On one hand, aspects as servants, provision, products and prices, among others, have been studied through the organisation in queen Blanca's Hostel. On the other hand, we have approached the symbolic factor that feeding implies. We have also studied questions relating to crockery, feeding paces, religious aspects and beneficiaries from food. At last, in spite of having few and dispersed data, we have tried to give a view about culinary practises in the navarresse court during the first half of the 15th century.[fr] L'étude envisage l'approfondisement d'un sujet jusqu'au présent peu développé, dans les lignes de recherche historique prioritaires en Navarre. Le travail est divisé en deux sections. D'une part, l'organisation de l'Hôtel de la reine Blanche, dont on a analise les serviteurs, les fourniseurs, les produits et les prix, parmis d'autres aspects de l'institution. De l'autre, on s'est approché à l'élément symbolique que la nourriture implique, en touchant des matières comme les vaisselles, les rythmes alimentaires, les aspects religieux et les bénéficiaires des aliments. Enfin, malgré les rares sources disponibles, on a cherché à donner aussi une vision générale des pratiques culinaires de la Cour navarraise au XVᵉ siècle.

  14. Water Resources and Groundwater in a Glaciated Andean Watershed (Cordillera Blanca, Peru)

    Science.gov (United States)

    McKenzie, J. M.; Gordon, R.; Baraer, M.; Lautz, L.; Mark, B. G.; Wigmore, O.; Chavez, D.; Aubry-Wake, C.

    2014-12-01

    It is estimated that almost 400 million people live in watersheds where glaciers provide at least 10% of the runoff, yet many questions remain regarding the impact of climate change and glacier recession on water resources derived from these high mountain watersheds. We present research from the Cordillera Blanca, Peru, an area with the highest density of glaciers in the tropics. While glacier meltwater buffers stream discharge throughout the range, groundwater is a major component of dry season runoff, contributing up to 50-70% of outflow in some tributaries. In order to predict future changes to water resources it is critical to understand how groundwater can offset future hydrologic stress by maintaining stream baseflow, including recharge mechanisms, subsurface pathways, storage, and net fluxes to rivers. We present a synthesis of results based on hydrologic modeling, drilling/piezometers, geophysics, and artificial and natural hydrologic tracers. Our findings show that 'pampas', low-relief mountain valleys, are critical for baseflow generation by storing groundwater on interannual timescales. Pampas have a total area of ~65 km2 and are comprised of unconsolidated glacial, talus, lacustrine and wetland (bofedales) deposits. The valleys commonly have buried talus aquifers that are overlain by low permeability, glaciolacustrine deposits. Glaciofluvial outwash deposits and small wetlands also act as unconfined aquifers. These groundwater systems appear to be primarily recharged by wet season precipitation, and at higher elevations also by glacial meltwater. Additionally a ubiquitous feature in the valleys are springs, often located at the base of talus deposits, which generate a large hydrologic flux within the hydrologic systems. While glaciers are the most visible and vulnerable component of the Andean waterscape, we argue that it is crucial to understand the complete mountain hydrologic cycle, including groundwater, in order to understand the ongoing

  15. Environmental flow assessments for transformed estuaries

    Science.gov (United States)

    Sun, Tao; Zhang, Heyue; Yang, Zhifeng; Yang, Wei

    2015-01-01

    Here, we propose an approach to environmental flow assessment that considers spatial pattern variations in potential habitats affected by river discharges and tidal currents in estuaries. The approach comprises four steps: identifying and simulating the distributions of critical environmental factors for habitats of typical species in an estuary; mapping of suitable habitats based on spatial distributions of the Habitat Suitability Index (HSI) and adopting the habitat aggregation index to understand fragmentation of potential suitable habitats; defining variations in water requirements for a certain species using trade-off analysis for different protection objectives; and recommending environmental flows in the estuary considering the compatibility and conflict of freshwater requirements for different species. This approach was tested using a case study in the Yellow River Estuary. Recommended environmental flows were determined by incorporating the requirements of four types of species into the assessments. Greater variability in freshwater inflows could be incorporated into the recommended environmental flows considering the adaptation of potential suitable habitats with variations in the flow regime. Environmental flow allocations should be conducted in conjunction with land use conflict management in estuaries. Based on the results presented here, the proposed approach offers flexible assessment of environmental flow for aquatic ecosystems that may be subject to future change.

  16. The Estuary Guide. Level 3: High School. Draft.

    Science.gov (United States)

    Alexander, Glen; And Others

    Estuaries are marine systems that serve as nurseries for animals, links in the migratory pathways, and habitat for a complex community of organisms. This curriculum guide intended for use at the high school level seeks to teach what estuaries are; provide opportunities to practice decision-making that affects estuaries; and encourage students to…

  17. Improving navigability on the Kromme River Estuary: A choice ...

    African Journals Online (AJOL)

    Navigation of estuaries is a vitally important aspect of boating recreation in South Africa and elsewhere. This paper uses a choice experiment to estimate recreation values of the Kromme River Estuary, a popular estuary along South Africa's east coast. This valuation methodology allows for the identification of preferred ...

  18. Critical analysis of the PETROBRAS monopoly end - particularities of the Bahia state, Brazil; Uma analise critica do fim do monopolio da PETROBRAS - particularidades para o Estado da Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Cerqueira, Alexandre B.; Ribeiro, Bradson F. [Bahia Univ., Salvador, BA (Brazil). Dept. de Engenharia Quimica. Curso de Especializacao em Engenharia do Gas Natural; Rocha, Georges S. [Centro Federal de Tecnologia da Bahia, Salvador, BA (Brazil)

    2005-07-01

    The Agencia Nacional de Petroleo - ANP - created in 1997 by the petroleum law has the role of regulating oil and natural gas industry activities in Brazil inciting the power self-sufficiency. The petroleum law states the end of petroleum exploration monopoly in Brazil performed by PETROBRAS. Between 1998 and 2004 ANP carried out six bid rounds in brazilian sedimentary basins offered to national and foreign companies. The exploratory activities in Bahia are resulting in commercial discoveries and positive impact to local economy. The petrochemical industry expects the startup of Manati field operation to supply repressed demand of natural gas as fuel and raw material. This article analyzes the legal and institutional processes and economics performances of these activities in Bahia's state. (author)

  19. Pitiose em ovinos nos estados de Pernambuco e Bahia Pythiosis in sheep from Pernambuco and Bahia States, Brazil

    Directory of Open Access Journals (Sweden)

    Manuel V. Carrera

    2013-04-01

    Full Text Available A pitiose é uma doença infecciosa causada pelo oomiceto aquático P. insidiosum que acomete animais e o homem, especialmente habitantes de áreas úmidas. A enfermidade apresenta como característica principal a formação de lesões com aspecto granulomatoso nos hospedeiros. Neste trabalho, relatou-se a ocorrência da pitiose em ovinos nos estados de Pernambuco (PE e Bahia (BA, Nordeste do Brasil, bem como foi avaliada a eficácia de um imunoterápico frente a esta enfermidade. Amostras de sangue de 53 ovinos foram coletadas, sendo 49 animais oriundos de propriedades localizadas em PE e quatro animais provenientes da BA. Sete ovinos demonstraram sinais clínicos de pitiose ovina. Um dos animais foi submetido à eutanásia e sua cabeça e linfonodo submandibular foram coletados e enviados para análises laboratoriais. Seis ovinos foram submetidos à imunoterapia, sendo mantidos nas instalações do setor de ovinocultura da Univasf/Petrolina-PE durante o tratamento. As técnicas de ELISA, cultura fúngica e reação em cadeia da polimerase (PCR foram utilizadas como métodos diagnósticos da pitiose ovina, sendo eficientes para confirmação dos casos clínicos no rebanho. Ao exame microscópico do material coletado da cavidade nasal de um animal eutanasiado, observou-se uma área focalmente extensa de necrose com presença de infiltrado difuso de neutrófilos íntegros e degenerados margeando a cartilagem. Somente um animal apresentou cura clínica, indicando uma eficiência no tratamento da pitiose de 16,7% (1/6. O aumento de casos de pitiose tem sido denotado em diversos municípios de PE e da BA. Neste contexto, o emprego do imunoterápico pode ser uma alternativa a ser pesquisada. Portanto, estudos futuros devem ser realizados para investigar o efeito da imunoterapia aplicada à pitiose em ovinos.Pythiosis is a devastating infectious disease caused by an aquatic oomycete, Pythium insidioum, and affects animals and humans that inhabit

  20. REGINALDO, Lucilene. Os Rosários dos Angolas: Irmandades de africanos e crioulos na Bahia setecentista.

    Directory of Open Access Journals (Sweden)

    Ênio José da Costa Brito

    2013-06-01

    Full Text Available Os Rosários dos Angolas realiza um estudo da Irmandade de Nossa Senhora do Rosário dos Pretos das Portas do Carmo( Bahia A novidade do estudo está nos subsidios coletados na Africa, Portugal e Brasil , no resgate da presença banto na Bahia e na abertura para um dialogo das cosmovisões banto e cristã.REGINALDO, Lucilene. Os Rosários dos Angolas: Irmandades de africanos e crioulos na Bahia setecentista. São Paulo: Alameda, 2011. 416p. ISBN 978-85-7939-082-1 

  1. Towards an e-Health Cloud Solution for Remote Regions at Bahia-Brazil.

    Science.gov (United States)

    Sarinho, V T; Mota, A O; Silva, E P

    2017-12-19

    This paper presents CloudMedic, an e-Health Cloud solution that manages health care services in remote regions of Bahia-Brazil. For that, six main modules: Clinic, Hospital, Supply, Administrative, Billing and Health Business Intelligence, were developed to control the health flow among health actors at health institutions. They provided database model and procedures for health business rules, a standard gateway for data maintenance between web views and database layer, and a multi-front-end framework based on web views and web commands configurations. These resources were used by 2042 health actors in 261 health posts covering health demands from 118 municipalities at Bahia state. They also managed approximately 2.4 million health service 'orders and approximately 13.5 million health exams for more than 1.3 million registered patients. As a result, a collection of health functionalities available in a cloud infrastructure was successfully developed, deployed and validated in more than 28% of Bahia municipalities. A viable e-Health Cloud solution that, despite municipality limitations in remote regions, decentralized and improved the access to health care services at Bahia state.

  2. Soil classification and carbon storage in cacao agroforestry farming systems of Bahia, Brazil

    Science.gov (United States)

    Information concerning the classification of soils and their properties under cacao agroforestry systems of the Atlantic rain forest biome region in the Southeast of Bahia Brazil is largely unknown. Soil and climatic conditions in this region are favorable for high soil carbon storage. This study is...

  3. Chupar frutas in Salvador da Bahia. A case of practice-specific alterities

    NARCIS (Netherlands)

    van de Port, M.P.J.; Mol, A.

    2015-01-01

    In this article we interfere with the naturalization of 'eating' by comparing two modes of engaging with fruits in Salvador da Bahia, Brazil. One of these is comer, which translates as 'to eat'. The other is chupar, 'to suck'. In comer, a piece of fruit crosses distinct bodily boundaries and gets

  4. Chupar frutas in Salvador da Bahia: a case of practice-specific alterities

    NARCIS (Netherlands)

    van de Port, M.; Mol, A.

    2015-01-01

    In this article we interfere with the naturalization of ‘eating’ by comparing two modes of engaging with fruits in Salvador da Bahia, Brazil. One of these is comer, which translates as ‘to eat’. The other is chupar, ‘to suck’. In comer, a piece of fruit crosses distinct bodily boundaries and gets

  5. Phosphorus and uranium in fossils of Bahia Inglesa, Chile. Comparison with actual pieces

    International Nuclear Information System (INIS)

    Rojo L, M.

    1987-01-01

    In the phosphoric ore deposit of Bahia Inglesa, Chile, several fossils of selaqueous teeth and cetaceous bones have been recognized. Whales and sharks fossil and their present equivalent parts were submitted to chemical analysis and compared regarding some elements. A discussion about the deposit's origin, is presented. (M.C.K.)

  6. Study by lead isotope method of a vein : Sobrado of the Boquira mine (Bahia State, Brazil)

    International Nuclear Information System (INIS)

    Cassedanne, J.P.; Duthou, J.-L.; Clermont-Ferrand Univ., 63

    1981-01-01

    Fourteen samples of galena from the Sobrado vein, Boquira mine (Bahia) are analysed. Lead isotope compositions show an irregular variation from the central part to the extremidades. They are the result of a mixture of lead from normal galenas and lead which aparent U/Pb ratio are higher. (ARHC) [pt

  7. Archaeometric study of ceramic figurines from the Maya settlement of La Blanca (Petén, Guatemala)

    International Nuclear Information System (INIS)

    Horcajada, P.; Roldán, C.; Vidal, C.; Rodenas, I.; Carballo, J.; Murcia, S.; Juanes, D.

    2014-01-01

    In this article, analytical results will be presented and discussed regarding a selected set of figurines from the ancient Maya settlement of La Blanca in Petén, Guatemala. The objective is to characterize the ceramic material by two analytical complementary techniques: X-ray diffraction (XRD) and total reflection X-ray fluorescence (TXRF). The data obtained by means of both XRD and TXRF were compared and analyzed by multivariate statistical techniques in order to obtain sample groups according to their chemical composition. The results of this archaeometric study have been compared to those that have been obtained through macroscopic characterization by means of the traditional classification system know as Type-Variety. Discordances have been found between the clusters obtained by the Type-Variety classification system and the multivariate classification procedures performed on analytical data. - Highlights: • TXRF and XRD analysis are used in studies of Maya figurines from La Blanca settlement (Guatemala). • Multivariate classification procedures were performed on analytical data to identify figurine groups. • Clustering of analytical data is compared with the traditional Type-Variety classification system

  8. Estuary wader capacity following severe weather mortality

    International Nuclear Information System (INIS)

    Clark, J.A.; Baillie, S.R.; Clark, N.A.; Langston, R.H.W.

    1993-01-01

    The building of a tidal power barrage across an estuary may lead to substantial changes in its ecology. Many of Britain's estuaries hold internationally important numbers of waders. Careful consideration, therefore, needs to be given to the likely effects of tidal power barrages on wader populations. The opportunity for increased understanding of the mechanisms which govern wader populations was provided by a period of severe winter weather in 1991, which resulted in a substantial mortality of waders in eastern England. Such conditions are known to be stressful to birds and the study objectives were to investigate both the effects of and recovery from severe weather. (author)

  9. The relationship between sediment and plutonium budgets in a small macrotidal estuary: Esk Estuary, Cumbria, UK

    International Nuclear Information System (INIS)

    Kelly, M.; Emptage, M.; Mudge, S.; Bradshaw, K.; Hamilton-Taylor, J.

    1991-01-01

    During a spring tide, measurements were made of sediment and 239,240 Pu discharges through a cross-section of the Esk estuary. These indicated that over the full tidal cycle, the inner estuary had a net gain of ca. 18 t of sediment and ca. 85 MBq of particulate phase 239,240 Pu, and a probable net loss of ca. 1 to 2 MBq of solution phase 239,240 Pu. Each of these was the net result of large gross discharges of sediment and plutonium into and out of the estuary for which the sea was the main source, with eroded estuarine sediment providing an additional minor source of sediment, of particulate phase plutonium and, via desorption, of solution phase plutonium. A net input with each tide, of sediment and its associated radionuclides, is considered to be typical for the Esk estuary under the normal conditions of low river flows. (author)

  10. Establishing nursery estuary otolith geochemical tags for Sea Bass (Dicentrarchus labrax): Is temporal stability estuary dependent?

    Science.gov (United States)

    Ryan, Diarmuid; Wögerbauer, Ciara; Roche, William

    2016-12-01

    The ability to determine connectivity between juveniles in nursery estuaries and adult populations is an important tool for fisheries management. Otoliths of juvenile fish contain geochemical tags, which reflect the variation in estuarine elemental chemistry, and allow discrimination of their natal and/or nursery estuaries. These tags can be used to investigate connectivity patterns between juveniles and adults. However, inter-annual variability of geochemical tags may limit the accuracy of nursery origin determinations. Otolith elemental composition was used to assign a single cohort of 0-group sea bass Dicentrarchus labrax to their nursery estuary thus establishing an initial baseline for stocks in waters around Ireland. Using a standard LDFA model, high classification accuracies to nursery sites (80-88%) were obtained. Temporal stability of otolith geochemical tags was also investigated to assess if annual sampling is required for connectivity studies. Geochemical tag stability was found to be strongly estuary dependent.

  11. Estuary fish data - Juvenile salmon in migratory corridors of lower Columbia River estuary

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Sampling juvenile salmon and associated fishes in open waters of the lower Columbia River estuary. Field work includes bi-weekly sampling during the spring...

  12. Total fine root mass and nutrient content in forest ecosystems (Pinus patula Schltdl and Cham Cupressus lusitanica Mill and Quercus humboldtii bonpl.) from Piedras Blancas, Antioquia - Colombia

    International Nuclear Information System (INIS)

    Barreto Sanchez, Luis Hernan; Leon Pelaez, Juan Diego

    2005-01-01

    In the Piedras Blancas region, Antioquia - Colombia, a sampling of fine roots K > Mg > Fe > P this study sought to highlight the importance of fine roots and their concentrations of nutrients in natural forests and plantations and their relationship with nutrient cycling. For this purpose, the methodological approach comprised total root mass, both dead and alive

  13. O candomblé da Bahia na década de 1930

    Directory of Open Access Journals (Sweden)

    Vivaldo da Costa Lima

    2004-12-01

    Full Text Available O TEXTO resgata a atuação de duas personalidades eminentes do candomblé da Bahia, na década de 1930: o babalaô Martiniano Eliseu do Bonfim e a ialorixá Eugênia Ana dos Santos, a famosa Aninha, do Centro Cruz Santa do Axé do Apo Afonjá. Martiniano, nascido na Bahia, era filho de escravos alforriados, tendo sido enviado por seu pai para estudar a língua ioruba e as tradições africanas em Lagos, na Nigéria. Voltando a Salvador, tornou-se um líder religioso e sempre manteve estreita ligação com destacados intelectuais baianos. Aninha foi outra figura modelar entre as comunidades religiosas de terreiros, destacando-se pela sua indiscutível capacidade de liderança. Tanto Martiniano como Aninha contribuíram para o grande êxito do Segundo Congresso Afro-Brasileiro, realizado em Salvador, em janeiro de 1937.THIS ESSAY recalls the life and work of two eminent personalities of the Candomble religion in Bahia in the 1830s: babalaô [Yoruba priest] Martiniano Eliseu do Bonfim and ialorixá Eugênia Ana dos Santos, the renowned Aninha, spiritual director and priestess of the Cruz Santa do Axé do Apo Afonjá Center. Martiniano, born in Bahia, was the son of emancipated slaves. He was sent by his father to study the Yoruba language and African traditions in Lagos, Nigeria, and upon returning to Salvador, became a religious leader, maintaining close relationships with noted intellectuals from Bahia. Aninha was another model figure among the religious communities of the terreiros [ritual grounds of the Candomble religion], who stood out for her incontrovertible leadership ability. Both Martiniano and Aninha contributed to the huge success of the Second Afro-Brazilian Congress held in Salvador in January 1937.

  14. U-Series Disequilibria in Soils, Pena Blanca Natural Analog, Chihuahua, Mexico

    International Nuclear Information System (INIS)

    D. French; E. Anthony; P. Goodell

    2006-01-01

    The Nopal I uranium deposit located in the Sierra Pena Blanca, Mexico. The deposit was mined in the early 1980s, and ore was stockpiled close by. This stockpile area was cleared and is now referred to as the Prior High Grade Stockpile (PHGS). Some of the high-grade boulders from the site rolled downhill when it was cleared in the 1990s. For this study soil samples were collected from the alluvium surrounding and underlying one of these boulders. A bulk sample of the boulder was also collected. Because the Prior High Grade Stockpile had no ore prior to the 1980s a maximum residence time for the boulder is about 25 years, this also means that the soil was at background as well. The purpose of this study is to characterize the transport of uranium series radionuclides from ore to the soil. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. Isotopes of the uranium series decay chain detected include 210 Pb, 234 U, 230 Th, 226 Ra, 214 Pb, and 214 Bi. Peak areas for each isotope are determined using gamma-ray spectroscopy with a Canberra Ge (Li) detector and GENIE 2000 software. The boulder sample is close to secular equilibrium when compared to the standard BL-5 (Beaver Lodge Uraninite from Canada). Results for the soils, however, indicate that some daughter/parent pairs are in secular disequilibrium. These daughter/parent (D/P) ratios include 230 Th/ 234 U, which is greater than unity, 226 Ra/ 230 Th, which is also greater than unity, and 210 Pb/ 214 Bi, which is less than unity. The gamma-ray spectrum for organic material lacks 230 Th peaks, but contains 234 U and 226 Ra, indicating that plants preferentially incorporate 226 Ra. Our results, combined with previous studies require multistage history of mobilization of the uranium series radionuclides. Earlier studies at the ore zone could limit the time span for mobilization only to a few thousand years. The contribution of this study is that the short

  15. U-Sries Disequilibra in Soils, Pena Blanca Natural Analog, Chihuahua, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    D. French; E. Anthony; P. Goodell

    2006-03-16

    The Nopal I uranium deposit located in the Sierra Pena Blanca, Mexico. The deposit was mined in the early 1980s, and ore was stockpiled close by. This stockpile area was cleared and is now referred to as the Prior High Grade Stockpile (PHGS). Some of the high-grade boulders from the site rolled downhill when it was cleared in the 1990s. For this study soil samples were collected from the alluvium surrounding and underlying one of these boulders. A bulk sample of the boulder was also collected. Because the Prior High Grade Stockpile had no ore prior to the 1980s a maximum residence time for the boulder is about 25 years, this also means that the soil was at background as well. The purpose of this study is to characterize the transport of uranium series radionuclides from ore to the soil. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. Isotopes of the uranium series decay chain detected include {sup 210}Pb, {sup 234}U, {sup 230}Th, {sup 226}Ra, {sup 214}Pb, and {sup 214}Bi. Peak areas for each isotope are determined using gamma-ray spectroscopy with a Canberra Ge (Li) detector and GENIE 2000 software. The boulder sample is close to secular equilibrium when compared to the standard BL-5 (Beaver Lodge Uraninite from Canada). Results for the soils, however, indicate that some daughter/parent pairs are in secular disequilibrium. These daughter/parent (D/P) ratios include {sup 230}Th/{sup 234}U, which is greater than unity, {sup 226}Ra/{sup 230}Th, which is also greater than unity, and {sup 210}Pb/{sup 214}Bi, which is less than unity. The gamma-ray spectrum for organic material lacks {sup 230}Th peaks, but contains {sup 234}U and {sup 226}Ra, indicating that plants preferentially incorporate {sup 226}Ra. Our results, combined with previous studies require multistage history of mobilization of the uranium series radionuclides. Earlier studies at the ore zone could limit the time span for mobilization only

  16. Geochronology and Fluid-Rock Interaction Associated with the Nopal I Uranium Deposit, Pena Blanca, Mexico

    Energy Technology Data Exchange (ETDEWEB)

    M. Fayek; P. Goodell; M. Ren; A. Simmons

    2005-07-11

    The Nopal I uranium (U) deposit, Pena Blanca District, Mexico, largely consists of secondary U{sup 6+} minerals, which occur within a breccia pipe mainly hosted by the 44 Ma Nopal and Colorados volcanic formations. These two units overly the Pozos conglomerate formation and Cretaceous limestone. Three new vertical diamond drill holes (DDHs) were recently drilled at Nopal I. DDH-PB1 with continuous core was drilled through the Nopal I deposit and two additional DDHs were drilled {approx}50 m on either side of the cored hole. These DDHs terminate 20 m below the current water table, thus allowing the detection of possible gradients in radionuclide contents resulting from transport from the overlying uranium deposit. Primary uraninite within the main ore body is rare and fine-grained ({approx}50 micrometers), thus making geochronology of the Nopal I deposit very difficult. Uranium, lead and oxygen isotopes can be used to study fluid-uraninite interaction, provided that the analyses are obtained on the micro-scale. Secondary ionization mass spectrometry (SIMS) permits in situ measurement of isotopic ratios with a spatial resolution on the scale of a few {micro}m. Preliminary U-Pb results show that uraninite from the main ore body gives an age of 32 {+-} 8 Ma, whereas uraninite from the uraniferous Pozos conglomerate that lies nearly 100 m below the main ore body and 25 meters above the water table, gives a U-Pb age that is <1 Ma. Oxygen isotopic analyses show that uraninite from the ore body has a {delta}{sup 18}O = -10.8{per_thousand}, whereas the uraninite within the Pozos conglomerate has a {delta}{sup 18}O = +1.5{per_thousand}. If it is assumed that both uraninites precipitated from meteoric water ({delta}{sup 18}O = -7{per_thousand}), then calculated precipitation temperatures are 55 C for the uraninite from the ore body and 20 C for uraninite hosted by the Pozos conglomerate. These temperatures are consistent with previous studies that calculated precipitation

  17. Delta progradation and Neoglaciation, Laguna Parón, Cordillera Blanca, Peru

    Science.gov (United States)

    Seltzer, Geoffrey O.; Rodbell, Donald T.

    2005-10-01

    The history of Holocene glaciation serves as an important record of glacier mass balance and, therefore, of climatic change. The moraine record of Holocene glaciation in the tropical Andes, however, is fragmentary and poorly dated. In contrast, increases in the rate of accumulation of inorganic sediment in glacier-fed lakes have been linked to periods of Neoglaciation in many mountain regions. The interpretation of such a record of Neoglaciation from sediment cores in glacier-fed lakes in the tropical Andes can provide the continuity and chronologic control that is lacking in the existing moraine record. Unusual exposures of glacial lacustrine sediment in the Cordillera Blanca, Peru, provide a rare opportunity to assess the link between climatic change, glaciation, and lacustrine sedimentation.Intentional lowering of water levels in Laguna Parón (9°S, 77°44 W, 4200 m a.s.l.) in 1985 resulted in the incision and exposure of at least 20 m of deltaic deposits at the eastern end of the lake. Three deltaic units can be identified: horizontal topset beds, steeply dipping and deformed foreset beds, and horizontally laminated fine-grained sediment. Six radiocarbon ages ranging from 1800 +/- 210 to 465 +/- 95 14C yr BP on wood indicate that the average rate of delta progradation in the late Holocene has been approximately 290 m per 1000 yr. The lake formed during deglaciation at least 10 000 yr ago and if such a rate of progradation of the delta had prevailed over the entire Holocene, then the delta would be at least three times as extensive as it is today. Thus the rate of delta progradation has varied significantly over the Holocene. We suggest that the rate of delta progradation was at least three times greater when glaciers were in advanced positions. These positions are clearly delimited by Neoglacial moraines, which are within 1-2 km of the exposures studied and within 1 km of modern ice limits. The most recent increase in the rate of delta progradation is

  18. Recent glacier retreat and lake formation in the Querecocha watershed, Cordillera Blanca, Peru

    Science.gov (United States)

    López Moreno, J.; Valero-Garces, B.; Revuelto, J.; Azorín-Molina, C.; Bazo, J.; Cochachin, A.; Fontaneda, S.; Mark, B. G.

    2013-12-01

    In the Andes, and specifically in the Peruvian mountains a marked decrease of the glaciated area has occurred since the end of the Little Ice Age, and it has been accelerated since the last decades of the 20th century. As a result of the glacier retreat new pro-glaciar lakes are originated, and often the area and volume of existing ones increases. The study of these newly-formed lakes and their recent evolution may provide a better understanding of the hydrological and geomorphological evolution of deglaciated areas, and a better evaluation of the risk of glacial lakes outburst floods (GLOFS). In this work, we use 26 annual Landsat Thematic Mapper images from 1975 to 2010 to determine changes of the glaciated surface, snow line elevation and lakes formation in the headwaters of the Querecocha watershed in Cordillera Blanca (Perú). We also present the information derived from 10 short sediment cores (up to 50 cm long) retrieved along several transects in Yanamarey Lake. Both data sets inform of the sediment yield and lake development in recently deglaciated environments of the Andes. Results demonstrate that only one third of the surface covered by ice in 1975 remained in 2010. In this period, snowline has shifted up more than 100 meters in elevation in both, Yanamarey North and South areas respectively. At the same time, new lakes have been formed very quickly in these deglaciated areas. Preliminary 137Cs dating of Yanamarey sediment core indicates that at least the top 50 cm of the lake sequence deposited after 1960. This is coherent with the Landsat image of 1975 that showed the current surface of the lake still covered by ice. The high sediment rate (> 1 cm/yr) in the lake demonstrates the very high sediment yield in these geomorphically active settings. The sediment cores are composed of cm-thick sequences defined by grain-size (silt-clay) common in proglacial lakes reflecting the variability of hydrological response associated to the glacier retreat in the

  19. Evolución de estrellas enanas blancas de Helio de masa baja e intermedia

    Science.gov (United States)

    Althaus, L. G.; Benvenuto, O. G.

    Numerosas observaciones realizadas particularmente en los últimos dos años parecen confirmar que las enanas blancas (EB) de helio de masa baja e intermedia son el resultado de la evolución de sistemas binarios cercanos. Con el objeto de realizar una adecuada interpretación de estos objetos son necesarios modelos de EBs de helio lo más detallado posibles. En este estudio presentamos cálculos detallados de la evolución de EBs de helio con masas entre M=0.1Msolar y M=0.5Msolar a intervalos de 0.05Msolar . Para ello, hemos tenido en cuenta los efectos de temperatura finita mediante un código de evolución estelar lo más actualizado posible. En particular, el transporte de energía es descripto en el marco del nuevo modelo para la convección turbulenta desarrollado por Canuto - Mazzitelli. Además hemos considerado la nueva ecuación de estado para plasmas de helio de Saumon et al. y nuevas opacidades radiativas OPAL. Las pérdidas por neutrinos fueron asimismo tenidas en cuenta. Excepto para las EBs más masivas, nuestros modelos iniciales están ubicados en las cercanías de la correspondiente línea de Hayashi para configuraciones de helio. Nuestros resultados muestran que existe una región prohibida en el diagrama observacional HR donde ninguna EB de helio puede encontrarse. Dicha región es para log{(L/Lsolar )}>= -0.25 and log{Teff} >= 4.45. Hemos encontrado también que los tracks evolutivos en el diagrama HR en el dominio de alta luminosidad (pre - EB) son fuertemente afectados por la eficiencia convectiva y que las pérdidas por neutrinos son importantes en los modelos más masivos. Finalmente hemos analizado la estructura de la zona convectiva externa encontrando que la teoría de Canuto - Mazzitelli conduce a un perfil convectivo muy diferente del dado por cualquier versión de la popular teoría de la mixing length. Si bién este comportamiento es decisivo en el contexto de las inestabilides pulsacionales, los radios y gravedades superficiales de

  20. Features at some significant estuaries of India

    Digital Repository Service at National Institute of Oceanography (India)

    Bhattathiri, P.M.A.

    in the second and 162 in the third. Most of the studies on various aspects have been confined to very few of these, and that too, mostly to minor ones. Very little work has been carried out from many of the estuaries of the major rivers. An overview...

  1. Radiological assessment of the Esk Estuary

    International Nuclear Information System (INIS)

    Howorth, J.M.; Barr, H.M.; Toole, J.; Strange, L.P.

    1993-01-01

    An assessment has been carried out of the radiological impact of artificial radionuclides in the Esk estuary in Cumbria, UK. Measurements were made of the distributions of 137 Cs, 239 + 240 Pu, and 241 Am in water, surface bed sediments and core profiles. The highest measured concentrations in surface sediments were 2.8 Bq g -1 of 137 Cs, 3.1 Bq g -1 of 239 + 240 Pu and 4.7 Bq g -1 of 241 Am. These values represent significant decreases from similar measurements made in 1970-1980. The measured behaviour of the actinides in low salinity water at the head of the estuary supports previous observations of actinide remobilisation from the bed. A model has been developed which simulates the long-term behaviour of radioactivity in the estuary. The model incorporates representations of tidal mixing, sediment transport, seasonal and long-term sediment accretion. The model also represents long-term build-up in salt marsh regions. The model gives good agreement with measured distributions of 137 Cs, but tends to underestimate actinide concentrations by factors of 2-3. Dose calculations show the importance of radionuclide uptake through livestock grazing sea-washed pasture alongside the estuary. 137 Cs and 241 Am are identified as the most important radionuclides considered in the assessment. (Author)

  2. Padilla Bay: The Estuary Guide. Level 2.

    Science.gov (United States)

    Friesem, Judy; Lynn, Valerie, Ed.

    Estuaries are marine systems that serve as nurseries for animals, links in the migratory pathways, and habitat for a complex community of organisms. This curriculum guide intended for use at the middle school level is designed for use with the on-site program developed by the Padilla Bay National Esturine Research Reserve (Washington). The guide…

  3. The environmental characteristics of the Ganga estuary

    Digital Repository Service at National Institute of Oceanography (India)

    SenGupta, R.; Murty, C.S.; Bhattathiri, P.M.A.

    This report presents physical, chemical and biological observations in the last 160 km stretch of river Ganga for period of 3 years. In the one-layer estuary the mixing is brought about by the horizontal gradient of the flow field closely associated...

  4. Restoration of the Golden Horn Estuary (Halic).

    Science.gov (United States)

    Coleman, Heather M; Kanat, Gurdal; Aydinol Turkdogan, F Ilter

    2009-12-01

    Restoration of the iconic Golden Horn Estuary in Istanbul, Turkey was a substantial political, logistical, ecological, and social challenge. Forty years of uncontrolled industrial and urban growth resulted in thick layers of anoxic sediment, toxic bacteria, strong hydrogen sulfide odor, and ecologically unlivable conditions. The major components of restoration, spanning two decades, have included (1) demolition and relocation of industries and homes along the shore, (2) creation of wastewater infrastructure, (3) removal of anoxic sludge from the estuary, (4) removal of a floating bridge that impeded circulation, and (5) creation of cultural and social facilities. Although Turkey is not known as an environmental leader in pollution control, the sum of these efforts was largely successful in revitalizing the area through dramatic water quality improvement. Consequently, the estuary is once again inhabitable for aquatic life as well as amenable to local resource users and foreign visitors, and Istanbul has regained a lost sense of cultural identity. This paper focuses on literature review and personal interviews to discuss the causes of degradation, solutions employed to rehabilitate the estuary, and subsequent physicochemical, ecological, and social changes.

  5. Estuaries and Tidal Marshes. Habitat Pac.

    Science.gov (United States)

    Fish and Wildlife Service (Dept. of Interior), Washington, DC.

    This educational packet consists of an overview, three lesson plans, student data sheets, and a poster. The overview examines estuaries and tidal or salt marshes by discussing the plants and animals in these habitats, marsh productivity, benefits and management of the habitats, historical aspects, and development and pollution. A glossary and list…

  6. Geochemical studies in the Godavari Estuary, India

    Digital Repository Service at National Institute of Oceanography (India)

    Somayajulu, B.L.K.; Martin, J.M.; Eisma, D.; Thomas, A.J.; Borole, D.V.; Rao, K.S.

    are reported. The DOC and Fe concentrations are lower compared with those in other estuaries of the world and are below the average value reported for world rivers. Silicon behaves non-conservatively; its depletion which is most likely due to biological...

  7. Flushing characteristics of Mahim river estuary (Bombay)

    Digital Repository Service at National Institute of Oceanography (India)

    Sabnis, M.M; Zingde, M

    to the influence of wastewater. Flushing time of 19 tidal cycles was estimated by applying modified tidal prism method. After a large number of tidal cycles the estuary would retain 9.3x10 super(4) m super(3) of wastewater which was over 15% of the spring high tide...

  8. Influence of estuaries on shelf sediment texture

    Digital Repository Service at National Institute of Oceanography (India)

    Nair, R.R.; Hashimi, N.H.

    on the coast. Offshore from regions where there are a large number of estuaries, the inner shelf sediments are fine grained (average mean size 5.02 phi, 0.03 mm), rich in organic matter ( 2%) and low in calcium carbonate ( 25%). In contrast, in regions...

  9. Carbon dioxide emissions from Indian monsoonal estuaries

    Digital Repository Service at National Institute of Oceanography (India)

    Sarma, V.V.S.S.; Viswanadham, R.; Rao, G.D.; Prasad, V.R.; Kumar, B.S.K.; Naidu, S.A.; Kumar, N.A.; Rao, D.B.; Sridevi, T.; Krishna, M.S.; Reddy, N.P.C.; Sadhuram, Y.; Murty, T.V.R.

    estuaries. The mean pCO sub(2) and particulate organic carbon (POC) showed positive relation with rate of discharge suggesting availability of high quantities of organic matter that led to enhanced microbial decomposition. The annual CO sub(2) fluxes from...

  10. Hydrodynamics of the Bot river estuary revisited

    CSIR Research Space (South Africa)

    Van Niekerk, L

    2005-01-01

    Full Text Available For the past 20 years management of the Bot/Kleinmond estuarine system in the south-western Cape has been based on the premise that, barring intervention, the estuary was naturally evolving into a freshwater coastal lake. This paper presents...

  11. Sedimentation in a river dominated estuary

    CSIR Research Space (South Africa)

    Cooper, JAG

    1993-10-01

    Full Text Available The Mgeni Estuary on the wave dominated cast coast of South Africa occupies a narrow, bedrock confined, alluvial valley and is partially blocked at the coast by an elongate sandy barrier. Fluvial sediment extends to the barrier and marine depositon...

  12. Mouth Bar Formation in Yangtze River Estuary

    NARCIS (Netherlands)

    Wei, C.

    2002-01-01

    The periodic shifting of the bifurcation point of the North Channel and South Channel of the Yangtze river is very important in the estuary. The North Channel is bifurcated from the South Branch by cutting a channel through the submerged sandbanks. Once a bifurcation channel is formed, the

  13. 76 FR 8345 - Endangered and Threatened Species; Recovery Plan Module for Columbia River Estuary Salmon and...

    Science.gov (United States)

    2011-02-14

    ... and Threatened Species; Recovery Plan Module for Columbia River Estuary Salmon and Steelhead AGENCY.... ACTION: Notice of availability; recovery plan module for Columbia River estuary salmon and steelhead... Plan Module for Salmon and Steelhead (Estuary Module). The Estuary Module addresses the estuary...

  14. First survey of fruit fly (Diptera: Tephritidae) and parasitoid diversity among myrtaceae fruit across the state of Bahia, Brazil

    OpenAIRE

    Silva, Lidia Nogueira; Santos, Mírian Silva; Dutra, Vivian Siqueira; Araujo, Elton Lucio; Costa, Marco Antonio; Silva, Janisete Gomes

    2011-01-01

    The objective of this study was to evaluate the diversity of fruit fly (Diptera: Tephritidae) species that use myrtaceous fruit, particularly guava, as hosts in several localities in the state of Bahia and to determine the infestation rates, pupal viability rates, and fruit fly-parasitoid associations. Sampling of myrtaceous fruit was carried out in 24 municipalities in different regions in the state of Bahia. Four fruit fly species, Anastrepha fraterculus, Anastrepha zenildae, Anastrepha sor...

  15. Nutrient budgets for large Chinese estuaries

    Directory of Open Access Journals (Sweden)

    S. M. Liu

    2009-10-01

    Full Text Available Chinese rivers deliver about 5–10% of global freshwater input and 15–20% of the global continental sediment to the world ocean. We report the riverine fluxes and concentrations of major nutrients (nitrogen, phosphorus, and silicon in the rivers of the contiguous landmass of China and Korea in the northeast Asia. The rivers are generally enriched with dissolved inorganic nitrogen (DIN and depleted in dissolved inorganic phosphate (PO43− with very high DIN: PO43− concentration ratios. DIN, phosphorus, and silicon levels and loads in rivers are mainly affected by agriculture activities and urbanization, anthropogenic activities and adsorption on particulates, and rock types, climate and physical denudation intensity, respectively. Nutrient transports by rivers in the summer are 3–4 times higher than those in the winter with the exception of NH4+. The flux of NH4+ is rather constant throughout the year due to the anthropogenic sources such as the sewer discharge. As nutrient composition has changed in the rivers, ecosystems in estuaries and coastal sea have also changed in recent decades. Among the changes, a shift of limiting nutrients from phosphorus to nitrogen for phytoplankton production with urbanization is noticeable and in some areas silicon becomes the limiting nutrient for diatom productivity. A simple steady-state mass-balance box model was employed to assess nutrient budgets in the estuaries. The major Chinese estuaries export <15% of nitrogen, <6% of phosphorus required for phytoplankton production and ~4% of silicon required for diatom growth in the Chinese Seas (Bohai, Yellow Sea, East China Sea, South China Sea. This suggests that land-derived nutrients are largely confined to the immediate estuaries, and ecosystem in the coastal sea beyond the estuaries is mainly supported by other nutrient sources such as regeneration, open ocean and

  16. Geologic Mapping in Nogal Peak Quadrangle: Geochemistry, Intrusive Relations and Mineralization in the Sierra Blanca Igneous Complex, New Mexico

    Science.gov (United States)

    Goff, F.; Kelley, S. A.; Lawrence, J. R.; Cikowski, C. T.; Krier, D. J.; Goff, C. J.; McLemore, V. T.

    2011-12-01

    Nogal Peak quadrangle is located in the northern Sierra Blanca Igneous Complex (SBIC) and contains most of the White Mountain Wilderness (geologic map is available at http://geoinfo.nmt.edu/publications/maps/geologic/ofgm/details.cfml?Volume=134). The geology of the quad consists of a late Eocene to Oligocene volcanic pile (Sierra Blanca Volcanics, mostly alkali basalt to trachyte) intruded by a multitude of dikes, plugs and three stocks: Rialto, 31.4 Ma (mostly syenite), Three Rivers, ca. 29 to 27 Ma (quartz syenite intruded by subordinate alkali granite), and Bonito Lake, 26.6 Ma (mostly monzonite). Three Rivers stock is partially surrounded by alkali rhyolites that geochemically resemble the alkali granites. The circular shape of the stock and surrounding rhyolites suggests they form the root of a probable caldera. SBIC rocks have compositions typical of those found within the Rocky Mountain alkaline belt and those associated with continental rift zone magmatism. Because the volcanic host rocks are deeply eroded, intrusive relations with the stocks are well exposed. Most contacts at stock margins are near vertical. Roof pendants are common near some contacts and stoped blocks up to 700 m long are found within the Three Rivers stock. Contacts, pendants and stoped blocks generally display some combination of hornfelsing, brecciation, fracturing, faulting and mineralization. Sierra Blanca Volcanics display hydrothermal alteration increasing from argillic in the NW sector of the quad to high-temperature porpylitic near stock margins. Retrograde phyllic alteration occurs within breccia pipes and portions of the stocks. Mineral deposits consist of four types: Placer Au, fissure veins (mostly Ag-Pb-Zn±Au), breccia pipes (Au-Mo-Cu), and porphyry Mo-Cu. A singular pipe on the SW margin of Bonito Lake stock contains sapphire-lazulite-alunite. Although Au has been intermittently mined in the quad since 1865, best production of Au originated around the turn of the last

  17. Glacier Changes in the Cordillera Blanca, Peru, Derived From SPOT5 Imagery, GIS and Field- Based Measurements

    Science.gov (United States)

    Racoviteanu, A.; Arnaud, Y.; Williams, M. W.; Singh Khalsa, S.

    2007-12-01

    There is urgency in deriving an extensive dataset for deriving glacier changes within the Cordillera Blanca, Peru, in a cost-effective and timely manner. Rapid glacial retreat during the last decades in this area poses a threat for water resources, hydroelectric power and local traditions. While there is some information on decadal changes in glacier extents, there still remains a paucity of mass balance measurements and glacier parameters such as hypsometry, size distribution and termini elevations. Here we investigate decadal changes in glacier parameters for Cordillera Blanca of Peru using data from Système Probatoire d'Observation de la Terre (SPOT) sensor, an old glacier inventory from 1970 aerial photography, field-based mass balance measurements and meteorological observations. Here we focus on: constructing a geospatial glacier inventory from 2003 SPOT scenes; mass balance estimations using remote sensing and field data; frequency distribution of glacier area; changes in termini elevations; hypsometry changes over time; glacier topography (slope, aspect, length/width ratio); AAR vs. mass balance for Artesonraju and Yanamarey benchmark glaciers; precipitation and temperature trends in the region. Over the last 25 years, mean temperatures increases of 0.09 deg.C/yr were greater at lower elevation than the 0.01 deg.C/yr at higher elevations, with little change in precipitation. Comparison of the new SPOT-based glacier inventory with the 1970 inventory shows that glaciers in Cordillera Blanca retreated at a rate of 0.6% per year over the last three decades, with no significant differences in the rate of area loss between E and W side. At lower elevations there is an upward shift of glacier termini along with a decrease in glacier area. Small glaciers are losing more area than large glaciers. Based on the relationship between specific mass balance (bn) and accumulation area ratio (AAR) for the two benchmark glaciers, we predicted a steady-state equilibrium line

  18. Application of the environmental isotopes to the hydrogeological study of the coastal sector in the Buenos Aires province, between Cabo San Antonio and Bahia Blanca. Final report for the period December 1984 - December 1989

    International Nuclear Information System (INIS)

    Panarello, H.O.

    1990-01-01

    Results and conclusions obtained under the framework of the 3995/RB research contract between the IAEA and the INGEIS with participation of the Dirreccion de Geologia, Mineria y Aguas Subterraneas (DGMAS) and the Centro Federal de Inversiones (C.F.I.) are presented. From the results the suitability of the isotope techniques for tracing hydrodynamic processes could be confirmed. Recharge condition also have been defined. The exceptional event of flood in the Buenos Aires province that begin in 1986 in connection with abnormal high precipitations targed infiltrating waters with the isotopical signal of the evaporation. This signal was found out in many of the sampled wells and allowed to recognize the recharge, even to significant depths. In the Pinamar and Villa Gesell towns, it was possible to establish the dynamic of wells under seasonal exploitation. In the most of cases water withdrawn in summer was recharged in the immediate precedent pluvious period. Refs, figs and tabs

  19. EL DESARROLLO DE LAS CAPACIDADES LOCALES DE ACCIÓN A PARTIR DE LA IMPLEMENTACIÓN DE ESTRATEGIAS PARTICIPATIVAS. ESTUDIO DE CASO EN EL PRERIURBANO DE BAHIA BLANCA

    Directory of Open Access Journals (Sweden)

    María Prieto

    2008-12-01

    Full Text Available Las ciudades son en estos momentos los territorios en los cuales las transformaciones se expresan con una dinámica constante. Los procesos se aceleran, se multiplican los “encuentros”, y la ciudad se expande a través de los espacios periurbanos que cada una genera. Sin embargo, en los trabajos de investigación así como en el ámbito de la gestión municipal, suele ser un tema poco abordado e incluso ignorado. A su vez, es posible cuestionar que en el momento de diagramar la enseñanza de este tipo de conceptos en las aulas universitarias, como así también en los cursos de Postgrado, existe cierta tendencia a la utilización de métodos tradicionales, entre los cuales la exposición y explicación por parte del docente se convierten en las estrategias predominantes. De este modo, se configura un clima social de trabajo ausente de la interacción y cercenando, por lo tanto, la potencialidad de los alumnos en cuanto a sus aportes. Esto limita a los futuros egresados o a los profesionales en ejercicio de su actividad, la adopción de destrezas favorables para la participación en equipos de investigación y /o gestión para los cuales la activa participación y la reflexión crítica constante, se convierten en aptitudes necesarias en el campo laboral. En el presente trabajo se analiza la importancia de incorporar la dinámica de expansión de las ciudades a partir del análisis de los espacios periurbanos. A su vez, se intenta promover el replanteo y discusión del rol de las estrategias metodológicas en el aporte a la formación del pensamiento crítico del alumno-futuro profesional. Particularmente se aborda en esta experiencia los juegos de roles por su potencial formativo y aplicabilidad en las distintas profesiones para el desarrollo, en esta oportunidad, de las capacidades locales de acción. La experiencia tiene lugar con alumnos de un curso de Postgrado en el marco de la asignatura “Enfoques Geográficos sobre Agricultura Periurbana” en el marco de la Maestría PLIDER (Procesos Locales de Innovación y Desarrollo Local. La finalidad de la misma consiste en situar en un espacio de conflicto actores con sus distintos enfoques y formaciones frente a una problemática determinada: avance de la urbanización frente a las tierras hortícolas con un esquema de producción tradicional.

  20. Historical changes in the Columbia River Estuary

    Science.gov (United States)

    Sherwood, Christopher R.; Jay, David A.; Bradford Harvey, R.; Hamilton, Peter; Simenstad, Charles A.

    Historical changes in the hydrology, sedimentology, and physical oceanography of the Columbia River Estuary have been evaluated with a combination of statistical, cartographic, and numerical-modelling techniques. Comparison of data digitized from US Coast and Geodetic Survey bathymetric surveys conducted in the periods 1867-1875, 1926-1937, and 1949-1958 reveals that large changes in the morphology of the estuary have been caused by navigational improvements (jetties, dredged channels, and pile dikes) and by the diking and filling of much of the wetland area. Lesser changes are attributable to natural shoaling and erosion. There has been roughly a 15% decrease in tidal prism and a net accumulation of about 68 × 10 6m 3 of sediment in the estuary. Large volumes of sediment have been eroded from the entrance region and deposited on the continental shelf and in the balance of the estuary, contributing to formation of new land. The bathymetric data indicate that, ignoring erosion at the entrance, 370 to 485 × 10 6m 3 of sediment has been deposited in the estuary since 1868 at an average rate of about 0.5 cm y -1, roughly 5 times the rate at which sea level has fallen locally since the turn of the century. Riverflow data indicate that the seasonal flow cycle of the Columbia River has been significantly altered by regulation and diversion of water for irrigation. The greatest changes have occurred in the last thirty years. Flow variability over periods greater than a month has been significantly damped and the net discharge has been slightly reduced. These changes in riverflow are too recent to be reflected in the available in the available bathymetric data. Results from a laterally averaged, multiple-channel, two-dimensional numerical flow model (described in HAMILTON, 1990) suggest that the changes in morphology and riverflow have reduced mixing, increased stratification, altered the response to fortnightly (neap-spring) changes in tidal forcing, and decreased the

  1. How many populations set foot through the Patagonian door? Genetic composition of the current population of Bahía Blanca (Argentina) based on data from 19 Alu polymorphisms.

    Science.gov (United States)

    Resano, M; Esteban, E; González-Pérez, E; Vía, M; Athanasiadis, G; Avena, S; Goicoechea, A; Bartomioli, M; Fernández, V; Cabrera, A; Dejean, C; Carnese, F; Moral, P

    2007-01-01

    The city of Bahía Blanca occupies a strategic place in Argentina south of the Pampean region in the north-east corner of the Patagonia. Since 1828, this city has been the historical and political border between Amerindian lands in the south, and the lands of European colonists. Nowadays, Bahía Blanca is an urban population mainly composed by descendents of immigrants from Spain and other European countries with apparently low admixture with Amerindians. In view of the unexpectedly high Amerindian admixture levels (about 46.7%) suggested by mtDNA data, and protein markers (19.5%), we analyzed a set of 19 Alu polymorphisms (18 autosomal, 1 of Chromosome Y) in a well-documented genealogical sample from Bahía Blanca. The genotyped sample was made up of 119 unrelated healthy individuals whose birth place and grandparent origins were fully documented. According to available genealogical records, the total sample has been subdivided into two groups: Bahía Blanca Original (64 individuals with all 4 gandparents born in Argentina) and Bahía Blanca Mix (55 individuals with one to three grandparents born out of Argentina). Allele frequencies and gene diversity values in Bahía Blanca fit well into the European ranges. Population relationships have been tested for 8 Alu markers, whose variation has been described in several Amerindian and European samples. Reynolds genetic distances underline the significant genetic similarity of Bahía Blanca to Europeans (mean distance 0.044) and their differentiation from Amerindians (0.146). Interestingly enough, when the general sample is divided, Bahía Blanca Original appears slightly closer to Amerindians (0.127) in contrast to Bahía Blanca Mix (0.161). Furthermore, the genetic relationships depicted through a principal components analysis emphasize the relative similarity of Bahía Blanca Original to Amerindians. A thorough knowledge of the sample origins has allowed us to make a subtle distinction of the genetic composition of

  2. Dynamics of circulation and salt balance in the upper reaches of Periyar river estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Varma, P.U.; Pylee, A.; Sankaranarayanan, V.N.

    The Eulerian residual currents of the upper reaches of Periyar estuary (Kerala, India) were directed down the estuary throughout the water column during the monsoon season. During the summer months the residual flow was directed up the estuary...

  3. Plankton composition in two estuaries of the Konkan coast during premonsoon season

    Digital Repository Service at National Institute of Oceanography (India)

    Achuthankutty, C.T.; Nair, S.R.S.; Devassy, V.P.; Nair, V.R.

    abundant at the mouth region. Zooplankton biomass was relatively high in the Kajvi Estuary and all the major groups occurred in high density throughout this estuary. In the Shastri Estuary, the zooplankton biomass was relatively lower and all the major...

  4. Eficiencia del transporte urbano de pasajeros en la localidad de Bahía Blanca, Argentina 2007-2014

    OpenAIRE

    Viego, Valentina; Universidad Nacional del Sur; Volonté, Carolina; Universidad Nacional del Sur,

    2016-01-01

    El objetivo de este artículo es evaluar la eficiencia en la prestación del servicio de transporte urbano por colectivo en la ciudad de Bahía Blanca, Argentina. Las estimaciones se realizaron mediante la aplicación del método de frontera estocástica a una función de producción con datos de panel para el período 2007-2014. Los resultados indican que el nivel medio de eficiencia no varió significativamente durante el período analizado. Asimismo, las transferencias monetarias y la concentración d...

  5. La educación de las mujeres en dos novelas peruanas del siglo XIX : Herencia y Blanca Sol

    OpenAIRE

    Bustamante Oliva, Lita Giannina

    2015-01-01

    Esta investigación describe la situación de la educación de las mujeres peruanas de la élite limeña a partir de la segunda mitad del siglo XIX. Analizando los aspectos educativos presentados en las novelas Herencia y Blanca Sol, de Clorinda Matto de Turner y Mercedes Cabello de Carbonera respectivamente, se explican e interpretan las características de la educación que se ofrecía a niñas y jóvenes en la capital del Perú. Por un lado, los colegios privados de la época presentaban tanto un curr...

  6. Nuevo registro del loro frente blanca (Amazona albifrons para la Isla de Cozumel, Quintana Roo, México

    Directory of Open Access Journals (Sweden)

    Alexis Herminio Plasencia Vázquez

    2012-01-01

    Full Text Available Reportamos, por primera vez en la literatura científica, al loro frente blanca (Amazona albifrons como especie introducida en áreas urbanas de la Isla de Cozumel, Quintana Roo, durante el trabajo de campo realizado en el mes de abril de 2011. Su presencia sólo en áreas urbanas de la isla, la capacidad de la especie para poder vivir con éxito en áreas urbanas, la abundancia de árboles frutales y su uso como mascota por los isleños nos permite sugerir que los individuos registrados son resultado de escapes o fueron liberados por sus dueños. Es probable que las condiciones sean favorables para el establecimiento de una población dentro del poblado de San Miguel de Cozumel, lo que debe monitorearse en el futuro.

  7. Modeling of U-series Radionuclide Transport Through Soil at Pena Blanca, Chihuahua, Mexico

    Science.gov (United States)

    Pekar, K. E.; Goodell, P. C.; Walton, J. C.; Anthony, E. Y.; Ren, M.

    2007-05-01

    The Nopal I uranium deposit is located at Pena Blanca in Chihuahua, Mexico. Mining of high-grade uranium ore occurred in the early 1980s, with the ore stockpiled nearby. The stockpile was mostly cleared in the 1990s; however, some of the high-grade boulders have remained there, creating localized sources of radioactivity for a period of 25-30 years. This provides a unique opportunity to study radionuclide transport, because the study area did not have any uranium contamination predating the stockpile in the 1980s. One high-grade boulder was selected for study based upon its shape, location, and high activity. The presumed drip-line off of the boulder was marked, samples from the boulder surface were taken, and then the boulder was moved several feet away. Soil samples were taken from directly beneath the boulder, around the drip-line, and down slope. Eight of these samples were collected in a vertical profile directly beneath the boulder. Visible flakes of boulder material were removed from the surficial soil samples, because they would have higher concentrations of U-series radionuclides and cause the activities in the soil samples to be excessively high. The vertical sampling profile used 2-inch thicknesses for each sample. The soil samples were packaged into thin plastic containers to minimize the attenuation and to standardize sample geometry, and then they were analyzed by gamma-ray spectroscopy with a Ge(Li) detector for Th-234, Pa-234, U-234, Th-230, Ra-226, Pb-214, Bi-214, and Pb-210. The raw counts were corrected for self-attenuation and normalized using BL-5, a uranium standard from Beaverlodge, Saskatchewan. BL-5 allowed the counts obtained on the Ge(Li) to be referenced to a known concentration or activity, which was then applied to the soil unknowns for a reliable calculation of their concentrations. Gamma ray spectra of five soil samples from the vertical profile exhibit decreasing activities with increasing depth for the selected radionuclides

  8. Emerging Glacial Lakes in the Cordillera Blanca, Peru: A Case Study at Arteson Glacier

    Science.gov (United States)

    Chisolm, R. E.; Mckinney, D. C.; Gomez, J.; Voss, K.

    2012-12-01

    Tropical glaciers are an essential component of the water resources systems in the mountainous regions where they are located, and a warming climate has resulted in the accelerated retreat of Andean glaciers in recent decades. The shrinkage of Andean glaciers influences the flood risk for communities living downstream as new glacial lakes have begun to form at the termini of some glaciers. As these lakes continue to grow in area and volume, they pose an increasing risk of glacial lake outburst floods (GLOFs). Ice thickness measurements have been a key missing link in studying the tropical glaciers in Peru and how climate change is likely to impact glacial melt and the growth of glacial lakes. Ground penetrating radar (GPR) has rarely been applied to glaciers in Peru to measure ice thickness, and these measurements can tell us a lot about how a warming climate will affect glacier mass balance. This study presents GPR data taken in July 2012 at the Arteson glacier in the Cordillera Blanca, Peru. A new lake has begun to form at the terminus of the Arteson glacier, and this lake has key features, including overhanging ice and loose rock likely to create landslides, that could trigger a catastrophic GLOF if the lake continues to grow. This new lake is part of a series of three lakes that have formed below the Arteson glacier. The two lower lakes, Artesonraju and Paron, are much larger so that if there were an avalanche or landslide into the new lake below Arteson glacier, the impact could potentially be more catastrophic than a GLOF from one single lake. Estimates of how the lake mass balance is likely to evolve due to the retreating glacier are key to assessing the flood risk from this dynamic three-lake system. Because the glacier mass balance and lake mass balance are closely linked, the ice thickness measurements and measurements of the bed slope of the Arteson glacier and underlying bedrock give us a clue to how the lake is likely to evolve. GPR measurements of

  9. Potenciální nebezpečnost vybraných morénami hrazených jezer v pohoří Cordillera Blanca, Peru

    OpenAIRE

    Emmer, Adam

    2013-01-01

    Adam Emmer: Potential hazardousness of selected moraine-dammed lakes in the Cordillera Blanca, Peru ABSTRACT: This work is devided into the two parts. Firs part reviews contemporary methods of assessment of potential hazardousness for moraine-dammed lakes (eight qualitative methods and three quantitative methods). Second part has two main aims: 1) Assessment of potential hazardousness of seven selected moraine-dammed lakes in the Cordillera Blanca, and 2) Analysis of suitability of these meth...

  10. Review Article: Lake and breach hazard assessment for moraine-dammed lakes: an example from the Cordillera Blanca (Peru

    Directory of Open Access Journals (Sweden)

    A. Emmer

    2013-06-01

    Full Text Available Glacial lake outburst floods (GLOFs and related debris flows represent a significant threat in high mountainous areas across the globe. It is necessary to quantify this threat so as to mitigate their catastrophic effects. Complete GLOF hazard assessment incorporates two phases: the probability of water release from a given glacial lake is estimated through lake and breach hazard assessment while the endangered areas are identified during downstream hazard assessment. This paper outlines a number of methods of lake and breach hazard assessment, which can be grouped into three categories: qualitative, of which we outline eight; semi-quantitative, of which we outline two; and quantitative, of which we outline three. It is considered that five groups of critical parameters are essential for an accurate regionally focused hazard assessment method for moraine-dammed lakes in the Cordillera Blanca. These comprise the possibility of dynamic slope movements into the lake, the possibility of a flood wave from a lake situated upstream, the possibility of dam rupture following a large earthquake, the size of the dam freeboard (or ratio of dam freeboard, and a distinction between natural dams and those with remedial work. It is shown that none of the summarised methods uses all these criteria with, at most, three of the five considered by the outlined methods. A number of these methods were used on six selected moraine-dammed lakes in the Cordillera Blanca: lakes Quitacocha, Checquiacocha, Palcacocha, Llaca, Rajucolta, and Tararhua. The results have been compared and show that each method has certain advantages and disadvantages when used in this region. These methods demonstrate that the most hazardous lake is Lake Palcacocha.

  11. Recalibration of the yellow Rhizocarpon growth curve in the Cordillera Blanca (Peru) and implications for LIA chronology

    Science.gov (United States)

    Jomelli, V.; Grancher, D.; Brunstein, D.; Solomina, O.

    2008-01-01

    A new lichen dating method and new moraine observations enabled us to improve the chronology of glacier advances in the Cordillera Blanca (Peru) during the Little Ice Age (LIA). Our results reveal that an early LIA glacial advance occurred around AD 1330 ± 29. However, a second major glacial advance at the beginning of the 17th century overlapped the earlier stage for most glaciers. Hence, this second glacial stage, dated from AD 1630 ± 27, is considered as the LIA maximum glacial advance in the Cordillera Blanca. During the 17th-18th centuries, at least three glacial advances were recorded synchronously for the different glaciers (AD 1670 ± 24, 1730 ± 21, and 1760 ± 19). The moraines corresponding to the two first stages are close to the one in 1630 suggesting a slow recession of about 18% in the total length of the glacier. From the LIA maximum extent to the beginning of the 20th century, the 24 glaciers have retreated a distance of about 1000 m, corresponding to a reduction of 30% in their length. This rate is comparable to that observed during the 20th century. Estimates of palaeo-Equilibrium Line Altitudes show an increase in altitude of about 100 m from the LIA maximum glacial extension at the beginning of the 17th century to the beginning of the 20th century. Because long time series are not available for precipitation and temperature, this glacial retreat is difficult to explain by past climate changes. However, there is a fair correspondence between changes in glacier length and the δ18O recorded in the Quelccaya ice core at a century timescale. Our current knowledge of tropical glaciers and isotope variations leads us to suggest that this common tropical signal reflects a change from a wet LIA to the drier conditions of today. Finally, a remarkable synchronicity is observed with glacial variations in Bolivia, suggesting a common regional climatic pattern during the LIA.

  12. Fitonematóides associados à gravioleira (Annona muricata no sul da Bahia Phytonematodes associated to soursop tree (Aannona muricata in the south of Bahia

    Directory of Open Access Journals (Sweden)

    Arlete Silveira

    2008-09-01

    Full Text Available Nematóides têm sido reportados, em alguns Estados do Brasil, causando danos à gravioleira (Annona muricata L.. No sul da Bahia, o cultivo da graviola é bastante recente; portanto, há carência de informações sobre os problemas fitossanitários. O presente estudo teve como objetivo o levantamento dos fitonematóides associados a gravioleiras dos municípios de Una e Ilhéus, sul da Bahia (BA. Subamostras de solo e raízes de 10 diferentes plantas foram coletadas, ao acaso, e misturadas para formar uma amostra composta representativa de cada pomar. As análises nematológicas foram realizadas nos Laboratórios de Fitopatologia e Nematologia da Universidade Estadual de Santa Cruz (UESC, Ilhéus-BA, e Universidade Federal de Viçosa (UFV, Viçosa-MG. Os nematóides encontrados associados à gravioleira foram: Aphelenchoides sp., Aphelenchus sp., Helicotylenchus sp., Mesocriconema sp., Rotylenchus sp., Rotylenchulus sp. e Tylenchus sp. Futuramente, serão conduzidos estudos para avaliar a patogenicidade desses nematóides à gravioleira.Nematodes have been reported in some States of Brazil causing damage to soursop (Annona muricata L.. In the South of Bahia, the soursop growing is very recent; therefore there is a lack of information regarding its phytosanitary problems. The present study aimed the survey of plant nematodes associated with soursop in the municipal district of Una and Ilhéus, South of Bahia (BA. Soil and root subsamples from 10 distinct soursop plants were randomly collected and mixed to form a representative composite sample of each orchard. The nematodes analyses were carried out in the Laboratories of Plant Pathology and Nematology of the University of Ilhéus, BA (UESC and Viçosa, MG (UFV. The nematodes found associated with soursop were: Aphelenchoides sp., Aphelenchus sp., Helicotylenchus spp., Mesocriconema spp., Rotylenchus sp., Rotylenchulus sp. and Tylenchus sp. Future studies will be conducted to evaluate the

  13. Contribuição à biologia de serpentes da Bahia, Brasil: I. vivíparas Contribution to reproductive biology of snakes in Bahia, Brazil: I. viviparous

    Directory of Open Access Journals (Sweden)

    Rejane Maria Lira-da-Silva

    1994-01-01

    Full Text Available Great part of lhe avaiable data about snakes reprodution refers to species coming from subtropical and temperate regions. In Brazil, the data is rather rare and can be found in various works where information is restricted. Results from studies developed with five viviparous snakes - Crotalus durissus cascavella (Wagler, 1824. Bothrops erythromelas(Amaral, 1923, B. leucurus (Wagler, 1824, Helicops leopardinus (Schlegel, 1873 and Thamnodynastes strigilis (Thiinberg, 1787 - which come from the Northeast of Brazil (Bahia are described. Data about pregnancy and birth, number, sex ratio, length and weight of neonates is given and discussed.

  14. Wind power system for Sao Gabriel, Irece region, Bahia-Brazil; Sistema eolico de Sao Gabriel, regiao de Irece-Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Bruni, Carlos D' Alexandria [Centro Federal de Educacao Tecnologica da Bahia (CEFET-BA), Salvador, BA (Brazil)], e-mail: carlosbruni@cefetba.br; Camelier, Luiz Alberto A. [Companhia de Engenharia Rural da Bahia, Salvador, BA (Brazil)], e-mail: lcamelier@ig.com.br

    2004-07-01

    An electric power plant supplied by a wind-generator is the solution for supply drink water on a small community on Sao Gabriel, Irece - Bahia -Brazil. On behalf of the feasibility a wind power system is described in detail concerning it's technical specifications, it's operation, constraints and it's energy demand. Furthermore wind power system supply is described in detail. Simulations is shows how the system is designed to guarantee a reliability in pumping of drinking water powered by wind power system and it's expansion in the future. (author)

  15. Tuberculose na cidade de Salvador, Bahia, Brasil: o perfil na década de 1990 Tuberculosis in Salvador, Bahia, Brazil, in the 1990s

    Directory of Open Access Journals (Sweden)

    Maria Izabel Mota Xavier

    2007-02-01

    Full Text Available Com o objetivo de caracterizar o perfil epidemiológico da tuberculose (incidência e mortalidade no Município de Salvador, Bahia, Brasil, na década de 1990, foram analisadas as características demográficas, clínicas e laboratoriais dos casos e óbitos por esta doença ocorridos no período. Foram calculadas as taxas médias anuais de mortalidade e da incidência por sexo, faixa etária e formas clínicas da doença com base nas informações dos bancos de dados do Sistema de Informações de Tuberculose da Secretaria de Saúde do Estado da Bahia e do Sistema de Informações de Mortalidade do Ministério da Saúde. Analisou-se a distribuição espacial da tuberculose segundo distritos sanitários. Ficou evidente o predomínio dos casos e óbitos no sexo masculino e na faixa etária de 15 a 39 anos. A forma pulmonar apresentou uma maior taxa de incidência e de mortalidade. Sobre a hipótese de que, a co-infecção AIDS/tuberculose possa contribuir para manter elevadas taxas de mortalidade, os dados existentes não corroboram para esta associação. A maior ocorrência de tuberculose em determinados distritos sanitários pode estar associada à densidade populacional e às condições desfavoráveis de vida.The characteristics of tuberculosis (TB cases and deaths were analyzed in order to characterize the epidemiological profile of TB (incidence and mortality in Salvador, Bahia, Brazil, in the 1990s. Annual incidence and mortality rates were calculated by gender, age bracket, and clinical forms of the disease using databases from the Tuberculosis Information System of the Bahia State Health Secretariat and the Mortality Information System of the Brazilian Ministry of Health. TB spatial distribution was analyzed according to health district. Cases and deaths were predominantly in males in the 15 to 39 year group. The pulmonary form showed the highest incidence and mortality. The existing data did not corroborate the hypothesis that AIDS

  16. Microglanis pataxo, a new catfish from southern Bahia coastal rivers, northeastern Brazil (Siluriformes: Pseudopimelodidae

    Directory of Open Access Journals (Sweden)

    Luisa M. Sarmento-Soares

    Full Text Available A new pseudopimelodid catfish of the genus Microglanis, collected in small rivers at the lower and middle Peruípe, middle Jucuruçu and Cahy basins, in the southeastern coast of the Bahia state, is described. The new species has a comparatively high number of anal fin proximal radials, 12, shaped as thin tubes, the last one bearing a laminar extension; a pectoral fin spine with a bony point and with a smaller number of serrations on its posterior border; seven pleural ribs and a narrow head width. We provide information on the external morphology and also on some osteological features for the new species. A key to species is presented for the coastal drainages between Rio de Janeiro and Bahia states.

  17. Geophysical studies of ilmenite and monazite placers in Itaparica island - Bahia State

    International Nuclear Information System (INIS)

    Cerqueira Neto, J.X.

    1976-01-01

    A ground scintillometric survey along the southern shores of the island of Itaparica, Bahia, Brazil, discovered numerous anomalies. Detailed geophysical and sedimentological studies proved that the major anomaly is due to an ilmenite placer deposit. A comparison of the field geophysical measurements (ground scintillometry, magnetics and induced polarization) with the laboratory samples suggests the following: i) Ground scintillometry is suitable for locating and delineating such placer deposits. ii) Induced polarization is useful to investigate the deposit at depth. iii) Magnetic surveys were not particularly useful in spite of the high ilmenite concentration, thus they do not appear to be a helpful survey tool in this case. A more extensive prospecting program in the Brazilian coastal areas particularly in the State of Bahia are also proposed. (author)

  18. Description of a newly discovered Triatoma infestans (Hemiptera: Reduviidae Foci in Ibipeba, State of Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Renato Freitas Araújo

    2014-07-01

    Full Text Available Introduction Chagas disease transmitted by the Triatoma infestans was eradicated from Brazil in 2006. However, reports of triatomine foci threaten the control of Chagas disease. The goal of this study was to determine T. infestans foci in the City of Ibipeba, State of Bahia. Methods Triatominae specimens were collected in Ibipeba and entomologic indicators were calculated using indices of domiciliary infestation, density, and colonization. Results T. infestans foci was discovery in Ibipeba, State of Bahia. Approximately 95% of the specimens were discovered inside dwellings, of which 34% were T. infestans. This species was also discovered forming a colony in tree bark in the peridomicile. Conclusions Triatoma infestans foci in peridomestic ecotopes in Ibipeba, BA, indicate increased the risk of transmission Chagas disease.

  19. Teacher training in the formation of the higher education system in the state of Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Daisi Teresinha Chapani

    2012-05-01

    Full Text Available The higher education system in the state of Bahia, Brazil, comprises four universities offering, altogether, several undergraduation and graduation courses, in a number of areas. The system configuration is around 20 years old, but the colleges which gave rise to it were structured back in the late sixties. The aim of this study is to highlight the teacher training role in the system formation. Also, it is presented a discussion on the possibilities and limitations originated from the teacher training colleges in the higher education democratization process. The conclusion is that, although the teacher training courses have been the driving force of the higher education system in Bahia for more than 40 years, the number of vacancies offered by the course is not sufficient to equate the historical problem regarding the lack of titled teachers in the state.

  20. Cerambycidae (Coleoptera from Lagoa do Tamburí farm, Aracatu – Bahia, with new records

    Directory of Open Access Journals (Sweden)

    ANDRÉ DA SILVA FERREIRA

    2015-01-01

    Full Text Available ABSTRACTSpecies of Cerambycidae were inventoried in an area of Caatinga (dryland vegetation in the municipality of Aracatu, Bahia State, Brazil, between August/2012 and July/2013. The insects were collected using light traps, active searches, and white cloth trapping. A total of 716 specimens of Cerambycidae were collected; 665 of them were identified as belonging to 107 species, 84 genera, 30 tribes, and 3 subfamilies. The speciesPhaedinus carbonelli Monné, 1999,Lepturges (Lepturges fasciculatoides Gilmour, 1962,Hoplistonychus bondari Melzer, 1930,Ataxia arenaria Martins & Galileo, 2013 were new records for Bahia;Nesozineus obscurus Hoffmann, 1984 is new record for Brazil. The subfamily Cerambycinae demonstrated the greatest richness, with 56 species. These results contribute to our knowledge of the Cerambycidae fauna of Brazil.

  1. The occurrence of Callinectes arcuatus ordway, 1863 (Crustacea, Decapoda, Portunidae in Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Edilson Pires de Gouvêa

    1987-01-01

    Full Text Available During the study of the Carcinofauna of the Bahian Coast, some Brachyura Portunidae were found. Some of these animals were Callinectes arcuatus Ordway, 1863 which has its distribution restricted to the Pacific Ocean, from California to Peru and the Galapagos Islands. This is the first occurrence of this species reported from the Atlantic Ocean and the Brazilian Coast (Bahia, 38º50'Wand 12º50'S.Durante o estudo da carcinofauna do litoral baiano, muitos Braquiuros Portunidae foram encontrados. Alguns destes animais foram Callinectes arcuatus Ordway, 1863 que possuia sua distribuição restrita da Califórnia ao Peru e Ilhas Galápagos, no Oceano Pacífico. Esta é a primeira ocorrência desta espécie no Oceano Atlântico e na Costa Brasileira. (Bahia, 12º50'S e 38º50'W.

  2. Geochemical evaluation of marginal basins in the south of Bahia state, Brazil

    International Nuclear Information System (INIS)

    Gaglianone, P.C.; Trindade, L.A.F.; Nascimento, M.M. do

    1987-01-01

    Geochemical analyses were performed on more than 700 rock samples and 4 oil samples, from Mucuri, Cumuruxatiba and Jequitinhonha basins, offshore Bahia state, Brazil. The methods employed in this study includes the evaluation of organic carbon contents, Rock-Eval pyrolysis, vitrinite reflectance, carbon isotopes, assessment of oils and extrats by liquid and gas chromatography and gas chromatography - spectrometry. Three main source rock systems have been identified in offshore Bahia: the Mucuri shales from Rio da Serra and Aratu Stages lower Neocomian related to a lacustrine fresh water environment; the Jiquia shales (Upper Neocomian) deposited in a lacustrine saline water environment, and the Alagoas Shales related to an evaporitic environment of Aptian age. (author) [pt

  3. The necessity of environmental impact evaluation of petroleum flux in Salvador metropolitan region, Bahia

    International Nuclear Information System (INIS)

    Oliveira, J.G. de; Cunha, R.P.P. da; Lemos, A.L.M.; Leite, J.V.; Oliveira, L.M. de.

    1990-01-01

    This paper, through the analysis of the petrol flux's in a Regiao Metropolitana de Salvador (RMS), tries to identify the environmental impacts related to their activity from the research/extraction, production, storage and, transportation to the refinery. The Energetic and Environmental Diagnostic of the state of Bahia, in development by the Interdisciplinary Sector of Energy (SIEnergia-NST/UFBA) is the reference in which this work is inside. (author)

  4. “Drift Sailing”: ethnographic notes about Tourism in Ilhéus, Bahia

    OpenAIRE

    Roque Pinto

    2008-01-01

    This paper attempts to discuss some issues on tourism in Ilhéus City, located in south Bahia State, Brazil, focusing mainly on relations between local entrepreneurs and the place and trying to analyze in which ways those relations influence the local touristic system itself. It stems from a qualitative research based on data from ethnographic descriptions. Research techniques such as participant observation, semi-structured survey and non-structured survey were used, and the subjects were con...

  5. MICROBIOLOGICAL EVALUATION OF DAIRY PRODUCTS COMMERCIALIZED IN VITÓRIA DA CONQUISTA - BAHIA

    OpenAIRE

    Bianca Cabral Pinto da Fonseca; Joice Neves Reis; Milena Soares dos Santos

    2016-01-01

    The objective of this study was to identify the microbiological quality and prevalence of Escherichia coli, Salmonella and Listeria monocytogenes in pasteurized milk, cheese and butter. This is a cross-sectional study, conducted in the city of da Conquista, Bahia Vitoria, whose samples were randomly selected in open market without inspection record in a dairy region and county supermarkets with state inspection record and federal. The samples were collected between ...

  6. Demonstration of the Marine Towed Array on Bahia Salinas del Sur Vieques, Puerto Rico

    Science.gov (United States)

    2009-02-01

    much of the island, particularly in areas close to the shore, has sandy soils . The two islands protecting the mouth of the Bahia and the chain of...investigations, artificial reef projects, soil /water sampling and marine surveys. He is fully bilingual (speaks, reads & writes) English and Spanish...1,000,000 per occurrence General Aggregate - $2,000,000 Workmen’s Compensation and Employer’s Liability Insurance for Employees (including USL

  7. Megafauna do Quaternário tardio de Baixa Grande, Bahia, Brasil.

    Directory of Open Access Journals (Sweden)

    Ricardo da Costa Ribeiro

    2009-10-01

    Full Text Available It is presented the first occurrence of the late Pleistocene - Holocene mammals fossils in a gnamma-like deposit in the Baixa Grande municipality, Bahia State. The identified taxa were Eremotherium laurillardi (Pilosa – Megatheriidae, Panochthus greslebini (Cingulata - Glyptodontidae, Toxodontinae (Notoungulata - Toxodontidae and Stegomastodon waringi (Proboscidea - Gomphoteriidae. The inferred ecology for this fauna is related to a savanna/forest habitat, in a more wet climate than the present-day semi-arid climate.

  8. Marine geology of the St. Lawrence Estuary

    Energy Technology Data Exchange (ETDEWEB)

    St-Onge, Guillaume [Canada Research Chair in Marine Geology, Institut des sciences de la mer de Rimouski (ISMER) and GEOTOP Research Center, 310 allee des Ursulines, Rimouski, Quebec, G5L 3A1 (Canada); Duchesne, Mathieu J [Geological Survey of Canada, Quebec Division, 490 de la Couronne, Quebec City, Quebec, G1K 9A9 (Canada); Lajeunesse, Patrick, E-mail: guillaume_st-onge@uqar.qc.ca [Departement de geographie and Centre d' etudes nordiques, Universite Laval, Quebec City, Quebec, G1V 0A6 (Canada)

    2011-05-15

    The St. Lawrence Estuary, Eastern Canada, contains a very thick (>450 m) Quaternary sedimentary sequence. The results from recently conducted geophysical surveys in conjunction with piston coring indicate that these sediments were deposited under very high sedimentation rates, sometimes as high as {approx}30 m/ka during the last deglaciation. Results also reveal evidence of large submarine landslides during the Holocene, changes in sedimentation rates and the significant role of submarine canyons and channels to transfer sediments from the coast to the deeper marine environment. Finally, this paper highlights the presence of more than 1900 pockmarks on the seafloor of the St. Lawrence Estuary and discusses their possible origins: active hydrocarbon seeps in the Laurentian Channel and biogenic gas seepage on the northwestern shoulder of the Laurentian Channel.

  9. Marine geology of the St. Lawrence Estuary

    International Nuclear Information System (INIS)

    St-Onge, Guillaume; Duchesne, Mathieu J; Lajeunesse, Patrick

    2011-01-01

    The St. Lawrence Estuary, Eastern Canada, contains a very thick (>450 m) Quaternary sedimentary sequence. The results from recently conducted geophysical surveys in conjunction with piston coring indicate that these sediments were deposited under very high sedimentation rates, sometimes as high as ∼30 m/ka during the last deglaciation. Results also reveal evidence of large submarine landslides during the Holocene, changes in sedimentation rates and the significant role of submarine canyons and channels to transfer sediments from the coast to the deeper marine environment. Finally, this paper highlights the presence of more than 1900 pockmarks on the seafloor of the St. Lawrence Estuary and discusses their possible origins: active hydrocarbon seeps in the Laurentian Channel and biogenic gas seepage on the northwestern shoulder of the Laurentian Channel.

  10. Deschutes estuary feasibility study: hydrodynamics and sediment transport modeling

    Science.gov (United States)

    George, Douglas A.; Gelfenbaum, Guy; Lesser, Giles; Stevens, Andrew W.

    2006-01-01

    Continual sediment accumulation in Capitol Lake since the damming of the Deschutes River in 1951 has altered the initial morphology of the basin. As part of the Deschutes River Estuary Feasibility Study (DEFS), the United States Geological Survey (USGS) was tasked to model how tidal and storm processes will influence the river, lake and lower Budd Inlet should estuary restoration occur. Understanding these mechanisms will assist in developing a scientifically sound assessment on the feasibility of restoring the estuary. The goals of the DEFS are as follows. - Increase understanding of the estuary alternative to the same level as managing the lake environment.

  11. Differences in the structure of copepod assemblages in four tropical estuaries: Importance of pollution and the estuary hydrodynamics.

    Science.gov (United States)

    Araujo, Adriana V; Dias, Cristina O; Bonecker, Sérgio L C

    2017-02-15

    We examined the relationship between pollution and structure of copepod assemblages in estuaries, using sampling standardization of salinity range to reduce the effects of "Estuarine Quality Paradox". Copepod assemblages were analyzed in four Southeast Brazilian estuaries with different water quality levels and different hydrodynamic characteristics. The pollution negatively impacted the descriptors of the assemblage structure. The distribution of structure of copepod assemblages also showed a main separation trend between the most polluted estuaries and those less polluted. Temperature was the main factor affecting the assemblage structuring in the four estuaries. This factor acted in synergism with the effects of pollution impact and physical characteristics of the estuaries on the structure of copepod assemblages, supporting the potential vulnerability of coastal environments due to nutrient enrichment associated with climate change. Our study demonstrated the importance of sampling standardization of the salinity range in estuaries for reliable analysis of pollution effects on biota. Copyright © 2016 Elsevier Ltd. All rights reserved.

  12. Impact of climate change on Gironde estuary

    International Nuclear Information System (INIS)

    Laborie, Vanessya; Hissel, Francois; Sergent, Philippe

    2014-01-01

    Within the THESEUS European project, a simplified mathematical model for storm surge levels in the Bay of Biscay was adjusted on 10 events at Le Verdon using wind and pressure fields from CLM/SGA, so that the water levels at Le Verdon have the same statistic quantiles as observed tide records for the period [1960-2000]. A numerical model of the Gironde Estuary was used to evaluate future water levels at 6 locations of the estuary from Le Verdon to Bordeaux and to assess the changes in the quantiles of water levels during the 21. century using ONERC's pessimistic scenario for sea level rise (60 cm). The analysis of future storm surge levels shows a decrease in their quantiles at Le Verdon,, whereas there is an increase of the quantiles of total water levels. This increase is smaller than the sea level rise and gets even smaller as one enters farther upstream in the estuary. A series of flood maps for different return periods between 2 and 100 years and for four time periods ([1960-1999], [2010-2039], [2040-2069] and [2070-2099]) have been built for the region of Bordeaux. Quantiles of water levels in the flood plain have also been calculated. The impact of climate change on the evolution of flooded areas in the Gironde Estuary and on quantiles of water levels in the flood plain mainly depends on the sea level rise. Areas which are not currently flooded for low return periods will be inundated in 2100. The influence of river discharges and dike breaching should also be taken into account for more accurate results. (authors)

  13. Anthropogenic Carbon Pump in an Urbanized Estuary

    Science.gov (United States)

    Park, J. H.; Yoon, T. K.; Jin, H.; Begum, M. S.

    2015-12-01

    The importance of estuaries as a carbon source has been increasingly recognized over the recent decades. However, constraining sources of CO2 evasion from urbanized estuaries remains incomplete, particularly in densely populated river systems receiving high loads of organic carbon from anthropogenic sources. To account for major factors regulating carbon fluxes the tidal reach of the Han River estuary along the metropolitan Seoul, characterization of organic carbon in the main stem and major urban tributaries were combined with continuous, submersible sensor measurements of pCO2 at a mid-channel location over a year and continuous underway measurements using a submersible sensor and two equilibrator sytems across the estuarine section receiving urban streams. Single-site continuous measurements exhibited large seasonal and diurnal variations in pCO2, ranging from sub-ambient air levels to exceptionally high values approaching 10,000 ppm. Diurnal variations of pCO2 were pronounced in summer and had an inverse relationship with dissolved oxygen, pointing to a potential role of day-time algal consumption of CO2. Cruise measurements displayed sharp pCO2 pulses along the confluences of urban streams as compared with relatively low values along the upper estuary receiving low-CO2 outflows from upstream dams. Large downstream increases in pCO2, concurrent with increases in DOC concentrations and fluorescence intensities indicative of microbially processed organic components, imply a translocation and subsequent dilution of CO2 carried by urban streams and/or fast transformations of labile C during transit along downstream reaches. The unique combination of spatial and temporal continuous measurements of pCO2 provide insights on estuarine CO2 pulses that might have resulted from the interplay between high loads of CO2 and organic C of anthropogenic origin and their priming effects on estuarine microbial processing of terrigenous and algal organic matter.

  14. Impact of climate change on Gironde Estuary

    Science.gov (United States)

    Laborie, Vanessya; Hissel, François; Sergent, Philippe

    2014-05-01

    Within the THESEUS European project, a simplified mathematical model for storm surge levels in the Bay of Biscay was adjusted on 10 events at Le Verdon using wind and pressure fields from CLM/SGA, so that the water levels at Le Verdon have the same statistic quantiles as observed tide records for the period [1960-2000]. The analysis of future storm surge levels shows a decrease in their quantiles at Le Verdon, whereas there is an increase of the quantiles of total water levels. This increase is smaller than the sea level rise and gets even smaller as one enters farther upstream in the estuary. A numerical model of the Gironde Estuary was then used to evaluate future water levels at 6 locations of the estuary from Le Verdon to Bordeaux and to assess the changes in the quantiles of water levels during the XXIst century using ONERC's pessimistic scenario for sea level rise (60 cm). The model was fed by several data sources : wind fields at Royan and Mérignac interpolated from the grid of the European Climatolologic Model CLM/SGA, a tide signal at Le Verdon, the discharges of Garonne (at La Réole), the Dordogne (at Pessac) and Isle (at Libourne). A series of flood maps for different return periods between 2 and 100 years and for four time periods ([1960-1999], [2010-2039], [2040-2069] and [2070-2099]) have been built for the region of Bordeaux. Quantiles of water levels in the floodplain have also been calculated. The impact of climate change on the evolution of flooded areas in the Gironde Estuary and on quantiles of water levels in the floodplain mainly depends on the sea level rise. Areas which are not currently flooded for low return periods will be inundated in 2100. The influence of river discharges and dike breaching should also be taken into account for more accurate results.

  15. A LEXICAL ANALYSIS IN GALICIA AND IN BAHIA: DESIGNATIONS FOR ‘BALD’

    Directory of Open Access Journals (Sweden)

    Cezar Alexandre Neri Santos

    2016-12-01

    Full Text Available This paper is part of a lexical research, providing an analysis of the semantic-lexical variation in Galician and Bahia areas and has as more latent benefit the comparison of data in Brazilian Portuguese and Galician, cognate languages within the linguistic genealogy. Thus, with regard to Galicia territory, the Atlas Lingüístico Galego will be analyzed (BLANCO; GARCIA; FERNÁNDEZ, 2005 and, with regard to Brazil, data from Bahia will be analyzed, recorded in Atlas Lingüístico de Sergipe (FERREIRA et al., 1987. The objective is to examine the linguistic designations for ‘bald’ in two biases: i semantic, providing the motive roots of name formation in the paradigmatic plane of language, understanding the language selection as a political-cultural act; ii lexicographical, checking whether these names are and how they are on historical and etymological, Portuguese and Latin Language dictionaries or not, as well as whether such lexicographical markings have meanings related to baldness. Through these Atlas it is intended to check the type of relationship that can be established between the lexicon for ‘bald’ in Galicia and in Bahia.

  16. Detection of Perkinsus marinus in the oyster Crassostrea rhizophorae in southern Bahia by proteomic analysis

    Directory of Open Access Journals (Sweden)

    Thiago Ramos Pinto

    2017-01-01

    Full Text Available This study reports the presence of the pathogen Perkinsus marinus, notifiable to the World Organization for Animal Health (Office International des Èpizooties = OIE in the oyster Crassostrea rhizophorae in southern Bahia via proteomic analysis. We analyzed Crassostrea brasiliana from a long-line cultivation system and C. rhizophorae from an adjacent mangrove in Porto do Campo, Camamu Bay, Bahia, Brazil. The collections (n = 100 were performed in October 2012. In the laboratory, the oysters were measured and opened to remove the meat, which was steeped in dry ice. For extraction of proteins, adaptation of a protocol used for mussels was used, after which separation in the first dimension was taken by isoelectric focusing (IEF. The peptides were transferred to a Mass Spectrometer. The obtained spectra were analyzed with the ProteinLynx Global Server 4.2 software tool and also by MASCOT (Matrix Science and compared to the databases of the SWISSPROT and NCBI, respectively. The identification was evidenced by beta-tubulin, Perkinsus marinus ATCC 50983 and protein homology code in the database NCBI = gi | 294889481. This is the first record of P. marinus in Bahia and the fourth in Brazil.

  17. Phytoseiid mites from tropical fruit trees in Bahia State, Brazil (Acari, Phytoseiidae).

    Science.gov (United States)

    de Souza, Izabel Vieira; Sá Argolo, Poliane; Júnior, Manoel Guedes Correa Gondim; de Moraes, Gilberto José; Bittencourt, Maria Aparecida Leão; Oliveira, Anibal Ramadan

    2015-01-01

    The cultivation of tropical fruit trees has grown considerably in the state of Bahia, northeastern Brazil. Some of these have been severely attacked by phytophagous mites, which are usually controlled by the use of chemical pesticides. However, there is today a growing interest for the adoption of less aggressive measures of pest control, as for example the use of predatory mites. Most of the plant-inhabiting predatory mites belong to the family Phytoseiidae. The objective of this paper is to report the phytoseiid species found in an intensive survey conducted on cultivated tropical fruit trees in fifteen localities of the southern coast of Bahia. Measurements of relevant morphological characters are provided for each species, to complement the understanding of the morphological variation of these species. Twenty-nine species of sixteen genera were identified. A key was elaborated to assist in the separation of these species. Fifteen species are reported for the first time in the state, raising to sixty-six the number of species of this family now known from Bahia. Seventy-two percent of the species collected belong to Amblyseiinae, followed by Typhlodrominae (21%) and Phytoseiinae (7%). The most diverse genus was Amblyseius. Amblyseius operculatus De Leon was the most frequent and abundant species. Studies should be conducted to evaluate the possible role of the most common predators as control agents of the phytophagous mites co-occurring with them.

  18. Rational Consumption of Water in Administrative Public Buildings: The Experience of the Bahia Administrative Center, Brazil

    Directory of Open Access Journals (Sweden)

    Samara Fernanda da Silva

    2014-08-01

    Full Text Available The government has to lead, by example, the effort for more rational water use. Nevertheless, public buildings in countries like Brazil lack the operational and maintenance organization necessary to induce better environmental practices. This paper presents the results of a five-year effort to control and reduce water use in governmental facilities in Salvador, Bahia. Seventeen state government headquarters in Bahia took part in this initiative. The basic actions taken include: daily monitoring and analysis of water consumption, inspections and adjustments of hydraulic equipment flow, rapid repair of leaks and layout improvements in toilets. All of these are part of the main initiative, which aims to implement water management in the facilities. Ecoteams were created and trained to conduct these efforts. Water control, consumption analysis and communication have been made using AGUAPURA VIANET, an Internet software designed by the Federal University of Bahia for this specific purpose. From June 2008, to December 2013, an estimated 270,000 m3 of potable water have been saved, which represents US$ 2.7 million in water and waste water costs. This represents a monthly savings of 31% in expenses compared to the practices before the program started.

  19. [On the founders of the Institute of Mathematics and Physics, University of Bahia].

    Science.gov (United States)

    Dias, A L

    The reduced number of female students of mathematics at the University of Bahia School of Philosophy (Faculdade de Filosofia, Universidade da Bahia - FF/UBa) is quite surprising. To date, they are concentrated in areas traditionally viewed as feminine whereas men predominate in the mathematical fields. I have examined interview data from a few women who graduated in mathematics and went on to teach at the University of Bahia School of Mathematics (Faculdade de Filosofia - FF) and at the Institute of Mathematics and Physics (Instituto de Matemática e Física - IMF), where they were soon to outnumber men and constitute the majority of the mathematics teaching staff. In this study, I have investigated the course of their careers over time: from their early student days, through their time as teaching assistants and professors, and finally as founders of the Institute of Mathematics and Physics, in 1960. Special reference is made to Martha Maria de Souza Dantas, organizer of the I Brazilian Conference on Mathematics Teaching, an event which has provided the groundwork for what was to become the Institute (IMF); and to Arlete Cerqueira Lima, the mastermind behind its creation.

  20. Education reform, race, and politics in Bahia, Brazil Reforma escolar, racismo y políticas locales en Bahia, Brasil Reforma educacional, racial e política na Bahia, Brasil

    Directory of Open Access Journals (Sweden)

    Bernd Reiter

    2008-03-01

    Full Text Available This article discusses the main findings and conclusions from my field research evaluating education reform in the state of Bahia, Brazil. Data collection was done during two exploratory research trips to Salvador, the state capital, in 2001 and in 2005. The Bahian Education Reform, initiated by the state government in 1999 and funded to a great extent by the World Bank, has achieved some very significant goals, most importantly the expansion of high school education and the broadening of access to primary education in areas where access was far from universal. My research nevertheless points to some sever shortcomings, namely with regard to the situation of Afro-Brazilians. Structural racism provides one of the strongest explanations for this shortcoming. Structural racism in Bahia lowers teachers' and principals' expectations about the potential for academic achievement of poor Afro-Brazilians; structural racism widens the gap between students and principals, contributing to a mutual alienation of this two groups and jeopardizing the creation of strategic alliances and synergies inside schools; and it alienates schools from neighborhoods, impeding meaningful community and parental involvement in school management. Finally, the low recognition that public teachers receive from society as a whole, reflected by low salaries, and a general lack of institutional incentive structures that reward outstanding performance and sanction under-average performance have transformed Bahian public education into a desperado system, where the motivations of teachers and students are systematically grinded and their hopes frustrated.Este artículo discute las conclusiones principales de mi investigación en la que evalúo la reforma escolar en el estado de Bahia, Brasil. La recolección de datos fue realizada durante dos viajes exploratorios de investigación a Salvador, la capital del estado, en 2001 y en 2005. La Reforma Educacional en Bahia iniciada por el

  1. Spittlebug Cephisus siccifolius damaging eucalypt plants in the State of Bahia, Brazil Cigarrinha-de-espuma Cephisus siccifolius em plantio de eucalipto clonal no Estado da Bahia, Brasil

    Directory of Open Access Journals (Sweden)

    Genésio Tâmara Ribeiro

    2005-07-01

    Full Text Available Most common pests of eucalyptus plants in Brazil are leaf cutting ants and defoliating caterpillars. Other groups, eventually, feeding on eucalyptus include Heteroptera and cicadas. The objectives of this work were to identify and to describe attack symptoms of Cephisus siccifolius (Walker 1851 (Hemiptera: Aphrophoridae on eucalyptus trees in a stand of 25.77 hectares in the State of Bahia, Brazil, where 99.3% of them were attacked by this spittlebug. Damage was more severe on branches and leaves. Tree death was, relatively, low while those cut showed 4.7 colonies of this spittlebug with 21.9 nymphs per colony. Cultural control with the removal of trees attacked was recommended.Os insetos-praga mais comuns em plantios de eucalipto no Brasil são formigas cortadeiras e lagartas desfolhadoras. Eventualmente, outros insetos como percevejos e cigarrinhas podem danificar essas plantas. O objetivo deste trabalho foi identificar e descrever os sintomas de ataque, em um plantio de eucalipto de 25,77 hectares, no Estado da Bahia, onde 99,3% das árvores tinham sido atacadas pela cigarrinha-de-espuma Cephisus siccifolius (Walker 1851 (Hemiptera: Aphrophoridae. Os danos foram maiores em galhos e folhas. A mortalidade de árvores foi baixa, apesar de se observar 4,7 colônias de cigarrinhas por árvore, com 21,9 ninfas por colônia. O corte das árvores infestadas foi recomendado como controle.

  2. Supply chain management of the castor biodiesel in the Bahia state, Brazil; Gestao da cadeia de suprimentos do biodiesel de mamona no estado da Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Freires, Francisco G.M.; Goncalo, Thomas E.E.; Oliveira, Danillo R.S.B. [Universidade Federal do Vale do Sao Francisco (UNIVASF), Juazeiro, BA (Brazil)], E-mail: francisco.gaudencio@univasf.edu.br

    2009-07-01

    In front of the global trend for developing new ways of energy that pollute less and are renewable, Brazil emerges as a major actor in the development and use of technology for the production of biofuels. In the context of the potential of semi-arid to produce some oil used in production, the Brazilian government is enabling the production of Northeastern region. The State of Bahia is the largest producer of castor oil from Brazil, with an estimated production of 102.8 thousand tonnes of grain in the season 2008/2009 (CONAB, 2009). The development of the sector depends on appropriate government actions to support their competitive sustainability, and encouraging the improvement of management techniques in all involved. In that scenario, the logistics contributes to the development of this sector through the supply chain management. One conclusion is that the competitiveness and sustainability of the supply chain of castor in the Semi-arid of Bahia practices depends on the adoption of integrated logistics, without which the current failures prevent the consolidation of governmental objectives defined. (author)

  3. Shallow-water anomuran and brachyuran crabs (Crustacea: Decapoda from southern Bahia, Brazi l Cangrejos anomuros y braquiuros (Crustacea: Decapoda de aguas someras del sur de Bahia, Brasil

    Directory of Open Access Journals (Sweden)

    Alexandre O Almeida

    2010-01-01

    Full Text Available The objective of this study was to determine the taxonomic composition and ecological aspects of decapods crustacean species belonging to the infraorders Anomura and Brachyura in shallow marine and estuarine waters from southern Bahia, a coastline about 640 km in extent, corresponding to approximately 7% of the Brazilian coast. Sixteen species of the infraorder Anomura and 68 of the infraorder Brachyura are reported for the study area. The most important families in terms of number of species were the Panopeidae with 11 species, and the Ocypodidae and Portunidae with 9. Among the Brachyura, the southern distribution of the species Austinixa leptodactyla Coelho, 1997 (Pinnotheridae, endemic to Brazil, is extended from the coast of Sergipe to Bahía (Prado, Cumuruxatiba Beach, 17°06'18.6"S, 39°10'50.4"W. The ocypodid Uca (Leptuca cumulanta Crane, 1943 and also the pinnotherids Austinixa aidae (Righi, 1967 and Fabia byssomiae (Say, 1818 are reported for the first time from the Bahia coast. The specimen of F. byssomiae examined was collected in the mantle cavity of the clam Macoma constrict (Bruchiére, 1792 (Bivalvia: Tellinidae, a new host record for the species.El objetivo del presente estudio fue determinar la composición taxonómica y aspectos ecológicos de los crustáceos decápodos pertenecientes a los infraórdenes Anomura y Brachyura, en aguas someras, marinas y estuarinas del sur de Bahia, Brasil, una línea costera con cerca de 640 km de extensión, que corresponde aproximadamente al 7% de la costa brasileña. Para esta area de estudio se registraron 16 especies del infraorden Anomura y 68 del infraorden Brachyura. Las familias más representativas en términos de número de especies fueron Panopeidae, con 11 especies, y Ocypodidae y Portunidae, ambas con nueve especies. Entre los Brachyura, la distribución meridional de Austinixa leptodactyla Coelho, 1997 (Pinnotheridae, endémica del Brasil, se extiende desde la costa de Sergipe

  4. GAMMA-RAY CHARACTERIZATION OF THE U-SERIES INTERMEDIATE DAUGHTERS FROM SOIL SAMPLES AT THE PENA BLANCA NATURAL ANALOG, CHIHUAHUA, MEXICO

    Energy Technology Data Exchange (ETDEWEB)

    D.C. French; E.Y. Anthony; P.C. Goodell

    2005-07-18

    The Pena Blanca natural analog is located in the Sierra Pena Blanca, approximately 50 miles north of Chihuahua City, Mexico. The Sierra Pena Blanca is composed mainly of ash-flow tuffs, and the uranium in the region is contained in the brecciated zones of these tuffs. The Pena Blanca site is considered a natural analog to the proposed Yucca Mountain Nuclear Waste Repository because they share similar characteristics of structure, volcanic lithology, tectonic activity, and hydrologic regime. One of the mineralized zones, the Nopal I deposit, was mined in the early 1980s and the ore was stockpiled close to the mine. This stockpile area has subsequently been cleared and is referred to as the prior high-grade stockpile (PHGS) site. Soil surrounding boulders of high-grade ore associated with the PHGS site have been sampled. The purpose of this study is to characterize the transport of uranium series radioisotopes from the boulder to the soil during the past 25 years. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. The daughter to parent ratios are used to establish whether the samples are in secular equilibrium. Activities are determined using gamma-ray spectroscopy. Isotopes of the uranium series decay chain detected by gamma-ray spectroscopy include {sup 210}Pb, {sup 234}U, {sup 234}Th, {sup 230}Th, {sup 226}Ra, {sup 214}Pb, {sup 214}Bi, and {sup 234}Pa. Preliminary results indicate that some daughter to parent pairs appear to be in secular disequilibrium. Thorium is in excess relative to uranium, and radium is in excess relative to thorium. A deficiency appears to exist for {sup 210}Pb relative to {sup 214}Bi and {sup 214}Pb. If these results are borne out by further analysis, they would suggest transport of nuclides from the high-grade boulder into its surroundings, followed by continued leaching of uranium and lead from the environment.

  5. GAMMA-RAY CHARACTERIZATION OF THE U-SERIES INTERMEDIATE DAUGHTERS FROM SOIL SAMPLES AT THE PENA BLANCA NATURAL ANALOG, CHIHUAHUA, MEXICO

    International Nuclear Information System (INIS)

    French, D.C.; Anthony, E.Y.; Goodell, P.C.

    2005-01-01

    The Pena Blanca natural analog is located in the Sierra Pena Blanca, approximately 50 miles north of Chihuahua City, Mexico. The Sierra Pena Blanca is composed mainly of ash-flow tuffs, and the uranium in the region is contained in the brecciated zones of these tuffs. The Pena Blanca site is considered a natural analog to the proposed Yucca Mountain Nuclear Waste Repository because they share similar characteristics of structure, volcanic lithology, tectonic activity, and hydrologic regime. One of the mineralized zones, the Nopal I deposit, was mined in the early 1980s and the ore was stockpiled close to the mine. This stockpile area has subsequently been cleared and is referred to as the prior high-grade stockpile (PHGS) site. Soil surrounding boulders of high-grade ore associated with the PHGS site have been sampled. The purpose of this study is to characterize the transport of uranium series radioisotopes from the boulder to the soil during the past 25 years. Transport is characterized by determining the activities of individual radionuclides and daughter to parent ratios. The daughter to parent ratios are used to establish whether the samples are in secular equilibrium. Activities are determined using gamma-ray spectroscopy. Isotopes of the uranium series decay chain detected by gamma-ray spectroscopy include 210 Pb, 234 U, 234 Th, 230 Th, 226 Ra, 214 Pb, 214 Bi, and 234 Pa. Preliminary results indicate that some daughter to parent pairs appear to be in secular disequilibrium. Thorium is in excess relative to uranium, and radium is in excess relative to thorium. A deficiency appears to exist for 210 Pb relative to 214 Bi and 214 Pb. If these results are borne out by further analysis, they would suggest transport of nuclides from the high-grade boulder into its surroundings, followed by continued leaching of uranium and lead from the environment

  6. Comparación entre mujeres blancas y negras víctimas de la violencia de pareja en el nordeste de Brasil

    Directory of Open Access Journals (Sweden)

    Nazaré Costa

    2009-01-01

    Full Text Available El objetivo de este estudio fue comparar los casos de mujeres blancas y negras víctimas de la violencia de pareja en el nordeste de Brasil, así como determinar las diferencias de abuso dentro del marco de una relación de pareja en función de diversas variables sociodemográficas. Una muestra de 386 mujeres (183 blancas y 203 negras con relación de pareja heterosexual desde hacía al menos seis meses contestó al Index of Spouse Abuse. Los resultados encontrados permiten concluir que las mujeres de raza negra sufren más abusos en su relación de pareja que las blancas, y que la edad, el nivel educativo, la ocupación, la práctica religiosa y la ideología política no se relacionan con la frecuencia de abuso físico y no físico.

  7. Effect of Pasteurization on Flavonoids and Carotenoids in Citrus sinensis (L.) Osbeck cv. 'Cara Cara' and 'Bahia' Juices.

    Science.gov (United States)

    Brasili, Elisa; Chaves, Daniela F Seixas; Xavier, Ana Augusta O; Mercadante, Adriana Z; Hassimotto, Neuza M A; Lajolo, Franco M

    2017-02-22

    Orange juice is considered an excellent dietary source of several bioactive compounds with beneficial properties for human health. Citrus sinensis Osbeck cv. 'Cara Cara' is a bud mutation originated from 'Washington' navel orange, also known as 'Bahia' navel orange. The ascorbic acid, flavonoid, and carotenoid contents in pasteurized and nonpasteurized Bahia and Cara Cara juices using two LC-MS/MS platforms were investigated. Higher ascorbic acid content was observed in Bahia compared to Cara Cara in both pasteurized and nonpasteurized juices. Total flavanones content as well as hesperidin levels were higher in Cara Cara with respect to Bahia pasteurized juice. Cara Cara was also characterized by a significantly higher and diversified carotenoid content compared to Bahia juice with a mixture of (Z)-isomers of lycopene, all-E-β-carotene, phytoene, and phytofluene isomers accounting for the highest carotenoid proportion. The exceptionally high carotenoid content of Cara Cara may be particularly interesting for nutritional or functional studies of uncommon carotenes in a citrus food matrix.

  8. 78 FR 19103 - Safety Zone; Spanish Navy School Ship San Sebastian El Cano Escort; Bahia de San Juan; San Juan, PR

    Science.gov (United States)

    2013-03-29

    ...-AA00 Safety Zone; Spanish Navy School Ship San Sebastian El Cano Escort; Bahia de San Juan; San Juan... temporary moving safety zone on the waters of Bahia de San Juan during the transit of the Spanish Navy... Channel entrance, and to protect the high ranking officials on board the Spanish Navy School Ship San...

  9. Nutrient input through submarine groundwater discharge in two major Chinese estuaries: the Pearl River Estuary and the Changjiang River Estuary

    Science.gov (United States)

    Liu, Jianan; Du, Jinzhou; Wu, Ying; Liu, Sumei

    2018-04-01

    In this study, we used a 224Ra mass balance model to evaluate the importance of submarine groundwater discharge (SGD) for the budgets of biogenic elements in two major Chinese estuaries: the Pearl River Estuary (PRE) and the Changjiang River Estuary (CRE). The apparent water age in the PRE was estimated to be 4.8 ± 1.1 days in the dry season and 1.8 ± 0.6 days in the wet season using a physical model based on the tidal prism. In the dry season, the water age in the CRE was estimated to be 11.7 ± 3.0 days using the 224Ra/223Ra activities ratios apparent age model. By applying the 224Ra mass balance model, we obtained calculations of the SGD flow in the PRE of (4.5-10) × 108 m3 d-1 (0.23-0.50 m3 m-2 d-1) and (1.2-2.7) × 108 m3 d-1 (0.06-0.14 m3 m-2 d-1) in the dry season and wet season, respectively, and the estimated SGD flux was (4.6-11) × 109 m3 d-1 (0.18-0.45 m3 m-2 d-1) in the dry season of the CRE. In comparison with the nutrient fluxes from the rivers, the SGD-derived nutrient fluxes may play a vital role in controlling the nutrient budgets and stoichiometry in the study areas. The large amount of dissolved inorganic nitrogen and phosphorus fluxes together with high N: P ratios into the PRE and CRE would potentially contribute to eutrophication and the occurrence of red tides along the adjacent waters.

  10. Nutritional condition of fish larvae in South African estuaries: an ...

    African Journals Online (AJOL)

    Nutritional condition of fish larvae in South African estuaries: an appraisal of three biochemical methods. D Costalago, N Strydom, C Frost. Abstract. Estuaries are exposed to a number of threats and many South African estuarine systems are functionally and structurally altered. The extent to which fish are affected by these ...

  11. Columbia Estuary Ecosystem Restoration Program. 2012 Synthesis Memorandum

    Science.gov (United States)

    2013-01-01

    LCFRB Lower Columbia Fish Recovery Board LCRE lower Columbia River and estuary LCREP Lower Columbia River Estuary Partnership LWD large woody debris...hydraulic reconnections, channel creation, large woody debris [ LWD ] placement) have restored a total of 3152 acres since 2001. If land acquisition...fencing, invasive plant removal, native replanting. Mirror Lake 208 Culvert replaced with a bridge, riparian restoration, LWD enhancement, culvert

  12. Tillamook Estuary Case Study: Local Drivers Influencing Coastal Acidification

    Science.gov (United States)

    US EPA initiated a study in the Tillamook estuary and watershed focused on the impact of changes in watershed land use, ocean conditions, and weather on estuarine water quality and ecosystem goods and services production within the estuary. This project is a collaboration betwee...

  13. Management of Fishery Resources in Yangtze River Estuary

    OpenAIRE

    Li, Meiling; Huang, Shuolin

    2009-01-01

    We introduce the fish fauna composition and main commercial fishes in Yangtze River estuary. We also analyze the current situation of resources and environment in Yangtze River estuary as well as the influential factors. Finally, related countermeasures are put forward on how to protect and use the fishery resources in Yangtze River.

  14. Fish abundance and distribution in the Gamtoos estuary with notes ...

    African Journals Online (AJOL)

    favourably with other larger systems like the Sundays, Bashee and Kei estuaries. .... as well as the use of pesticides undoubtedly affects water quality in the ... Methods. Catch per unit effort (CPUE) of fish in the Gamtoos estuary was obtained ...

  15. Relation between tidal damping and wave celerity in estuaries

    NARCIS (Netherlands)

    Savenije, H.H.G.; Veling, E.J.M.

    2005-01-01

    Observations in estuaries indicate that an amplified tidal wave moves considerably faster than is indicated by the classical equation for wave propagation. Similarly, the celerity of propagation is lower if the tidal wave is damped. This phenomenon is clearly observed in the Schelde estuary (located

  16. Zooplankton community changes in Nhlabane estuary, South Africa ...

    African Journals Online (AJOL)

    made impacts since 1977, when the lake and estuary were separated by the construction of a barrage. More recent man-made events included the construction of temporary sand walls, mid-way along the estuary, to allow crossing of a mining ...

  17. Tidal exchange between a freshwater tidal marsh and an impacted estuary: the Scheldt estuary, Belgium

    NARCIS (Netherlands)

    van Damme, S.; Dehairs, F.; Tackx, M.; Beauchard, O.; Struyf, E.; Gribsholt, B.; van Cleemput, O.; Meire, P.

    2009-01-01

    Tidal marsh exchange studies are relatively simple tools to investigate the interaction between tidal marshes and estuaries. They have mostly been confined to only a few elements and to saltwater or brackish systems. This study presents mass-balance results of an integrated one year campaign in a

  18. The importance of the river-estuary interface (REI) zone in estuaries

    African Journals Online (AJOL)

    drinie

    2002-07-03

    Jul 3, 2002 ... A multidisciplinary and multi-institutional research programme studied the influence of river flow rate on salinity distribution and response of the ... alia, the state of the mouth influences the extent of water exchange with the sea, vertical and ... The Kariega Estuary is a marine dominated system with very little.

  19. Conditions for tidal bore formation in convergent alluvial estuaries

    Science.gov (United States)

    Bonneton, Philippe; Filippini, Andrea Gilberto; Arpaia, Luca; Bonneton, Natalie; Ricchiuto, Mario

    2016-04-01

    Over the last decade there has been an increasing interest in tidal bore dynamics. However most studies have been focused on small-scale bore processes. The present paper describes the first quantitative study, at the estuary scale, of the conditions for tidal bore formation in convergent alluvial estuaries. When freshwater discharge and large-scale spatial variations of the estuary water depth can be neglected, tide propagation in such estuaries is controlled by three main dimensionless parameters: the nonlinearity parameter ε0 , the convergence ratio δ0 and the friction parameter ϕ0. In this paper we explore this dimensionless parameter space, in terms of tidal bore occurrence, from a database of 21 estuaries (8 tidal-bore estuaries and 13 non tidal-bore estuaries). The field data point out that tidal bores occur for convergence ratios close to the critical convergence δc. A new proposed definition of the friction parameter highlights a clear separation on the parameter plane (ϕ0,ε0) between tidal-bore estuaries and non tidal-bore estuaries. More specifically, we have established that tidal bores occur in convergent estuaries when the nonlinearity parameter is greater than a critical value, εc , which is an increasing function of the friction parameter ϕ0. This result has been confirmed by numerical simulations of the two-dimensional Saint Venant equations. The real-estuary observations and the numerical simulations also show that, contrary to what is generally assumed, tide amplification is not a necessary condition for tidal bore formation. The effect of freshwater discharge on tidal bore occurrence has been analyzed from the database acquired during three long-term campaigns carried out on the Gironde/Garonne estuary. We have shown that in the upper estuary the tidal bore intensity is mainly governed by the local dimensionless tide amplitude ε. The bore intensity is an increasing function of ε and this relationship does not depend on freshwater

  20. Greenhouse gas (N2O emission from Portuguese estuaries

    Directory of Open Access Journals (Sweden)

    Célia Gonçalves

    2014-07-01

    Tagus, Minho and Lima estuaries are source of N2O to the atmosphere. Particularly, in Lima estuary anthropogenic N input seems to play an important role on N2O emission. However, in a global perspective N2O attained emissions represent a reduced fraction (2O yr-1, Barnes and Upstill-Goddard, 2011. Values are comparable with those registered in some Portuguese estuaries and other European less eutrophic estuaries. However, it is known that higher N2O emissions in estuaries may occur during winter and spring (Sun et al., 2014. Thus, these systems may represent on an annual basis a larger source of N2O, which can only be clarified in future studies. Only a full comprehension of the global estuarine nitrogen cycle will provide an efficient basis of scientific knowledge for sustainably management of such ecosystems and ultimately reduce N2O emissions.

  1. Soroepidemiologia da doença de Newcastle em plantéis de avestruzes dos Estados da Bahia e de São Paulo Serologic occurrence of Newcastle disease in ostriches raised in Bahia and São Paulo

    Directory of Open Access Journals (Sweden)

    Lia Muniz Barretto Fernandes

    2010-02-01

    Full Text Available Estudos sorológicos em Avestruzes (Struthio camelus são ferramentas úteis para analisar os riscos relacionados à Doença de Newcastle nesses plantéis e à avicultura nacional. No presente estudo, amostras de sangue foram obtidas de avestruzes de ambos os sexos, de diferentes faixas etárias e sem apresentação de sintomatologia clínica, criadas nos Estados da Bahia e de São Paulo com o objetivo de avaliar a presença de anticorpos contra o vírus da Doença de Newcastle por meio de ELISA indireto. Foram testadas 339 amostras provenientes do Estado da Bahia e 105 amostras do Estado de São Paulo. Apesar de os proprietários afirmarem que não foi utilizada vacina em seus animais, foi verificada positividade na Bahia de 17,9% e de 4,7% em São Paulo, em avestruzes, sugerindo contato com vírus vacinal ou de campo.Serological studies in ostriches (Struthio camelus are important tools to assess the risk of Newcastle disease in these herds and to the national poultry industry. In the present study blood samples were obtained from male and female ostriches without symptoms of the disease, raised in Bahia and São Paulo in order to evaluate the presence of antibodies against Newcastle disease virus using an indirect ELISA. There were collected 339 samples in Bahia and 105 samples in São Paulo. Although the owners guarantee that animals were not vaccinated, it was verified the presence 17,9% positives in Bahia and 4,7% in São Paulo, suggesting contact with vaccinal or field strain.

  2. Insectos acuáticos y calidad del agua en la cuenca y embalse del río Peñas Blancas, Costa Rica

    Directory of Open Access Journals (Sweden)

    Meyer Guevara Mora

    2011-06-01

    Full Text Available La población de insectos acuáticos y la calidad del agua fueron caracterizadas tomando en cuenta las alteraciones humanas y naturales en el área de estudio. Durante los muestreos mensuales, el pH, OD, temperatura, nivel del agua, DBO, PO4 y NO3 fueron medidos. Los índices biológicos (abundancia, riqueza de especies y el BMWP-CR se evaluaron para determinar la calidad del agua. No se detectaron relaciones entre las variables ambientales y los insectos acuáticos, pero las diferencias espaciales y temporales en la abundancia y riqueza fueron asociadas con las crecidas del río (temporal y a la presencia del embalse Peñas Blancas (espacial. En el futuro las investigaciones en la cuenca Peñas Blancas deben de ser dirigidas a determinar la magnitud de la influencia de los caudales, liberación de sedimentos y la posible degradación de la calidad del agua por efluentes de aguas servidas que se lleguen a ubicar en la cuenca.Aquatic insects and water quality in Peñas Blancas watershed and reservoir. The aquatic insects have been used to evaluate water quality of aquatic environments. The population of aquatic insects and the water quality of the area were characterized according to the natural and human alterations present in the study site. During the monthly-survey, pH, DO, temperature, water level, DBO, PO4 and NO3 were measured. Biological indexes (abundance, species richness and the BMWP-CR were used to evaluate the water quality. No relation between environmental and aquatic insects was detected. Temporal and spatial differences attributed to the flow events (temporal and the presence of Peñas Blancas reservoir (spatial. In the future, the investigations in Peñas Blancas watershed need to be focused on determining the real influence of the flows, sediment release and the possible water quality degradation because of agriculture activities. Rev. Biol. Trop. 59 (2: 635-654. Epub 2011 June 01.

  3. Inspection of non-piggable pipelines at PETROBRAS-UN Bahia; Inspecao de dutos nao-pigaveis na PETROBRAS-UN Bahia

    Energy Technology Data Exchange (ETDEWEB)

    Alves, Luis F.C.; Lopes, Paulo R. [PETROBRAS, Salvador, BA (Brazil). Unidade de Negocios da Bahia

    2005-07-01

    PETROBRAS has made a huge effort to inspect and rehabilitate its pipeline net, mainly over the past 10 years. Currently, E and P inspection teams are being challenged to find feasible solutions for the inspection of non-piggable pipelines, so named because they have unsuitable geometry and/or operating conditions for usual in-line inspections. Inside this pipeline category, flow lines, injection and distribution lines and even non-metallic pipelines may be highlighted. This paper presents the results of tests and developments of new inspection tools for the inspection of non piggable pipelines, future tests to be performed in PETROBRAS/E and P Bahia (UN-BA) and some inspection cases in which the operating conditions hinder the run of smart pigs. (author)

  4. A new species of Chilicola from Bahia, Brazil (Hymenoptera, Colletidae, with a key to the species of the megalostigma group

    Directory of Open Access Journals (Sweden)

    Favizia Oliveira

    2011-12-01

    Full Text Available The bee genus Chilicola Spinola (Xeromelissinae is recorded from the State of Bahia, Brazil for the first time, based on a new species of the megalostigma group of the subgenus Hylaeosoma Ashmead. Chilicola (Hylaeosoma kevani sp. n. is described and figured from males collected in Wesceslau Guimarães, Bahia. The species can be distinguished on the basis of coloration, size, integumental sculpturing, and structure of the hidden metasomal sterna and genitalia. A revised key to the species of the megalostigma group is provided.

  5. Novas ocorrências de hepáticas (Marchantiophyta para o estado da Bahia, Brasil New records of liverworts (Marchantiophyta from Bahia State, Brazil

    Directory of Open Access Journals (Sweden)

    Emilia de Brito Valente

    2006-03-01

    Full Text Available Na Serra da Jibóia, foram registradas 13 espécies de novas ocorrências, sendo oito para a região Nordeste: Bazzania aurescens Spruce, Calypogeia peruviana Nees & Mont., Cephalozia crassifolia (Lindenb. & Gottsche Fulford, Lepidozia cupressina (Sw. Lindenb., Pallavicinia lyellii (Hook. S.F. Gray, Plagiochilla diversifolia Lindenb. & Gottsche, Radula kegelli Gottsche ex Steph. e Riccardia fucoidea (Sw. Schiffin., e cinco espécies referidas pela primeira vez para o Estado: Metzgeria albinea Spruce, Plagiochila gymnocalycina (Lehm. & Lindenb. Mont., P. simplex (Sw. Lindenb., Riccardia amazonica (Spruce S.W. Arnell e Symphyogyna aspera Steph. Para cada espécie são fornecidos comentários taxonômicos, ecológicos e distribuição geográfica mundial e no Brasil, além de indicação de literatura contendo descrição e ilustração. Foram realizadas ilustrações para algumas espécies.In Serra da Jibóia were recorded 13 species of new ocurrence wich are eight species from region Northeastern: Bazzania aurescens Spruce, Calypogeia peruviana Nees & Mont., Cephalozia crassifolia (Lindenb. & Gottsche Fulford, Lepidozia cupressina (Sw. Lindenb., Pallavicinia lyellii (Hook. S.F. Gray, Plagiochilla diversifolia Lindenb. & Gottsche, Radula kegelli Gottsche ex Steph. and Riccardia fucoidea (Sw. Schiffin., and five are recorded for the first time from Bahia, State: Metzgeria albinea Spruce, Plagiochila gymnocalycina (Lehm. & Lindenb. Mont., P. simplex (Sw. Lindenb., Riccardia amazonica (Spruce S.W. Arnell and Symphyogyna aspera Steph. from Bahia, State. For each specie are provided taxonomics and ecological comments, geographical general and in Brazil distribution, and indication of literature with description and ilustration. Some species were ilustrated.

  6. A expulsão dos jesuítas da Bahia: aspectos econômicos The banishment of Jesuits from Bahia: economic aspects

    Directory of Open Access Journals (Sweden)

    Fabricio Lyrio Santos

    2008-06-01

    Full Text Available O presente artigo aborda a expulsão dos jesuítas da Bahia, enfocando o confisco do seu patrimônio e a venda de suas principais propriedades entre os anos de 1758 e 1763. Em meio à crise enfrentada pela Companhia de Jesus em Portugal na década de 1750, a questão de seu expressivo patrimônio e de sua suposta riqueza mostrou-se fundamental. Ela não se dissocia, no entanto, do amplo conjunto de medidas que configuraram uma verdadeira reforma política do Estado português na segunda metade do século XVIII, a partir da qual as ordens religiosas e a Igreja foram levadas a assumir um novo papel na esfera pública e no corpo político do reino.This article analyzes the expulsion of Jesuits from Bahia, focusing mainly upon the confiscation of their patrimony and the sale of their main properties between 1758 and 1763. Because of the crisis faced by the Society of Jesus in Portugal during the 1750's, the question of its expressive patrimony and supposed richness proved to be a key issue. However, the matter was not dissociated from the ample spectrum of measures that configured a true political reform of the Portuguese state in the second half of the 18th century. From that time on, the religious orders and the Church assumed a new role in the public sphere and in the political body of the reign.

  7. Recovery of different waste vegetable oils for biodiesel production: a pilot experience in Bahia State, Brazil.

    Science.gov (United States)

    Torres, Ednildo Andrade; Cerqueira, Gilberto S; Tiago, M Ferrer; Quintella, Cristina M; Raboni, Massimo; Torretta, Vincenzo; Urbini, Giordano

    2013-12-01

    In Brazil, and mainly in the State of Bahia, crude vegetable oils are widely used in the preparation of food. Street stalls, restaurants and canteens make a great use of palm oil and soybean oil. There is also some use of castor oil, which is widely cultivated in the Sertão Region (within the State of Bahia), and widely applied in industry. This massive use in food preparation leads to a huge amount of waste oil of different types, which needs either to be properly disposed of, or recovered. At the Laboratorio Energia e Gas-LEN (Energy & Gas lab.) of the Universidade Federal da Bahia, a cycle of experiments were carried out to evaluate the recovery of waste oils for biodiesel production. The experiences were carried out on a laboratory scale and, in a semi-industrial pilot plant using waste oils of different qualities. In the transesterification process, applied waste vegetable oils were reacted with methanol with the support of a basic catalyst, such as NaOH or KOH. The conversion rate settled at between 81% and 85% (in weight). The most suitable molar ratio of waste oils to alcohol was 1:6, and the amount of catalyst required was 0.5% (of the weight of the incoming oil), in the case of NaOH, and 1%, in case of KOH. The quality of the biodiesel produced was tested to determine the final product quality. The parameters analyzed were the acid value, kinematic viscosity, monoglycerides, diglycerides, triglycerides, free glycerine, total glycerine, clearness; the conversion yield of the process was also evaluated. Copyright © 2013 Elsevier Ltd. All rights reserved.

  8. MEASUREMENT THE LEVELS OF LITERACY IN THE NORTHEAST REGION OF BAHIA (1857-1878

    Directory of Open Access Journals (Sweden)

    Zenaide de Oliveira Novais Carneiro

    2015-12-01

    Full Text Available In this paper we analyze, in an exploratory fashion, ecclesiastical and parish records of land ownership, and municipality council notebooks from three localities in the Northeast region of Bahia: Bom Conselho (1857- 1859, Tucano (1865-1869 and Itapicuru (1875-1878, opposing the occurrence of alphabetical signatures or the delegation of signatures with the variables “geographic origin” and “sex” of those involved in the documentation, in order to measure the levels of literacy in this region of Bahia in the nineteenth century. In order to contribute with the process of diffusion of writing practices in the bahian rural society in the threshold of the non census period , by the critical application of what is called “method of the computation of signatures” to documental sources produced by the Law of Lands (1850. The results show that the ability of that type of proprietors in the documentation is relatively high in the cities we´ve investigated: Itapicuru, 86,36%, Tucano, 50,80%, and Bom Conselho, 45,91%. This is a different result if we´re comparing to the remaining population shown in the Census of 1872, once it seems to indicate a specific group, with ownerships, representing a specialization of writing ability and, also, texts mostly written by men (64,08%. Those sources include part of the rural population, specifically the proprietors of lands, and offer an approximate census survey of the ability to write signatures in the context of the regulation of lands. The main objective is to contribute with the history of the Portuguese language in the inland of Bahia, through one of the ways proposed by Houaiss (1985, the penetration of the written language in Brazil.

  9. PHASE ANALYSES OF URANIUM-BEARING MINERALS FROM THE HIGH GRADE ORE, NOPAL I, PENA BLANCA, MEXICO

    Energy Technology Data Exchange (ETDEWEB)

    M. Ren; P. Goodell; A. Kelts; E.Y. Anthony; M. Fayek; C. Fan; C. Beshears

    2005-07-11

    The Nopal I uranium deposit is located in the Pena Blanca district, approximately 40 miles north of Chihuahua City, Mexico. The deposit was formed by hydrothermal processes within the fracture zone of welded silicic volcanic tuff. The ages of volcanic formations are between 35 to 44 m.y. and there was secondary silicification of most of the formations. After the formation of at least part of the uranium deposit, the ore body was uplifted above the water table and is presently exposed at the surface. Detailed petrographic characterization, electron microprobe backscatter electron (BSE) imagery, and selected x-ray maps for the samples from Nopal I high-grade ore document different uranium phases in the ore. There are at least two stages of uranium precipitation. A small amount of uraninite is encapsulated in silica. Hexavalent uranium may also have been a primary precipitant. The uranium phases were precipitated along cleavages of feldspars, and along fractures in the tuff. Energy dispersive spectrometer data and x-ray maps suggest that the major uranium phases are uranophane and weeksite. Substitutions of Ca and K occur in both phases, implying that conditions were variable during the mineralization/alteration process, and that compositions of the original minerals have a major influence on later stage alteration. Continued study is needed to fully characterize uranium behavior in these semi-arid to arid conditions.

  10. Prototipo de monitoreo y alarma para la detección de heladas blancas en sectores rurales de Sogamoso

    Directory of Open Access Journals (Sweden)

    Willmar Arbey Suarez- Rodrígez

    2018-01-01

    Full Text Available El presente artículo muestra el diseño de un prototipo de monitoreo y alarma que permite la detección de heladas blancas y sirve de base para el desarrollo de un prototipo que posibilite la detección y predicción de heladas negras. El dispositivo, muestra las variables atmosféricas de temperatura y humedad, las comunica a un servidor local (Broker mediante WiFi y el protocolo MQTT, éste a su vez retransmite la información útil a otros dispositivos finales, como celulares y computadoras. El sistema es capaz de alertar mediante una alarma y permitir la comunicación de estos eventos a los diferentes dispositivos finales. Para lograr ésto, fue necesario seleccionar los dispositivos, tecnologías y protocolos convenientes, realizar un diseño y validarlo por medio de la emulación de las condiciones de temperatura y humedad adecuadas.

  11. The energy balance on the surface of a tropical glacier tongue. Investigations on glacier Artesonraju, Cordillera Blanca, Perú.

    Science.gov (United States)

    Juen, I.; Mölg, T.; Wagnon, P.; Cullen, N. J.; Kaser, G.

    2006-12-01

    The Cordillera Blanca in Perú is situated in the Outer Tropics spanning from 8 to 10 ° South. Solar incidence and air temperature show only minor seasonal variations whereas precipitation occurs mainly from October to April. An energy balance station was installed on the tongue of glacier Artesonraju (4850 m a.s.l.) in March 2004. In this study each component of the energy balance on the glacier surface is analysed separately over a full year, covering one dry and one wet season. During the dry season glacier melt at the glacier tongue is app. 0.5 m we per month. In the wet season glacier melt is twice as much with 1 m we per month. This is due to higher energy fluxes and decreased sublimation during the wet season. With an energy balance model that has already been proved under tropical climate conditions (Mölg and Hardy, 2004) each energy flux is changed individually to evaluate the change in the amount of glacier melt. First results indicate that a change in humidity related variables affects glacier melt very differently in the dry and wet season, whereas a change in air temperature changes glacier melt more constantly throughout the year.

  12. The energy balance of tropical Glaciar Artesonraju, Cordillera Blanca, Perú - AWS-measurements and numerical modeling

    Science.gov (United States)

    Galos, S.; Mölg, T.; MacDonell, S.; Großhauser, M.; Marzeion, B.

    2012-04-01

    Like in most regions of the world, tropical glaciers in the Peruvian Andes have experienced considerable mass loss during the last decades. In order to better understand and correctly interpret the ongoing glacier changes in this region, we need to examine the driving processes behind these changes. Therefore we installed several automatic weather stations (AWS) in the Cordillera Blanca mountain range. Two of these stations are situated in the ablation area of Glaciar Shallap and Glaciar Artesonraju, while four other stations were established in the vicinity of the two glaciers. The resulting eight year record of meteorological data is analyzed and finally used as input for a physically based numerical energy and mass balance model, which in a first step was applied to the ablation zone of Glaciar Artesonraju (8.96° S / 77.63° W). In July 2010, eddy covariance measurements were carried out on the glacier surface. The resulting data was used to calibrate the parametrization scheme for the turbulent fluxes of sensible and latent heat. Finally the model output was validated against ablation data from a sonic ranger and from single stake ablation measurements. The model results were interpreted with special respect to the seasonal fluctuation in atmospheric moisture (tropical wet / dry season).

  13. A geologic and geophysic study of the Sierra de Pena Blanca, in the state of Chihuahua, Mexico

    International Nuclear Information System (INIS)

    Lopez S, F.A.

    1976-01-01

    Within the sistematic aerial exploration program realized by the Instituto Nacional de Energia Nuclear, an aeroradiometric study was carried out in the zone which includes Sierra de Pena Blanca. This study took into consideration the former and present geological investigations and compromised the sierra together with the bordering valleys. The main objective consists in the localization of areas presenting favorable conditions for the existence of uranium isotopes minerlization, in order to determine a mineralized body or ore deposit. For that purpose the area was explored with an airplane to which a differential gamma rays spectrometer was adapted, this spectrometer will show us clearly the integration of the number of radiations which fall into the detectors obtaining this way a valuable information about the radiometric anomalous sites of the studied zone and also about the existence of bismuth, thallium and the abundant potassium of the igneous rocks. These anomalies are under the stage of ground verification, this stage includes a superficial study and the study of the underlying rocks through drilling, radiometric logs and chemical analysis of the samples. In fact, through this method we can obtain very truthful data. (author)

  14. INOCULACIÓN IN VITRO DE LA ROYA BLANCA (Puccinia horiana HENNINGS EN CRISANTEMO (Dendranthema grandiflora TZVELEV

    Directory of Open Access Journals (Sweden)

    C\\u00E9sar Vences-Contreras

    2008-01-01

    Full Text Available El presente estudio tuvo como finalidad el desarrollar la técnica de inoculación in vitro de la roya blanca, con el objeto de ahorrar tiempo y espacio en la caracterización de los distintos cultivares de crisantemo respecto al grado de susceptibilidad o resistencia a este patógeno. En Tenancingo, Estado de México, en el periodo 2004-2005 se colectaron hojas de crisantemo que presentaban daños por la enfermedad, se desinfectaron para posteriormente inocular las pústulas sobre plantas creciendo bajo condiciones in vitro. El recipiente de cultivo se mantuvo a una humedad relativa alrededor del 95% y temperaturas entre los 13 y 27 ºC, bajo condiciones de luz y oscuridad. Los daños por la enfermedad se manifestaron a los 20 días después de la inoculación. Los tratamientos a 17 ºC y oscuridad generaron un mayor número de pústulas (18,7. El diámetro de las pústulas fluctuó entre los 0,71 mm (tratamientos con 17 ºC y luz a los 1,79 mm en los tratamientos con 19 ºC y bajo oscuridad.

  15. Estudio histológico del sistema digestivo en diferentes estadios de desarrollo de la cachama blanca (Piaractus brachypomus

    Directory of Open Access Journals (Sweden)

    Miguel Ángel Mendoza R.

    2013-06-01

    Full Text Available La cachama blanca (Piaractus brachypomus es la segunda fuente de producción piscícola en Colombia, después de la tilapia roja (Oreochomi ssp. y antes de la trucha arcoíris (Oncorhynchus mykiss. Se destaca, además, como una de las especies con mayor potencial productivo en el país. Se realizó el estudio histológico del sistema digestivo de la Piaractus brachypomus a fin determinar la morfología normal en diferentes estadios de desarrollo. Para ello se clasificaron los animales según la edad, el tamaño y el peso en ovas embrionadas, larvas con saco vitelino, alevinos después de reabsorción de saco vitelino, juveniles (3-5 cm, 5-7 cm, 10 cm, 15 cm y adultos (300 g. La fijación de los tejidos se realizó en formaldehído al 3,7 % y se describió microscópicamente cavidad bucal, faringe, esófago, estómago, ciegos pilóricos, intestinos y las glándulas anexas, hígado y páncreas. Por último, se describió macroscópicamente la organización anatómica de este sistema.

  16. Physicochemical and biological cycles in a tide dominated, nitrogen-polluted temperate estuary

    OpenAIRE

    Wafar, M.V.M.; Le Corre, P.; Birrien, J.L.

    1988-01-01

    Spatio-temporal variations in the physicochemical and biological parameters in the Morlaix estuary on the Brittany coast of France were studied. Hydrographically, the estuary can be classified into 3 segments: the upper estuary where stratification always persists, the lower estuary where vertical homogeneity is permanent, and a middle estuary where there is a regular oscillation of stratification and homogeneity during every tidal cycle, stratification being associated with slack waters and ...

  17. Institutional and economic viability of Bahia State Gas Company: plan for carrying out

    International Nuclear Information System (INIS)

    Magalhaes Filho, F.A.; Abreu, G.O.F. de; Ribeiro, H.M.; Cabral, S.S.C.

    1988-01-01

    In formation of the Gas Distribution National Sector, the State of Bahia is singular by distribution facilities locally existent - presently operated by PETROBRAS, by the presence of big industrial consumers, as well as by the expressive natural gas reserves. In this context, besides the strictly technical-economical aspects that refer to the gas distribution, great importance is given for the political-institutional framework for the Gas Company set out into the entrepreneurial and public services ambience. As a result, the requirements for the Company setting up is put forward. (author)

  18. Microglanis pataxo, a new catfish from southern Bahia coastal rivers, northeastern Brazil (Siluriformes: Pseudopimelodidae)

    OpenAIRE

    Sarmento-Soares,Luisa M.; Martins-Pinheiro,Ronaldo F.; Aranda,Arion T.; Chamon,Carine C.

    2006-01-01

    A new pseudopimelodid catfish of the genus Microglanis, collected in small rivers at the lower and middle Peruípe, middle Jucuruçu and Cahy basins, in the southeastern coast of the Bahia state, is described. The new species has a comparatively high number of anal fin proximal radials, 12, shaped as thin tubes, the last one bearing a laminar extension; a pectoral fin spine with a bony point and with a smaller number of serrations on its posterior border; seven pleural ribs and a narrow head wi...

  19. TRAJETÓRIAS DE DESENVOLVIMENTO LOCAL E CAPITAL SOCIAL NA CIDADE PINTADAS – BAHIA - BRASIL

    OpenAIRE

    dos Santos Filho, Antonio Muniz

    2012-01-01

    Este artigo tem como objetivo discorrer acerca do papel do “Projeto Rede Pintadas” no fomento ao Desenvolvimento Local e a articulação comunitária do município de Pintadas – Bahia, com vista ao adensamento do Capital Social. Essas proposições são viabilizadas através da organização da sociedade civil institucionalizada no referido “Projeto”. Tomamos como parâmetro para análise, a adoção das estratégias organizacionais para o empoderamento, a gestão participativa e, consequentemente, o adensam...

  20. TRAJETÓRIAS DE DESENVOLVIMENTO LOCAL E CAPITAL SOCIAL NA CIDADE PINTADAS – BAHIA - BRASIL

    OpenAIRE

    dos Santos Filho, Antonio Muniz; Rios, Reuelio Marques

    2012-01-01

      Este artigo tem como objetivo discorrer acerca do papel do “Projeto Rede Pintadas” no fomento ao Desenvolvimento Local e a articulação comunitária do município de Pintadas – Bahia, com vista ao adensamento do Capital Social. Essas proposições são viabilizadas através da organização da sociedade civil institucionalizada no referido “Projeto”. Tomamos como parâmetro para análise, a adoção das estratégias organizacionais para o empoderamento, a gestão participativa e, consequentemente, o adens...

  1. STUDIES RELATED TO THE PRESENCE AFRICAN IN THE CULTURAL IDENTITY OF BAHIA HONDA

    Directory of Open Access Journals (Sweden)

    Silfredo Rodríguez-Basso

    2016-01-01

    Full Text Available The present article refers to a qualitative analysis of the main reference authors and works related to the studies about the presence of the African legacy in the cultural identity of Bahia Honda based on a continuing historical- cultural conception. This study has a systematized theoretical character and includes methods like the dialectic- materialistic and documental analysis. The results indicated a wide diffusion of information, the variety of disciplinary directions and also a lack of this kind of qualitative evaluation in the previous studies carried out.

  2. Characterization of a clay from Vitoria da Conquista, Bahia, Brazil, by thermal analysis

    International Nuclear Information System (INIS)

    Oliveira, O.M.; Zandonadi, A.R.; Martins, M.V. Surmani; Carrio, J.A.G.; Munhoz Junior, A.H.

    2010-01-01

    Kaolinitic clays are vastly used in ceramic industry. Light coloration burned clays are very useful in the coatings production because of their aesthetic. In this work clay material from Vitoria da Conquista (south-west Bahia, Brazil) was characterized by various techniques. Differential Scanning Calorimetry (DSC) shows a kaolinite characteristic curve with an endothermic peak at 492 deg C, which corresponds to the kaolinite - metakaolinite transformation. Transformation alpha to beta quartz is characterized by a 573 deg C peak. The samples were also characterized by water absorption and x rays powder diffraction. The 1100 deg C burned samples were tested by rupture tension with acceptable results. (author)

  3. Condições atuais da esquistossomose no "Dique do Tororó" em Salvador, Bahia

    Directory of Open Access Journals (Sweden)

    Ruth B. Amorim

    1976-06-01

    Full Text Available Os Autores apresentam os resultados de observações realizadas entre os anos de 1971 a 1974 sobre a incidência humana da esquistosomose no Dique do Tororó, em Salvador, Bahia, após alí terem sido realizadas melhorias pela engenhària sanitária e medidas de combate biológico ao caramujo vetor pelo uso de peixes predadores. Comparando com os resultados obtidos por outros Autores em 1960, concluem que o Dique do Tororó não mais representa uma importante fonte de propagação da esquistosomose.

  4. Productivity and adaptation of Pinus in the north litoral of Bahia

    International Nuclear Information System (INIS)

    Barros Ferraz, E.S. de; Rezende, M.A.

    1986-01-01

    The productivity and climatic adaptation of two species of Pinus in the north litoral of Bahia State has been studied through the variability of wood density in a comercial plantation. The gamma-ray attenuation method of the 100 mCi 241-Am source, 59,6 KeV, was used for density variability analysis. The results show that Pinus caribaea hondurensis is better adapted to the region than Pinus caribaea caribaea, with a superior mean productivity of 26% at 8 years. (Author) [pt

  5. Garoto-propaganda Casas Bahia: configuração e estratégia

    OpenAIRE

    João, Aléxon Gabriel

    2015-01-01

    O fio condutor da análise dos anúncios é a construção discursiva, passando pelos princípios norteadores de Bakhtin que entende o texto como um suporte material que dialoga em diferentes níveis com o consumidor. Além do teórico russo, foram incorporados os conceitos de Eliseo Verón, Patrick Charaudeau e Paolo Fabbri. No caso do Garoto-propaganda Casas Bahia, a forma, o estilo e a maneira de anunciar os produtos da empresa parecem apontar para estratégias e movimentos muito peculiares que favor...

  6. Environmental Flow for Sungai Johor Estuary

    Science.gov (United States)

    Adilah, A. Kadir; Zulkifli, Yusop; Zainura, Z. Noor; Bakhiah, Baharim N.

    2018-03-01

    Sungai Johor estuary is a vital water body in the south of Johor and greatly affects the water quality in the Johor Straits. In the development of the hydrodynamic and water quality models for Sungai Johor estuary, the Environmental Fluid Dynamics Code (EFDC) model was selected. In this application, the EFDC hydrodynamic model was configured to simulate time varying surface elevation, velocity, salinity, and water temperature. The EFDC water quality model was configured to simulate dissolved oxygen (DO), dissolved organic carbon (DOC), chemical oxygen demand (COD), ammoniacal nitrogen (NH3-N), nitrate nitrogen (NO3-N), phosphate (PO4), and Chlorophyll a. The hydrodynamic and water quality model calibration was performed utilizing a set of site specific data acquired in January 2008. The simulated water temperature, salinity and DO showed good and fairly good agreement with observations. The calculated correlation coefficients between computed and observed temperature and salinity were lower compared with the water level. Sensitivity analysis was performed on hydrodynamic and water quality models input parameters to quantify their impact on modeling results such as water surface elevation, salinity and dissolved oxygen concentration. It is anticipated and recommended that the development of this model be continued to synthesize additional field data into the modeling process.

  7. Mercury distribution in Douro estuary (Portugal)

    Energy Technology Data Exchange (ETDEWEB)

    Ramalhosa, E. [Department of Chemistry, University of Aveiro, 3810-193 Aveiro (Portugal); Pereira, E. [Department of Chemistry, University of Aveiro, 3810-193 Aveiro (Portugal)]. E-mail: eduper@dq.ua.pt; Vale, C. [National Institute for Agronomy and Fishery Research, IPIMAR, Avenida Brasilia, 1449-006 Lisboa (Portugal); Valega, M. [Department of Chemistry, University of Aveiro, 3810-193 Aveiro (Portugal); Monterroso, P. [Department of Chemistry, University of Aveiro, 3810-193 Aveiro (Portugal); Duarte, A.C. [Department of Chemistry, University of Aveiro, 3810-193 Aveiro (Portugal)

    2005-11-15

    Determinations of dissolved reactive and total dissolved mercury, particulate and sedimentary mercury, dissolved organic carbon (DOC), particulate organic carbon (POC) and suspended particulate matter (SPM) have been made in the estuary of river Douro, in northern Portugal. The estuary was stratified by salinity along most of its length, it had low concentrations of SPM, typically <20 mg dm{sup -3}, and concentrations of DOC in the range <1.0-1.8 mg dm{sup -3}. The surface waters had a maximum dissolved concentration of reactive mercury of about 10 ng dm{sup -3}, whereas for the more saline bottom waters it was about 65 ng dm{sup -3}. The surface waters had maximum concentrations of total suspended particulate mercury of {approx}7 {mu}g g{sup -1} and the bottom waters were always <1 {mu}g g{sup -1}. Concentrations of mercury in sediments was low and in the range from 0.06 to 0.18 {mu}g g{sup -1}. The transport of mercury in surface waters was mainly associated with organic-rich particulate matter, while in bottom waters the dissolved phase transport of mercury is more important. Lower particulate organic matter, formation of chlorocomplexes in more saline waters and eventually the presence of colloids appear to explain the difference of mercury partitioning in Douro estuarine waters.

  8. Scavenging rate ecoassay: a potential indicator of estuary condition.

    Science.gov (United States)

    Porter, Augustine G; Scanes, Peter R

    2015-01-01

    Monitoring of estuary condition is essential due to the highly productive and often intensely impacted nature of these ecosystems. Assessment of the physico-chemical condition of estuaries is expensive and difficult due to naturally fluctuating water quality and biota. Assessing the vigour of ecosystem processes is an alternative method with potential to overcome much of the variability associated with physico-chemical measures. Indicators of estuary condition should have small spatial and temporal variability, have a predictable response to perturbation and be ecologically relevant. Here, we present tests of the first criterion, the spatio-temporal variability of a potential ecoassay measuring the rate of scavenging in estuaries. We hypothesised that the proposed scavenging ecoassay would not vary significantly among A) sites in an estuary, B) trips separated by weeks, or C) days in a trip. Because not all habitats are present in all estuaries, this test was undertaken in two habitats. When conducted over bare substrate there were occasional significant differences, but no discernible patterns, within levels of the experiment. When conducted over vegetated substrate, days within a trip did not vary significantly, but later trips experienced greater scavenging. This scavenging ecoassay shows potential as a tool for assessing the condition of estuarine ecosystems, and further exploration of this protocol is warranted by implementation in estuaries across a gradient of anthropogenic stress.

  9. Cyanobacteria and macroalgae in ecosystem of the Neva estuary

    Directory of Open Access Journals (Sweden)

    Nikulina V. N.

    2011-07-01

    Full Text Available The Baltic Sea and Neva estuary are plagued by coastal eutrophication. In order to estimate the scale of the problem, quantitative estimates of phytoplankton and macroalgal mats were determined in the Neva estuary. Long-term monitoring (1982–2009 of phytoplankton showed changes in its species composition and abundance. Summer phytoplankton biomass increased significantly in the 1990s, with concomitant changes in species composition, despite a decline of nutrients in the Neva estuary. The cyanobacteria Planktothrix agardhii became a dominant species. The summer biomass of phytoplankton reached a maximum of 5.2 ± 0.4 mg·L-1 in 2002–2004. Monitoring of macroalgal community in the coastal area of the Neva estuary from 2002 to 2009 showed the dominance of the filamentous green alga Cladophora glomerata in the phytobenthos. Average biomass of macroalgae in inner and outer estuary differed significantly at 132 ± 29 and 310 ± 67 g DW·m-2, respectively. This study showed, that fluctuations in macroalgal biomass reflected human influence on estuary, although it was less sensitive to human impact than the phytoplankton community. Thus qualitative and quantitative characteristics of phytoplankton and macroalgal blooms can indicate anthropogenic influence on the ecosystem, and help to better manage the Neva estuary.

  10. Waterfowl migration and distribution in North West estuaries. V. 1

    International Nuclear Information System (INIS)

    Clark, N.A.; Kirby, J.S.; Langston, R.H.W.; Donald, P.; Mawdesley, T.; Evans, J.

    1990-12-01

    Waterfowl populations may be affected by proposed tidal barrage across the Mersey. This study had three objectives:-(1) to evaluate the patterns of usage of the intertidal flats of the Mersey estuary by waders and wildfowl and to establish which are the preferred areas; (2) to identify the places of origin and movement patterns of the populations of waders and wildfowl that visit the Mersey Estuary; and (3) to evaluate evidence regarding the capacity of British estuaries to absorb waders and wildfowl populations which might be displaced by a Mersey Barrage. The text and tables and results only are presented in Volume 1. (author)

  11. Perspectives for distributed generation of electricity in the States of Sao Paulo, Bahia and Mato Grosso; Perspectivas da geracao distribuida de eletricidade nos estados de Sao Paulo, Bahia e Mato Grosso

    Energy Technology Data Exchange (ETDEWEB)

    Bajay, Sergio Valdir; Leite, Alvaro Afonso Furtado [Universidade Estadual de Campinas (NIPE/UNICAMP), SP (Brazil). Nucleo Interdisciplinar de Planejamento Energetico], Email: bajay@fem.unicamp.br; Carvalho, Claudio Bezerra de [Universidade do Estado da Bahia (UNEB), Alagoinhas, BA (Brazil); Dorileo, Ivo Leandro [Universidade Federal do Mato Grosso (UFMT), Cuiaba, MT (Brazil). Nucleo Interdisciplinar de Estudos em Planejamento Energetico

    2006-07-01

    This paper addresses the concept of distributed generation of electricity and the current support policies for such kind of generation in the country. Their diffusion perspectives in the States of Sao Paulo, Bahia and Mato Grosso are discussed. The more promising technologies and new policies for them are pointed out. (author)

  12. Ingestão de resíduos antropogênicos por tartarugas marinhas no litoral norte do estado da Bahia, Brasil Anthropogenic debris ingestion by sea turtles in the northern coast of Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Gustavo Rodamilans Macedo

    2011-11-01

    Full Text Available Este trabalho descreve a presença de resíduos antropogênicos no trato digestório de tartarugas marinhas no Litoral Norte da Bahia, Brasil. Foram realizadas necropsias no trato digestório de 45 tartarugas marinhas encontradas mortas (Chelonia mydas n=36; Eretmochelys imbricata n=9, no período de janeiro de 2006 a outubro de 2007. Em 60% (27/45 das tartarugas necropsiadas foram encontrados resíduos, especialmente aqueles relacionados à atividade de pesca. Os resíduos encontravam-se ao longo de todo o trato gastrointestinal, com predominância no intestino grosso. A ingestão de resíduos pelas tartarugas marinhas do Litoral Norte da Bahia pode levar a debilidade e até mesmo provocar a morte destes animais.This study investigates the presence of anthropogenic debris in the digestive tract of sea turtles in the Northern Coast of Bahia, Brazil. Necropsies were performed on 45 turtles, 36 green turtles (Chelonia mydas and 9 hawksbills (Eretmochelys imbricata, found dead between january 2006 and october 2007. Debris was found in 60% of the animals, especially those related to fishing activities. Litter could be found throughout the entire gastrointestinal tract, but it was found predominantly in the large intestine (47.53%. The ingestion of debris by turtles from the Northern coast of Bahia may lead these animals to starvation, weakness and even death.

  13. Diatomeas planctónicas de cursos de agua: Cuenca del Río Piedra Blanca (Córdoba, Argentina Diatom communities in the highland water streams. Piedra Blanca River basin (Córdoba, Argentina

    Directory of Open Access Journals (Sweden)

    Ana Luján M. De Fabricius

    2005-12-01

    Full Text Available El presente trabajo se realizó en el arroyo El Chacay y en el río Las Albahacas desde la primavera de 1999 hasta la primavera de 2000. El objetivo de esta investigación fue comparar la composición y abundancia de la comunidad diatómica en ríos y arroyos serranos de la cuenca del río Piedra Blanca, durante un ciclo anual. En total, 121 taxa (especies, variedades y formas fueron registrados a partir del análisis taxonómico. El orden Pennales predominó en número de especies y porcentaje de frecuencia relativa. El género con mayor número de especies fue Navicula. El número de especies osciló entre un mínimo de 21 en invierno de 2000 en el río Las Albahacas (aguas arriba del balneario y un máximo de 49 en verano de 2000 en el arroyo El Chacay y en primavera de 2000 en el río Las Albahacas (aguas arriba del balneario, respectivamente. El mayor número de especies corresponde a los menores porcentajes de frecuencia. La densidad osciló entre 1 org.ml-1 en otoño de 2000 en el río Las Albahacas, aguas arriba del balneario y 1596,40 org.ml-1 registrados en primavera de 1999 en el arroyo El Chacay. Los parámetros fisicoquímicos y la composición de especies determinaron una mayor afinidad entre los sitios en la estación de primavera.The present work was developed in El Chacay Creek and Las Albahacas River from 1999 spring to 2000 spring. The aim of this investigation was to compare the composition and abundance of the diatom communities of a highland water stream and a river within the Piedra Blanca River basin, during an annual cycle. As a result of a taxonomic analysis a total of 121 taxa (species, varieties and forms were recorded. The Order Pennales predominated in number of species and relative frequency. The genus with the highest number of species was Navicula. The total number of species varied from a minimum of 21 in 2000 winter season in the Las Albahacas River (upstream riverside resort to a maximun of 49 in 2000 summer

  14. Drinking water: problems related to water supply in Bahía Blanca, Argentina Agua potable: problemas en el abastecimiento de la ciudad de Bahía Blanca, Argentina

    Directory of Open Access Journals (Sweden)

    Ricardo Echenique

    2006-12-01

    Full Text Available In April 2000, alterations in drinking water quality, such as turbidity and odors similar to those of organochloride pesticides, were detected at Bahía Blanca (Argentina. This fact was associated to reports of dermic reactions and respiratory problems in the population. Samples drawn from Paso de las Piedras reservoir, two water treatment plants of at inlet and outlet points and at several particular houses were analyzed. Total phytoplankton in the reservoir varied between 49440 and 84832 cells.ml-1, while dominant species was, Anabaena circinalis. Efficiency to remove microorganisms (ER by the treatment plants considering cell number of total phytoplankton was analyzed. Bacteriological analysis, qualitative and quantitative studies of phytoplankton, pesticides, THM (trihalomethanes and BTEX (benzene, toluene, ethylbenzene and xylene analysis were carried out in samples of domestic supply and in the treatment plants. Even though samples were bacteriological potable, Anabaena circinalis and Microcystis aeruginosa algae were found at high concentrations in some cases. No pesticides were detected. THM and BTEX were below guideline values into recommendations for drinking water. Geosmin was responsible for detected odors. Besides, Copaene, another volatile metabolite, which on account in its structure could be considered a Geosmin precursor, was also detected. In Argentina, this was the first report of Cyanobacteria presence in drinking water.En abril de 2000, en Bahía Blanca (Argentina, se detectaron alteraciones en el agua de bebida, turbidez y olor semejante a "Gamexane". Esto coincidió con la aparición de problemas dérmicos y respiratorios en la población. Para determinar el origen del problema, se analizaron muestras, tomadas en el embalse Paso de las Piedras, en las plantas potabilizadoras y en varios domicilios particulares. En el embalse, la densidad celular del fitoplancton, fluctuó entre 49440 y 84832 cél/ml-1, muy por encima de

  15. Salt Intrusion in the Tweed Estuary

    Science.gov (United States)

    Uncles, R. J.; Stephens, J. A.

    1996-09-01

    Results are presented from a 2-week field programme in the Tweed Estuary, U.K. Maximum values of the empirically based Estuarine Richardson Number, Ri E, occurred during neap tides, and minimum values occurred during spring tides. Estimated values of Ri Evaried between 0·3 and 2·3, suggesting the occurrence of partially mixed to stratified conditions, depending on tidal state and freshwater inflow. These relatively large values of Ri Ewere consistent with both observed strong salinity stratification and large salt fluxes due to vertical shear transport. Low values (0·5) values in the halocline. A velocity maximum occurred within the halocline during the early flood. Wave-like spatial oscillations of the halocline occurred on the ebb. The oscillation troughs were situated above deep holes located just down-estuary of the rail and old road bridges. There was an indication that the constricted flow between the bridges' arches resulted in enhanced mixing of near-surface waters and a thickening of the halocline. It is also possible that these wave-like structures were stationary, near-critical internal lee waves, triggered by the deep holes. Trapping of high-salinity waters occurred on the ebb. Saline pools were isolated within a deep hole or deeper section of bed by the falling halocline. When the salt wedge moved further down-estuary, the ' trapped ' waters were subjected to strongly ebbing, overlying freshwater, and were subsequently entrained and flushed. The salinity intrusion was a strong function of spring-neap tidal state and a weaker function of freshwater inflow. The estimated salinity intrusion varied from about 4·7 to 7·6 km during the fieldwork period. The strong dependence on tidal range followed from the comparable lengths of the tidal excursion and salinity intrusion. Long excursion lengths were also partly responsible for the short residence (or flushing) times and their strong dependence on spring-neap tidal state. For typical summer freshwater

  16. Estudantes indígenas no contexto universitário da Universidade Federal da Bahia

    Directory of Open Access Journals (Sweden)

    Ana Cláudia Gomes de Souza

    2016-04-01

    Full Text Available Na pesquisa que desenvolvo no âmbito do doutorado em antropologia da Universidade Federal da Bahia, tenho acompanhado os percursos acadêmicos de estudantes indígenas que ingressaram, desde 2005, no programa de ações afirmativas dessa Universidade. Trata-se de jovens na faixa etária entre 18 - 29 anos, de diversas etnias do estado da Bahia, que ingressaram nas áreas de direito, letras, artes, ciências sociais, engenharias, economia, enfermagem, medicina, comunicação e bacharelado interdisciplinar. Em todos os casos o estudante foi o primeiro membro da família a ingressar na universidade. O objetivo da pesquisa é perceber como essa experiência tem sido por eles significada e, simultaneamente, identificar as estratégias pessoais e comunitárias utilizadas para a adaptação no espaço universitário; as demandas de formação, por parte desses jovens e das suas comunidades de pertencimento; e as suas expectativas após a conclusão dos cursos. De modo geral, esses jovens estudantes destacam as dificuldades interpostas ao acesso e à permanência na universidade, assim como certas insuficiências das políticas institucionais de ações afirmativas voltadas para o ensino superior no Brasil.

  17. Trypanosoma cruzi strains from triatomine collected in Bahia and Rio Grande do Sul, Brazil

    Directory of Open Access Journals (Sweden)

    Aline Rimoldi Ribeiro

    2014-04-01

    Full Text Available OBJECTIVE Collection of triatomines in domestic, peridomestic and sylvatic environments in states of Bahia and Rio Grande do Sul, Northeastern and Southern Brazil respectively, and isolation of Trypanosoma cruzi strains. METHODS First, the captured triatomines were identified using insect identification keys, then their intestinal content was examined by abdominal compression, and the samples containing trypanosomatid forms were inoculated in LIT medium and Swiss mice. RESULTS Six triatomine species were collected in cities in Bahia, namely Panstrongylus geniculatus (01, Triatoma melanocephala (11, T. lenti (94, T. pseudomaculata (02, T. sherlocki (26 and T. sordida (460, and two in cities in Rio Grande do Sul, namely T. circummaculata (11 and T. rubrovaria (115. Out of the specimens examined, T. cruzi was isolated from 28 triatomine divided into four different species: T. melanocephala (one, T. lenti (one, T. rubrovaria (16 and T. sordida (10. Their index of natural infection by T. cruzi was 6.4%. CONCLUSIONS The isolation of T. cruzi strains from triatomines found in domestic and peridomestic areas shows the potential risk of transmission of Chagas disease in the studied cities. The maintenance of those T. cruzi strains in laboratory is intended to promote studies that facilitate the understanding of the parasite-vector-host relationship.

  18. The Prevalence of Metabolic Syndrome Among Soldiers of the Military Police of Bahia State, Brazil.

    Science.gov (United States)

    Filho, Romário Teixeira Braga; D'Oliveira, Argemiro

    2014-07-01

    The mortality rate of men is generally higher than that of women, irrespective of the age group. Currently, a key concern for health care professionals is the prevalence of risk factors associated with cardiovascular disease and metabolic syndrome. This study aimed at assessing the prevalence of individual risk factors for cardiovascular disease as well as the prevalence of metabolic syndrome among men serving in the Military Police Corps of the state of Bahia, Brazil. This service employs mostly men, and they are known to experience high levels of occupational stress and professional victimization. We conducted a cross-sectional study among military police soldiers (n = 452) who were candidates for a military police training course in Bahia, Brazil. All candidates who attended the selection process were evaluated according to the criteria of the National Cholesterol Education Program's Adult Panel III in order to assess the presence of medical disorders that could contribute to cardiovascular disease and metabolic syndrome. The authors identified a high prevalence of hypertension (55.76%), hypertriglyceridemia (50.85%), waist circumference of >102 cm (31.76%), low high-density lipoprotein cholesterol levels (30.46%), and impaired fasting glucose (28.15%) in our subjects. The overall prevalence of metabolic syndrome was 38.54%. The authors suggest that measures should be taken to ensure that military policemen receive continued medical care, both in their professional capacity and in their personal circumstances, and that attention be focused on intervention programs. © The Author(s) 2013.

  19. Lymnaea columella: two new Brazilian localities in the states of Amazonas and Bahia

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    W. Lobato Paraense

    1986-03-01

    Full Text Available The occurrence of Lymnaea columella is recorded in Tefé, Amazonas state, where it was found together with Drepanotrema anatinum, Physa marmorata and pomacea sp. L. columella was also collected in Salvador, Bahia state, at the dique do Tororó, an urban lake formely mentioned (as "lac Baril" by Moricand (1853 as a breeding-place of Biomphalaria glabrata, Drepanotrema cimex, D. depressissimum, Pomacea lineata, P. decussata and Ancylus moricandi. The four first-mentioned species, as well as physa cubensis and Hemisinus brasiliensis, were also collected now. This is the first record of a lymnaeid in the Northeastern region of Brazil.É registrada a ocorrência de Lymnaea columella em Tefé, Estado do Amazonas, onde foi encontrada juntamente com Physa marmorata e Pomacea sp. L. columella foi também coletada em Salvador, Estado da Bahia, no Dique do Tororó, lago urbano antes mencionado por Moricand (1853 como criadouro de Biomphalaria glabrata, Drepanotrema cimex, D. depressissimum, Pomacea lineata, P. decussata e Ancylus moricandi. As quatro primeiras espécies mencionadas, assim como Physa cubensis e Hemisinus brasiliensis, também foram agora coletadas. Este é o primeiro registro de um limneídeo na região Nordeste do Brasil

  20. Cerambycidae (Coleoptera do Museu de Zoologia da Universidade Estadual de Feira de Santana, Bahia

    Directory of Open Access Journals (Sweden)

    Ubirajara R. Martins

    2013-09-01

    Full Text Available Novas espécies em Cerambycinae são descritas do Brasil, Piauí: Compsibidion paragraphycum sp. nov. (Neoibidionini. Em Lamiinae, - do Piauí: Trichohippopsis vestita sp. nov. (Agapanthiini; Oncioderes piauiensis sp. nov. (Onciderini; Cotycicuiara caracolensis sp. nov. (Desmiphorini; Xenofrea peculiaris sp. nov. (Xenofreini; Mariliana bellula sp. nov. (Hemilophini; - da Paraíba: Ataxia arenaria sp. nov. (Pteropliini; Dadoychus atrus sp. nov. (Hemilophini. Novos registros em Cerambycinae para o Piauí: Methia longipennis Martins, 1997 (Methiini; Tropidion sipolisi (Gounelle, 1909, Compsibidion decoratum (Gounelle, 1909, Cycnidolon obliquum Martins, 1969 (Neoibidionini; - para o Ceará: Paranyssicus conspicillatus (Erichson, 1847 (Elaphidiini; Aglaoschema collorata (Napp, 1993 (Compsocerini; - para a Bahia: Stizocera phtisica Gounelle, 1909 (Elaphidiini. Novos registros em Lamiinae para o Piauí: Dolichosybra tubericollis Breuning, 1942 (Apomecynini; Ceiupaba lineata Martins & Galileo, 1998, Cicuiara striata (Bates, 1866, Desmiphora pallida Bates, 1874 (Desmiphorini; Nesozineus apharus Galileo & Martins, 1996, Psapharochrus nigrovittatus (Zajciw, 1969 (Acanthoderini; - para o Ceará: Trichohippopsis rufula Breuning, 1958 (Agapanthiini; Ataxia parva Galileo & Martins, 2011 (Pteropliini; Desmiphora cirrosa Erichson, 1847 (Desmiphorini; - para a Paraíba: Eudesmus rubefactus Bates, 1865 (Onciderini; Laraesima ochreoapicalis Breuning, 1973 (Compsosomatini; Psapharochrus itatiayensis (Melzer, 1935 (Acanthoderini; - para a Bahia: Brasiliosoma tibialis (Breuning, 1948 (Compsosomatini; Adesmus hemispilus (Germar, 1821 (Hemilophini.

  1. Hawksbill × loggerhead sea turtle hybrids at Bahia, Brazil: where do their offspring go?

    Directory of Open Access Journals (Sweden)

    Maira C. Proietti

    2014-02-01

    Full Text Available Hybridization between hawksbill (Eretmochelys imbricata and loggerhead (Caretta caretta breeding groups is unusually common in Bahia state, Brazil. Such hybridization is possible because hawksbill and loggerhead nesting activities overlap temporally and spatially along the coast of this state. Nevertheless, the destinations of their offspring are not yet known. This study is the first to identify immature hawksbill × loggerhead hybrids (n = 4 from this rookery by analyzing the mitochondrial DNA (mtDNA of 157 immature turtles morphologically identified as hawksbills. We also compare for the first time modeled dispersal patterns of hawksbill, loggerhead, and hybrid offspring considering hatching season and oceanic phase duration of turtles. Particle movements varied according to season, with a higher proportion of particles dispersing southwards throughout loggerhead and hybrid hatching seasons, and northwards during hawksbill season. Hybrids from Bahia were not present in important hawksbill feeding grounds of Brazil, being detected only at areas more common for loggerheads. The genetic and oceanographic findings of this work indicate that these immature hybrids, which are morphologically similar to hawksbills, could be adopting behavioral traits typical of loggerheads, such as feeding in temperate waters of the western South Atlantic. Understanding the distribution, ecology, and migrations of these hybrids is essential for the development of adequate conservation and management plans.

  2. ENRAIZAMENTO IN VITRO DE BROTOS DE JACARANDÁ-DA-BAHIA (DALBERGIA NIGRA VELLOZO

    Directory of Open Access Journals (Sweden)

    Aline Tintori Mantovani

    2017-02-01

    Full Text Available Resumo: A espécie Dalbergia nigra é conhecida popularmente como jacarandá-da-bahia. Devido ao seu destaque e importância econômica, a exploração para uso madeireiro e a pecuária acarretou devastação no seu ambiente natural o que a incluiu na lista de espécies da flora brasileira ameaçadas de extinção e apesar disso, pouco tem sido feito para a multiplicação desta espécie devido ao seu crescimento lento. A micropropagação é uma alternativa para obtenção de grande quantidade de mudas sadias em curto espaço de tempo. Objetivou-se neste estudo avaliar as condições mais favoráveis ao enraizamento de brotos in vitro, possibilitando a produção de plântulas viáveis. Foram utilizados meristemas apicais e cotiledonares de plântulas de jacarandá-da-bahia, cultivadas em condições assépticas nos tratamentos compostos por meio de cultura MS e concentrações de ANA (0 e 1 µM. O meio de cultura contendo 1 μM ANA após 30 dias de cultivo induziu a formação de raízes, apresentando melhores resultados.

  3. Pedro Ferreira, um escultor baiano desconhecido Pedro Ferreira, an unknown sculptor from Bahia

    Directory of Open Access Journals (Sweden)

    Maria Helena Ochi Flexor

    2008-12-01

    Full Text Available Este trabalho é o resultado do início de um estudo sobre o escultor Pedro Ferreira. Embora seja autor de obras importantes, passa quase desapercebido na historiografia da arte baiana. Trata-se de artista que pertence ao tempo em que o neoclassicismo se impunha à cultura Ocidental, porém, ainda restavam, na Bahia, as práticas do período barroco, em especial a cópia dos grandes mestres renascentistas. Pedro Ferreira foi um desses artistas e teve como principal inspirador Murillo, da escola espanhola.This work is the result of a beginning study about a sculptor Pedro Ferreira. Although he was author of important workmanships, he passes almost unknown in the bahian history of art. He was an artist who lives belongs a time when the neoclassicismo was imposed to the Occidental culture, but, still remained in Bahia, the practical ones of the baroque period, in special the copy of the great Renaissance masters. Pedro Ferreira was one of these artists and has inspired, as main artist, Murillo, of the Spanish school.

  4. Early signals of environmental and health impacts caused by uranium mining in Caetite, Bahia, Brazil

    International Nuclear Information System (INIS)

    Brito, Adelson S. de; Rego, Rita de Cassia Franco; Zucchi, Maria do Rosario; Navarro, Marcus V. Teixeira

    2011-01-01

    Uranium mining and processing at Lagoa Real (Bahia, Brazil) in the southwest of Bahia state started in the year 2000.The processing of uranium ore for obtaining U3O8 (yellowcake) is done today in the processing unit of the Brazilian Nuclear Industries INB located in the area of the same municipality above mentioned. The production capacity is 400 tons / year of U3O8, and the reserves in this region are estimated at 100.000 tons of uranium without any other associated minerals, enough to supply the demand for nuclear power plants Angra I and II for over 100 years. Since the granting of AOP (Permanent Operation Authorization) by CNEN (National Commission on Nuclear Energy) in the year 2009, there were some incidents at the facility, such as: solvents and liquid containing uranium overflow; pipes rupture, causing indiscriminate dispersion of toxic acids and other chemical agents; collapse of parts of the slope of the open pit. CNEN admitted in an official press release on April 1, 2011 that 'INB has no capacity to produce annual reports on environmental monitoring (unable to perform radiometric measurements, etc.). The last time a report was released happened in the year 2008. These reports are vital to the environmental impact assessment of the facility'. Another potential source of environmental and health negative impacts on the local population could be linked to radon emission. What are the levels of this important pollutant in the affected areas? (author)

  5. Early signals of environmental and health impacts caused by uranium mining in Caetite, Bahia, Brazil

    Energy Technology Data Exchange (ETDEWEB)

    Brito, Adelson S. de; Rego, Rita de Cassia Franco [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Medicina Preventiva. Programa de Pos-Graduacao em Saude, Ambiente e Trabalho; Zucchi, Maria do Rosario [Universidade Federal da Bahia (UFBA), Salvador, BA (Brazil). Dept. de Fisica da Terra. Lab. de Fisica Nuclear Aplicada; Navarro, Marcus V. Teixeira, E-mail: mvtn@ifba.edu.b [Instituto Federal da Bahia (LAFIR/NTS/IFBA) Salvador, BA (Brazil). Nucleo de Tecnologia em Saude. Lab. de Fisica Radiologica

    2011-07-01

    Uranium mining and processing at Lagoa Real (Bahia, Brazil) in the southwest of Bahia state started in the year 2000.The processing of uranium ore for obtaining U3O8 (yellowcake) is done today in the processing unit of the Brazilian Nuclear Industries INB located in the area of the same municipality above mentioned. The production capacity is 400 tons / year of U3O8, and the reserves in this region are estimated at 100.000 tons of uranium without any other associated minerals, enough to supply the demand for nuclear power plants Angra I and II for over 100 years. Since the granting of AOP (Permanent Operation Authorization) by CNEN (National Commission on Nuclear Energy) in the year 2009, there were some incidents at the facility, such as: solvents and liquid containing uranium overflow; pipes rupture, causing indiscriminate dispersion of toxic acids and other chemical agents; collapse of parts of the slope of the open pit. CNEN admitted in an official press release on April 1, 2011 that 'INB has no capacity to produce annual reports on environmental monitoring (unable to perform radiometric measurements, etc.). The last time a report was released happened in the year 2008. These reports are vital to the environmental impact assessment of the facility'. Another potential source of environmental and health negative impacts on the local population could be linked to radon emission. What are the levels of this important pollutant in the affected areas? (author)

  6. Determinants of homicides in the state of Bahia, Brazil, in 2009

    Directory of Open Access Journals (Sweden)

    Carlos Augusto Moreira de Sousa

    2014-03-01

    Full Text Available PURPOSE: To carry out a study of association between socioeconomic and demographic factors and homicides in general population, in the state of Bahia, in 2009. METHODS: This is an ecological study. The data were collected from the database of the Information System about Mortality of the Ministry of Health, from the Brazilian Institute of Geography and Statistics and the Institute of Applied Economic Research. The Global Moran index was calculated for the detection of spatial autocorrelation, and the Local Moran index was calculated for the detection of spatial Clusters. The transformation in the variable answer (homicides rates was performed and it was shaped using the Conditional Autoregressive Model. RESULTS: The data showed spatial autocorrelation. Two clusters of municipalities with high rates of homicides were identified, one located predominantly in the Greater Metropolitan Region of Salvador and the other in the South Region of Bahia, especially Eunápolis and Lauro de Freitas, which had the highest rates. The Average Residents Variables, local GDP and the Percentage of Illiteracy presented an inverse association with homicide rates, and the variables Firjan's municipal development index of work and income. Enrolment in high school and the Average of Bolsa Família were directly associated. CONCLUSIONS: The urbanization process, in most cases, not controlled by the State, in most cases, made the cities bigger and with better socioeconomic conditions, attraction centers for people with different socioeconomic levels, increasing the social inequality among the residents of these regions, with parallel increase in homicide rates.

  7. Industrial radiography in the State of Bahia, Brazil: The health protection of workers

    International Nuclear Information System (INIS)

    Andrade, Ana Emilia Oliveira de

    1997-01-01

    This study aimed to identify the Regulatory and Inspection Authority for actions developed by industrial radiography enterprises in the State of Bahia, Brazil, concerning health protection of workers exposed to ionizing radiation in industry. Institutions which legislate about this matter at international, national and State level were identified. These legislations were analysed according to recommendations by the Basic Safety Standards from the Atomic Energy International Agency. Medical Supervision is proposed as a factor to warrant protection to worker's health. This is a service evaluation study, encompassing results, processes and structural components. Emphasis is given to the process component which investigated the adequacy of which is performed by employees and workers. Five enterprises which provide industrial radiography services in the State of Bahia were identified, employing forty workers on a temporary basis. This study also observed: intense workforce, a complete process of contracting out in the sector; inadequate conditions of work organization (long work journey, night work, lack of days-off schedule); inefficiency of medical services responsible by worker's protection concerning radiation specific risks as well as other occupational risks, unrelated to main activity. There is a legal basis for Authorities actions, although it has not been completely implemented. These findings embased the elaboration of a proposal of a Surveillance Program for the Worker Exposed to Industrial Radiation, which includes the setting of safety standards and monitoring of workers exposed to ionization radiation in the occupational environment, accident prevention in this activity and the specialized health care to those affected by radio accidents. (author)

  8. Amphibians of Serra Bonita, southern Bahia: a new hotpoint within Brazil's Atlantic Forest hotspot.

    Science.gov (United States)

    Dias, Iuri Ribeiro; Medeiros, Tadeu Teixeira; Vila Nova, Marcos Ferreira; Solé, Mirco

    2014-01-01

    We studied the amphibian community of the Private Reserve of Natural Heritage (RPPN) Serra Bonita, an area of 20 km(2) with steep altitudinal gradients (200-950 m a.s.l.) located in the municipalities of Camacan and Pau-Brasil, southern Bahia State, Brazil. Data were obtained at 38 sampling sites (including ponds and transects within the forest and in streams), through active and visual and acoustic searches, pitfall traps, and opportunistic encounters. We recorded 80 amphibian species distributed in 15 families: Aromobatidae (1), Brachycephalidae (3), Bufonidae (4), Centrolenidae (2), Ceratophryidae (1), Craugastoridae (7), Eleutherodactylidae (2), Hemiphractidae (2), Hylidae (42), Hylodidae (1), Leptodactylidae (7), Microhylidae (3), Siphonopidae (1), Odontophrynidae (3) and Pipidae (1). Species richness was positively correlated with monthly rainfall. Near 36% of the species were found in strictly forest environments, 15% are endemic to Bahia State and 77.2% are endemic to the Atlantic Forest biome. The large species diversity of this small area, the high degree of endemism and the taxonomic and biogeographic significance turn the Serra Bonita mountain into a hotpoint for amphibians within Brazil's Atlantic Forest hotspot.

  9. Amphibians of Serra Bonita, southern Bahia: a new hotpoint within Brazil’s Atlantic Forest hotspot

    Directory of Open Access Journals (Sweden)

    Iuri Dias

    2014-10-01

    Full Text Available We studied the amphibian community of the Private Reserve of Natural Heritage (RPPN Serra Bonita, an area of 20 km2 with steep altitudinal gradients (200–950 m a.s.l. located in the municipalities of Camacan and Pau-Brasil, southern Bahia State, Brazil. Data were obtained at 38 sampling sites (including ponds and transects within the forest and in streams, through active and visual and acoustic searches, pitfall traps, and opportunistic encounters. We recorded 80 amphibian species distributed in 15 families: Aromobatidae (1, Brachycephalidae (3, Bufonidae (4, Centrolenidae (2, Ceratophryidae (1, Craugastoridae (7, Eleutherodactylidae (2, Hemiphractidae (2, Hylidae (42, Hylodidae (1, Leptodactylidae (7, Microhylidae (3, Siphonopidae (1, Odontophrynidae (3 and Pipidae (1. Species richness was positively correlated with monthly rainfall. Near 36% of the species were found in strictly forest environments, 15% are endemic to Bahia State and 77.2% are endemic to the Atlantic Forest biome. The large species diversity of this small area, the high degree of endemism and the taxonomic and biogeographic significance turn the Serra Bonita mountain into a hotpoint for amphibians within Brazil’s Atlantic Forest hotspot.

  10. Amphibians of Serra Bonita, southern Bahia: a new hotpoint within Brazil’s Atlantic Forest hotspot

    Science.gov (United States)

    Dias, Iuri Ribeiro; Medeiros, Tadeu Teixeira; Vila Nova, Marcos Ferreira; Solé, Mirco

    2014-01-01

    Abstract We studied the amphibian community of the Private Reserve of Natural Heritage (RPPN) Serra Bonita, an area of 20 km2 with steep altitudinal gradients (200–950 m a.s.l.) located in the municipalities of Camacan and Pau-Brasil, southern Bahia State, Brazil. Data were obtained at 38 sampling sites (including ponds and transects within the forest and in streams), through active and visual and acoustic searches, pitfall traps, and opportunistic encounters. We recorded 80 amphibian species distributed in 15 families: Aromobatidae (1), Brachycephalidae (3), Bufonidae (4), Centrolenidae (2), Ceratophryidae (1), Craugastoridae (7), Eleutherodactylidae (2), Hemiphractidae (2), Hylidae (42), Hylodidae (1), Leptodactylidae (7), Microhylidae (3), Siphonopidae (1), Odontophrynidae (3) and Pipidae (1). Species richness was positively correlated with monthly rainfall. Near 36% of the species were found in strictly forest environments, 15% are endemic to Bahia State and 77.2% are endemic to the Atlantic Forest biome. The large species diversity of this small area, the high degree of endemism and the taxonomic and biogeographic significance turn the Serra Bonita mountain into a hotpoint for amphibians within Brazil’s Atlantic Forest hotspot. PMID:25408616

  11. The dynamics of dengue virus serotype 3 introduction and dispersion in the state of Bahia, Brazil

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    Paulo Roberto Santana de Melo

    2007-12-01

    Full Text Available By 2002, dengue virus serotype 1 (DENV-1 and DENV-2 had circulated for more than a decade in Brazil. In 2002, the introduction of DENV-3 in the state of Bahia produced a massive epidemic and the first cases of dengue hemorrhagic fever. Based on the standardized frequency, timing and location of viral isolations by the state's Central Laboratory, DENV-3 probably entered Bahia through its capital, Salvador, and then rapidly disseminated to other cities, following the main roads. A linear regression model that included traffic flow, distance from the capital and DENV-1 circulation (r² = 0.24, p = 0.001 supported this hypothesis. This pattern was not seen for serotypes already in circulation and was not seen for DENV-3 in the following year. Human population density was another important factor in the intensity of viral circulation. Neither DENV-1 nor DENV-2 fit this model for 2001 or 2003. Since the vector has limited flight range and vector densities fail to correlate with intensity of viral circulation, this distribution represents the movement of infected people and to some extent mosquitoes. This pattern may mimic person-to-person spread of a new infection.

  12. Ants interacting with fruits of Melocactus conoideus Buining & Brederoo (Cactaceae in southwestern Bahia, Brazil

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    Katielle Silva Brito-Kateivas

    2012-04-01

    Full Text Available http://dx.doi.org/10.5007/2175-7925.2012v25n3p153   Formigas que interagem com frutos de Melocactus conoideus Buining & Brederoo (Cactaceae no sudoeste da Bahia, Brasil. O objetivo deste estudo foi verificar quais espécies de formigas interagem com os frutos de Melocactus conoideus e se existe remoção. O estudo foi realizado no Parque Municipal Serra do Periperi, município de Vitória da Conquista, Bahia, área de ocorrência da espécie. Frutos de 30 indivíduos foram marcados e observados durante o dia para identificação do comportamento das formigas. Sete espécies de cinco subfamílias de formigas foram observadas interagindo com os frutos e os gêneros mais envolvidos em interações foram Camponotus e Pheidole. Três eventos de remoção foram observados e realizados apenas pela espécie Pheidole sp. 2. Apesar de M. conoideus não ser uma espécie mirmecocórica, formigas foram registradas como dispersoras oportunistas, atividade que pode ter importantes consequências para a dinâmica populacional da espécie.

  13. THE TERRITORIAL FORMATION OF THE BAHIA WEST: THE ESTABLISHMENT OF “ALÉM SÃO FRANCISCO” (1827-1985

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    Paulo Roberto Baqueiro Brandão

    2010-07-01

    Full Text Available This writing is intended to understand, from Historical Geography, the main aspects concerning the territorial formation of the West of Bahia, between the years 1827, when the Brazilian imperial government ordered the annexation of the region by the Province of Bahia to the detriment of Pernambuco, and 1985, the date that marked the introduction of techniques induce the agricultural modernization in this region. The main objective of this paper is therefore to identify the agents of production space and territorial dynamics that resulted in the formation of technical means in Western Bahia along the cut-space of 158 years.

  14. Study on Brazil law type twinning in amethyst from Bahia (Brazil) by the X-ray topography and polarized light

    International Nuclear Information System (INIS)

    Baran, Z.

    1987-01-01

    Brazil law type twinning is very common in quartz. Generally is not observed in normal petrographic thin section but it is possible to study this kind of twinning under polarized light in thicker sections. X-ray topography will be another powerfull method to study and it was applied for the amethytst of the Mina Cabeluda of the state of Bahia. (author) [pt

  15. Variability and correlation of physical attributes of soils cultivated with cacao trees in two climate zones in southern Bahia, Brazil

    Science.gov (United States)

    Cacao (Theobroma cacao) is a very important crop in southern Bahia, Brazil, which needs good climate and soil conditions and management for great productivity. In this region, the culture is developed in a large variety of soils, which indicates differentiated products. The aim of this study was to ...

  16. Centre social Bidonville "Bourg des deux frères", Salvador da Bahia, Nordeste Brésil

    OpenAIRE

    Layette, SOS.; Père Maurice Abel

    1986-01-01

    Social centre Shantytowns "Bourg des deux freres", Salvador da Bahia. Nordeste Brazil. The analysis of so far published information on the eco-biology, reproduction, depths distributions and specific fishery of Epinephelus aeneus in the eastern central Atlantic enables to suggest the existence of a bathymetrie migration along the coast of Senegal.

  17. The Declining Cocoa Economy and the Atlantic Forest of Southern Bahia, Brazil: Conservation Attitudes of Cocoa Planters.

    Science.gov (United States)

    Alger, Keith; Caldas, Marcellus

    1994-01-01

    Causes of the degradation of Brazilian Atlantic Forest in the southeastern cocoa region of the State of Bahia are investigated by means of a survey on cocoa planter's forest conservation attitudes. Policies encouraging private forest conservation, and development of forest-conserving agricultural alternatives for landless poor are recommended. (LZ)

  18. Invertebrados asociados al coral constructor de arrecifes Pocillopora damicornis en Playa Blanca, Bahía Culebra, Costa Rica Invertebrates associated with the reef-building coral Pocillopora damicornis at Playa Blanca, Bahía Culebra, Costa Rica

    Directory of Open Access Journals (Sweden)

    Juan José Alvarado

    2012-04-01

    Full Text Available Los arrecifes coralinos son uno de los ecosistemas más diversos en el planeta, tanto por los organismos constructores como por aquellos que viven encima, sobre, dentro y debajo de ellos. Los corales del genero Pocillopora son reconocidos mundialmente por albergar una importante fauna de invertebrados entre sus ramas, los cuales son considerados como simbiontes obligatorios en una gran cantidad de casos. La presente investigación describe la fauna de invertebrados asociados al coral Pocillopora damicornis en Bahía Culebra, Costa Rica, describiendo sus densidades, frecuencias, riquezas y diversidades a través del tiempo. Para esto se colectaron 5 colonias cada 3-4 meses en Playa Blanca, Bahía Culebra. En total se encontraron 448 individuos en 35 especies, siendo Harpiliopsis depressa, Lithophaga aristata, Trapezia ferruginea, Alpheus lottini, Fennera chacei, y Petrolisthes haigae las especies predominantes. Noviembre fue el mes en el que se encontraron los mayores valores en los índices de riqueza, diversidad y diferenciación taxonómica, mientras que agosto fue el que presento los valores más bajos de todos. En términos generales, la época lluviosa mostro mayor riqueza de especies que la época seca. Así mismo, las especies colectados y los valores obtenidos son muy similares a otras zonas del Pacifico Oriental Tropical. Culebra ha venido sufriendo una perdida en la cobertura coralina, que podría tener consecuencias en la diversidad y abundancia de organismos asociados a corales. Estas consecuencias incluyen perdida en la fecundidad de estos organismos, una reducción en su función como limpiadores y protectores de depredadores del coral, poniendo en riesgo su diversidad, lo que puede afectar los stocks de peces depredadores que depende de ellos. Realizar monitoreos permanentes de la criptofauna asociada al coral Pocillopora va a ser determinante para cuantificar perdidas o recuperaciones en la composición de invertebrados asociados

  19. Solar radiation and its penetration in a tropical estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Qasim, S.Z.; Bhattathiri, P.M.A.; Abidi, S.A.H.

    The Cochin Backwater which is an estuarine area on the west coast of India receives maximum solar radiation from December to March and minimum from June to September. During the monsoon months the estuary becomes highly turbid as a result...

  20. Evaluating Causes of Ecological Impairments in the Estuaries of Ukraine

    Science.gov (United States)

    Ukrainian estuaries have not undergone a systematic evaluation of the causes of ecological impairments caused by anthropogenic contamination. The objective of this evaluation is to use recently developed diagnostic tools to determine the causes of benthic ecological impairments. ...

  1. Fish and Salinity in the San Francisco Estuary

    Science.gov (United States)

    This page provides access to a set of time-series maps for six fishes that live in the SF Estuary. Maps were produced to strengthen best available science that inform actions needed to improve protection for aquatic life.

  2. Estuary 2100 Project, Phase 2: Building Partnerships for Resilient Watersheds

    Science.gov (United States)

    Information about the SFBWQP Estuary 2100 Project, Phase 2: Building Partnerships for Resilient Watersheds, part of an EPA competitive grant program to improve SF Bay water quality focused on restoring impaired waters and enhancing aquat

  3. an ecophysiological study of the meiofauna of the swartkops estuary ...

    African Journals Online (AJOL)

    fauna in two exposed beaches in the Swartkops Estuary, near Port Elizabeth, were elucidated. PopUlation ... Variations of temperature and oxygen were found to be responsible for this pattern. ..... Apart from very low numbers of hermit crabs.

  4. Plutonium in Atlantic coastal estuaries in the southeastern United States

    International Nuclear Information System (INIS)

    Hayes, D.W.; LeRoy, J.H.; Cross, F.A.

    1975-01-01

    A survey was made to begin to provide baseline information on the Pu distribution of representative estuarine and coastal areas of the southeastern United States. Sediments and marsh grass (Spartina) were collected and analyzed from three locations within a tidal marsh. In three estuaries (Savannah, Neuse, and Newport), the suspended particulate matter (1 μm and greater) was filtered from waters with different salinities, and the plutonium content of the particulates determined. The Savannah River estuary, in addition to fallout Pu, has received up to 0.3 Ci of Pu from the Savannah River Plant (SRP) of the U. S. Energy Research and Development Administration. The SRP plutonium has a variable isotopic composition that can influence Pu isotopic ratios in the estuarine system. The other estuaries do not have nuclear installations upstream. Data are included on the content of 238 Pu, 239 Pu, and 240 Pu in sediments and marsh grass of the Savannah River estuary

  5. St. Louis River Estuary 2011 - 2013 Faucet snail location data

    Data.gov (United States)

    U.S. Environmental Protection Agency — The dataset consists of GPS coordinates for benthic invertebrate collections made in the St. Louis River Estuary in 2011 through 2013, and information on whether and...

  6. Heavy metal accumulation in a flow restricted, tropical estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Balachandran, K.K.; Laluraj, C.M.; Nair, M.; Joseph, T.; Sheeba, P.; Venugopal, P.

    Levels of heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn), organic carbon content and textural characteristics in the surficial sediments of Cochin estuary (SW coast of India) and adjacent coast are presented. Anthropogenic inputs from...

  7. Comparative assessment of two agriculturally-influenced estuaries

    CSIR Research Space (South Africa)

    Lemley, DA

    2017-04-01

    Full Text Available This study compared the spatio-temporal dynamics in two agriculturally-influenced South African estuaries - Gamtoos and Sundays - to investigate how contrasting hydrological alterations influence physical, chemical and biological responses...

  8. Bacterial contamination of mussels at Mahe estuary, Malabar coast

    Digital Repository Service at National Institute of Oceanography (India)

    Gore, P.S.; Raveendran, O.; Iyer, T.S.G.; Varma, P.R.G.; Sankaranarayanan, V.N.

    Mussel samples from the mussel bed and near-by market, beach sand, sediment and water from the Mahe Estuary, Kerala, India were analysed for the bacterial quality. Indicator bacteria such as Escherichia coli and faecal streptococci were isolated...

  9. Habitat Scale Mapping of Fisheries Ecosystem Service Values in Estuaries

    Directory of Open Access Journals (Sweden)

    Timothy G. O'Higgins

    2010-12-01

    Full Text Available Little is known about the variability of ecosystem service values at spatial scales most relevant to local decision makers. Competing definitions of ecosystem services, the paucity of ecological and economic information, and the lack of standardization in methodology are major obstacles to applying the ecosystem-services approach at the estuary scale. We present a standardized method that combines habitat maps and habitat-faunal associations to estimate ecosystem service values for recreational and commercial fisheries in estuaries. Three case studies in estuaries on the U.S. west coast (Yaquina Bay, Oregon, east coast (Lagoon Pond, Massachusetts, and the Gulf of Mexico (Weeks Bay, Alabama are presented to illustrate our method's rigor and limitations using available data. The resulting spatially explicit maps of fisheries ecosystem service values show within and between estuary variations in the value of estuarine habitat types that can be used to make better informed resource-management decisions.

  10. How the National Estuary Programs Address Environmental Issues

    Science.gov (United States)

    Estuaries face many challenges including, alteration of natural hydrologic flows, aquatic nuisance species, climate change, declines in fish and wildlife populations, habitat loss and degradation, nutrient loads, pathogens, stormwater and toxics.

  11. Short term variations in particulate matter in Mahi river estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Bhosle, N.B.; Rokade, M.A.; Zingde, M.D.

    The particulate matter (PM) collected from Mahi River Estuary was analysed for organic carbon (POC), nitrogen (PON), and chlorophyll a (Chl a). The concentration of PM, POC, PON and Chl a showed short term variations. Average surface concentration...

  12. Time-dependence of salinity in monsoonal estuaries

    Digital Repository Service at National Institute of Oceanography (India)

    Vijith, V.; Sundar, D.; Shetye, S.R.

    processes (diffusion, gravity current formation, impact of tidal asymmetries, etc.) is balanced by salinity-egress induced by runoff. Here we point out that the salinity field of the estuaries that are located on the coasts of the Indian subcontinent...

  13. Phytoplankton Diversity in the Cross River Estuary of Nigeria ...

    African Journals Online (AJOL)

    DR. MIKE HORSFALL

    This study was carried out to provide a concise set of structural based .... further growth of diatom in this zone due to rapid uptake of ... Table 1: Taxonomic listing and spatial distribution of phytoplankton species in Cross Rivers estuary. (+ =.

  14. Commercially important penaeid shrimp larvae in the estuaries of Goa

    Digital Repository Service at National Institute of Oceanography (India)

    Achuthankutty, C.T.

    Larval stages of the penaeid shrimps, Metapenaeus dobsoni (Miers), M. affinis (Milne - Edwards) and Penaeus merguiensis De Man were mostly distributed at the lower reaches of Mandovi and Zuari estuaries. While larvae of M. dobsoni and M. affinis...

  15. Methane and nitrous oxide emissions from a subtropical estuary (the Brisbane River estuary, Australia)

    Energy Technology Data Exchange (ETDEWEB)

    Musenze, Ronald S.; Werner, Ursula [Advanced Water Management Centre (AWMC), the University of Queensland, Brisbane, Qld 4072 (Australia); Grinham, Alistair [Advanced Water Management Centre (AWMC), the University of Queensland, Brisbane, Qld 4072 (Australia); School of Civil Engineering, the University of Queensland, Brisbane, Qld 4072 (Australia); Udy, James [Healthy Waterways Ltd, P.O. Box 13086, George Street, Brisbane, Qld 4003 (Australia); Yuan, Zhiguo, E-mail: z.yuan@awmc.uq.edu.au [Advanced Water Management Centre (AWMC), the University of Queensland, Brisbane, Qld 4072 (Australia)

    2014-02-01

    Methane (CH{sub 4}) and nitrous oxide (N{sub 2}O) are two key greenhouse gases. Their global atmospheric budgeting is, however, flout with challenges partly due to lack of adequate field studies determining the source strengths. Knowledge and data limitations exist for subtropical and tropical regions especially in the southern latitudes. Surface water methane and nitrous oxide concentrations were measured in a subtropical estuarine system in the southern latitudes in an extensive field study from 2010 to 2012 and water–air fluxes estimated using models considering the effects of both wind and flow induced turbulence. The estuary was found to be a strong net source of both CH{sub 4} and N{sub 2}O all-year-round. Dissolved N{sub 2}O concentrations ranged between 9.1 ± 0.4 to 45.3 ± 1.3 nM or 135 to 435% of atmospheric saturation level, while CH{sub 4} concentrations varied between 31.1 ± 3.7 to 578.4 ± 58.8 nM or 1210 to 26,430% of atmospheric saturation level. These results compare well with measurements from tropical estuarine systems. There was strong spatial variability with both CH{sub 4} and N{sub 2}O concentrations increasing upstream the estuary. Strong temporal variability was also observed but there were no clear seasonal patterns. The degree of N{sub 2}O saturation significantly increased with NO{sub x} concentrations (r{sup 2} = 0.55). The estimated water–air fluxes varied between 0.1 and 3.4 mg N{sub 2}O m{sup −2} d{sup −1} and 0.3 to 27.9 mg CH{sub 4} m{sup −2} d{sup −1}. Total emissions (CO{sub 2}-e) were N{sub 2}O (64%) dominated, highlighting the need for reduced nitrogen inputs into the estuary. Choice of the model(s) for estimation of the gas transfer velocity had a big bearing on the estimated total emissions. - Highlights: • The estuary is a strong source of atmospheric methane and nitrous oxide. • Emissions had strong spatial-temporal variability with unclear seasonal patterns. • Dissolved gas saturation comparable to that

  16. Methane and nitrous oxide emissions from a subtropical estuary (the Brisbane River estuary, Australia)

    International Nuclear Information System (INIS)

    Musenze, Ronald S.; Werner, Ursula; Grinham, Alistair; Udy, James; Yuan, Zhiguo

    2014-01-01

    Methane (CH 4 ) and nitrous oxide (N 2 O) are two key greenhouse gases. Their global atmospheric budgeting is, however, flout with challenges partly due to lack of adequate field studies determining the source strengths. Knowledge and data limitations exist for subtropical and tropical regions especially in the southern latitudes. Surface water methane and nitrous oxide concentrations were measured in a subtropical estuarine system in the southern latitudes in an extensive field study from 2010 to 2012 and water–air fluxes estimated using models considering the effects of both wind and flow induced turbulence. The estuary was found to be a strong net source of both CH 4 and N 2 O all-year-round. Dissolved N 2 O concentrations ranged between 9.1 ± 0.4 to 45.3 ± 1.3 nM or 135 to 435% of atmospheric saturation level, while CH 4 concentrations varied between 31.1 ± 3.7 to 578.4 ± 58.8 nM or 1210 to 26,430% of atmospheric saturation level. These results compare well with measurements from tropical estuarine systems. There was strong spatial variability with both CH 4 and N 2 O concentrations increasing upstream the estuary. Strong temporal variability was also observed but there were no clear seasonal patterns. The degree of N 2 O saturation significantly increased with NO x concentrations (r 2 = 0.55). The estimated water–air fluxes varied between 0.1 and 3.4 mg N 2 O m −2 d −1 and 0.3 to 27.9 mg CH 4 m −2 d −1 . Total emissions (CO 2 -e) were N 2 O (64%) dominated, highlighting the need for reduced nitrogen inputs into the estuary. Choice of the model(s) for estimation of the gas transfer velocity had a big bearing on the estimated total emissions. - Highlights: • The estuary is a strong source of atmospheric methane and nitrous oxide. • Emissions had strong spatial-temporal variability with unclear seasonal patterns. • Dissolved gas saturation comparable to that in tropical rivers and polluted estuaries. • Emissions are dominated by N2O, which

  17. Texto y figuras preparatorios del Capítulo 11 (Tomo I) de la Histología del Sistema Nervioso de Cajal: [ESTRUCTURA DE LA SUBSTANCIA BLANCA DE LA MÉDULA].

    OpenAIRE

    Freire, Miguel

    2007-01-01

    [ESTRUCTURA DE LA SUBSTANCIA BLANCA DE LA MÉDULA]. Tubos nerviosos, [fibras sin mielina,] células neuróglicas y colaterales nerviosas. ─ Variedades de colaterales distinguidas por el área gris en que se terminan ─ Fibras nerviosas terminales. ─ Fascículos dislocados de la substancia blanca. [Ver: Freire, Miguel. Metodología usada en la presente edición. Metodología e historia de la edición en la correspondencia de Cajal. https://digital.csic.es/handle/10261/150245

  18. Testing Pixel Translation Digital Elevation Models to Reconstruct Slip Histories: An Example from the Agua Blanca Fault, Baja California, Mexico

    Science.gov (United States)

    Wilson, J.; Wetmore, P. H.; Malservisi, R.; Ferwerda, B. P.; Teran, O.

    2012-12-01

    We use recently collected slip vector and total offset data from the Agua Blanca fault (ABF) to constrain a pixel translation digital elevation model (DEM) to reconstruct the slip history of this fault. This model was constructed using a Perl script that reads a DEM file (Easting, Northing, Elevation) and a configuration file with coordinates that define the boundary of each fault segment. A pixel translation vector is defined as a magnitude of lateral offset in an azimuthal direction. The program translates pixels north of the fault and prints their pre-faulting position to a new DEM file that can be gridded and displayed. This analysis, where multiple DEMs are created with different translation vectors, allows us to identify areas of transtension or transpression while seeing the topographic expression in these areas. The benefit of this technique, in contrast to a simple block model, is that the DEM gives us a valuable graphic which can be used to pose new research questions. We have found that many topographic features correlate across the fault, i.e. valleys and ridges, which likely have implications for the age of the ABF, long term landscape evolution rates, and potentially provide conformation for total slip assessments The ABF of northern Baja California, Mexico is an active, dextral strike slip fault that transfers Pacific-North American plate boundary strain out of the Gulf of California and around the "Big Bend" of the San Andreas Fault. Total displacement on the ABF in the central and eastern parts of the fault is 10 +/- 2 km based on offset Early-Cretaceous features such as terrane boundaries and intrusive bodies (plutons and dike swarms). Where the fault bifurcates to the west, the northern strand (northern Agua Blanca fault or NABF) is constrained to 7 +/- 1 km. We have not yet identified piercing points on the southern strand, the Santo Tomas fault (STF), but displacement is inferred to be ~4 km assuming that the sum of slip on the NABF and STF is

  19. El tópico del hambre como construcción metafórica del sentido en la poesía de blanca varela

    Directory of Open Access Journals (Sweden)

    Mara Donat

    2015-05-01

    Full Text Available Into the poetic of descent proposed by the literary critic Cárcamo-Huechante, Blanca Varela developes a poetry in relation with corporality and deterioration. Existencialism thought connects with the search of a material poetic word, fill with corporal, byologic elements. Hunger is the privileged metaphor in the process of materialization of poetic writing. It is social and linguistic demand against unjustice and the impoverished language system, also into literary tradition. We propose an exegesis of metaphoric configuration of hunger through a thematic and a stylistic line of research, which embodies sense and sound of poetic word.

  20. Reseña de "Los trajines callejeros. Memoria y vida cotidiana" (Eduardo Kingman Garcés y Blanca Muratorio, 2014

    Directory of Open Access Journals (Sweden)

    María Ángela Cifuentes Guerra

    2016-12-01

    Full Text Available Fruto de un trabajo conjunto, Eduardo Kingman Garcés y Blanca Muratorio exploran a lo largo de los diferentes textos que comprenden este libro el significado cultural de los trajines callejeros y otras formas de entender y estudiar las culturas urbanas. El relato, la imagen visual y el objeto se presentan como sus recursos centrales para un análisis compartido entre la historia y la antropología. Quito en su primera modernidad, entre los siglos XIX y XX, es el objeto de gran parte de sus análisis aquí expuestos.

  1. Análisis del Clima Laboral a través de la Comunicación Interna: "Caso Industria de Línea Blanca"

    OpenAIRE

    Ortiz Ochoa, Melania Francisca

    2013-01-01

    La presente es una investigación de campo realizada en una empresa productora de línea blanca, la misma que cuenta con su matriz en la ciudad de Cuenca, La investigación está basada en el impacto de contar con un proceso de comunicación interna, inmersa en los procesos estratégicos de la organización, para conseguir un mejor resultado en el Clima Laboral organizacional. La investigación ha sido sustentado en un marco teórico práctico establecidos en lineamentos y políticas instituidas en la o...

  2. Assessing the variability of glacier lake bathymetries and potential peak discharge based on large-scale measurements in the Cordillera Blanca, Peru

    Science.gov (United States)

    Cochachin, Alejo; Huggel, Christian; Salazar, Cesar; Haeberli, Wilfried; Frey, Holger

    2015-04-01

    Over timescales of hundreds to thousands of years ice masses in mountains produced erosion in bedrock and subglacial sediment, including the formation of overdeepenings and large moraine dams that now serve as basins for glacial lakes. Satellite based studies found a total of 8355 glacial lakes in Peru, whereof 830 lakes were observed in the Cordillera Blanca. Some of them have caused major disasters due to glacial lake outburst floods in the past decades. On the other hand, in view of shrinking glaciers, changing water resources, and formation of new lakes, glacial lakes could have a function as water reservoirs in the future. Here we present unprecedented bathymetric studies of 124 glacial lakes in the Cordillera Blanca, Huallanca, Huayhuash and Raura in the regions of Ancash, Huanuco and Lima. Measurements were carried out using a boat equipped with GPS, a total station and an echo sounder to measure the depth of the lakes. Autocad Civil 3D Land and ArcGIS were used to process the data and generate digital topographies of the lake bathymetries, and analyze parameters such as lake area, length and width, and depth and volume. Based on that, we calculated empirical equations for mean depth as related to (1) area, (2) maximum length, and (3) maximum width. We then applied these three equations to all 830 glacial lakes of the Cordillera Blanca to estimate their volumes. Eventually we used three relations from the literature to assess the peak discharge of potential lake outburst floods, based on lake volumes, resulting in 3 x 3 peak discharge estimates. In terms of lake topography and geomorphology results indicate that the maximum depth is located in the center part for bedrock lakes, and in the back part for lakes in moraine material. Best correlations are found for mean depth and maximum width, however, all three empirical relations show a large spread, reflecting the wide range of natural lake bathymetries. Volumes of the 124 lakes with bathymetries amount to 0

  3. Plan estratégico para la producción de electrodomésticos de línea blanca en el Perú.

    OpenAIRE

    Cervantes Choquehuayta, Anny Stephanie; Chuquicondor Pinto, Nohelia; Gonzales Cruz, Juan Carlos; Ortiz Siu, Paul Alonso

    2016-01-01

    En el presente documento se elabora el Planeamiento Estratégico para la Producción de Electrodomésticos de Línea Blanca en el Perú. En el mismo se realiza una exhaustiva revisión y análisis de las variables que mueven a los productores para hacer más competitivos en un mercado dominado principalmente por la producción extranjera. El análisis de los factores internos y externos que permitieron desarrollar la matriz FODA han sido el punto de partida para analizar la situación act...

  4. Efecto de la combinación de clorhexidina y fluoruro de sodio sobre Streptococcus mutans en preescolares con manchas blancas.

    OpenAIRE

    Ayala, Grascely; Álvarez, María; Nuñez, Miguel

    2016-01-01

    Objetivos: Determinar el efecto de la combinación de los barnices diacetato de clorhexidina 1 % y fluoruro de sodio 5 % sobre Streptococcus mutans en saliva de niños de 3 a 5 años con manchas blancas. Material y métodos: Se incluyeron 45 niños, divididos en 3 grupos: combinación clorhexidina 1 % y fluoruro de sodio 5 % (n=15), fluoruro de sodio 5 % (n=15) y placebo (n=15). Después de 8 semanas se evaluó microbiológicamente. Resultados: Todos los grupos redujeron significativamente los S. muta...

  5. Cladocerans (Branchiopoda) of a tropical estuary in Brazil

    OpenAIRE

    Paranaguá, M. N; Neumann-Leitão, S; Nogueira-Paranhos, J. D; Silva, T. A.; Matsumura-Tundisi, T.

    2005-01-01

    The study was conducted in the Capibaribe river estuary in Recife (Brazil) to assess the role played by cladocerans in a eutrophic environment. Samplings were carried out monthly at 4 fixed stations along the estuary from July 1987 to June 1988. Collections were made with a plankton net of 65 micrometers mesh size. Six cladocerans species were registered: Penilia avirostris, Diaphanosoma spinulosum, Chydorus barroisi, Ceriodaphnia rigaudi, Ilyocryptus spinifer, and Moina micrura. The most fre...

  6. Contamination and restoration of an estuary affected by phosphogypsum releases

    International Nuclear Information System (INIS)

    Villa, M.; Mosqueda, F.; Hurtado, S.; Mantero, J.; Manjon, G.; Perianez, R.; Vaca, F.; Garcia-Tenorio, R.

    2009-01-01

    The Huelva Estuary in Huelva, Spain, has been one of the most studied environmental compartments in the past years from the point of view of naturally occurring radioactive material (NORM) releases. It has been historically affected by waste releases, enriched in radionuclides from the U-decay series, from factories located in the area devoted to the production of phosphoric acid and phosphate fertilizers. Nevertheless, changes in national regulations forced a new waste management practice in 1998, prohibiting releases of phosphogypsum into the rivers. The input of natural radionuclides from phosphate factories to rivers was drastically reduced. Because of this there was a unique opportunity for the study of the response of a contaminated environmental compartment, specifically an estuary affected by tidal influences, after the cessation of the contaminant releases to, in this case, the Huelva Estuary (henceforth referred to as the Estuary). To investigate the environmental response to this new discharge regime, the specific activities of radionuclides 226 Ra and 210 Pb in water and sediment samples collected in four campaigns (from 1999 to 2005) were determined and compared with pre-1998 values. From this study it is possible to infer the most effective mechanisms of decontamination for the Estuary. Decontamination rates of 210 Pb and 226 Ra in the sediments and water have been calculated using exponential fittings and corresponding half-lives have been deduced from them. The cleaning half-life in the whole area of the Estuary is about 6 and 3.5 years for 226 Ra and 210 Pb respectively. The observed trend clearly shows that contamination of the Estuary by natural radionuclides is now decreasing and radioactive levels in waters and sediments are approaching the natural background references. This work attempts to evaluate whether it can be expected that the decontamination of the enhanced levels of natural radioactivity in the Estuary can be performed via natural

  7. Juvenile salmon usage of the Skeena River estuary.

    Science.gov (United States)

    Carr-Harris, Charmaine; Gottesfeld, Allen S; Moore, Jonathan W

    2015-01-01

    Migratory salmon transit estuary habitats on their way out to the ocean but this phase of their life cycle is more poorly understood than other phases. The estuaries of large river systems in particular may support many populations and several species of salmon that originate from throughout the upstream river. The Skeena River of British Columbia, Canada, is a large river system with high salmon population- and species-level diversity. The estuary of the Skeena River is under pressure from industrial development, with two gas liquefaction terminals and a potash loading facility in various stages of environmental review processes, providing motivation for understanding the usage of the estuary by juvenile salmon. We conducted a juvenile salmonid sampling program throughout the Skeena River estuary in 2007 and 2013 to investigate the spatial and temporal distribution of different species and populations of salmon. We captured six species of juvenile anadromous salmonids throughout the estuary in both years, and found that areas proposed for development support some of the highest abundances of some species of salmon. Specifically, the highest abundances of sockeye (both years), Chinook in 2007, and coho salmon in 2013 were captured in areas proposed for development. For example, juvenile sockeye salmon were 2-8 times more abundant in the proposed development areas. Genetic stock assignment demonstrated that the Chinook salmon and most of the sockeye salmon that were captured originated from throughout the Skeena watershed, while some sockeye salmon came from the Nass, Stikine, Southeast Alaska, and coastal systems on the northern and central coasts of British Columbia. These fish support extensive commercial, recreational, and First Nations fisheries throughout the Skeena River and beyond. Our results demonstrate that estuary habitats integrate species and population diversity of salmon, and that if proposed development negatively affects the salmon populations that

  8. Contamination and restoration of an estuary affected by phosphogypsum releases

    Energy Technology Data Exchange (ETDEWEB)

    Villa, M., E-mail: mvilla@us.es [Centro de Investigacion, Tecnologia e Innovacion, Universidad de Sevilla CITIUS, Av. Reina Mercedes 4B, E41012-Sevilla (Spain); Mosqueda, F. [Dpto. de Fisica Aplicada, Facultad de Ciencias Experimentales, Universidad de Huelva, Campus de El Carmen, 21007-Huelva (Spain); Hurtado, S. [Centro de Investigacion, Tecnologia e Innovacion, Universidad de Sevilla CITIUS, Av. Reina Mercedes 4B, E41012-Sevilla (Spain); Mantero, J.; Manjon, G. [E. T. S. Arquitectura, Universidad de Sevilla, Departamento de Fisica Aplicada II, Av. Reina Mercedes, 2. 41012-Sevilla (Spain); Perianez, R. [E.U.I.T.A., Universidad de Sevilla, Departamento de Fisica Aplicada III, Carretera de Utrera, Km. 1, 41013 Sevilla (Spain); Vaca, F. [Dpto. de Fisica Aplicada, Facultad de Ciencias Experimentales, Universidad de Huelva, Campus de El Carmen, 21007-Huelva (Spain); Garcia-Tenorio, R. [E. T. S. Arquitectura, Universidad de Sevilla, Departamento de Fisica Aplicada II, Av. Reina Mercedes, 2. 41012-Sevilla (Spain)

    2009-12-15

    The Huelva Estuary in Huelva, Spain, has been one of the most studied environmental compartments in the past years from the point of view of naturally occurring radioactive material (NORM) releases. It has been historically affected by waste releases, enriched in radionuclides from the U-decay series, from factories located in the area devoted to the production of phosphoric acid and phosphate fertilizers. Nevertheless, changes in national regulations forced a new waste management practice in 1998, prohibiting releases of phosphogypsum into the rivers. The input of natural radionuclides from phosphate factories to rivers was drastically reduced. Because of this there was a unique opportunity for the study of the response of a contaminated environmental compartment, specifically an estuary affected by tidal influences, after the cessation of the contaminant releases to, in this case, the Huelva Estuary (henceforth referred to as the Estuary). To investigate the environmental response to this new discharge regime, the specific activities of radionuclides {sup 226}Ra and {sup 210}Pb in water and sediment samples collected in four campaigns (from 1999 to 2005) were determined and compared with pre-1998 values. From this study it is possible to infer the most effective mechanisms of decontamination for the Estuary. Decontamination rates of {sup 210}Pb and {sup 226}Ra in the sediments and water have been calculated using exponential fittings and corresponding half-lives have been deduced from them. The cleaning half-life in the whole area of the Estuary is about 6 and 3.5 years for {sup 226}Ra and {sup 210}Pb respectively. The observed trend clearly shows that contamination of the Estuary by natural radionuclides is now decreasing and radioactive levels in waters and sediments are approaching the natural background references. This work attempts to evaluate whether it can be expected that the decontamination of the enhanced levels of natural radioactivity in the Estuary

  9. Continuous resistivity profiling data from the Corsica River Estuary, Maryland

    Science.gov (United States)

    Cross, V.A.; Bratton, J.F.; Worley, C.R.; Crusius, J.; Kroeger, K.D.

    2011-01-01

    Submarine groundwater discharge (SGD) into Maryland's Corsica River Estuary was investigated as part of a larger study to determine its importance in nutrient delivery to the Chesapeake Bay. The Corsica River Estuary represents a coastal lowland setting typical of much of the eastern bay. An interdisciplinary U.S. Geological Survey (USGS) science team conducted field operations in the lower estuary in April and May 2007. Resource managers are concerned about nutrients that are entering the estuary via SGD that may be contributing to eutrophication, harmful algal blooms, and fish kills. Techniques employed in the study included continuous resistivity profiling (CRP), piezometer sampling of submarine groundwater, and collection of a time series of radon tracer activity in surface water. A CRP system measures electrical resistivity of saturated subestuarine sediments to distinguish those bearing fresh water (high resistivity) from those with saline or brackish pore water (low resistivity). This report describes the collection and processing of CRP data and summarizes the results. Based on a grid of 67.6 kilometers of CRP data, low-salinity (high-resistivity) groundwater extended approximately 50-400 meters offshore from estuary shorelines at depths of 5 to >12 meters below the sediment surface, likely beneath a confining unit. A band of low-resistivity sediment detected along the axis of the estuary indicated the presence of a filled paleochannel containing brackish groundwater. The meandering paleochannel likely incised through the confining unit during periods of lower sea level, allowing the low-salinity groundwater plumes originating from land to mix with brackish subestuarine groundwater along the channel margins and to discharge. A better understanding of the spatial variability and geological controls of submarine groundwater flow beneath the Corsica River Estuary could lead to improved models and mitigation strategies for nutrient over-enrichment in the

  10. Hydro-morphological modelling of small, wave-dominated estuaries

    Science.gov (United States)

    Slinger, Jill H.

    2017-11-01

    Small, intermittently open or closed estuaries are characteristic of the coasts of South Africa, Australia, California, Mexico and many other areas of the world. However, modelling attention has tended to focus on big estuaries that drain large catchments and serve a wide diversity of interests e.g. agriculture, urban settlement, recreation, commercial fishing. In this study, the development of a simple, parametric, system dynamics model to simulate the opening and closure of the mouths of small, wave-dominated estuaries is reported. In the model, the estuary is conceived as a basin with a specific water volume to water level relationship, connected to the sea by a channel of fixed width, but variable sill height. Changes in the form of the basin are not treated in the model, while the dynamics of the mouth channel are central to the model. The magnitude and direction of the flow through the mouth determines whether erosion or deposition of sediment occurs in the mouth channel, influencing the sill height. The model is implemented on the Great Brak Estuary in South Africa and simulations reveal that the raised low water levels in the estuary during spring tide relative to neap tide, are occasioned by the constriction of the tidal flow through the shallow mouth. Freshwater inflows to the estuary are shown to be significant in determining the behaviour of the inlet mouth, a factor often ignored in studies on tidal inlets. Further it is the balance between freshwater inflows and wave events that determines the opening or closure of the mouth of a particular estuary.

  11. Functional diversity of fish in estuaries at a global extent

    OpenAIRE

    Rita P Vasconcelos; Sébastien Villéger; François Guilhaumon

    2015-01-01

    Biodiversity is currently viewed as a framework encompassing multiple facets of the variety of life, including taxonomic and functional aspects. Species richness and composition of fish assemblages in estuaries is defined by global to local processes acting on community colonization. The present study further investigates how biodiversity of fish assemblages varies among estuaries globally, by simultaneously analysing taxonomic and functional richness and diversity of assemblages. A comprehen...

  12. [Distribution patterns and bioerosion of the sea urchin Centrostephanus coronatus (Diadematoida: Diadematidae), at the reef of Playa Blanca, Colombian Pacific].

    Science.gov (United States)

    Toro-Farmer, Gerardo; Cantera, Jaime R; Londoño-Cruz, Edgardo; Orozco, Carlos; Neira, Raul

    2004-03-01

    Regular sea-urchins are one of the main bioeroding organisms affecting coral reefs around the world. The abundance, distribution and bioerosion rate of the sea-urchin Centrostephanus coronatus, were determined in different reef zones of Playa Blanca fringing reef (Gorgona Island, Colombian pacific coast) during 1997 and 1998. The erosion rates were determined calcinating the gut content of the sea-urchins to eliminate all organic components and preserve the inorganic portion of calcium carbonate. C. coronatus showed the highest densities towards the central zones of the reef (plain-crest and front) (12.4 ind/m2; range 0-48 ind/m2). The highest mean bioerosion rate was 0.103 kgCaCO3/m2/yr in the reef plain-crest (0-0.69 kgCaCO3/m2/yr). In the other zones, (back reef and reef front) the mean bioerosion rates were 0.071 (range 0-0.39) and 0.052 (range 0-0.31) kgCaCO3/m2/yr respectively. According to the present data, it can be seen that the destruction of coralline skeletons, produced in this reef by sea-urchins is rather low, compared with the abrasion caused by these organisms in other places of the world. However, the combined action of C. coronatus and other bioeroding organisms (borers and grazers). along with some adverse environmental factors to corals, can be causing a negative balance between normal processes of reef accretion-destruction in Gorgona Island reefs.

  13. Role of body condition score and body weight in the control of seasonal reproduction in Blanca Andaluza goats.

    Science.gov (United States)

    Gallego-Calvo, L; Gatica, M C; Guzmán, J L; Zarazaga, L A

    2014-12-30

    The reproductive activity of 84 female Blanca Andaluza goats was monitored over 17 months to determine the role of body condition score (BCS) and body weight (BW) in its control. Following a 3×2 factorial experimental design, the animals were allocated to three groups: low BCS (≤2.50, n=24), medium BCS (BCS=2.75-3.00, n=31) and high BCS (≥3.25, n=29). The same animals, irrespective of the BCS group categorization, were also divided into two groups depending on BW: low BW (≤40kg, n=44) and high BW (>40kg, n=40). Oestrus was evaluated daily using vasectomised males. The ovulation rate was assessed by trans-rectal ultrasonography after the identification of oestrus. Ovulations were determined by monitoring the plasma progesterone concentration weekly. The BCS and BW were recorded once a week and nutritional status adjusted to maintain the initial differences in BW and BCS between the groups. Both BCS and BW had a significant (at least Preproductive activity recorded in does with a BCS of ≥2.75 and BW of >40kg. No significant interaction between these variables was observed. Some (11.7%) of the does in the groups with animals of BCS≥2.75 had ovulations during seasonal anoestrus. None of the does with a BCS of ≤2.5 had ovulations during seasonal anoestrus. The ovulation rate of the first and last oestrus was influenced by BW (Preproductive seasonality that is clearly and independently modulated by BCS and BW. Copyright © 2014 Elsevier B.V. All rights reserved.

  14. Monitoring tropical debris-covered glacier dynamics from high-resolution unmanned aerial vehicle photogrammetry, Cordillera Blanca, Peru

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    O. Wigmore

    2017-11-01

    Full Text Available The glaciers of the Cordillera Blanca, Peru, are rapidly retreating and thinning as a result of climate change, altering the timing, quantity and quality of water available to downstream users. Furthermore, increases in the number and size of proglacial lakes associated with these melting glaciers is increasing potential exposure to glacier lake outburst floods (GLOFs. Understanding how these glaciers are changing and their connection to proglacial lake systems is thus of critical importance. Most satellite data are too coarse for studying small mountain glaciers and are often affected by cloud cover, while traditional airborne photogrammetry and lidar are costly. Recent developments have made unmanned aerial vehicles (UAVs a viable and potentially transformative method for studying glacier change at high spatial resolution, on demand and at relatively low cost.Using a custom designed hexacopter built for high-altitude (4000–6000 m a. s. l.  operation, we completed repeat aerial surveys (2014 and 2015 of the debris-covered Llaca Glacier tongue and proglacial lake system. High-resolution orthomosaics (5 cm and digital elevation models (DEMs (10 cm were produced and their accuracy assessed. Analysis of these datasets reveals highly heterogeneous patterns of glacier change. The most rapid areas of ice loss were associated with exposed ice cliffs and meltwater ponds on the glacier surface. Considerable subsidence and low surface velocities were also measured on the sediments within the pro-glacial lake, indicating the presence of extensive regions of buried ice and continued connection to the glacier tongue. Only limited horizontal retreat of the glacier tongue was observed, indicating that measurements of changes in aerial extent alone are inadequate for monitoring changes in glacier ice quantity.

  15. Unraveling Tropical Mountain Hydroclimatology by Coupling Autonomous Sensor Observations and Climate Modeling: Llanganuco Valley, Cordillera Blanca, Peru.

    Science.gov (United States)

    Hellstrom, R. A.; Fernandez, A.; Mark, B. G.; Covert, J. M.

    2015-12-01

    Northern Peru will face critical water resource issues in the near future as permanent ice retreats. Much of current global and regional climate research neglects the meteorological forcing of lapse rates and valley wind dynamics on critical components of the Peruvian Andes' water-cycle. In 2004 and 2005 we installed an autonomous sensor network (ASN) within the glacierized Llanganuco Valley, Cordillera Blanca (9°S), consisting of discrete, cost-effective, automatic temperature loggers located along the valley axis and anchored by two automatic weather stations. Comparisons of these embedded atmospheric measurements from the ASN and climate modeling (CM) by dynamical downscaling using the Weather Research and Forecasting (WRF) model elucidate distinct diurnal and seasonal characteristics of the mountain valley winds and lapse rates. Wind, temperature, humidity, and cloud simulations by WRF suggest that thermally driven valley winds converging with easterly flow aloft enhance late afternoon and evening cloud development which helps explain detected nocturnal precipitation maxima measured by the ASN. We attribute sustained evapotranspiration (ET), as estimated by the FAO-56 Penman-Monteith model, to an abundance of glacial melt-water during the dry season and strong pre-noon solar heating during the wet season. Furthermore, the extreme diurnal variability of along-valley-axis lapse rates and valley wind detected from ground observations and confirmed by dynamical downscaling demonstrate the importance of realistic scale parameterizations of the boundary layer to improve regional CM projections in mountainous regions. Our findings portray ET as an integral yet poorly represented process in Andean hydroclimatology. We show that coupling ASN and CM can improve understanding of multi-scale atmospheric and associated hydrological processes in mountain valleys.

  16. Diferentes niveles de energía metabolizable y aminoácidos azufrados en dietas para gallinas Bovans blancas

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    María de los Ángeles Tepox Pérez

    2012-01-01

    Full Text Available Con el objeto de evaluar el comportamiento productivo de la gallina Bovans blanca de primer ciclo alimentadas con dietas con niveles diferentes de energía metabolizable (EM y de metionina+cistina digestible (AAD, para lograr disminuir el porcentaje de huevo pequeño (<42 g, al inicio de la producción se utilizaron 384 gallinas de 19 semanas de edad. Se usó un diseño completamente al azar, en un arreglo factorial de 4 X 2, donde el primer factor fueron los niveles de EM (2700, 2800, 2900, 3000 Kcal/kg y el segundo factor fue la inclusión de diferentes porcentajes de AAD (0.45, 0.61. Cada tratamiento, contó con cuatro repeticiones de 12 gallinas cada uno. Durante ocho semanas se llevaron registros semanales, del porcentaje de postura, peso promedio del huevo, consumo de alimento; masa de huevo/ave/día y conversión alimenticia; además, se clasificó el huevo de acuerdo al peso. Los resultados obtenidos, no mostraron respuesta a los factores de estudio ni a la interacción entre nivel de EM y AAD, para ninguna de las variables productivas. Se encontró un efecto sobre el consumo de alimento del nivel de energía y aminoácidos azufrados (P<0.05. Se disminuyó el porcentaje de huevo pequeño en los niveles más altos de EM de 2900 y 3000 Kcal/Kg (29.6 y 30.4 % respectivamente. Se incrementó (P<0.05 el porcentaje de huevo grande en 3 % al usar dietas con el nivel de AAD de 0.61 %.

  17. EVALUACIÓN DE ACTIVIDADES ENDOGLUCANASA, EXOGLUCANASA, LACASA Y LIGNINA PEROXIDASA EN DIEZ HONGOS DE PUDRICIÓN BLANCA

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    SANDRA MONTOYA B.

    Full Text Available Este trabajo presenta una vía de rastreo de producción de enzimas lignocelulolíticas en diez especies de hongos de pudrición blanca: Lentinula edodes, Schizophyllum commune, Trametes trogii, Coriolus versicolor, Pycnoporus sanguineus, Ganoderma applanatum, Ganoderma lucidum, Grifola frondosa, Pleurotus ostreatus y Auricularia delicata. Estas especies primero fueron rastreadas sobre medios de cultivo sólido que contienen carboximetil celulosa, celulosa cristalina, ABTS (2,2´-azino-bis(3-etilbenzotiazolina-6-sulfonato y azure B, los cuales evidenciaron la producción de las enzimas endoglucanasa, exoglucanasa, lacasa y lignina peroxidasa (LiP. Las actividades celulolíticas fueron detectadas a los cinco días de incubación con el indicador rojo congo, formándose un halo claro-blanco en las zonas donde se degrada la celulosa. Para las ligninasas, este rastreo consistió en el seguimiento a la formación de halos verdes por oxidación del ABTS para lacasa y halos de decoloración sobre el azure B para la LiP durante 14 días de incubación. De este rastreo cualitativo, se seleccionaron cuatro cepas (G. lucidum, L. edodes, C. versicolor y T. Trogii, como las mejores productoras de enzimas celulolíticas y ligninolíticas. Estas cuatro especies fueron inoculadas sobre un sustrato de aserrín de roble, obteniéndose 51,8% de lignina degradada por L. edodes y 22% de celulosa degrada por C. versicolor.

  18. Sources, Ages, and Alteration of Organic Matter in Estuaries.

    Science.gov (United States)

    Canuel, Elizabeth A; Hardison, Amber K

    2016-01-01

    Understanding the processes influencing the sources and fate of organic matter (OM) in estuaries is important for quantifying the contributions of carbon from land and rivers to the global carbon budget of the coastal ocean. Estuaries are sites of high OM production and processing, and understanding biogeochemical processes within these regions is key to quantifying organic carbon (Corg) budgets at the land-ocean margin. These regions provide vital ecological services, including nutrient filtration and protection from floods and storm surge, and provide habitat and nursery areas for numerous commercially important species. Human activities have modified estuarine systems over time, resulting in changes in the production, respiration, burial, and export of Corg. Corg in estuaries is derived from aquatic, terrigenous, and anthropogenic sources, with each source exhibiting a spectrum of ages and lability. The complex source and age characteristics of Corg in estuaries complicate our ability to trace OM along the river-estuary-coastal ocean continuum. This review focuses on the application of organic biomarkers and compound-specific isotope analyses to estuarine environments and on how these tools have enhanced our ability to discern natural sources of OM, trace their incorporation into food webs, and enhance understanding of the fate of Corg within estuaries and their adjacent waters.

  19. Wind Wave Behavior in Fetch and Depth Limited Estuaries

    Science.gov (United States)

    Karimpour, Arash; Chen, Qin; Twilley, Robert R.

    2017-01-01

    Wetland dominated estuaries serve as one of the most productive natural ecosystems through their ecological, economic and cultural services, such as nursery grounds for fisheries, nutrient sequestration, and ecotourism. The ongoing deterioration of wetland ecosystems in many shallow estuaries raises concerns about the contributing erosive processes and their roles in restraining coastal restoration efforts. Given the combination of wetlands and shallow bays as landscape components that determine the function of estuaries, successful restoration strategies require knowledge of wind wave behavior in fetch and depth limited water as a critical design feature. We experimentally evaluate physics of wind wave growth in fetch and depth limited estuaries. We demonstrate that wave growth rate in shallow estuaries is a function of wind fetch to water depth ratio, which helps to develop a new set of parametric wave growth equations. We find that the final stage of wave growth in shallow estuaries can be presented by a product of water depth and wave number, whereby their product approaches 1.363 as either depth or wave energy increases. Suggested wave growth equations and their asymptotic constraints establish the magnitude of wave forces acting on wetland erosion that must be included in ecosystem restoration design.

  20. Morbidade em candidatos a emprego na região metropolitana de Salvador, Bahia, Brasil Morbidity among job applicants in Greater Metropolitan Salvador, Bahia, Brazil

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    Vilma S. Santana

    2001-02-01

    Full Text Available O objetivo deste estudo transversal é avaliar o perfil de morbidade de candidatos a emprego, através de estimativas de prevalência de alterações de exames laboratoriais, dados da anamnese clínica e do laudo médico ocupacional sobre a aptidão para o trabalho. A população do estudo se constitui de 1.237 trabalhadores do sexo masculino, selecionados aleatoriamente através de prontuários médicos de um Serviço de Medicina Ocupacional de Salvador-Bahia, no período entre 1988 e 1996. Apenas dados de exames admissionais foram utilizados. As enfermidades mais encontradas foram infecções parasitárias (51,7%, anemias (12,8% e hipertensão arterial (12,7%, enquanto que o sobrepeso atingiu 24,7% da população do estudo. Motoristas apresentaram altas prevalências de sobrepeso (38,2% e hipertensão arterial (16,2%. Programas de higiene e segurança no trabalho necessitam enfocar, além de riscos e doenças ocupacionais, as mais comuns enfermidades e riscos, que nesta população foram aqueles típicos das más condições de vida. Atenção especial para a prevenção de doenças cardiovasculares deve ser dirigida a motoristas.This cross-sectional study evaluates the pre-employment health status of job applicants, based on prevalence estimates of abnormal laboratory test results, clinical diagnosis, and a physician-signed fit-for-work assessment, which is mandatory in Brazil. The study population was a random sample of 1,237 male workers selected from medical records (1988-1996 from an Occupational Medical Center located in Salvador, the capital of Bahia State, Brazil. The data were from a single pre-employment medical assessment for each individual. The most common diseases were intestinal parasites (51.7%, anemia (12.8%, and hypertension (12.7%. Drivers showed a high prevalence of overweight (38.2% and hypertension (16.2%. In addition to work-related risks and diseases, occupational hygiene and safety programs need to address prevailing

  1. Etiologia do declínio de mangostanzeiros no sul da Bahia Etiology of the decline of mangosteen in the southern Bahia

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    Eduardo César Araújo Paim

    2012-12-01

    Full Text Available O declínio do mangostanzeiro (Garcinia mangostana L. no litoral sul do Estado da Bahia é hoje o principal problema da cultura, sendo caracterizado por sintomas de murcha, amarelecimento, seca e queda de folhas. Este trabalho teve como objetivo acompanhar a evolução da sintomatologia da doença, isolar e identificar os potenciais patógenos causadores do declínio do mangostanzeiro. A doença começa com a necrose das radículas, a qual atinge as raízes secundárias, primárias e progride até à base do tronco que desenvolve lesões necróticas extensas. Os sintomas secundários são clorose, murcha e queda das folhas. Das amostras de tecidos lesionados de plantas doentes levadas ao laboratório, foram isolados e identificados os seguintes fungos: Lasiodiplodia theobromae, Lasiodiplodia parva, Mycoleptodiscus sp., Rhizopus sp., Stilbella sp., Trichoderma spp. e Aspergillus sp. Apenas L. theobromae e L. parva foram patogênicas a fragmentos de raízes e caules de mangostanzeiros in vitro e a mudas de mangostanzeiros em casa de vegetação, sendo o isolado da primeira espécie o mais virulento. A taxonomia do gênero Lasiodiplodia e algumas condições que influenciam no desenvolvimento da doença no campo foram analisadas.The decline of mangosteen (Garcinia mangostana L. in the southern coast of the state of Bahia is today the main problem of the culture, being characterized by symptoms of wilting, yellowing, blight and defoliation. This study was aimed to follow the evolution of the symptoms of the disease, isolate and identify the possible pathogen of mangosteen decline. The disease begins in the roots and progresses toward the canopy, leading to plant death. Samples of infected tissue from diseased plants were taken to laboratory where the following fungal species were isolated and identified: Lasiodiplodia theobromae, L. parva, Mycoleptodiscus sp., Rhizopus sp., Stilbella sp., Aspergillus sp. and Trichoderma spp. Only Lasiodiplodia

  2. Probable movement and mixing of contaminants in tidal estuaries - A field study in Kundalika Estuary, west coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    DineshKumar, P.K.; Sarma, R.V.; Zingde, M.D.

    The probable movement and mixing of contaminants within and through the Kundalika river estuary along the west coast of India are studied Neutrally buoyant biplane drogues, floats and dye were tracked at different stages of the tide to assess...

  3. Infestation of Palm Trees by Triatomines (Hemiptera: Reduviidae in the State of Bahia, Brazil

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    Rodrigo Gurgel-Gonçalves

    2012-12-01

    Resumo. As palmeiras desempenham papéis importantes como habitats de reprodução e alimentação para triatomíneos silvestres, vetores da doença de Chagas. A ocorrência de triatomíneos em palmeiras peridomiciliares pode aumentar o risco de invasão desses insetos em domicílios e deve ser considerada para desenvolver estratégias de prevenção. Com objetivo de investigar a infestação de palmeiras por triatomíneos no Estado da Bahia e determinar a infecção natural desses insetos por Trypanosoma spp., foram amostradas 183 palmeiras em 12 municípios entre 2006 e 2011 utilizando captura manual e/ou armadilhas adesivas iscadas com camundongos. Os triatomíneos foram detectados em 79 palmeiras (43% das espécies Copernicia prunifera (Mart. Becc., Mauritia flexuosa L. e Attalea spp. (Attalea burretiana Bondar ou Attalea salvadorensis Glassman. Em outras espécies de palmeiras (Syagrus coronata (Mill H.E. Moore, Attalea funifera Mart ex. Spreng e Elaeis guineensis Jacq não foram detectados triatomíneos. Rhodnius neglectus Lent, Triatoma sordida (Stål, e Triatoma pseudomaculata Corrêa & Espínola ocorreram em C. prunifera ao longo do rio São Francisco. No extremo oeste da Bahia, R. neglectus e Psammolestes tertius Lent & Jurberg foram detectados em M. flexuosa, enquanto Triatoma tibiamaculata (Pinto ocorreu em Attalea sp. em áreas urbanas de Salvador. No total, 180 triatomíneos foram capturados, principalmente R. neglectus. A maior taxa de infecção natural (61% foi observada em T. tibiamaculata. Os resultados indicam que pelo menos três espécies de palmeiras são habitats favoráveis para triatomíneos no estado da Bahia e ocorrem no ambiente peridomiciliar, o que pode aumentar a probabilidade de invasão de triatomíneos nas casas.

  4. NEW DATA ABOUT MACROZOOBENTHOS OF BEYSUGSKY ESTUARY (SEA OF AZOV

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    N. I. Bulysheva

    2013-01-01

    Full Text Available Abstract. Aim. Beysugsky Estuary is one of the biggest estuaries of the Azov-Kuban’ lowland. Like the other water bodies in the South of Russia, this one is subject to strong anthropogenic load: detachment of the freshwater part for establishing the Beysug spawning area; regulation of the flow of the rivers feeding the estuary; destruction of the Yasenskaya spit and narrowing of the Bugaz mouth; disorganized tourism. The ongoing reformation of the ecosystem makes it necessary to carry out the analyses of the modern state of the biota of this water body and uncover reasons and regularities of its change.Location. Beysug Estuary of the Sea of Azov.Methods. Quantitative zoobenthos samples were taken with the Petersen dredger (sampling area 0,034 m2 from board of the inflatable “Zodiac” boat. Qualitative samples were taken in the coastal zone by hand and with the dredge. All the samples taken were washed through the bag made of mill sieve with mesh size 0,5 mm, and then were fixed in a plastic bucket by 4 % formaldehyde (quantitative samples or 70 % ethyl alcohol (qualitative samples. Taking and processing of samples were carried out in field and laboratory environment using common methods. 22 samples at 7 stations were taken in total.Results. Macrozoobenthos was presented by 14 invertebrate species. Estuarine fauna is the depleted version of the euryhaline one of the Sea of Azov with Holocene relic macrophyte-dwelling elements. Biodiversity and quantitative characters of the estuarine communities decrease from west to east. Pelophylic detritophages predominated in the benthic communities of the estuary. The results of this research are meant to be used for uncovering historical ways of forming of benthic fauna and clearing up the dependence of community structure on the seawater influence, freshwater flow, regulation of freshwater and seawater sources, nature of changing of faunas at salinization of estuaries connected with the sea and the

  5. Distribution and assessment of sediment toxicity in Tamaki Estuary, Auckland, New Zealand

    Science.gov (United States)

    Abrahim, G. M. S.; Parker, R. J.; Nichol, S. L.

    2007-07-01

    Heavy metal levels in surface sediments from Tamaki Estuary demonstrate significant up estuary increases in Cu, Pb, Zn, Cd and mud concentrations. Increased metal levels towards the head of the estuary are linked to local catchment sources reflecting the historical development, industrialisation and urbanisation of catchment areas surrounding the upper estuary. The relatively narrow constriction in the middle estuary (Panmure area), makes it susceptible to accumulation of upper estuary pollutants, since the constriction reduces circulation and extends the time required for fine waterborne sediments in the upper estuary to exchange with fresh coastal water. As a result fine fraction sediments trapped in the upper estuary facilitate capture and retention of pollutants at the head of the estuary. The increase in sandy mud poor sediments towards the mouth of the estuary is associated with generally low metal concentrations. The estuary’s geomorphic shape with a mid estuary constriction, sediment texture and mineralogy and catchment history are significant factors in understanding the overall spatial distribution of contaminants in the estuary. Bulk concentration values for Cu, Pb, Zn, and Cd in all the studied surface samples occur below ANZECC ISQG-H toxicity values. Cd and Cu concentrations are also below the ISQG-L toxicity levels for these elements. However, Pb and Zn concentrations do exceed the ISQG-L values in some of the surface bulk samples in the upper estuary proximal to long established sources of catchment pollution.

  6. Inventário da fauna de Euglossinae (Hymenoptera, Apidae do baixo sul da Bahia, Brasil Inventory of the Euglossinae (Hymenoptera, Apidae fauna of southern Bahia, Brazil

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    Edinaldo Luz das Neves

    1997-12-01

    Full Text Available This paper reports the results concerning collection of Euglossinae bees in a mangrove ecosystem in Valença(13º22'08"S and 39º04'20"W, Bahia. These samples were made twice a month, for a year. The chemical baits Citronella, Eucalyptol, Eugenol, Metyl Salicylate and Vanillin attracted 1,144 specimens distributed among twelve species and two genera: Eulaema (Lepeletier, 1841 and Euglossa (Latreille, 1802. The predominam bee species was Eulaema nigrita (Lepeletier, 1841 consisting of 49.4% of the collected specimens, followed by Euglossa cordata (Linnaeus, 1758 with 44.88%, Euglossa imperialis (Cockerell, 1922 with 2.4% and Eulaema meriana flavescens (Friese, 1899 with 1.6%. Theothers species, considering sporadic visitors, Euglossa securigera (Dressler, 1982, Euglossa chalybeata (Friese, 1925, Euglossa liopoda (Dressler, 1982, Euglossa gaianii (Dressler, 1982, Euglossa townsendi (Cockerell, 1904, Euglossa truncata (Rebelo & Moure, 1995, Euglossa melanotricha (Moure, 1967 and Euglossa sapphirina (Moure, 1968 represented together only 1.8% of the total sample. The Euglossinae were more active from October to May. Eucalyptol was the most attractive bait, attracting 1,120 specimens. Methyl Salicylate attracted 17 specimens, followed by Eugenol, which attracted 04 specimens and Vanillin, which attracted 03 specimens. Citronella was not an attractive chemical.

  7. Avaliação da qualidade nutricional em espécies de pescado mais produzidas no Estado da Bahia Quality evaluate nutritional the fisches more consumed in State of Bahia - Brazil

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    Graciele de Queiroz Andrade

    2009-12-01

    Full Text Available Diversos fatores podem contribuir para a variabilidade na composição das diferentes espécies de pescado. Este trabalho teve como objetivo, identificar as espécies de pescado mais produzidas no Estado da Bahia, avaliar seu valor nutricional e realizar um levantamento das empresas beneficiadoras de pescado do Estado. Um questionário foi aplicado às beneficiadoras de pescado para a caracterização das empresas. Segundo a Bahia Pesca (2005, as espécies mais produzidas são: o camarão-rosa (Penaeus brasiliensis, representando 21,8% da produção estadual; a sardinha (Opisthonema oglinum, 10,2%; os vermelhos com as espécies guaiúba (Ocyurus chrysurus e o ariacó (Lutjanus synagris, 6,6%; seguidos pela tainha (Mugil spp., 4,1%. De acordo com o valor nutricional das espécies analisadas, a guaiúba foi considerada melhor para o consumo, por possuir menor teor de lipídios totais (0,82% e gordura saturada (28,74%. A produção de 43% das beneficiadoras de pescado do Estado da Bahia está entre 10 e 50 ton/mês e a principal dificuldade apresentada foi a falta de investimento do governo no setor.Several factors can contribute to the variability in the composition of the different species of fish. The objective of this work was to identify the most frequently consumed fish species in the State of Bahia to evaluate their nutritional value and to compile a list of fish processing companies in the State. A questionnaire was applied to the companies to characterize them. According to Bahia Pesca (2005, the most frequently consumed species are the shrimp-rose (Penaeus brasiliensis, accounting for 21.8% of the state production, the sardine (Opisthonema oglinum,10.2%, and the reds, especially guaiúba (Ocyurus chrysurus and ariacó (Lutjanus synagris, 6.6%, followed by the mullet (Mugil spp., 4.1%, respectively. Considering the nutritional value of the analyzed fish, the guaiúba was considered the best for consumption due to its smaller content of

  8. Novas ocorrências de desmídias filamentosas (Desmidiaceae, Zygnematophyceae para o estado da Bahia, Brasil New records of filamentous desmids (Desmidiaceae, Zygnematophyceae from Bahia state, Brazil

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    Ivania Batista de Oliveira

    2010-12-01

    Full Text Available As desmídias de hábito filamentos são constituídas por filamentos de células relativamente curtos, que se dissociam com certa facilidade. O conhecimento destas algas no estado da Bahia é bastante escasso, até o momento, estando restrito a 13 táxons. O presente trabalho teve por objetivo realizar o inventário taxonômico dos gêneros filamentosos da família Desmidiaceae (Zygnematophyceae, de duas áreas de proteção ambiental, APA Rio Capivara e APA Lagoas de Guarajuba, município de Camaçari, a fim de ampliar o conhecimento destes na Bahia. Foram analisadas 33 amostras coletadas de acordo com os métodos usuais empregados nos estudos de taxonomia de microalgas continentais. Foram identificados 15 táxons distribuídos em sete gêneros (Bambusina Kütz. ex Kütz, Desmidium C.Agardh ex Ralfs, Groenbladia Teiling, Hyalotheca Ehrenb. ex Ralfs, Onychonema Wallich, Spondylosium Bréb. ex Kütz. e Teilingia Bourr., dos quais nove táxons constituem-se adições à flora de algas continentais da Bahia, aumentando o total de espécies conhecidas para 22.The filamentous desmids are composed of relatively short filaments of cells that dissociate rather easily. These algae are poorly known today in the state of Bahia, being restricted to 13 taxa. This study aimed to do a taxonomic inventory of filamentous genera of the family Desmidiaceae (Zygnematophyceae from two environmental protection areas, Rio Capivara and Lagoas de Guarajuba, Camaçari municipality, to increase our knowledge of these organisms in Bahia. We analyzed 33 samples collected according to the methods employed in studies of continental microalgae taxonomy. 15 taxa were recorded, distributed in seven genera: Bambusina Kütz. ex Kütz, Desmidium C.Agardh ex Ralfs, Groenbladia Teiling, Hyalotheca Ehrenb. ex Ralfs, Onychonema Wallich, Spondylosium Bréb. ex Kütz. and Teilingia Bourr. Of these, nine are additions to the algal flora of continental Bahia, increasing the total to 22

  9. Empirical-statistical downscaling of reanalysis data to high-resolution air temperature and specific humidity above a glacier surface (Cordillera Blanca, Peru)

    Science.gov (United States)

    Hofer, Marlis; MöLg, Thomas; Marzeion, Ben; Kaser, Georg

    2010-06-01

    Recently initiated observation networks in the Cordillera Blanca (Peru) provide temporally high-resolution, yet short-term, atmospheric data. The aim of this study is to extend the existing time series into the past. We present an empirical-statistical downscaling (ESD) model that links 6-hourly National Centers for Environmental Prediction (NCEP)/National Center for Atmospheric Research (NCAR) reanalysis data to air temperature and specific humidity, measured at the tropical glacier Artesonraju (northern Cordillera Blanca). The ESD modeling procedure includes combined empirical orthogonal function and multiple regression analyses and a double cross-validation scheme for model evaluation. Apart from the selection of predictor fields, the modeling procedure is automated and does not include subjective choices. We assess the ESD model sensitivity to the predictor choice using both single-field and mixed-field predictors. Statistical transfer functions are derived individually for different months and times of day. The forecast skill largely depends on month and time of day, ranging from 0 to 0.8. The mixed-field predictors perform better than the single-field predictors. The ESD model shows added value, at all time scales, against simpler reference models (e.g., the direct use of reanalysis grid point values). The ESD model forecast 1960-2008 clearly reflects interannual variability related to the El Niño/Southern Oscillation but is sensitive to the chosen predictor type.

  10. Relación masa-radio para estrellas enanas blancas y la interpretación de recientes mediciones hechas por Hipparcos

    Science.gov (United States)

    Panei, J. A.; Althaus, L. G.; Benvenuto, O. G.

    Recientes mediciones de la masa y el radio hechas por Hipparcos de las estrellas enanas blancas 40 Eri B y Procyon B (Shipman, H. & Provencal, J. - ApJ. 1998, 494, 759), sugieren un núcleo compuesto de hierro para dichas estrellas, en lugar de carbono y oxígeno como predice la teoría standard de evolución estelar. Para interpretar estas observaciones, presentamos aquí, relaciones masa-radio para configuraciones degeneradas a temperatura finita para distintas composiciones químicas centrales. Para tal fin hemos calculado secuencias evolutivas de enanas blancas utilizando el código de evolución estelar, desarrollado en el Observatorio de La Plata. Dicho código resuelve las ecuaciones de estructura y evolución estelar mediante la técnica de relajación de Henyey, y esta basado en una descripción física muy detallada y actualizada.

  11. ESTUDIO COMPARATIVO DE LOS COMPUESTOS VOLÁTILES DE TRES VARIEDADES DE GUAYABA BLANCA (Psidium guajava L. DURANTE SU MADURACIÓN

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    Johanna Cantillo

    2011-05-01

    Full Text Available Regional Blanca (RB y Ráquira (RQ. Seutilizó el método Headspace-Microextracciónen Fase Sólida (HS-MEFS paracomparar los perfiles olfativos de tres variedadesde guayaba blanca de la regiónde la hoya del río Suárez (Santander, Colombiadurante tres etapas de maduración(verde, pintón y maduro. En las tresvariedades se presentó un comportamientosimilar, los aldehídos C-6 (hexanal,(Z-3-hexenal y (E-2-hexenal responsablesde la nota verde disminuyen durantela maduración, mientras que el contenidode ésteres (acetato de hexilo y acetato de(Z-3-hexenilo aumenta produciéndoselas notas dulce y frutal características dela fruta madura. Los compuestos ácidos,furánicos y alcoholes se observan en bajasproporciones durante las tres etapas.El análisis de los compuestos volátilesmediante HS-MEFS permitió estableceruna relación entre la transformación decompuestos aldehídos C6, responsablesde la nota verde, en ésteres análogos, alos cuales se les atribuye la nota frutalcaracterística durante el proceso demaduración.

  12. Urban microbial ecology of a freshwater estuary of Lake Michigan.

    Science.gov (United States)

    Fisher, Jenny C; Newton, Ryan J; Dila, Deborah K; McLellan, Sandra L

    Freshwater estuaries throughout the Great Lakes region receive stormwater runoff and riverine inputs from heavily urbanized population centers. While human and animal feces contained in this runoff are often the focus of source tracking investigations, non-fecal bacterial loads from soil, aerosols, urban infrastructure, and other sources are also transported to estuaries and lakes. We quantified and characterized this non-fecal urban microbial component using bacterial 16S rRNA gene sequences from sewage, stormwater, rivers, harbor/estuary, and the lake surrounding Milwaukee, WI, USA. Bacterial communities from each of these environments had a distinctive composition, but some community members were shared among environments. We used a statistical biomarker discovery tool to identify the components of the microbial community that were most strongly associated with stormwater and sewage to describe an "urban microbial signature," and measured the presence and relative abundance of these organisms in the rivers, estuary, and lake. This urban signature increased in magnitude in the estuary and harbor with increasing rainfall levels, and was more apparent in lake samples with closest proximity to the Milwaukee estuary. The dominant bacterial taxa in the urban signature were Acinetobacter, Aeromonas , and Pseudomonas , which are organisms associated with pipe infrastructure and soil and not typically found in pelagic freshwater environments. These taxa were highly abundant in stormwater and sewage, but sewage also contained a high abundance of Arcobacter and Trichococcus that appeared in lower abundance in stormwater outfalls and in trace amounts in aquatic environments. Urban signature organisms comprised 1.7% of estuary and harbor communities under baseflow conditions, 3.5% after rain, and >10% after a combined sewer overflow. With predicted increases in urbanization across the Great Lakes, further alteration of freshwater communities is likely to occur with potential

  13. Urban microbial ecology of a freshwater estuary of Lake Michigan

    Directory of Open Access Journals (Sweden)

    Jenny C. Fisher

    2015-07-01

    Full Text Available Abstract Freshwater estuaries throughout the Great Lakes region receive stormwater runoff and riverine inputs from heavily urbanized population centers. While human and animal feces contained in this runoff are often the focus of source tracking investigations, non-fecal bacterial loads from soil, aerosols, urban infrastructure, and other sources are also transported to estuaries and lakes. We quantified and characterized this non-fecal urban microbial component using bacterial 16S rRNA gene sequences from sewage, stormwater, rivers, harbor/estuary, and the lake surrounding Milwaukee, WI, USA. Bacterial communities from each of these environments had a distinctive composition, but some community members were shared among environments. We used a statistical biomarker discovery tool to identify the components of the microbial community that were most strongly associated with stormwater and sewage to describe an “urban microbial signature,” and measured the presence and relative abundance of these organisms in the rivers, estuary, and lake. This urban signature increased in magnitude in the estuary and harbor with increasing rainfall levels, and was more apparent in lake samples with closest proximity to the Milwaukee estuary. The dominant bacterial taxa in the urban signature were Acinetobacter, Aeromonas, and Pseudomonas, which are organisms associated with pipe infrastructure and soil and not typically found in pelagic freshwater environments. These taxa were highly abundant in stormwater and sewage, but sewage also contained a high abundance of Arcobacter and Trichococcus that appeared in lower abundance in stormwater outfalls and in trace amounts in aquatic environments. Urban signature organisms comprised 1.7% of estuary and harbor communities under baseflow conditions, 3.5% after rain, and >10% after a combined sewer overflow. With predicted increases in urbanization across the Great Lakes, further alteration of freshwater communities is

  14. Urban microbial ecology of a freshwater estuary of Lake Michigan

    Science.gov (United States)

    Fisher, Jenny C.; Newton, Ryan J.; Dila, Deborah K.

    2015-01-01

    Freshwater estuaries throughout the Great Lakes region receive stormwater runoff and riverine inputs from heavily urbanized population centers. While human and animal feces contained in this runoff are often the focus of source tracking investigations, non-fecal bacterial loads from soil, aerosols, urban infrastructure, and other sources are also transported to estuaries and lakes. We quantified and characterized this non-fecal urban microbial component using bacterial 16S rRNA gene sequences from sewage, stormwater, rivers, harbor/estuary, and the lake surrounding Milwaukee, WI, USA. Bacterial communities from each of these environments had a distinctive composition, but some community members were shared among environments. We used a statistical biomarker discovery tool to identify the components of the microbial community that were most strongly associated with stormwater and sewage to describe an “urban microbial signature,” and measured the presence and relative abundance of these organisms in the rivers, estuary, and lake. This urban signature increased in magnitude in the estuary and harbor with increasing rainfall levels, and was more apparent in lake samples with closest proximity to the Milwaukee estuary. The dominant bacterial taxa in the urban signature were Acinetobacter, Aeromonas, and Pseudomonas, which are organisms associated with pipe infrastructure and soil and not typically found in pelagic freshwater environments. These taxa were highly abundant in stormwater and sewage, but sewage also contained a high abundance of Arcobacter and Trichococcus that appeared in lower abundance in stormwater outfalls and in trace amounts in aquatic environments. Urban signature organisms comprised 1.7% of estuary and harbor communities under baseflow conditions, 3.5% after rain, and >10% after a combined sewer overflow. With predicted increases in urbanization across the Great Lakes, further alteration of freshwater communities is likely to occur with

  15. Ciclo reproductivo del ostión de manglar Crassostrea rhizophorae (Bivalvia: Ostreidae en la Bahía de Camamu, Bahia, Brasil

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    Tiago Lenz

    2011-03-01

    Full Text Available El ostión de manglar es un importante recurso pesquero que se distribuye por toda la costa brasileña y una de las especies nativas con mayor potencial para maricultura. Este estudio tuvo como objetivo conocer las características reproductivas del ostión de manglar Crassostrea rhizophorae en el estero del Río Maraú, Bahía de Camamu, Bahia, Brasil. Las muestras fueran recolectadas mensualmente, entre agosto de 2006 y septiembre de 2007, en dos sitios. Las metodologías utilizadas fueron el análisis histológico de las gónadas y el cálculo de rendimiento de carne. La temperatura del agua durante el período de estudio varió de 23.5°C a 30°C y la salinidad osciló entre 15 y 35ups. La altura de los ostiones examinados varió de 27 a 102mm (n=437. Hubo predominancia de hembras en las poblaciones de ambos sitios. Los análisis de estadios gonádicos demostraron que el proceso de reproducción de C. rhizophorae en el estero del Río Maraú es continuo durante el año, sin período de reposo sexual. El rendimiento de carne (R fue de 8.0% a 17.7% (n=669. Los resultados de este estudio proveen informaciones para la captación de semilla e implantación de la ostricultura en la Bahía de Camamu.Reproductive cycle of the mangrove oyster Crassostrea rhizophorae (Bivalvia: Ostreidae in Camamu Bay, Bahia, Brasil. The mangrove oyster Crassostrea rhizophorae is important fishery resource along the entire Brasilian coast with excellent potential for marine culture. The purpose of this paper was to examine the reproductive characteristics of the oyster of the Maraú river estuary in Camamu Bay, Bahia, Brasil. The samples were collected monthly, from September 2006 to August 2007, at two points (I and II in Camamu Bay. At each site 20 oysters were collected for histological analysis, fixed in Davidson’s solution, embedded in paraffin, dehydrated in an ethanol series, sectioned (7μm thick and stained with Harris hematoxylin and Eosin (HE

  16. Intersections between tourism market and marketing of sex in Salvador, Bahia, Brazil

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    Cassiana Gabrielli

    2011-09-01

    Full Text Available This essay presents some issues for discussion about the relationship between the tourist market and the sex trade in the city of Salvador, capital of Bahia State, situated in northeastern Brazil, focusing particular attention to the issue of gender relationships. Whereas tourism an important social mediator, it is proposed, based on some observations made in interviews with ten sex workers working in this city sights, dialoguing with other researchers of this theme, on the social and cultural relations between tourists and native, which may reflect elements of a broader reality, and through the interpretation of the ways in which the relationships between those involved in such a context are developed on the tourism and especially about his bias known as sexual tourism. It's worth noting that in the discussions presented here, we discuss only the female heterosexual prostitution.

  17. Immunological inquiry for the epidemiology of leptospirosis in Canis familiaris in Salvador, Bahia, Brazil.

    Science.gov (United States)

    Caldas, E M; Doria, J D; Martins, M A

    1977-12-01

    A total of 430 dogs were immunologically examined in Salvador, Bahia, Brazil, and 21.6% of them were positive. The animals were selected through an aleatory pattern, according to the division of the City in 18 residential zones a division which had been established by the vaccination campaign against canis hydrophobia. The serotypes icterohemorrhagiae and canicola were the most frequently registered. Between the sexes, the male presented the highest index of positivity, though the difference wasn't statistically significant. The period of age ranging from 12 to 48 months comprised 67.7% of the investigations. Mestizo dogs presented a higher frequency of positivity than any other race and the areas of Nordeste de Amaralina, Liberdade and Quintas showed the greatest percentages of positive dogs.

  18. Petrology and geochemistry of the marbles and calcosilicated rocks from Ipira, Bahia - Brazil

    International Nuclear Information System (INIS)

    Oliveira, M.A.F.T. de.

    1976-01-01

    This work explains a study of marbles and diopsitites from Serra das Panelas, Ipira, Bahia, Brazil. Petrographic analysis, chemistry some elements, trace elements and rare earths, isotopic analysis of Strontium, carbon and oxigen, and geochronological determinations were done. The ages founded correspond to Transamazonic Orogenetic cicle, with Archean age, confirmed by the 18 O values found, which give to marble, ages about 2.500 my. The mineralogy and the texture give to marble an invulgar aspect, making a confusion with carbonate. The petrochemical data and the geochemistry of 13 C and 18 O isotopes showed that the marble and diopsitites was formed from the old marine carbonates. The geochemistry of rare earth suggests a strong correlation with carbonitic and alkaline rocks. An hybrid origem to this rocks is proposed. (C.D.G.) [pt

  19. Hydrogeologic characterization of the Cachoeira Deposit Massif, Caetite, state of Bahia, Brazil

    International Nuclear Information System (INIS)

    Bottura, J.A.; Albuquerque Filho, J.L.; Ojima, L.M.

    1984-01-01

    The hydrogeologic applications for the characterization of rock massifs in future mining activity areas are presented. The study was performed in the Cachoeira uranium deposit (Anomaly no.13 - Lagoa Real Project) located in the south-central portion of the state of Bahia, Caetite municipality, belonging to the Brazilian Nuclear Enterprise - NUCLEBRAS. The massif occuring in the area is composed of a group or series of rocks classified generically as gneisses, displaying different geotechnical classes. In order to consubstantiate the hydrogeologic/ hydrogeotechnical characterization, pumping and infiltration tests were performed, as well as periodic water level measurements in piezometers and drill-holes. In this manner, a hydrogeotechnical classification was made possible and a quantitative evaluation of the volume of water that will be drained was elaborated, orviding necessary contributions for research diggings and exploration. (D.J.M.) [pt

  20. [Evaluation of dental care coverage in the State Military Police in Salvador, Bahia, Brazil].

    Science.gov (United States)

    Ribeiro-Sobrinho, Clóvis; Souza, Luís Eugênio Portela Fernandes de; Chaves, Sônia Cristina Lima

    2008-02-01

    This study seeks to evaluate dental care coverage in the State Military Police in Salvador, Bahia State, Brazil, from 2002 to 2004, estimating potential and real coverage rates. A single descriptive study was performed. Calculations were made of potential coverage rates considering hourly workloads of staff dentists and the real rates resulting from actual outpatient treatment. Potential human resources coverage was adequate (1 dentist per 1,618 policemen), while the real coverage rate was considered below the standard proposed by the Brazilian Ministry of Health (0.39 procedures per policeman per year). The low real coverage rate could be related to low productivity, the reasons for which should be investigated in greater depth in future studies, and might include organizational problems and lack of a management system to improve the quality of professional practice, with specifically defined targets.

  1. Articulações políticas indígenas no sul da Bahia

    OpenAIRE

    Freire, Ricardo Sallum

    2016-01-01

    Os povos indígenas no Brasil têm se organizado social e politicamente diante dos atuais desafios impostos à reapropriação de seus territórios tradicionais e à manutenção dos direitos até então conquistados. No período histórico presente, em que se configura amplamente um meio geográfico técnico-científico-informacional, suas disputas territoriais ganham novos contornos e significados. Inseridos nesse contexto, os povos Tupinambá, Pataxó e Pataxó Hãhãhãe, no sul da Bahia, vêm constituindo sign...

  2. Interdisciplinary Bachelor Degrees in Federal University of Bahia: a review of the Project implementation

    Directory of Open Access Journals (Sweden)

    Monica Lima

    2015-11-01

    Full Text Available We discuss conceptual framework, operational perspective and political-institutional features of the Interdisciplinary Bachelor Degree (BI implementation in the Federal University of Bahia, between 2009 and 2012, as compared to existing university education models which, until then, only offered disciplinary professional courses. We analyze narratives of key agents of the process, three UFBA teachers who performed administrative functions, and a BI student, engaged in the student movement. We have concluded that the perspective for the BI to become the first cycle at UFBA is on hold; support and resistance movements have accompanied it, suggesting large institutional challenges. However, the experience has led to a vigorous revision of rules and regulations naturalized for a long time and enabled reflections on the traditional concept of university education in Brazil.

  3. [Scorpion stings in an area of Nordeste de Amaralina, Salvador, Bahia, Brazil].

    Science.gov (United States)

    de Amorim, Andréa Monteiro; Carvalho, Fernando Martins; Lira-da-Silva, Rejâne Maria; Brazil, Tania Kobler

    2003-01-01

    An epidemiological study was undertaken to determine the prevalence of individuals who referred scorpion sting accidents in a population sample from Areal, a neighborhood northeast of Amaralina, Salvador City, State of Bahia, Brazil. A random, systematic sample of 1,367 individuals was taken, corresponding to 44.4% of the total population. Eighty-two residents referred scorpion sting since they were resident in Areal, giving a prevalence coefficient of 6% (95% CI 4.7 - 7.3). The prevalence of persons stung by scorpions increased according to greater time spent in the domicile and more advanced age. It was remarkable that 92.7% of the scorpions stings occurred within the home. The incidence coefficient estimated for the most recent period of time (January to July, 2000) was 1.15 cases/1,000 inhabitants per month, comparable to the highest ever reported for an epidemic area.

  4. [The expression of sadness in a working class bairro in Salvador, Bahia, Brazil].

    Science.gov (United States)

    Costa, L A; Pereira, A M

    1995-01-01

    This paper examines the peculiarities of the expression of emotion in a poor neighborhood from Northeastern Brazil, the bairro of Nordeste de Amaralina, in Salvador, Bahia. Focusing on the expression of sadness, we built a scheme in which to understand how the informants perceive, identify, and deal with this emotion in the course of their daily lives. We attempted to reach an understanding of the wavs people in the bairro interpret sadness. In order to accomplish this goal. we built a semantic network which revealed three main clusters of emotional expression: the inner set, the bodily set, and the interactional set. We came to realize the various superpositions benween the universe of emotional expression and the local concept of person.

  5. BELIEFS AND RELIGIOUS PRACTICES OF AFRICAN BACKGROUND PRESENT IN BAHIA HONDA (PINAR DEL RÍO

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    Silfredo Rodríguez-Basso

    2016-01-01

    Full Text Available The present article is part of PhD thesis about the presence of the African legacy in the cultural identity of Bahia Honda, former municipality of Pinar del Rio province, Cuba until December 2010. With the systematization of the main beliefs and practices of this existent substratum (Santería, Palo Monte y Arará Magino, each component are analyzed based on a socio- cultural approach as an integrated part as the cultural identity in the province. Apart from “spiritism”, an expression that crosses and integrates the different religious manifestations, the main conclusion we could arrive in this work consists on the present specific peculiarities that have converted the religious in a representative universe of the cultural identity of this location in Pinar del Rio.

  6. Epidemiological profile of assaults in firearms and white gun inside of bahia

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    Felipe Santos Abreu

    2014-10-01

    Full Text Available The present study aimed to trace the epidemiological profile of firearm assaults and melee weapon, no period of 2009 to 2011, in a General Hospital not interior of Bahia. The analysis was performed using descriptive statistics and data presented as absolute and relative frequencies. From the results, 299 hospitalizations were due to aggression by firearms or bladed weapon, with the highest percentage of victims, young men, aged 20-29 years (39.5%. It is necessary the elaboration and implementation of public policies involving the various segments of civil society and organized to deal with this public health issue with a view to adoption of strategies for the prevention and reduction of morbidity and mortality rates.

  7. [Professional Burnout Syndrome of intensive care physicians from Salvador, Bahia, Brazil].

    Science.gov (United States)

    Tironi, Márcia Oliveira Staffa; Nascimento Sobrinho, Carlito Lopes; Barros, Dalton de Souza; Reis, Eduardo José Farias Borges; Marques Filho, Edson Silva; Almeida, Alessandro; Bitencourt, Almir; Feitosa, Ana Isabela Ramos; Neves, Flávia Serra; Mota, Igor Carlos Cunha; França, Juliana; Borges, Lorena Guimarães; Lordão, Manuela Barreto de Jesus; Trindade, Maria Valverde; Teles, Marcelo Santos; Almeida, Mônica Bastos T; Souza, Ygor Gomes de

    2009-01-01

    Describe prevalence of the Burnout syndrome in intensive care physicians of Salvador, associated to demographic data and aspects of the work environment (psychological demand and job control). This cross sectional study has investigated the association between work conditions and Burnout Syndrome in a population of 297 Intensive Care Physicians from Salvador, Bahia, Brazil. An individual, self-report questionnaire evaluated the physicians' psychological aspects of work, using the demand-control model (Job Content Questionnaire) and their mental health, using the Maslash Burnout Inventory (MBI). The study found work overload,a high proportion of on duty physicians and low income for the hours worked. Prevalence of the Burnout Syndrome was 7.4% and it was more closely associated with aspects of the job's psychological demand than with its control. Physicians under great stress (high demand and low control) presented prevalence of the Bornout Syndrome 10.2 times higher than those under low stress (low demand and high control) jobs.

  8. A quality assessment of crude palm oil marketed in Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    de Almeida, D. T.

    2013-09-01

    Full Text Available The characteristics of the quality of crude palm oil (CPO and crude palm olein (CPOL produced in the states of Bahia and Pará were investigated. Twelve oil samples were analyzed; 2 (CPO were from Pará (produced industrially, while the other 10 were from Bahia (3 CPOs and 3 CPOLs produced industrially, while 1 CPOL and 3 CPOs were traditionally processed. The chemical analyses included the determination of fatty acid methyl esters (FAME, free fatty acids (FFA%, peroxide value (PV, induction time (IT, total carotenoids (TC and total polar compounds (TPC. The major saturated fatty acids in these samples were palmitic (34.79-42.89 g 100 g–1 and stearic (4.49-5.84 g 100 g–1 acid, and the main unsaturated fatty acids were oleic (37.31-43.69 g 100 g–1 and linoleic (9.04- 12.74 g100 g–1 acid. All samples produced in Bahia exhibited higher FFA (6.77-13.49% and TPC (13.71-19.50% levels than permitted in the international quality standards, unlike the samples produced in Pará. TC, PV and IT ranged from 422.1 to 584.2 mg g–1, 1.32 to 3.7 meq O2 kg–1 oil and 1.72 to 4.66 h, respectively. PV, FFA and TPC were inversely correlated with TC and IT. The use of inappropriate oil extraction processes in Bahia is clearly becoming a food safety problem.Las características de calidad del aceite de palma crudo (CPO y oleína de palma cruda (CPOL producidos en los estados de Bahía y Pará fueron investigados. Se analizaron doce muestras de aceites; 2 (CPO eran de Pará (producido industrialmente, mientras que las otras 10 procedían de Bahía (3 CPOs y 3 CPOLs producidos industrialmente, mientras que 1 CPOL y 3 CPOs fueron procesadas tradicionalmente. El análisis químico incluyó la determinación de ésteres metílicos de ácidos grasos (FAME, ácidos grasos libres (FFA%, índice de peróxido (PV, el tiempo de inducción (TI, los carotenoides totales (TC y el total de compuestos polares (TPC. Los principales ácidos grasos saturados en estas muestras

  9. Helminths infecting the parthenogenetic whiptail lizard Cnemidophorus nativo in a restinga habitat of Bahia State, Brazil.

    Science.gov (United States)

    Menezes, V A; Vrcibradic, D; Vicente, J J; Dutra, G F; Rocha, C F D

    2004-12-01

    A sample of 101 specimens of the unisexual whiptail lizard Cnemidophorus nativo (Squamata; Teiidae) from a coastal site in Bahia State, Brazil were examined for the presence of endoparasites. Of these, 35 (34.7%) harboured helminths. Six helminth species were recovered from C. nativo, including five nematodes (Physaloptera retusa, Physalopteroides venancioi, Subulura lacertilia, Skrjabinelazia intermedia and Parapharyngodon sp., and one cestode (Oochoristica ameivae), all representing new host records. Most lizards were infected by a single species of helminth and none by more than three. Infection rates were neither significantly influenced by host body size nor by environmental factors. The results are compared with data from studies on other whiptail species in both South and North America.

  10. Could the bug Triatoma sherlocki be vectoring Chagas disease in small mining communities in Bahia, Brazil?

    Science.gov (United States)

    Almeida, C E; Folly-Ramos, E; Peterson, A T; Lima-Neiva, V; Gumiel, M; Duarte, R; Lima, M M; Locks, M; Beltrão, M; Costa, J

    2009-12-01

    Searches for Chagas disease vectors were performed at the type locality from which Triatoma sherlocki Papa et al. (Hemiptera: Reduviidae: Triatominae) was described in the municipality of Gentio do Ouro, in the state of Bahia, Brazil, and in a small artisan quarry-mining community approximately 13 km distant in a remote area of the same municipality. The latter site represents a new locality record for this species. Adults, nymphs and exuviae of T. sherlocki were found in 21% of human dwellings, indicating that the species is in the process of domiciliation. Prevalence of Trypanosoma cruzi infection in collected bugs was 10.8%. Simple predictive approaches based on environmental similarity were used to identify additional sites likely suitable for this species. The approach successfully predicted an additional five sites for the species in surrounding landscapes. Ecological and entomological indicators were combined to discuss whether this scenario likely represents an isolated case or an emerging public health problem.

  11. ADJUVANT PHARMACOTERAPEUTICAL PROFILE OF ONCOLOGICAL PATIENTS FROM A WELCOMING HOUSE INSIDE THE BAHIA

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    Phydel Palmeira Carvalho

    2017-05-01

    Full Text Available Cancer is one of the most important public health problems worldwide and is among the main causes of death. The purpose of this study is to outline the adjuvant pharmacotherapeutic profile in the palliative support of cancer patients in a nursing home in the city of Vitória da Conquista - Bahia. Twenty-seven individuals over 40 years of age were interviewed, the variables studied were socioeconomic, comorbidities and palliative medication prescriptions. The research was performed during the months of October to December 2014. The most frequent signs and symptoms were weakness (96%, pain (70%, constipation (67% and insomnia (67%. The main adjuvant treatments were treatment of cancer pain (30.7% and inhibition of emesis (28.4%. It is concluded that palliative pharmacotherapeutic support was used in the treatment of cancer patients, with prevalence of drugs for pain, nausea and emesis control, as well as prophylaxis of ulcerations.

  12. Astyanax vermilion and Astyanax burgerai: new characid fishes (Ostariophysi: Characiformes from Northeastern Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Angela M. Zanata

    Full Text Available Two new Astyanax species, A. vermilion, from rio Almada and rio Cachoeira, and A. burgerai, from rio Almada, Bahia State, Brazil, are described. Astyanax vermilion is distinguished from most of its congeners and from all other Astyanax species known from northeastern Brazilian drainages by having distal portion of pelvic fins dark, a combination of sexually dimorphic characters, posteroventral portion of body and fins (except pectoral reddish in life, and inconspicuous humeral and caudal spots. It also differs by having highest body depth just anterior of dorsal-fin origin, 32-34 lateral-line scales, and presence of one or two maxillary teeth. Astyanax burgerai is diagnosed by the presence of two vertically elongated humeral blotches, absence of a conspicuous and broad dark midlateral stripe (at least on anterior half of body, body highest along vertical slightly behind midlength of pectoral fin, 31-34 lateral-line scales, and two or three teeth on premaxillary outer series.

  13. EPIDEMIOLOGICAL PROFILE OF ASSAULTS IN FIREARMS AND WHITE GUN INSIDE OF BAHIA

    Directory of Open Access Journals (Sweden)

    Felipe Santos Abreu

    2016-03-01

    Full Text Available The present study aimed to trace the epidemiological profile of firearm assaults and melee weapon, no period of 2009 to 2011, in a General Hospital not interior of Bahia. The analysis was performed using descriptive statistics and data presented as absolute and relative frequencies. From the results, 299 hospitalizations were due to aggression by firearms or bladed weapon, with the highest percentage of victims, young men, aged 20-29 years (39.5%. It is necessary the elaboration and implementation of public policies involving the various segments of civil society and organized to deal with this public health issue with a view to adoption of strategies for the prevention and reduction of morbidity and mortality rates.

  14. Ethnoentomological studies in the state of Bahia: an homanage to the 50

    Directory of Open Access Journals (Sweden)

    Eraldo Medeiros Costa Neto

    2004-05-01

    Full Text Available This paper discusses the importance of research in ethnoentomology by examining the works which have been carried out in different social and cultural contexts within Bahia State, northeastern Brazil. Such works range from studies in ethnotaxonomy to the use of insects both as food and medicinal resources, as well as their use in the art of philately and advertising. Studies on ethnoentomology can stimulate new ideas to be researched by science, especially those stressing both the therapeutic and protein potential of the insects, thus representing a valuable contribution to the question of biodiversity and opening up possibilities for the economic valorization of species which are normally regarded as harmful or useless.

  15. Aplication of uranium isotopes as tracers in ground water studies (Bambui - Bahia, Brazil)

    International Nuclear Information System (INIS)

    Gomes, F.V.M.

    1978-03-01

    Analyses of 234 U/ 238 U activity ratios and the uranium concentration in 42 underground water samples have provided better in formation about the recharge area and the flow direction in the Bambui limestone, Bahia (Brazil). In the main recharge area, the activity ratios were found to range from 3 to 6 and the uranium concentration averaged 1 μg/l. The activity ratio increases northward with the highest values close to 10. The 234 U excess from a basic of ratio of activity (fundamental leaching ratio) also increases northward in agreement with the age of the water, an observation confirmed by C-14. This 234 U excess is attributed to the alpha-recoil process. The system was calibrated and the age of the waters in the calcareous region was determined. (Author) [pt

  16. Imperfections study of the smoky quartz from Bahia by X-ray diffraction

    International Nuclear Information System (INIS)

    D'Aguiar Neto, M.M.F.

    1974-01-01

    X-ray diffraction techniques were used to study the type of point defects in Smoky quartz from Itambe and Vitoria da Conquista in Bahia. The power method, using the Seemann Bohlin camara (back refletion), was utilized in the analysis of the policrystals, while the monocrystals were studied by means of the precession camara. The positions occupied by the defects in the crystal net were calculated. The results show that while the defects of substitutional impurities predominate in the quartz from Itambe, in the quartz from Vitoria da Conquista the substitutional defects exist in comparable proportions that the interstital ones. Isochronous annealing curves, for both type of smoky quartz indicate an increase in the net parameter to temperature values above the annealing temperatures. Was formulated the hypothesis that providing a thermal energy greater than that of annealing is used, new interstitial defects would be created as a result of a thermic diffusion mechanism. (C.D.G.) [pt

  17. Thermoluminescence study of quartzite in a gold and uranium mineralized zone (Canavieiras, Jacobina-Bahia)

    International Nuclear Information System (INIS)

    Ferreira, J.

    1973-01-01

    The quartzite of Canavieiras gold mine (Jacobina-Bahia, Brazil) shows in its natural glow curve, a high temperature. The study of the reproductibility of this peak resulted in the standartization of measurement for grain sizes between 80 and 100 mesh. ''In Situ'' total gamma-ray profiles were made using a scintillation detector for the study the distribution of radioactive elements near the pirite, uranium and gold strike. In the interpretation of the profiles it was possible to shown a positive correlation between thermoluminescence and uranium yields. The thermoluminescence peak is sufficiently high temperature peak to let thermoluminescence accumulate at ambient temperatures. It was used in attempt to estimate the time and the event that enitiated the accumulation of thermoluminescence. The result obtained, (7 - + 4).10 6 years, may correspond to the last heating of the rocks at relatively recent time. (C.D.G.) [pt

  18. Areas of natural occurrence of Melipona scutellaris Latreille, 1811 (Hymenoptera: Apidae in the state of Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Rogério M.O. Alves

    2012-09-01

    Full Text Available The bee Melipona scutellaris is considered the reared meliponine species with the largest distribution in the North and Northeast regions of Brazil, with records from the state of Rio Grande do Norte down to the state of Bahia. Considering the importance of this species in the generation of income for family agriculture and in the preservation of areas with natural vegetation, this study aimed at providing knowledge on the distribution of natural colonies of M. scutellaris in the state of Bahia. Literature information, interviews with stinglessbee beekeepers, and expeditions were conducted to confirm the natural occurrence of the species. A total of 102 municipalities showed records for M. scutellaris, whose occurrence was observed in areas ranging from sea level up to 1,200-meter height. The occurrence of this species in the state of Bahia is considered to be restricted to municipalities on the coastal area and the Chapada Diamantina with its rainforests. Geographic coordinates, elevation, climate and vegetation data were obtained, which allowed a map to be prepared for the area of occurrence in order to support conservation and management policies for the species.A abelha Melipona scutellaris é considerada a espécie criada de meliponíneo com maior distribuição no norte e nordeste do Brasil, com ocorrência registradas desde o Estado do Grande do Norte até o Estado da Bahia. Considerando a importância desta espécie na geração de renda para agricultura familiar e na manutenção de áreas com vegetação natural, este trabalho teve como objetivo conhecer a distribuição de colônias naturais de M. scutellaris no Estado da Bahia. Informações de literatura, entrevistas com meliponicultores e expedições foram realizadas para confirmar a ocorrência natural da espécie. Um total de 102 municípios apresentou registro de M. scutellaris, cuja ocorrência foi observada em áreas desde o nível do mar até 1.200 metros de altitude. A

  19. Suspended sediment fluxes in a tropical estuary, west coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    AnilKumar, N.; DineshKumar, P.K.; Srinivas, K.

    Annual transport processes of suspended sediments in Beypore estuary - a tropical estuary along the south west coast of India - were investigated based on time series measurements within the system. It's observed that the sediment transport...

  20. A study of the probable movement and mixing of contaminants in a tidal estuary

    Digital Repository Service at National Institute of Oceanography (India)

    DineshKumar, P.K.; Sarma, R.V.

    The probable movement and mixing of contaminants within and through the Amba river estuary, a tidal estuary along the westcoast of India are studied Neutrally buoyant bipelane drogues, floats and dye were tracked at different stages of the tide...

  1. Bacterial domination over Archaea in ammonia oxidation in a monsoon-driven tropical estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Vipindas, P.V.; Anas, A.; Jasmin, C.; Lallu, K.R.; Fausia, K.H.; Balachandran, K.K.; Muraleedharan, K.R.; Nair, S.

    Autotrophic ammonia oxidizing microorganisms,which are responsible for the rate-limiting step of nitrification in most aquatic systems, have not been studied in tropical estuaries. Cochin estuary (CE) is one of the largest, productive, and monsoon...

  2. Circulation and mixing process in Vasishta-Godavari estuary, east coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    Kumar, A.R.S.; Murty, T.V.R.; Rao, M.M.M.; Rao, V.R.; Reddy, B.S.R.

    Circulation and Mixing Process in Vasishta-Godavari Estuary, have been studied by using estuarine classification model. Analysis of salinity, salt budget, diffusion coefficients and flushing times based on salinity data of Vasishta-Godavari estuary...

  3. Picophytoplankton community in a tropical estuary: Detection of Prochlorococcus-like populations

    Digital Repository Service at National Institute of Oceanography (India)

    Mitbavkar, S.; Rajaneesh, K.M.; Anil, A.C.; Sundar, D.

    The influence of hydrography on the picophytoplankton (PP) abundance in estuaries was studied by sampling along a salinity gradient in an Indian estuary. Prochlorococcus-like cells were detected at salinities ranging from 0.06 to 35, which otherwise...

  4. Seasonal variations in abundance, biomass and grazing rates of microzooplankton in a tropical monsoonal estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Gauns, M.; Mochemadkar, S.; Patil, S.; Pratihary, A.K.; Naqvi, S.W.A.; Madhupratap, M.

    Seasonal abundance, composition and grazing rates of microzooplankton (20–200 µm) in the Zuari estuary were investigated to evaluate their importance in food web dynamics of a tropical monsoonal estuary. Average abundances of microzooplankton...

  5. Impact of maintenance dredging on macrobenthic community structure of a tropical estuary

    Digital Repository Service at National Institute of Oceanography (India)

    Rehitha, T.V.; Ullas, N.; Vineetha, G.; Benny, P.Y.; Madhu, N.V.; Revichandran, C.

    This paper demonstrates the impact of maintenance dredging activities on the macrobenthic community structure of a tropical monsoonal estuary (Cochin estuary), located in the southwest coast of India for three consecutive years. The results...

  6. A comparative study of Northern Ireland's estuaries based on the results of beam trawl fish surveys

    Science.gov (United States)

    Harrison, Trevor D.; Armour, Neil D.; McNeill, Michael T.; Moorehead, Peter W.

    2017-11-01

    The fish communities of Northern Ireland's estuaries were described and compared using data collected with a modified beam trawl over a six year period from 2009 to 2014. Multivariate analyses identified four estuary groups based on variations in their physico-chemical attributes. These groups broadly corresponded with the distribution and variation of estuary geomorphic types identified around the Irish coast. The dominant fish species captured were also among the main species reported in other North East Atlantic estuaries. A significant link between the estuary types and their fish communities was found; each estuary group contained a somewhat distinctive fish community. The fish communities also showed a significant relationship with the physico-chemical characteristics of the estuaries. Differences in fish species composition are attributed to habitat and environmental preferences of key estuary-associated species.

  7. Maturation of the penaeid prawn Metapenaeus moyebi in Mandovi Estuary, Goa

    Digital Repository Service at National Institute of Oceanography (India)

    Nair, S.R.S.; Achuthankutty, C.T; Parulekar, A

    Metapenaeus moyebi contributed a good share of penaeid prawn population in the Mandovi Estuary of Goa, India throughout the year. Both males and females of this species with fully mature gonads were observed in the estuary, suggesting further...

  8. West Coast Estuaries for Groundfish Essential Fish Habitat (EFH) Environmental Impact Statement

    Data.gov (United States)

    Pacific States Marine Fisheries Commission — These data depict the boundaries of estuaries along the West Coast of the United States. The estuary boundaries are delineated according to the U.S. Fish and...

  9. Food consumption pattern and obesity in preschool children in Feira de Santana, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Karina Emanuella Peixoto de Souza GOMES

    Full Text Available ABSTRACT Objective To evaluate the association between food consumption patterns and obesity in preschool children in Feira de Santana, Bahia, Brazil. Methods Cross-sectional, population-based nested within a live-birth cohort study of 813 children, which has started in 2004 in Feira de Santana, Bahia. The anthropometric status among children under four years of age was evaluated based on their body mass index; obesity/severe obesity was defined as a Z-score >+2. The Food Frequency Questionnaire was used to identify dietary patterns using principal components analysis. The association between obesity and food consumption patterns was assessed using Pearson’s Chi-squared test and logistic regression, adopting p<0.05 to denote statistical significance. Results Obesity was detected in 12.7% of the children investigated. Four food consumption patterns were identified: dietary pattern 1 (milk and other dairy products, vegetables and tubers, cereals, legumes, fruits, and fish; dietary pattern 2 (deep-fried or baked snacks, soft drinks/artificial fruit juices, oils and fats, sweets, and coffee/tea; dietary pattern 3 (encased meats, fast food, ketchup/mayonnaise, and eggs; and, dietary pattern 4 (chicken and red meats. Obesity was statistically associated with high adherence to the dietary pattern 3 (OR=1.92; 95%CI=1.01-3.66. Conclusion The results obtained showed that the high intake of energy-dense foods (dietary pattern 3 was a contributing factor to childhood obesity. These data reinforce the need for public policies and food education programs in health units and schools, aiming to change children’s eating habits, significant predictors of nutritional problems.

  10. β-globin haplotypes in normal and hemoglobinopathic individuals from Reconcavo Baiano, State of Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Wellington dos Santos Silva

    2010-01-01

    Full Text Available Five restriction site polymorphisms in the β-globin gene cluster (HincII-5'ε, HindIII-Gγ, HindIII-ªγ, HincII-'ψβ1 and HincII-3''ψβ1 were analyzed in three populations (n = 114 from Reconcavo Baiano, State of Bahia, Brazil. The groups included two urban populations from the towns of Cachoeira and Maragojipe and one rural Afro-descendant population, known as the "quilombo community", from Cachoeira municipality. The number of haplotypes found in the populations ranged from 10 to 13, which indicated higher diversity than in the parental populations. The haplotypes 2 (+----,3(----+,4(-+--+and6(-++-+onthe βA chromosomes were the most common, and two haplotypes, 9 (-++++and 14 (++--+, were found exclusively in the Maragojipe population. The other haplotypes (1, 5, 9, 11, 12, 13, 14 and 16 had lower frequencies. Restriction site analysis and the derived haplotypes indicated homogeneity among the populations. Thirty-two individuals with hemoglobinopathies (17 sickle cell disease, 12 HbSC disease and 3 HbCC disease were also analyzed. The haplotype frequencies of these patients differed significantly from those of the general population. In the sickle cell disease subgroup, the predominant haplotypes were BEN (Benin and CAR (Central African Republic, with frequencies of 52.9% and 32.4%, respectively. The high frequency of the BEN haplotype agreed with the historical origin of the afro-descendant population in the state of Bahia. However, this frequency differed from that of Salvador, the state capital, where the CAR and BEN haplotypes have similar frequencies, probably as a consequence of domestic slave trade and subsequent internal migrations to other regions of Brazil.

  11. Adult T-cell leukemia/lymphoma treatment in Bahia, Brazil

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    Pedro Dantas Oliveira

    Full Text Available Abstract Background: Adult T-cell leukemia/lymphoma is a peripheral disease associated with human T-cell lymphotropic virus type 1. Treatment is carried out according to clinical type with watchful waiting being recommended for less aggressive types. Aggressive adult T-cell leukemia/lymphoma is generally treated with chemotherapy and/or antivirals. The objective of this study was to correlate the survival of patients diagnosed in Bahia, Brazil, with the therapeutic approaches employed and to evaluate what issues existed in their treatment processes. Methods: Eighty-three adult T-cell leukemia/lymphoma patients (26 smoldering, 23 chronic, 16 acute, 13 lymphoma and five primary cutaneous tumoral with available data were included in this study. Results: Complete response was achieved in seven smoldering patients with symptomatic treatment, in two with chronic disease using antivirals/chemotherapy, in one with acute disease using antivirals and in one lymphoma using the LSG15 regimen [vincristine, cyclophosphamide, doxorubicin, and prednisolone (VCAP; doxorubicin, ranimustine, and prednisolone (AMP; and vindesine, etoposide, carboplatin, and prednisolone (VECP]. Smoldering patients who received symptomatic treatment presented longer survival. Favorable chronic patients treated with antivirals presented longer survival compared to the unfavorable subtype. However, for the acute form, first-line chemotherapy was better, albeit without significance, than antivirals. Only one of the patients with lymphoma and primary cutaneous tumors responded. Conclusions: Watchful waiting associated with phototherapy represents the best option for smoldering adult T-cell leukemia/lymphoma with survival in Bahia being superior to that described in Japan. There was a trend of better results with zidovudine/interferon-alpha in favorable chronic disease. Excellent results were achieved in the lymphoma type treated with the LSG15 protocol. Patients are diagnosed late

  12. The reconstruction of a glacial lake outburst flood using HEC-RAS and its significance for future hazard assessments: an example from Lake 513 in the Cordillera Blanca, Peru

    Czech Academy of Sciences Publication Activity Database

    Klimeš, Jan; Benešová, M.; Vilímek, V.; Bouška, P.; Rapre, A.C.

    2014-01-01

    Roč. 71, č. 3 (2014), s. 1617-1638 ISSN 0921-030X R&D Projects: GA ČR(CZ) GAP209/11/1000 Institutional support: RVO:67985891 Keywords : GLOFs * debris flow * natural hazard * HEC-RAS * Cordillera Blanca Subject RIV: DE - Earth Magnetism, Geodesy, Geography Impact factor: 1.719, year: 2014

  13. Comportamiento temporal de la radiación solar global en la ciudad de Bahía Blanca, Argentina

    Directory of Open Access Journals (Sweden)

    María Eugenia Fernández

    2015-08-01

    Full Text Available La energía que irradia el Sol es la principal causa de las diferencias climáticas en nuestro planeta y sustenta todos los procesos vitales. Si bien dicha emisión es prácticamente constante para escalas temporales breves, la radiación incidente en cada sitio es variable y depende en gran medida de los estados atmosféricos. En este sentido, la cantidad de cielo cubierto por nubes es un factor primordial, ya que por su capacidad de absorción y reflexión estas pueden reducir sustancialmente la radiación que alcanza la superficie terrestre. El objetivo del presente trabajo es caracterizar el comportamiento de la radiación solar global en la ciudad de Bahía Blanca (Argentina para el período 2001-2011 y comparar los valores radiativos registrados en los años 2007-2011 con datos referidos a coberturas nubosas a fin de establecer relaciones entre ambas variables. La radiación promedio para el intervalo analizado fue de 187,36 W/m 2 . En enero y en diciembre todos los días se registraron radiaciones mayores a 227,4 W/m 2 y en junio y julio la radiación siempre osciló entre 51,5 W/m 2 y 110,1 W/m 2 . En el transcurso del día la radiación alcanza su máximo valor entre las 13:00 h y 13:30 h. En lo que respecta a la relación entre la cobertura nubosa y la radiación global se observaron reducciones de hasta un 10,86 % entre cielos despejados (0 octas y parcialmente nublados (1-5 octas y de hasta 44,35 % entre cielos despejados y cubiertos (6-8 octas. En término medio, los días claros reciben alrededor de un 16 % más de radiación que todos los días en conjunto.

  14. Arte Público y Memoria Ferroviaria II Paseo de las Esculturas, Bahía Blanca, República Argentina.

    Directory of Open Access Journals (Sweden)

    Diana I. Ribas

    2017-07-01

    Full Text Available En los noventa, la degradación final del sistema ferroviario estatal impulsada por el Presidente Carlos Menem en el marco de una serie de normas neoliberales implicó, paradójicamente, que los restos materiales se convirtieran en una atracción para el arte público regional. En ese entonces, el Museo Municipal de Arte de Bahía Blanca impulsó un Simposio Nacional de Escultura Monumental invitando a diez artistas a utilizar la chatarra de hierro desde el paradigma moderno de arte autónomo. Las obras fueron instaladas en una parte del entubamiento del arroyo Napostá, que fue integrado a otras acciones de planeamiento urbano que valorizaron la zona norte de la ciudad. El nuevo parque lineal comenzó a ser llamado Paseo de las Esculturas. Dos variables reafirman la categoría de arte público en esta activación de la memoria ferroviaria. En primer lugar, el espacio en donde están emplazadas es público, en tanto es de propiedad estatal y, sobre todo, por ser de libre acceso. A su vez, los debates posteriores suscitados por el soporte artístico no tradicional, por la colocación de cercos en tres de las obras y por los costos de la puesta en valor del sector en 2016/17, implican una operación que ha superpuesto una dimensión ideológico-política (esfera pública a la territorial. Por otro lado, en las fuentes documentales la palabra “público” ha sido utilizada en referencia a representaciones sociales vinculadas con la exhibición y la recepción. El carácter duradero de los viejos hierros ferroviarios ha permitido que las formas instaladas en el parque lineal sean constructoras de distintos esquemas intelectuales que, según lo registrado, en su mayoría no han remitido a las historias que han atravesado al material ni a las acciones que desarticularon el sistema de transporte. En síntesis, si bien las esculturas del Paseo introdujeron la no figuración monumental en un sector de la trama urbana bahiense y cumplieron un rol pedag

  15. Trophic flow structure of a neotropical estuary in northeastern Brazil and the comparison of ecosystem model indicators of estuaries

    Science.gov (United States)

    Lira, Alex; Angelini, Ronaldo; Le Loc'h, François; Ménard, Frédéric; Lacerda, Carlos; Frédou, Thierry; Lucena Frédou, Flávia

    2018-06-01

    We developed an Ecopath model for the Estuary of Sirinhaém River (SIR), a small-sized system surrounded by mangroves, subject to high impact, mainly by the sugar cane and other farming industries in order to describe the food web structure and trophic interactions. In addition, we compared our findings with those of 20 available Ecopath estuarine models for tropical, subtropical and temperate regions, aiming to synthesize the knowledge on trophic dynamics and provide a comprehensive analysis of the structures and functioning of estuaries. Our model consisted of 25 compartments and its indicators were within the expected range for estuarine areas around the world. The average trophic transfer efficiency for the entire system was 11.8%, similar to the theoretical value of 10%. The Keystone Index and MTI (Mixed Trophic Impact) analysis indicated that the snook (Centropomus undecimalis and Centropomus parallelus) and jack (Caranx latus and Caranx hippos) are considered as key resources in the system, revealing their high impact in the food web. Both groups have a high ecological and commercial relevance, despite the unregulated fisheries. As result of the comparison of ecosystem model indicators in estuaries, differences in the ecosystem structure from the low latitude zones (tropical estuaries) to the high latitude zones (temperate system) were noticed. The structure of temperate and sub-tropical estuaries is based on high flows of detritus and export, while tropical systems have high biomass, respiration and consumption rates. Higher values of System Omnivory Index (SOI) and Overhead (SO) were observed in the tropical and subtropical estuaries, denoting a more complex food chain. Globally, none of the estuarine models were classified as fully mature ecosystems, although the tropical ecosystems were considered more mature than the subtropical and temperate ecosystems. This study is an important contribution to the trophic modeling of estuaries, which may also help

  16. Riverbed Micromorphology of the Yangtze River Estuary, China

    Directory of Open Access Journals (Sweden)

    Shuaihu Wu

    2016-05-01

    Full Text Available Dunes are present in nearly all fluvial channels and are vital in understanding sediment transport, deposition, and flow conditions during floods of rivers and estuaries. This information is pertinent for helping developing management practices to reduce risks in river transportation and engineering. Although a few recent studies have investigated the micromorphology of a portion of the Yangtze River estuary in China, our understanding of dune development in this large estuary is incomplete. It is also poorly understood how the development and characteristics of these dunes have been associated with human activities in the upper reach of the Yangtze River and two large-scale engineering projects in the estuarine zone. This study analyzed the feature in micromorphology of the entire Yangtze River estuary bed over the past three years and assessed the morphological response of the dunes to recent human activities. In 2012, 2014, and 2015, multi-beam bathymetric measurements were conducted on the channel surface of the Yangtze River estuary. The images were analyzed to characterize the subaqueous dunes and detect their changes over time. Bottom sediment samples were collected for grain size analysis to assess the physical properties of the dunes. We found that dunes in the Yangtze River estuary can be classified in four major classes: very large dunes, large dunes, medium dunes, and small dunes. Large dunes were predominant, amounting to 51.5%. There was a large area of dunes developed in the middle and upper reaches of the Yangtze River estuary and in the Hengsha Passage. A small area of dunes was observed for the first time in the turbidity maximum zone of the Yangtze River estuary. These dunes varied from 0.12 to 3.12 m in height with a wide range of wavelength from 2.83 to 127.89 m, yielding a range in height to wavelength of 0.003–0.136. Sharp leeside slope angles suggest that the steep slopes of asymmetrical dunes in the middle and upper

  17. Dynamics of intertidal flats in the Loire estuary

    Science.gov (United States)

    Kervella, Stephane; Sottolichio, Aldo; Bertier, Christine

    2014-05-01

    Tidal flats form at the edges of many tidal estuaries, and are found in broad climatic regions. Their evolution plays a fundamental role in maintaining the morphodynamic equilibrium of an estuary. The Loire estuary is one of the largest macrotidal systems of the french atlantic coast. Since 200 years, its geometry has been drastically modified through channeling, deepening, embanking, infilling of secondary channels, etc. These works altered many intertidal areas. In the recent years, efforts for the rectification of the morphology have been made in order to restore the ecology of the estuary. In this context, it is crucial to better understand the dynamics of intertidal flats, still poorly understood in this estuary. The aim of this work is to analyse a series of original observations conducted for the first time in two intertidal flats of the central Lore estuary between 2008 and 2010. The tidal flats are situated in the northern bank, at 12 and 17 km upstream from the mouth respectively. Six Altus altimeters were deployed at two cross shore transects, measuring continuously and at a high-frequency bed altimetry and water level, providing information on tide and waves. At the semi-diurnal tidal scale, the surficial sediment of intertidal flats is permanently mobilized. Altimetry variations are low, and their amplitude varies as a function of tides and river flow. At the scale of several months, the sedimentation is controlled by the position of the turbidity maximum (and therefore by the river flow) and also by the tidal amplitude. During low river flow periods, altimetry variations are only due to tidal cycles. During decaying tides, suspended sediment settle mainly on the lower part of the tidal flats, forming fluid mud layers of several cm thick, which can consolidate rapidly; under rising tides, the increasing of tidal currents promotes erosion. During periods of high river flow, the turbidity maximum shifts to the lower estuary. The higher suspended sediment

  18. Silicon dynamics in the Oder estuary, Baltic Sea

    Science.gov (United States)

    Pastuszak, Marianna; Conley, Daniel J.; Humborg, Christoph; Witek, Zbigniew; Sitek, Stanisław

    2008-10-01

    Studies on dissolved silicate (DSi) and biogenic silica (BSi) dynamics were carried out in the Oder estuary, Baltic Sea in 2000-2005. The Oder estuary proved to be an important component of the Oder River-Baltic Sea continuum where very intensive seasonal DSi uptake during spring and autumn, but also BSi regeneration during summer take place. Owing to the regeneration process annual DSi patterns in the river and the estuary distinctly differed; the annual patterns of DSi in the estuary showed two maxima and two minima in contrast to one maximum- and one minimum-pattern in the Oder River. DSi concentrations in the river and in the estuary were highest in winter (200-250 μmol dm - 3 ) and lowest (often less than 1 μmol dm - 3 ) in spring, concomitant with diatom growth; such low values are known to be limiting for new diatom growth. Secondary DSi summer peaks at the estuary exit exceeded 100 μmol dm - 3 , and these maxima were followed by autumn minima coinciding with the autumn diatom bloom. Seasonal peaks in BSi concentrations (ca. 100 μmol dm - 3 ) occurred during the spring diatom bloom in the Oder River. Mass balance calculations of DSi and BSi showed that DSi + BSi import to the estuary over a two year period was 103.2 kt and that can be compared with the DSi export of 98.5 kt. The difference between these numbers gives room for ca. 2.5 kt BSi to be annually exported to the Baltic Sea. Sediment cores studies point to BSi annual accumulation on the level of 2.5 kt BSi. BSi import to the estuary is on the level of ca. 10.5 kt, thus ca. 5 kt of BSi is annually converted into the DSi, increasing the pool of DSi that leaves the system. BSi concentrations being ca. 2 times higher at the estuary entrance than at its exit remain in a good agreement with the DSi and BSi budgeting presented in the paper.

  19. Functional diversity of fish in estuaries at a global extent

    Directory of Open Access Journals (Sweden)

    Rita P Vasconcelos

    2015-10-01

    Full Text Available Biodiversity is currently viewed as a framework encompassing multiple facets of the variety of life, including taxonomic and functional aspects. Species richness and composition of fish assemblages in estuaries is defined by global to local processes acting on community colonization. The present study further investigates how biodiversity of fish assemblages varies among estuaries globally, by simultaneously analysing taxonomic and functional richness and diversity of assemblages. A comprehensive worldwide database was compiled on the fish assemblage composition and environmental characteristics of estuaries. In addition, functional attributes of the fish species were characterized such as body size, habitat use and trophic ecology. We investigated the relationship between taxonomic and functional aspects of biodiversity, i.e. the match or mismatch between the two. We also explored how functional diversity of fish assemblages varied among estuaries globally and related to environmental features of estuaries, i.e. historic and contemporary, global and local constraints. The results are explored in the context of ecosystem functioning and resilience, and outcomes relevant to assist in prioritizing conservation efforts are highlighted.

  20. Geophysical exploration with transient electromagnetic soundings in three geothermal zones of Baja California, Mexico: Tres Virgenes, Puertecitos and Bahia Concepcion; Exploracion geofisica con sondeos electromagneticos transitorios en tres zonas geotermicas de Baja California, Mexico: Tres Virgenes, Puertecitos y Bahia Concepcion

    Energy Technology Data Exchange (ETDEWEB)

    Flores, Carlos; Vazquez, Rogelio; Gonzalez, Carlos A; Romo, Jose M; Velasco, Nector; Lopez, Addier [CICESE, Ensenada, B.C. (Mexico)

    1999-04-01

    The results obtained from transient electromagnetic soundings (TDEM) applied to three geothermal zones are briefly commented, emphasizing instead the out of contract work done by the Centro de Investigacion Cientifica y de Educacion Superior de Ensenada (CICESE), both in the application of other geophysical techniques and the subsequent data analysis. This work includes several VLF (very low frequency) electromagnetic profiles in Bahia Concepcion and a magnetotelluric profile in Puertecitos. Regarding the data analysis, an algorithm to assess stratified models was constructed and applied to several Bahia Concepcion soundings and to the TDEM and Schlumberger data from Tres Virgenes in order to compare the resolving powers of these methods. Finally an imaging procedure based on smoothness constraints is being applied nowadays to characterize the geometry of the electric conductors under the Tres Virgenes hot springs. [Spanish] Se comentan los resultados de la aplicacion del modo de sondeo electromagnetico transitorio (TDEM) en tres zonas geotermicas, dando enfasis al trabajo realizado fuera de contrato por el Centro de Investigacion Cientifica y de Educacion Superior de Ensenada (CICESE), tanto en la aplicacion de otras tecnicas geofisicas como en el analisis posterior de los datos. Estos trabajos comprenden el levantamiento de perfiles electromagneticos con el metodo VLF (very low frequency) en Bahia Concepcion y de un perfil magnetotelurico en Puertecitos. En relacion con analisis de los datos, se implemento un algoritmo de evaluacion de modelos estratificados, usandose en sondeos de Bahia Concepcion. Esta tecnica se aplico a los datos TDEM y Schlumberger de Tres Virgenes para comparar sus poderes de resolucion. Finalmente, un procedimiento de construccion de imagenes de resistividad, basado en condiciones de suavidad, se esta aplicando actualmente a los datos de Tres Virgenes para caracterizar la geometria de los conductores electricos bajo las manifestaciones

  1. 76 FR 23306 - Takes of Marine Mammals Incidental to Specified Activities; Russian River Estuary Management...

    Science.gov (United States)

    2011-04-26

    ... Marine Mammals Incidental to Specified Activities; Russian River Estuary Management Activities AGENCY...) to incidentally harass, by Level B harassment only, three species of marine mammals during estuary... December 31, 2010; and Russian River Estuary Outlet Channel Adaptive Management Plan. NMFS' Environmental...

  2. 77 FR 24471 - Takes of Marine Mammals Incidental to Specified Activities; Russian River Estuary Management...

    Science.gov (United States)

    2012-04-24

    ... Marine Mammals Incidental to Specified Activities; Russian River Estuary Management Activities AGENCY...) to incidentally harass, by Level B harassment only, three species of marine mammals during estuary... Estuary Outlet Channel Adaptive Management Plan; and Feasibility of Alternatives to the Goat Rock State...

  3. 33 CFR 165.1190 - Security Zone; San Francisco Bay, Oakland Estuary, Alameda, CA.

    Science.gov (United States)

    2010-07-01

    ..., Oakland Estuary, Alameda, CA. 165.1190 Section 165.1190 Navigation and Navigable Waters COAST GUARD... § 165.1190 Security Zone; San Francisco Bay, Oakland Estuary, Alameda, CA. (a) Location. The following area is a security zone: All navigable waters of the Oakland Estuary, California, from the surface to...

  4. 78 FR 68995 - Safety Zone: Vessel Removal From the Oakland Estuary, Alameda, CA

    Science.gov (United States)

    2013-11-18

    ...-AA00 Safety Zone: Vessel Removal From the Oakland Estuary, Alameda, CA AGENCY: Coast Guard, DHS. ACTION... waters of the Oakland Estuary just north of the Park Street Bridge in Alameda, CA in support of the Oakland Estuary Closure for the Vessel Removal Project on November 4, 2013 through November 22, 2013. This...

  5. 78 FR 46332 - Proposed Information Collection Request; Comment Request; National Estuary Program

    Science.gov (United States)

    2013-07-31

    ... Request; Comment Request; National Estuary Program AGENCY: Environmental Protection Agency (EPA). ACTION... request (ICR), ``National Estuary Program'' (EPA ICR No. 1500.08, OMB Control No. 2040-0138 to the Office... comments to OMB. Abstract: The National Estuary Program (NEP) involves collecting information from the...

  6. Eco-morphological problems in the Yangtze Estuary and the Western Scheldt

    NARCIS (Netherlands)

    De Vriend, H.J.; Wang, Z.B.; Ysebaert, T.; Herman, P.M.J.; Ding, P.X.

    2011-01-01

    This paper compares the Yangtze Estuary in China and the Western Scheldt Estuary in The Netherlands by their morphodynamic and ecological systems, their engineering works and estuarine management issues, and the major challenges in studying them. Physically speaking, the two estuaries are very

  7. Variability in stratification and flushing times of the Gautami-Godavari estuary, India

    Digital Repository Service at National Institute of Oceanography (India)

    Sridevi, B.; Sarma, V.V.S.S.; Murty, T.V.R.; Sadhuram, Y.; Reddy, N.P.C.; Vijaykumar, K.; Raju, N.S.N.; JawaharKumar, CH.; Raju, Y.S.N.; Luis, R.; Kumar, M.D.; Prasad, K.V.S.R.

    –Godavari estuary (G–GE) during spring and neap tide periods covering entire spectrum of discharge over a distance of 36 km from the mouth. The bathymetry of the estuary was recently changed due to dredging of ~20 km of the estuary from the mouth for transportation...

  8. 75 FR 2517 - Notice of Solicitation for Estuary Habitat Restoration Program

    Science.gov (United States)

    2010-01-15

    ..., wastewater treatment plant upgrades, combined sewer outfalls, and non-point source pollution projects such as... Estuary Restoration Act of 2000, Title I of the Estuaries and Clean Waters Act of 2000 (Pub. L. 106-457... with fresh water from land drainage.'' Estuary also includes the ``* * * near coastal waters and...

  9. [The legitimacy of representation in forums with social participation: the case of the Bahia State Health Council, Brazil].

    Science.gov (United States)

    Bispo Júnior, José Patrício; Gerschman, Sílvia

    2015-01-01

    The electoral representation model is insufficient and inadequate for new participatory roles such as those played by members of health councils. This article analyzes representation and representativeness in the Bahia State Health Council, Brazil. The study included interviews with 20 current or former members of the State Health Council, analysis of the council minutes and bylaws, and observation of plenary meetings. Discourse analysis technique was used to analyze interventions by members. The article discusses the results in four analytical lines: the process by which various organizations name representatives to the Council; the relationship between Council members and their constituencies; interest representation in the Council; and criteria used by the plenary to take positions. The study reveals various problems with the representativeness of the Bahia State Health Council and discusses the peculiarities of representation in social participation forums and the characteristics that give legitimacy to representatives.

  10. Utilization of geophysical nuclear methods on apatite mines from Gaviao and gold from Jacobina mountain - Bahia, Brazil

    International Nuclear Information System (INIS)

    Barreto, P.T.

    1974-01-01

    This thesis is part of the sub-project Analysis of Rocks and Minerals by Gamma-Spectrometry of the Program of Research and Postgraduation in Geophysics of the Federal University of Bahia. It presents: 1) the results of preliminary radio-geological surveying in Cenozoic, Mesozoic and Pre-Cambrian lands between the cities of Salvador and Miguel Calmon; detailed radiogeological works in two radioactive anomalous areas: Gaviao at Riachao de Jacuipe town, and Canavieiras mine and vicinities at Jacobina town, state of Bahia. The combined results of field gamma-ray survey, gamma-spectrometry accomplished at laboratory from samples, petrographical and mineralogical studies led to the correlation between apatita mineralization with thorium, and Gold with uranium in the Comglomerates of Serra do Corrego formation giving the possibilities in both cases of making the prospection and exploration by the cintilometry. (author)

  11. Perkinsus beihaiensis infecting the oyster Crassostrea rhizophorae under cultivation and in natural stock in Camamu Bay, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Mariane dos Santos Aguiar Luz

    2016-07-01

    Full Text Available This study investigated the infection of Perkinsus beihaiensis (Perkinsozoa in the oyster Crassostrea rhizophorae, both from a long-line cultivation system and from a nearby intertidal zone of mangrove, both in the state of Bahia, northeastern Brazil. The collections were performed in October and November 2012, and in January 2013. The oysters (n = 300 were measured, examined macroscopically for signs of infection and then submitted to the following laboratory techniques: histology, Ray's fluid thioglycollate medium assay (RFTM, polymerase chain reaction (PCR and sequencing, which confirmed the identification of the pathogen. Histological and RFTM analyses showed, respectively, a mean prevalence of 93.3% and of 69%. The infection was usually mild or very mild. There was no significant difference (p > 0.05 between the environments in terms of infection prevalence or severity. This is the first record of P. beihaiensis in the state of Bahia and the second in oysters from Brazil and South America.

  12. Detection of Rickettsia bellii and Rickettsia amblyommii in Amblyomma longirostre (Acari: Ixodidae) from Bahia state, Northeast Brazil.

    Science.gov (United States)

    McIntosh, Douglas; Bezerra, Rodrigo Alves; Luz, Hermes Ribeiro; Faccini, João Luiz Horacio; Gaiotto, Fernanda Amato; Giné, Gastón Andrés Fernandez; Albuquerque, George Rego

    2015-01-01

    Studies investigating rickettsial infections in ticks parasitizing wild animals in the Northeast region of Brazil have been confined to the detection of Rickettsia amblyommii in immature stages of Amblyomma longirostre collected from birds in the state of Bahia, and in immatures and females of Amblyomma auricularium collected from the striped hog-nosed skunk (Conepatus semistriatus) and armadillos (Euphractus sexcinctus) in the state of Pernambuco. The current study extends the distribution of R. amblyommii (strain Aranha), which was detected in A. longirostre collected from the thin-spined porcupine Chaetomys subspinosus and the hairy dwarf porcupine Coendou insidiosus. In addition, we report the first detection of Rickettsia bellii in adults of A. longirostre collected from C. insidiosus in the state of Bahia.

  13. Epidemia de dengue em Ipupiara e Prado, Bahia. Inquérito soro-epidemiológico Outbreak of dengue in Ipupiara and Prado, Bahia State. Seroepidemiologic survey

    Directory of Open Access Journals (Sweden)

    Pedro Fernando da Costa Vasconcelos

    2000-02-01

    Full Text Available No Brasil, os inquéritos sorológicos têm assinalado taxa de infecção pelo vírus do dengue de 25% a 56%, porém esses estudos foram realizados em populações de cidades de médio ou grande porte. No presente estudo, são descritas duas epidemias de febre clássica de dengue (DEN no Estado da Bahia. A primeira, ocorrida em 1987 e causada pelo sorotipo DEN-1 em Ipupiara e, a segunda, causada pelo DEN-2, em Prado e que ocorreu em 1995. O diagnóstico laboratorial foi realizado utilizando o teste de inibição da hemaglutinação (IH. Em 1995, foram coletadas 461 amostras sorológicas de uma população de 3.868 habitantes em Ipupiara (região da Chapada Diamantina e 228 de um total de 9.126 habitantes em Prado (Litoral Extremo Sul. A soro-positividade das amostras foi de 11,9% (55/461 em Ipupiara e 17,5% (40/228 em Prado. Não houve diferença, estatisticamente significante, quanto a idade e o gênero entre os indivíduos soro-positivos e negativos das duas cidades estudadas. Entretanto, em Ipupiara os soro-positivos (15,9% vs. 9,3% relataram, mais freqüentemente (p Serologic studies in Brazil have indicated a 25% to 56% prevalence of dengue virus infections. However, these studies were carried out in populations of middle-sized and larger cities. The present study describes two epidemics of classic dengue fever in two small cities in the State of Bahia. The first occurred in 1987, in Ipupiara and was caused by dengue serotype-1 (DEN-1, the second occurred in 1995, in Prado and was caused by dengue serotype-2 (DEN-2. The laboratory diagnosis was made by the hemagglutination-inhibitation test. 461 serum samples were collected in 1995 in Ipupiara (district of Chapada Diamantina out of a population of 3,868 and 228 samples out of a total of 9,126 inhabitants of Prado (in the Southernmost coastal region. The seropositivity of the samples was 11.9% (55/461 in Ipupiara and 17.5% (40/228 in Prado. These were no statistically significant differences

  14. Diversidade arbórea das florestas alto montanas no Sul da Chapada Diamantina, Bahia, Brasil Tree diversity of high montane forests in Southern Chapada Diamantina, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Francisco Haroldo Feitosa do Nascimento

    2010-09-01

    Full Text Available A região do extremo Sul da Chapada Diamantina abriga as maiores altitudes do Nordeste brasileiro. Situam-se nessas serras as maiores elevações da região Nordeste, entre elas, o Pico do Barbado (2.033 m.s.n.m.. Dois dos rios mais importantes da Bahia nascem nestas serras: o Rio de Contas e o Rio Paramirim. A região é bem conhecida botanicamente, porém, este foi o primeiro inventário quantitativo realizado enfocando as formações florestais. Comparou-se a composição florística de 12 fragmentos de floresta montana, entre 1.350 e 1.750 m.s.n.m., tendo sido amostrados os indivíduos com PAP> 8 cm. Registrou-se a presença de 116 espécies em 84 gêneros de 48 famílias. As famílias com maior número de espécies foram Myrtaceae (N=20 e Lauraceae (N=10. Os gêneros com maior número de espécies foram Ocotea (N=7, Myrcia (N=5, Eugenia (N=4 e Miconia (N=4. A maioria das espécies apresentou padrão de distribuição amplo, mas foram encontradas espécies comuns a formações florestais de altitude do Sudeste e Sul do Brasil, como Drimys brasiliensis Miers (Winteraceae e Weinmannia paulliniifolia Pohl (Cunnoniacae. A flora dos fragmentos estudados compartilha baixo número de espécies com as formações estacionais deciduais do entorno da Chapada Diamantina, indicando que estas florestas são únicas e merecem atenção especial, para sua conservação.The southernmost region of Chapada Diamantina, nearest to Rio de Contas harbours the highest peaks of the Brazilian northeastern region, including Pico do Barbado (2,033 m.a.s.l. and the source of the two important rivers in Bahia state (Rio de Contas and Rio Paramirim. The region is well known botanically. This was the first quantitative study to survey the floristic composition of 12 fragments of montane forests (1,350 m.a.s.l. to 1750 m.a.s.l. including trees > 8 cbh. A total of 117 species, 84 genera and 48 families were found. The richest families were Myrtaceae (N=20 and Lauraceae (N

  15. Perfil antropométrico e consumo alimentar de adolescentes de Teixeira de Freitas - Bahia Anthropometric profile and food intake of adolescents in Teixeira de Freitas - Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Jailda Silva Santos

    2005-10-01

    Full Text Available OBJETIVO: Descrever o perfil antropométrico e o consumo alimentar de adolescentes das escolas públicas de um município do Estado da Bahia. MÉTODOS: Estudo de corte transversal realizado com amostra aleatória por conglomerado de 354 alunos, dos 1.678 adolescentes de dezessete a dezenove anos matriculados nas 23 escolas elegíveis do município. Foram coletados dados sobre freqüência de consumo alimentar qualitativo e indicadores antropométricos, como o índice de massa corporal; pregas cutâneas triciptal e subescapular e o indicador altura/idade, segundo a Organização Mundial da Saúde. Realizou-se análise bivariada e estratificada, sendo a significância estatística verificada pelo qui-quadrado e teste exato de Fischer, com nível crítico de 5%. RESULTADOS: A análise antropométrica evidenciou maior prevalência de sobrepeso e obesidade (5,1% no sexo feminino e de magreza no masculino (6,4%; o déficit de crescimento foi observado em 25,0% dos adolescentes, sendo 15,0% de leve a moderado e 10,0% grave. Evidenciou-se também consumo habitual de arroz, feijão, farinha de mandioca, pão francês, manteiga, margarina, açúcar e café, sendo baixo o consumo de produtos lácteos, frutas, legumes e hortaliças; 96,6% dos adolescentes realizavam mais de três refeições diárias e mais de 80,0% alimentavam-se no domicílio. CONCLUSÃO: Os resultados apontam a necessidade de implementação de estratégias de prevenção dos problemas nutricionais por meio de uma alimentação e um estilo de vida saudáveis, assim como de estudos sobre os possíveis fatores comprometedores do crescimento dos adolescentes.OBJECTIVE: The objective was to describe the anthropometric profile and food intake in adolescents from public schools in a municipality of Bahia, Brazil. METHODS: A cross-sectional experimental design was employed with a random conglomerate sample of 354 adolescents, 17 to 19 years old, from a total of 1.678 students enrolled in 23

  16. Surto de leishmaniose tegumentar americana em Canoa, Santo Amaro, Bahia, Brasil An outbreak of American cutaneous leishmaniasis in Canoa, Santo Amaro, Bahia, Brazil

    Directory of Open Access Journals (Sweden)

    Ivonise Follador

    1999-10-01

    Full Text Available Em 1993, um surto leishmaniose tegumentar americana (LTA foi detectado no povoado rural de Canoa, município de Santo Amaro, Bahia. Um estudo observacional prospectivo delineou-se, com objetivo de determinar as taxas de freqüência e caracterizar clinicamente a doença. Foram acompanhados 555 indivíduos, registrando-se 29 casos de LTA, 11 casos sugestivos de LTA pregressa e 529 sadios. Desses 529 sadios, 65 apresentaram reação de Montenegro positiva sem qualquer evidência presente ou passada de doença. A prevalência de LTA no período de estudo foi de 5,2% (29/555. A leishmania envolvida foi caracterizada como Leishmania braziliensis e o vetor, Lutzomyia intermedia. Foram detectados cães e equídeos infectados por leishmania O acometimento de crianças menores de 10 anos, o acometimento igual entre os sexos e um componente de agregação familiar sugerem um padrão de transmissão peri ou intradomiciliar.An outbreak of American cutaneous leishmaniasis (ACL was detected in the village of Canoa in 1993. A prospective observational study was outlined to determine the frequency rates and to clinically characterize the disease. A total of 555 people were followed up. There were 29 cases of ACL, 11 cases of probably previous ACL (scars and 529 healthy individuals. Of these 529 individuals, 65 had a positive Montenegro reaction without any present or past evidence of leishmaniasis. The prevalence of ACL during the two years was 5.2% (29/555. The leishmania involved was Leishmania braziliensis and the vector, Lutzomyia intermedia. Evidence of infection was detected in dogs and horses. The high frequency of the disease among children under ten years, the similar sex distribution of cases and a component of familial aggregation suggest a peri- or intra-domiciliary transmission.

  17. Uma nota sobre ilusionismos e alegorias na pintura barroca de Salvador da Bahia A Note on Illusionism and Allegory in the Baroque Painting of Salvador, Bahia

    Directory of Open Access Journals (Sweden)

    Luís de Moura Sobral

    2008-12-01

    Full Text Available As principais tendências da pintura no Brasil colonial podem ser estudadas na Catedral de Salvador, a igreja do antigo Colégio da Companhia de Jesus. Datando dos finais do século XVII, várias séries de quadros de qualidade diversa, compõem com as esculturas dos altares um soberbo e complexo bel composto de propaganda inaciana. Para decorar o forro da Biblioteca, por cima da sacristia, os Jesuítas encomendaram cerca de 1735-1736 uma monumental quadratura ao pintor português António Simões Ribeiro (?-1755. A pintura é estudada em função da tradição de decoração das bibliotecas durante a época moderna. Para além da quadratura, Simões Ribeiro introduziu na arte brasileira as figuras alegóricas, tornando-se assim o primeiro pintor brasileiro verdadeiramente barroco e o criador da chamada Escola Bahiana.The main trends of the painting in colonial Brazil can be studied in the Cathedral of Salvador, Bahia, the church of the former Jesuit College. Dating from the late 17th Century, several cycles of paintings on the walls and the ceiling of the sacristy, of varying quality, accomplish particular symbolic functions; in conjunction with the sculpture of the altars, they compose a complex bel composto of Jesuit propaganda. To decorate the ceiling of their Library, above the sacristy, the Jesuits commissioned around 1735-1736 a huge quadratura from the Portuguese born painter António Simões Ribeiro (?-1755. This painting is discussed within the tradition of Library decoration in the Modern period. Besides the quadratura, Simões Ribeiro introduced in the Brazilian art the allegorical figures and became the first full-Baroque painter in Brazil and the initiator of the so-called Bahian School.

  18. 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)

  19. Delaware Estuary situation reports. Emergency response: How do emergency management officials address disasters in the Delaware Estuary

    International Nuclear Information System (INIS)

    Sylves, R.T.

    1991-01-01

    From hurricanes and other natural threats to oil spills and other manmade emergencies, the Delaware Estuary has experienced a variety of disasters over the years. The toll that these events take on the estuary and those who live on its shores depends largely upon the degree of emergency preparedness, speed of response, and effectiveness of recovery operations. In Emergency Response: How Do Emergency Management Officials Address Disasters in the Delaware Estuary, the latest addition to its Delaware Estuary Situation Report series, the University of Delaware Sea Grant College Program defines emergency management; examines the roles that the Coast Guard, Army Corps of Engineers, and Environmental Protection Agency play in an emergency; and reviews how each of these federal agencies operated during an actual disaster--the 1985 Grand Eagle oil spill. The report was written by Dr. Richard T. Sylves, a professor of political science at the University of Delaware. Sylves has been studying emergency management for the past 15 years, with special emphasis on oil spill preparedness and response in the Mid-Atlantic Region. The Delaware Estuary Situation Report is 12 pages long and contains maps and photographs, as well as a detailed account of response and recovery operations undertaken during the Grand Eagle oil spill. A comparison of the 1985 Grand Eagle spill and the 1989 Presidente Rivera spill also is included

  20. Effects of heavy metal contamination on the macrobenthic fauna in estuaries: The case of the Seine estuary

    International Nuclear Information System (INIS)

    Dauvin, Jean-Claude

    2008-01-01

    Heavy metal contamination levels are generally higher in estuaries than in the open sea. Some estuaries, the Seine estuary for example, have particularly high pollution levels of metals, yet continue to support a very high benthic biomass and remain quite productive. Measurements of sediment contamination are highly variable due to diverse chemical analysis methods, sediments origin and sources of contaminants found in the estuaries. Salinity appears to be the principal factor controlling contaminant distribution in the sediment and the overlying and/or interstitial waters; it also affects the bioavailability of contaminants in estuarine sediments. Of course, the response to contaminants varies greatly among species and assemblages. Trace metals explain only a small part of the variation in benthic community structure. Some species, such as the shrimp Crangon crangon, appears vulnerable to metal pollution, while other species, such as Scrobicularia plana, are able to tolerate quite high levels of cadmium in their tissue. This paper demonstrates the wide variability of benthic responses to contamination, which is probably due to the high spatio-temporal heterogeneity of the estuary. To reduce the problems due the heterogeneity and variability observed to date in the available results, it will be necessary to encourage integrated estuarine studies, in which sedimentologists, chemists, and biologists work together on the same campaigns at the same sites