Sample records for chaetomys subspinosus olfers

  1. Observações da dieta de Artibeus lituratus (Olfers) (Chiroptera, Phyllostomidae) em duas áreas do sul do Brasil Diet observations of Artibeus lituratus (Olfers) (Chiroptera, Phyllostomidae) in two areas of southern Brazil


    Fernando C. Passos; Gustavo Graciolli


    Este estudo foi realizado no Parque Nacional de Superagüi (PNS) e na Reserva Particular do Patrimônio Natural de Volta Velha (RPPN), ambas áreas de Mata Atlântica, nos Estados do Paraná e Santa Catarina, no sul do Brasil. Morcegos foram capturados em redes de neblina e amostras fecais foram coletadas para análise da dieta. As sementes encontradas em cada amostra foram identificadas em laboratório por meio de lupa. Cento e trinta e sete exemplares de Artibeus lituratus (Olfers, 1818) foram cap...

  2. Estudo preliminar sobre a ecologia de Lontra longicaudis (Olfers (Carnivora, Mustelidae no Vale do Taquari, Sul do Brasil Preliminary study by the ecology of Lontra longicaudis (Olfers (Carnivora, Mustelidae in Taquari Valley, South Brazil

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    Carlos Benhur Kasper


    Full Text Available O estudo foi realizado em duas áreas no Vale do Taquari, região central do Estado do Rio Grande do Sul, Sul do Brasil. Entre agosto de 2000 e dezembro de 2001 foi realizado um estudo sobre a dieta e o uso de abrigos e marcas odoríferas por Lontra longicaudis (Olfers, 1818. Coletaram-se 275 marcas odoríferas, das quais 261 foram analisadas para determinação da dieta. O uso de marcas odoríferas ocorreu por deposição de fezes, sobretudo sobre locais conspícuos das margens dos rios ou no interior dos abrigos. Os abrigos foram formados principalmente por escavação paralela a margem dos rios. Estes abrigos foram altamente reutilizados. Ocorreu predação sobre três grupos de presas: peixes, mamíferos e insetos. Os peixes formam a base da dieta, e as famílias Loricariidae/Callichthyidae, Cichlidae, Pimelodidae/Auchenipteridae e Erythrinidae foram as mais freqüentes nas análises fecais. A ocorrência destes grupos de peixes na dieta é maior do que sua disponibilidade relativa no ambiente.The study was carried out in two areas of Taquari Valley, central region of Rio Grande do Sul State, Southern Brazil. Between August 2000 and December 2001 a study about diet and use of shelters and scent marks by Lontra longicaudis (Olfers, 1818 was performed. 275 spraints were colleted, of which 261 were analised for diet determination. The use of scent marks occured by the deposition of feaces mainly under conspicuous sites of the river margin or inside the shelters. The shelters were often formed by parallel excavation of river margin. The shelters were highly reused. Predation occurred on 3 groups of preys: Fish, Mammals and Insects. The fish, formed the diet base, and the families Loricariidae/Callichthyidae, Cichlidae, Pimelodidae/ Auchenipteridae and Erythrinidae were the most frequently identified ones in fecal analysis. The occurrence of these fish groups in the diet was higher then the relative availability in environment.

  3. Detection of Rickettsia bellii and Rickettsia amblyommii in Amblyomma longirostre (Acari: Ixodidae) from Bahia state, Northeast Brazil. (United States)

    McIntosh, Douglas; Bezerra, Rodrigo Alves; Luz, Hermes Ribeiro; Faccini, João Luiz Horacio; Gaiotto, Fernanda Amato; Giné, Gastón Andrés Fernandez; Albuquerque, George Rego


    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.

  4. Karyological geographic variation of Oligoryzomys nigripes Olfers, 1818 (Rodentia, Cricetidae from Brazil

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    Roberta Paresque


    Full Text Available The karyotypes of 85 specimens of Oligoryzomys nigripes (Rodentia, Sigmodontinae collected in the Cerrado and Atlantic Forest of seven states of Brazil were analyzed. Eighty four specimens presented a karyotype with 2n = 62 and one individual had 2n = 61 due to a monosomy of the X chromosome. High levels of intra- and inter-population karyotypic variability, due to sex chromosomes heteromorphisms and pericentric inversions in four autosomes (pairs 2, 3, 4 and 8, led to a variation of the autosomal arm numbers (fundamental number, FN from 78 to 82. Synaptonemal complex analyses revealed normal meiosis in males heterozygous for pericentric inversions. We found 39 different cytotypes, 27 of which are herein described for the first time. A literature survey revealed 46 described karyotypes for O. nigripes. We tested the hypothesis that chromosomal variants frequencies are dependent on geographical distribution and we propose a model for the karyotypical evolution of Oligoryzomys nigripes with 2n = 62/FN = 78-82.

  5. Using DNA Barcodes to Identify Road-Killed Animals in Two Atlantic Forest Nature Reserves, Brazil. (United States)

    Klippel, Angélica H; Oliveira, Pablo V; Britto, Karollini B; Freire, Bárbara F; Moreno, Marcel R; Dos Santos, Alexandre R; Banhos, Aureo; Paneto, Greiciane G


    Road mortality is the leading source of biodiversity loss in the world, especially due to fragmentation of natural habitats and loss of wildlife. The survey of the main species victims of roadkill is of fundamental importance for the better understanding of the problem, being necessary, for this, the correct species identification. The aim of this study was to verify if DNA barcodes can be applied to identify road-killed samples that often cannot be determined morphologically. For this purpose, 222 vertebrate samples were collected in a stretch of the BR-101 highway that crosses two Discovery Coast Atlantic Forest Natural Reserves, the Sooretama Biological Reserve and the Vale Natural Reserve, in Espírito Santo, Brazil. The mitochondrial COI gene was amplified, sequenced and confronted with the BOLD database. It was possible to identify 62.16% of samples, totaling 62 different species, including Pyrrhura cruentata, Chaetomys subspinosus, Puma yagouaroundi and Leopardus wiedii considered Vulnerable in the National Official List of Species of Endangered Wildlife. The most commonly identified animals were a bat (Molossus molossus), an opossum (Didelphis aurita) and a frog (Trachycephalus mesophaeus) species. Only one reptile was identified using the technique, probably due to lack of reference sequences in BOLD. These data may contribute to a better understanding of the impact of roads on species biodiversity loss and to introduce the DNA barcode technique to road ecology scenarios. PMID:26244644

  6. Using DNA Barcodes to Identify Road-Killed Animals in Two Atlantic Forest Nature Reserves, Brazil.

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    Angélica H Klippel

    Full Text Available Road mortality is the leading source of biodiversity loss in the world, especially due to fragmentation of natural habitats and loss of wildlife. The survey of the main species victims of roadkill is of fundamental importance for the better understanding of the problem, being necessary, for this, the correct species identification. The aim of this study was to verify if DNA barcodes can be applied to identify road-killed samples that often cannot be determined morphologically. For this purpose, 222 vertebrate samples were collected in a stretch of the BR-101 highway that crosses two Discovery Coast Atlantic Forest Natural Reserves, the Sooretama Biological Reserve and the Vale Natural Reserve, in Espírito Santo, Brazil. The mitochondrial COI gene was amplified, sequenced and confronted with the BOLD database. It was possible to identify 62.16% of samples, totaling 62 different species, including Pyrrhura cruentata, Chaetomys subspinosus, Puma yagouaroundi and Leopardus wiedii considered Vulnerable in the National Official List of Species of Endangered Wildlife. The most commonly identified animals were a bat (Molossus molossus, an opossum (Didelphis aurita and a frog (Trachycephalus mesophaeus species. Only one reptile was identified using the technique, probably due to lack of reference sequences in BOLD. These data may contribute to a better understanding of the impact of roads on species biodiversity loss and to introduce the DNA barcode technique to road ecology scenarios.

  7. Diet of Lontra longicaudis (Olfers, 1818 (Carnivora: Mustelidae in three limnic systems in Southern Rio Grande do Sul State, Brazil

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    Fernando Marques Quintela


    Full Text Available The aim of the present work was to study the diet of Lontra longicaudis in three limnic systems (anthropogenic shallow lakes, pluvial channel and coastal stream in Rio Grande do Sul State coastal plain, southern Brazil. Fishes were the most consumed item in all the three systems, being Mugilidae the most representative family in the pluvial channel and coastal stream and Cichlidae in the shallow lakes. Other identified items were mollusks, insects, crustaceans, amphibians, reptiles, birds and mammals and vegetal fragments. The high frequency of birds in the shallow lakes was remarkable, considering the lower frequencies of this item in previous investigations on the species diet. There was a high frequency of swamp eels (Synbranchidae, Synbranchus marmoratus in the pluvial channel and shallow lakes, which were usually absent or found in low frequencies in previous studies.

  8. Disposition and external morphology of hair on a female of the species otter Lutra longicaudis (Olfers, 1818 (Carnivora, Mustelidae

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    Arani Nanci Bonfim Mariano


    Full Text Available The aim of this study was to analyze aspects of the otter’s hair (Lutra longicaudis. Size, shape and number of hairs, as well as their layers and distribution on the skin were observed. To accomplish this purpose, 1mm2 of skin with its respective hair was removed from 44 points of the body surface and was examined under a stereoscopic microscope in order to be measured, counted and morphologically analyzed. The results were registered in histograms and schematic drawings and compared to the descriptions for other species. The covering hair reached a maximum height of 18mm and a minimum of 3.5mm, while wholly hair showed a maximum height of 11mm and a minimum of 1.5mm. The cuticle flake hairs of the covering coat modified, along the connecting rod according to its bore, shape, number and architecture. The cortex was thick in the portion where the covering coat took the form of a flattened spindle. The wholly coat was practically constituted by the cortex. The results obtained in this study suggest that the otter has a complex fur, different to the other animals. This is probably due mainly to its semi-aquatic habit.

  9. Public Participation as an Aid to Conserve Little Known Species: The Case of the Neotropical Otter Lontra Longicaudis (Olfers, 1818 in Central Mexico

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    Eric Ramírez-Bravo


    Full Text Available Public participation is often disregarded during conservation projects despite the potential benefits as it can help to determine priority areas for conservation in highly fragmented landscapes or to increase knowledge of little known species. However, there is no information about its potential application in Central Mexico. We undertook a preliminary assessment based on 30 interviews preformed between December 2011 and May 2012 with hunters aimed to determine the presence, feeding habits, reproduction periods, and –threats of the neotropical otter (Lontra longicaudis in a fragmented landscape in the Sierra Madre Oriental. Twenty three of the interviewed hunters indicated that the species is rare and considered to be solitary however, they have observed cubs and pregnant females feeding mainly on fish and crustaceans were made. Pollution, shortage of prey, habitat disturbance, and hunting were the main threats on the species. We verified the presence responses of the neotropical otter through field work and the life history information was obtained by doing a literature review. We concluded that public participation can be confidently incorporated in conservation plans of the neotropical otter in the Sierra Madre Oriental.

  10. Seasonal variation in the number of captures of Artibeus lituratus (Olfers, 1818 and Sturnira lilium (E. Geoffroy, 1810 (Chiroptera: Phyllostomidae in the upper strata of an Atlantic Forest remnant in southern Brazil

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    Fernando Carvalho


    Full Text Available This study aimed to analyze the occurrence of seasonal variations in the number of captures of Artibeus lituratus and Sturnira lilium in the upper strata of an Atlantic Forest remnant in southern Brazil. It was conducted in the town of Pedras Grandes, in the southern end of Santa Catarina. The chiropterans were captured with mist nets installed in the canopy and subcanopy. To check whether there were differences in the number of captures between seasons, we used the chi-square test (χ2, with a significance level of 0.05, and, whenever needed, partial χ2 tests. Artibeus lituratus showed significant differences between seasons, and the largest number of captures occurs in autumn. For S. lilium we did not observe statistically significant differences. The seasonal variation found out for A. lituratus may be related to its diet, which is based on fruits whose availability has seasonal variations. For S. lilium, besides the diet, mainly based on plants that do not have seasonal variations with regard to fruit availability, the altitude of the study area and its variations in temperature also seem to explain the absence of seasonal variation.

  11. Nuevos registros de Phthiraptera en cánidos y caprinos en Chile New records of Phthiraptera in domestic mammals in Chile

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    D González-Acuña


    Full Text Available Se cita para las especies domésticas Canis familiaris los Phthiraptera Linognathus setosus (von Olfers 1816 y Heterodoxus spiniger (Enderlein 1909, y para Capra hircus a Linognathus africanus Kellogg & Paine (Kellog and Paine 1911 provenientes de la provincia de Ñuble, VIII Región. Se discute la descripción de Heterodoxus longitarsus (Piaget 1880 hecha anteriormente en Chile y también la presencia de L. africanus en Chile.The presence of the Phthiraptera species Linognathus setosus (von Olfers 1816 and‘Heterodoxus spiniger (Enderlein 1909 on the domestic dog Canis familiaris, and Linognathus africanus (Kellog and Paine 1911 on Capra hircus are described in the province of Ñuble, 8th Region of Chile. The description of Heterodoxus longitarsus (Paiget 1880, and the presence of L. africanus in Chile is discussed.

  12. Small mammal community structure and microhabitat use in the austral boundary of the Atlantic Forest, Brazil


    Daniela O. de Lima; Bethânia O. Azambuja; Vagner L. Camilotti; Nilton C. Cáceres


    We investigated the richness, composition, and species relative abundance of a terrestrial small mammal community in a Deciduous Forest area in the austral boundary of the Atlantic Forest. The microhabitat use of the most common species was also investigated. Six rodents - Akodon montensis (Thomas, 1913), Oligoryzomys nigripes (Olfers, 1818), Sooretamys angouya (Thomas, 1913), Thaptomys nigrita (Lichtenstein, 1829), Mus musculus (Linnaeus, 1758) and Juliomys sp. - and one marsupial - Didelphi...

  13. Zooarqueologia dos mamíferos aquáticos e semi-aquáticos da Ilha de Santa Catarina, sul do Brasil

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    Pedro Volkmer de Castilho


    Full Text Available This study analyzes the use of aquatic mammals by prehistoric societies of Santa Catarina Island, Southern Brazil. Samples from two archaeological sites were examined: Rio do Meio (RM and Porto do Rio Vermelho (SCPRV. Nine aquatic mammal species were found: a pinnipeds: Arctocephalus australis (Zimmerman, 1783 and A. tropicalis (Gray, 1872, and b cetaceans: Eubalaena australis (Desmoulins, 1822, Delphinus delphis Linnaeus, 1758, Stenella frontalis (Cuvier, 1829, Steno bredanensis (Lesson, 1828, Tursiops truncatus (Montagu, 1821, Pontoporia blainvillei (Gervais & d'Orbigny, 1844 and a non-identified rorqual from the genus Balaenoptera Lacépède, 1804. Three especies of semi-aquatic mammals were also recorded: Hydrochoerus hydrochaeris (Linnaeus, 1758, Tapirus terrestris (Linnaeus, 1758 and Lontra longicaudis (Olfers,1818. Both sites presented similar species diversity, although abundance was greater at the most recent site (RM. There were more samples from axial skeletons, but in genera the anatomical regions were homogeneously distributed among the identified taxa.

  14. Appreciation to Spurious Breed of Morinda Root Med Mat%巴戟天真伪品种鉴别

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    巴戟天为茜草科植物巴戟天Morinda officinalis How的根。始载于《神农本草经》,列为上品。近来发现以茜草科植物羊角藤Morinda umbellata L、假巴戟Morinda shughua—eusis C.Y.Chen et M.S.Huang、四川虎刺Danmacantbus officinarum Huang、短刺虎刺Damnacanthus subspinosus Hand Mazz、虎刺Damnacanthus indicus Gaertn.f.及木兰科植物铁箍散Schisandra propinqua(WaH)Baill.Var.sinensis Oliv等植物的根混充巴戟天使用。现从性状、显微、理化等方面进行归纳比较鉴别,并编排检索表,以便查阅,供参考。

  15. Trophic ecology and the use of shelters and latrines by the Neotropical otter (Lontra longicaudis in the Taquari Valley, Southern Brazil Ecologia trófica e o uso de abrigos e latrinas pela lontra Neotropical (Lontra longicaudis no Vale do Taquari, Rio Grande do Sul, Brasil

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    Carlos Benhur Kasper


    Full Text Available This manuscript presents information about the ecology of Lontra longicaudis (Olfers, 1818 in the Taquari Valley, State of Rio Grande do Sul, southern Brazil. The study was carried out in two areas located in the Forquetinha Creek and in the Forqueta River from January to December 2003. The otters are specialist feeders (Bsta = 0.24, with a diet based mostly on fish, especially those of the families Loricariidae and Cichlidae. Most shelters used by the species were excavated burrows underneath tree roots, while shelters within rocks were used less frequently. The burrows showed great variation in size, being found on average 3.5 m (sd = 3.6 m away from the margin and 2.5 m (sd = 1.2 m above the water level. Scent marks were made preferentially on rocks and fallen tree trunks at the edge of the water. There was a tendency to increase the reutilization of latrines in detriment of using new sites throughout the sample period.O presente estudo apresenta dados sobre a ecologia de Lontra longicaudis (Olfers, 1818 no Vale do Taquari, sul do Brasil. O trabalho foi realizado em duas áreas localizadas no arroio Forquetinha e rio Forqueta, entre janeiro e dezembro de 2003. A população apresentou hábito alimentar especialista (Bsta = 0,24, baseado em peixes das famílias Loricariidae e Cichlidae. Os abrigos utilizados pela espécie foram formados em sua maioria, por escavações sob raízes de árvores e, com menor freqüência, entre rochas. Os abrigos escavados apresentaram dimensões bastante variáveis, sendo que estiveram em média a 3,5 m (s = 3,6 m de distância da margem e 2,5 m (s = 1,2 m de altura em relação ao nível da água. A utilização de marcas odoríferas se deu preferencialmente sobre rochas e troncos caídos na margem, sendo que houve uma tendência de aumento na reutilização de latrinas, em detrimento de novos pontos de deposição de fezes, no decorrer do período amostrado.

  16. Diversidade de morcegos (Mammalia, Chiroptera do Complexo Aporé-Sucuriú, Mato Grosso do Sul, Brasil Bat Diversity (Mammalia, Chiroptera from Aporé-Sucuriú's complex, Mato Grosso do Sul, Brazil

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    Marcelo O. Bordignon


    Full Text Available Realizou-se um inventário da fauna de morcegos entre abril e novembro de 2004 no norte de Mato Grosso do Sul, Brasil (Projeto Jauru/MMA. Oito pontos de coleta foram amostrados com redes-neblina em um ambiente de cerrado, sendo capturados 146 indivíduos de 28 espécies, distribuídos em seis famílias. O total de espécies neste estudo, representa apenas 30% da fauna de morcegos do cerrado. A família mais capturada foi a Phyllostomidae, representada por Glossophaga soricina (Pallas, 1766 e Artibeus lituratus (Olfers, 1818. Algumas espécies raras foram capturadas: Lophostoma brasiliense (Peters, 1866, Lonchophylla mordax Thomas, 1903 e Lionycteris spurrelli Thomas, 1913. O local de maior abundância (0,032 indivíduos/m²/h mostrou um índice de Simpson de D = 3.86 e o de menor abundância (0,003 indivíduos/m²/h um índice de Simpson de D = 3.03. A preservação dos mananciais de água e a cobertura florestal nestes pontos são discutidas.From April to November 2004 was made a bat fauna inventory in Northern of Mato Grosso do Sul, Brazil (Jauru's Project/MMA. Eight points was sampled with mist-nets in a cerrado's ecosystem and was caught 146 individuals de 28 species, distributed into six bat families. The total of species in this study just represents 30% of cerrado's bat fauna. The more caught family was Phyllostomidae represented by Glossophaga soricina (Pallas, 1766 and Artibeus lituratus (Olfers, 1818. Some rare species were caught: Lophostoma brasiliense (Peters, 1866, Lonchophylla mordax Thomas, 1903 and Lionycteris spurrelli Thomas, 1913. The more abundant point sampled (0.032 bat/m²/h shown a Simpson index of D = 3.86 and the low abundant point sampled (0.003 bat/m²/h was D = 3.03. The preservation of water springs and forest cover in study sites are discussed.

  17. Bats (Mammalia, Chiroptera in the Ponta Grossa region, Campos Gerais, Paraná, Brazil Morcegos (Mammalia, Chiroptera na região de Ponta Grossa, Campos Gerais, Paraná, Brasil

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    Cibele M. V. Zanon


    Full Text Available The diet, reproduction and activity time of bat species found in Ponta Grossa county, Campos Gerais region, were studied. Collections were conducted in four forest fragments, during 272 hours, on 48 m² of nets and roosting sites; the total capture effort was 1.52.10³ h.m². Eight species (247 individuals were registered: Artibeuslituratus (Olfers, 1818, Sturniralilium (E. Geoffroy, 1810, Desmodusrotundus (E. Geoffroy, 1810 (Phyllostomidae; Tadaridabrasiliensis (Desmarest, 1819, Eumopsauripendulus (Shaw, 1800 (Molossidae; Eptesicusbrasiliensis (Shaw, 1800, Myotisnigricans (Schinz, 1821, and Histiotusvelatus (I. Geoffroy, 1824 (Vespertilionidae. The Phyllostomidae family was the most frequently captured. Solanaceae, Moraceae, Piperaceae, and Rosaceae were found in the diet of frugivores; six orders of insects and the class Arachnida were found in the diets of insectivores. Pregnant females were found in September and October and lactating ones in November and December. The collection peak was reached in the second hour-and-a-half. Preservation of the regional forested and altered areas is required for survival of the local chiropterofauna.Estudou-se as espécies de morcegos presentes em Ponta Grossa, na região dos Campos Gerais, Paraná, com o objetivo de conhecer seus aspectos ecológicos básicos (dieta, reprodução e horário de atividade. Realizou-se coletas em quatro fragmentos florestais, onde foram empregadas 272 horas de esforço com 48 m² de redes, e em locais de repouso, totalizando um esforço de captura de 1,52.10³ h.m². Registrou-se 247 indivíduos, de oito espécies: Artibeuslituratus (Olfers, 1818, Sturniralilium (E. Geoffroy, 1810, Desmodusrotundus (E. Geoffroy, 1810 (Phyllostomidae; Tadaridabrasiliensis (Desmarest, 1819, Eumopsauripendulus (Shaw, 1800 (Molossidae; Eptesicusbrasiliensis(Shaw, 1800, Myotisnigricans (Schinz, 1821, Histiotusvelatus (I. Geoffroy, 1824 (Vespertilionidae. Phyllostomidae foi a família mais

  18. Small mammal community structure and microhabitat use in the austral boundary of the Atlantic Forest, Brazil

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    Daniela O. de Lima


    Full Text Available We investigated the richness, composition, and species relative abundance of a terrestrial small mammal community in a Deciduous Forest area in the austral boundary of the Atlantic Forest. The microhabitat use of the most common species was also investigated. Six rodents - Akodon montensis (Thomas, 1913, Oligoryzomys nigripes (Olfers, 1818, Sooretamys angouya (Thomas, 1913, Thaptomys nigrita (Lichtenstein, 1829, Mus musculus (Linnaeus, 1758 and Juliomys sp. - and one marsupial - Didelphis albiventris (Lund, 1840 - were captured. Thaptomys nigrita is recorded in the state of Rio Grande do Sul for the first time. Species richness was poor when compared with communities in the central portions of the Atlantic Forest, but equivalent to that found in the Araucaria and Dense Ombrophilous forests of southern Brazil. The species most often captured in our study, A. montensis and O. nigripes, are also the most common in the majority of faunistic studies carried out in the Atlantic Forest. Akodon montensis and S. angouya used places with high abundance of bamboo, possibly to avoid predators. Oligorizomys nigripes used areas with a high density of scrubs, what could facilitate aboveground movements, and was negatively correlated to mature forest indicators, which reinforce the idea that this species has opportunistic habits.

  19. Land fauna composition of small mammals of a fragment of Atlantic Forest in the State of Sao Paulo, Brazil

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    Darci Moraes Barros-Battesti


    Full Text Available The Atlantic Forest small mammal land fauna, except bats, and the abiotic factors that might have an influence on its composition, were studied in the Itapevi County, State of Sao Paulo, a forested region, partly altered by antropic action, from January, 1995 to June, 1996. The trapping effort consisted of 2,888 trap-nights, resulting in a 4.6% trapping success and consisted of monthly trappings, for five consecutive days. During this period, 134 specimens were captured, of which 46.3% were Didelphimorphia and 53.7% were Rodentia. Eleven species were registered: two Didelphimorphia: Didelphis marsupialis (Linnaeus, 1758 and Marmosops incanus (Lund, 1841, and nine Rodentia: Akodon cursor (Winge, 1887, Bolomys lasiurus (Lund, 1841, Oxymycterus hispidus Pictet, 1843, Oxymycterus nasutus (Waterhouse, 1837, Oligoryzomys nigripes (Olfers, 1818, Oryzomys angouya (Fischer, 1814, Raltus norvegicus (Berkenhout, 1769, Euryzygomatomys spinosus (G. Fischer, 1814 and Cavia aperea Erxleben, 1777. The relative density indices were correlated with meteorological data by Spearman and Pearson coefficients. For marsupials these correlations were not significant. For rodents, the correlations were significant and directly related to lower temperature and rainfall indices (p<0.05. During the dry season the occurrence of small mammals was 50% greater than during the wet season, probably due to foraging strategies in the studied fragment of Atlantic Forest.

  20. Population ecology of small rodents and marsupials in a semi-deciduous tropical forest of the southeast Pantanal, Brazil

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    Cecilia S. de Andreazzi


    Full Text Available The Pantanal is a South American biome characterized by extensive plains and stark environmental seasonality. Several habitats are subject to annual flooding, forcing small mammal species to aggregate in dry forest patches, which most likely influences their population dynamics and life history strategies. In order to investigate the seasonal influence on the life history traits of these small mammals, we conducted a 2-year mark-recapture study in the southeastern region of the Brazilian Pantanal (Nhecolândia and analyzed the population dynamics of the most abundant small mammal species with the jackknife estimator. A trapping effort of 21,560 trap-nights resulted in 615 individuals in 1,171 captures (success = 5.43%. Three species of rodents - Oecomys mamorae (Thomas, 1906, Thrichomys pachyurus (Wagner, 1845, and Clyomys laticeps (Thomas, 1841 - and three species of marsupials - Gracilinanus agilis (Burmeister, 1854, Thylamys macrurus (Olfers, 1818, and Monodelphis domestica (Wagner, 1842 - were obtained. The most abundant species was O. mamorae, followed by G. agilis and T. pachyurus. Oecomys mamorae was more abundant in the wet season and presented an opportunistic reproductive strategy. Gracilianus agilis displayed increased population sizes in the dry season and synchronized, seasonal reproduction during the rainy season. Thrichomys pachyurus had a small population size, delayed response to variations in environmental conditions and higher reproductive rates in the dry season. All species revealed different life history strategies (seasonal, opportunistic or delayed response to environmental variations, coinciding with periods of higher resource availability in order to maximize survival.

  1. Dados ecológicos dos quirópteros da Reserva Volta Velha, Itapoá, Santa Catarina, Brasil Ecological data of Chiroptera from Reserva Volta Velha, Itapoá, Santa Cantarina, Brazil

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    Elenise A. Bastos Sipinski


    Full Text Available A study on the ecology of Chiroptera was made at the Reserve of Volta Velha on the Northern coast of Santa Catarina. This study aimed at knowing the frequency of the individuals colleeted in each season, part of their feeding diet and their time of activity as well as their breeding activity. The investigation was carried out from March, 1990 to February, 1991 by means of periodical captures which ocurred during four days each month totalizing 144 hours of net use. One hundred and thirty-five individuals belonging to 15 different species were caught. Sturnira lilium (Geoffroy, 1810, Artibeus lituratus (Olfers, 1818 and Myotis nigricans (Schinz, 1821 were captured in the highest number throughout the seasons of the year. Fruit-eating bats confirm their feeding preference for Cecropiaceae, Solanaceae. Myrtaceae and Piperaceae. The births occurred mostly in seasons other than the dry. Around 1:15 hours after sunset was the time when the highest numher of individuals were collected in the nets.

  2. Quirópteros do Parque Estadual da Pedra Branca, Rio de Janeiro, Brasil (Mammalia, Chiroptera Bats from Pedra Branca State Park, Rio de Janeiro, Brazil (Mammalia, Chiroptera

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    Daniela Dias


    Full Text Available A survey of chiropteran fauna was conducted during the period from March 1994 to May 1998 in Pedra Branca State Park, Rio de Janeiro, Rio de Janeiro State. A total of 681 specimens of 24 species were recorded: Chrotopterus auritus (Peters, 1856; Micronycteris megalotis (Gray, 1842; Micronycteris minuta (Gervais, 1856; Mimmon bennettii (Gray, 1838; Phyllostomus hastatus (Pallas, 1767; Tonatia bidens (Von Spix, 1823; Lonchophylla bokermanni Sazima, Vizotto & Taddei, 1978; Lonchophylla mordax Thomas, 1903; Anoura caudifera (E. Geoffroy, 1818; Glosso-phaga soricina (Pallas, 1766; Carollia perspicillata (Linnaeus, 1758; Artibeus fimbriatus Gray, 1838; Artibeus lituratus (Olfers, 1818; Artibeus obscuras Schinz, 1821; Chiroderma doriae Thomas, 1891; Platyrrhinus lineatus (E. Geoffroy, 1810; Platyrrhinus recifinus (Thomas, 1901; Sturnira lilium (E. Geoffroy, 1810; Vampyressa pusilla (Wagner, 1843; Desmodus rotundus (E. Geoffroy, 1810; Diphylla ecaudata Von Spix, 1823; Eptesicus brasiliensis (DesMarest, 1819; Myotis nigricans (Schinz, 1821 and Molossus molossus (Palas, 1766. One external (forearm length and 13 cranial meansurements were studied for 23 species. The meansurements of male and female specimens were treated separately. Comments about some taxonomic respects for some species studied are also included.

  3. Description of Litomosoides ysoguazu n. sp. (Nematoda, Onchocercidae), a parasite of the tuft-toed rice rat Sooretamys angouya (Fischer) (Rodentia: Cricetidae), and a first record of L. esslingeri Bain, Petit & Berteaux, 1989 in Paraguay. (United States)

    Notarnicola, Juliana; de la Sancha, Noé Ulises


    Paraguay is a small landlocked country whose mammalian fauna is among the least studied in South America, as well as their parasites. As a result of a study of the effects of habitat fragmentation on small mammal biodiversity in eastern Paraguay, we have collected some parasites of cricetid rodents. Herein, we describe a new species of Litomosoides Chandler, 1931 parasitising the body cavity of the tuft-toed rice rat Sooretamys angouya (Fischer) and Litomosoides esslingeri Bain, Petit & Diagne, 1989 parasitising Oligoryzomys nigripes (Olfers), thus expanding its geographical distribution into Paraguay. Litomosoides ysoguazu n. sp. is characterised by the large size of the females (92.2-117.6 mm long) and by having buccal capsule with an anterior widening with rounded edges on the chitinous segment and a rounded widening at the base; male tail with a single pair of adcloacal papillae, three to five pairs of asymmetrical postcloacal papillae, and one or two unpaired papillae in the median ventral line; spicules corresponding to the "sigmodontis" species group; and microfilaria with a sheath stuck to the body and visible in the anterior extremity. We also describe a fourth-stage female larva. Oligoryzomys nigripes is a new host record of L. esslingeri; this enlarges the host record to eight species highlighting the low specificity of this species.

  4. Tooth reorientation affects tooth function during prey processing and tooth ontogeny in the lesser electric ray, Narcine brasiliensis. (United States)

    Dean, Mason N; Ramsay, Jason B; Schaefer, Justin T


    The dental anatomy of elasmobranch fishes (sharks, rays and relatives) creates a functional system that is more dynamic than that of mammalian dentition. Continuous dental replacement (where new teeth are moved rostrally to replace older ones) and indirect fibrous attachment of the dentition to the jaw allow teeth to reorient relative to the jaw over both long- and short-term scales, respectively. In this study, we examine the processing behavior and dental anatomy of the lesser electric ray Narcine brasiliensis (Olfers, 1831) to illustrate that the freedom of movement of elasmobranch dentition allows a functional flexibility that can be important for complex prey processing behaviors. From static manipulations of dissected jaws and observations of feeding events in live animals, we show that the teeth rotate during jaw protrusion, resulting in a secondary grasping mechanism that likely serves to hold prey while the buccal cavity is flushed free of sediment. The function of teeth is not always readily apparent from morphology; in addition to short-term reorientation, the long-term dental reorientation during replacement allows a given tooth to serve multiple functions during tooth ontogeny. Unlike teeth inside the mouth, the cusps of external teeth (on the portion of the tooth pad that extends past the occlusal plane) lay flat, such that the labial faces act as a functional battering surface, protecting the jaws during prey excavation.

  5. A field comparison of two capture-mark-recapture estimators of small mammal populations

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    Rosana Gentile


    Full Text Available The results obtained by two estimators of population sizes, MNKA and Mh, were compared for four species of small mammmals - Didelphis aurita Wied, 1826, Philander frenata (Olfers, 1818, Nectomys squamipes (Brants, 1827 and Akodon cursor (Winge, 1887 - during a long-term population study. The MNKA estimator consistently underestimated the population sizes in relation to Mh. On the other, the probabilistic estimator Mh, which reduces bias through the jackknife technique, could not be used in all cases as its assumptions were not always met. Correction factors between the estimates obtained by the two methods were calculated for the last three species, for which catchability did not vary significantly in time and that presented positive correlation between the estimates by the two models. In order to combine the adavantages of both methods for small mammal population studies, is suggested the use of probabilistic closed population models and to calculate a correction factor based in another model which allow estimates in all cases, and which provides correlated estimates. This correction factors should be used in those cases where the probabilistic model cannot be used.

  6. Morcegos (Chiroptera da área urbana de Londrina, Paraná, Brasil Bats (Chiroptera of the urban area of Londrina, Paraná, Brazil

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    Nélio Roberto dos Reis


    Full Text Available Study carried out within the urban perimeter of Londrina, which is located in the North of the state of Paraná. The objectives were the identification of urban species of bats and diurnal roosts used by them and the verification of the problems they can cause to the population. The fire brigade, the Autarquia Municipal do Ambiente de Londrina (Municipal Environment Autarchy of Londrina, the Biology Department of the Universidade Estadual de Londrina (State University of Londrina and local residents helped spot the roosts. The collections were carried out in regular intervals between April 1998 and March 1999. By the end of them, 815 bats of 23 different species had been captured. Among these, 12 were found near or inside human constructions: Noctilio albiventris Desmarest, 1818; Artibeits lituratus (Olfers, 1818; Platyrrhinus lineatus (E. Geoffroy, 1810; Eptesicus brasiliensis Desmarest 1819; Lasiurus bore-alls (Muller 1776; Lasiurus ega (Gervais, 1856; Eumops glaucinus (Wagner, 1843; Molossus rufus (E. Geoffroy, 1805; Molossus molossus (Pallas, 1766; Nyctinomops laticaudatus (E. Geoffroy, 1805; Nyctinomops macrotis (Gray, 1840 e Tadarida brasiliensis (i. Geoffroy, 1824. Roost sites comprised expansion joints, roofs, attics and parks, among others. It can be concluded that bats are treated as undesirable animals by the population due to the lack of knowledge about the subject.

  7. Fruit removal of a wild tomato, Solanum granulosoleprosum Dunal (Solanaceae, by birds, bats and non-flying mammals in an urban Brazilian environment

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    Cáceres Nilton Carlos


    Full Text Available A study of removal of fruits of the wild tomato, Solanum granulosoleprosum Dunal (N = 5 plants, by vertebrates was carried out in an urban environment of southern Brazil from January to May 1997 and February 1998. To verify diurnal and nocturnal removals, fruits were counted in several fruit bunches, being classified by size and color. Diurnal observations were made on plants to verify bird removal. A mist net was placed among the plants from the evening to 23:00 h to verify bat consumption. Live traps baited with S. granulosoleprosum fruits were placed on the ground among plants to verify terrestrial removers. On average it was found two ripe fruits available per bunch/day, but unripe, small, fruits were dominant (70%. Nocturnal mammals and birds-diurnal mammals partitioned fruits similarly. Bats removing fruits were Artibeus lituratus (Olfers, 1818, Pygoderma bilabiatum (Wagner, 1843 and Sturnira lilium (E. Geoffroy, 1810. Birds were Saltator similis Lafresnaye & d'Orbigny, 1837 and Thraupis sayaca (Linnaeus, 1766. Terrestrial mammals were a marsupial and three rodent species. Except for rodents, these vertebrates must be promoting the seed dispersal of S. granulosoleprosum seeds in disturbed mixed forests of southern Brazil.

  8. Trophic ecology of Lontra longicaudis (Carnivora, Mustelidae in lotic and semilotic environments in southeastern Brazil Ecologia trófica de Lontra longicaudis (Carnivora, Mustelidae em ambientes lótico e semilótico no sudeste do Brasil

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    Lívia B. Santos


    Full Text Available Lontra longicaudis (Olfers, 1818 (Carnivora, Mustelidae is a semi-aquatic animal spread through the Central and South America, except in Chile. The implantation of a hydroelectric power plant along a river alters the dynamics of the watercourse, transforming a lotic environment into a lentic or semilotic one, what can damage the otter's feeding. From April 2008 to March 2009 we analysed the otter's food habits in lotic (streamlet and semilotic (hydroelectric reservoir environments of Paranapanema Valley, in southeastern Brazil. Aiming to compare the otter's diet of these two environments, we analyzed statistically the frequency of occurrence of main items in the scats. Fishes represent the base of the diet both in the reservoir and in the streamlet and, despite of the total otter's diet showing up similarities in the two environments, the results evidenced modifications on the fish species consumed between them. In the reservoir the otters ate more exotic fish Oreochromis niloticus (Linnaeus, 1758 probably because it is an easy capture prey in this place. The fact that the otters get established and feed in the reservoir doesn't mean that this structure is benefic to the species because the food supplied for it consists mainly of exotic fish species.Lontra longicaudis (Olfers, 1818 (Carnivora: Mustelidae é um animal semi-aquático com distribuição nas Américas Central e do Sul, exceto no Chile. A implantação de uma usina hidrelétrica em um rio altera a dinâmica do curso d'água, transformando um ambiente lótico em um lêntico ou semilótico, o que pode prejudicar a alimentação das lontras. De abril de 2008 a março de 2009 foi analisado o hábito alimentar das lontras em um ambiente lótico (riacho e semilótico (reservatório hidrelétrico no Vale do Paranapanema, sudeste do Brasil. Visando comparar a dieta das lontras nessas duas áreas analisamos estatisticamente a frequência de ocorrência dos principais itens nas fezes. Peixes

  9. Systematic studies of Oryzomyine rodents (Muridae, Sigmodontinae): diagnoses and distributions of species formerly assigned to Oryzomys 'capito' (United States)

    Musser, G.G.; Carleton, M.D.; Brothers, E.M.; Gardner, A.L.


    We describe the morphological species-boundaries and geographic distributions of ten Neotropical Oryzomys based on analyses of museum specimens (skins and skulls, examples preserved in fluid, chromosomal spreads, and information about collection sites from skin tags, field catalogs, and other sources). These species have been regarded as members of an Oryzomys capito complex and for a long time were consolidated into a single entity identified as O. capito. Our study documents the following: 1. Defining the limits of species within the O. capito complex first requires a comprehensive review and rigorous definition of O. capito itself. We consider Fischer's (1814) Mus megacephalus to be valid and available, designate a neotype to bear the name, and reinstate it as a senior synonym of capito Olfers (1818). We then provide a working definition of O. megacephalus and its close relative, O. laticeps, derived from analyses of morphometric variation, estimates of geographic distributions, and evaluations of synonyms. In our view, O. megacephalus occurs in Amazonia but also extends into eastern Paraguay; its synonyms are capito Olfers (1818), cephalotes Desmarest (1819), velutinus Allen and Chapman (1893), goeldi Thomas (1897), modestus Allen (1899), and perenensis Allen (1901). Oryzomys laticeps Lund (1840) occurs in the Atlantic Forest region of eastern Brazil. We designate a lectotype for laticeps and allocate the names saltator Winge (1887) and oniscus Thomas (1904) as synonyms. 2. We provide the first comprehensive taxonomic revision of Oryzomys yunganus Thomas (1902). Its range covers tropical evergreen rainforest formations in the Guiana region and the Amazon Basin where, as documented by voucher specimens, it has been collected at the same localities as O. megacephalus, O. nitidus, and O. tern of carotid arterial circulation, occlusal patterns of second upper and lower molars, cranial proportions, and chromosomal features. Appreciable intraspecific geographic

  10. Moscas ectoparasitas (Diptera, Streblidae de morcegos (Chiroptera, Phyllostomidae no sul do Brasil: associações hospedeiros-parasitos e taxas de infestação Ectoparasitic flies (Diptera, Streblidae of bats (Chiroptera, Phyllostomidae in southern Brazil: hosts-parasites associations and infestation rates

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    Ana M. Rui


    Full Text Available As associações hospedeiros-parasitos e as taxas de infestação de dípteros ectoparasitos da família Streblidae foram estudadas em morcegos da família Phyllostomidae na Floresta Atlântica no extremo sul do Brasil. Para as espécies mais abundantes de filostomídeos, foi examinado se há diferenças nos valores de prevalência e intensidade média dos ectoparasitos nas diferentes estações do ano e conforme sexo e idade do hospedeiro. Em quatro espécies de filostomídeos (Anoura caudifera (E. Geoffroy, 1818, Artibeus fimbriatus Gray, 1838, Artibeus lituratus (Olfers, 1818 e Sturnira lilium E. Geoffroy, 1810 foram coletados 118 indivíduos de sete espécies de Streblidae (Anastrebla caudiferae Wenzel, 1976, Megistopoda aranea (Coquillett, 1899, Megistopoda proxima (Séguy, 1926, Metelasmus pseudopterus Coquillett, 1907, Paratrichobius longicrus (Miranda Ribeiro, 1907, Trichobius phyllostomae Kessel, 1925 e Trichobius tiptoni Wenzel, 1976. Para A. lituratus, A. fimbriatus e S. lilium, as taxas de infestação foram baixas e houve uma tendência à infestação ser maior no verão e outono, fato provavelmente relacionado à sazonalidade de temperatura na região, que afeta as taxas reprodutivas e a mortalidade dos ectoparasitos. A infestação por P. longicrus em A. lituratus não foi afetada pelo sexo e idade do hospedeiro. Para S. lilium, a infestação por M. proxima não foi afetada por sexo e idade do hospedeiro, com exceção da maior prevalência de ectoparasitos em indivíduos jovens. Os dados indicam que não existem diferenças comportamentais ligadas a sexo e idade do hospedeiro que favoreçam ou comprometam a infestação por Streblidae nestas espécies de morcegos filostomídeos.Hosts-parasites associations, including infestation rates, between ectoparasitic bat flies of the family Streblidae and bats of the family Phyllostomidae were studied in Atlantic Forest habitats in southern Brazil. For the more abundant phyllostomid bats

  11. Phylogeny of Thylamys (Didelphimorphia, Didelphidae species, with special reference to Thylamys karimii Filogenia das espécies de Thylamys (Didelphimorphia, Didelphidae, com ênfase a Thylamys karimii

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    Bianca de A Carvalho


    Full Text Available The genus Thylamys Gray, 1843 lives in the central and southern portions of South America inhabiting open and shrub-like vegetation, from prairies to dry forest habitats in contrast to the preference of other Didelphidae genera for more mesic environments. Thylamys is a speciose genus including T. elegans (Waterhouse, 1839, T. macrurus (Olfers, 1818, T. pallidior (Thomas, 1902, T. pusillus (Desmarest, 1804, T. venustus (Thomas, 1902, T. sponsorius (Thomas, 1921, T. cinderella (Thomas, 1902, T. tatei (Handley, 1957, T. karimii (Petter, 1968, and T. velutinus (Wagner, 1842 species. Previous phylogenetic analyses in this genus did not include the Brazilian species T. karimii, which is widely distributed in this country. In this study, phylogenetic analyses were performed to establish the relationships among the Brazilian T. karimii and all other previously analyzed species. We used 402-bp fragments of the mitochondrial cytochrome b gene, and the phylogeny estimates were conducted employing maximum parsimony (MP, maximum likelihood (ML, Bayesian (BY, and neighbor-joining (NJ. The topologies of the trees obtained in the different analyses were all similar and pointed out that T. karimii is the sister taxon of a group constituted of taxa from dry and arid environments named the dryland species. The dryland species consists of T. pusillus, T. pallidior, T. tatei, and T. elegans. The results of this work suggest five species groups in Thylamys. In one of them, T. velutinus and T. kariimi could constitute a sister group forming one Thylamys clade that colonized Brazil.O gênero Thylamys Gray, 1843 ocorre na região central e ao sul da América do Sul, habitando vegetações abertas e arbustivas, desde pradarias até florestas de ambientes secos, em contraste à preferência por habitats mais úmidos dos outros gêneros de Didelphidae. O gênero inclui T. elegans (Waterhouse,1839, T. macrurus (Olfers, 1818, T. pallidior (Thomas, 1902, T. pusillus

  12. Frugivoria em morcegos (Mammalia, Chiroptera no Parque Estadual Intervales, sudeste do Brasil Frugivory in bats (Mammalia, Chiroptera at the Intervales State Park, Southeastern Brazil

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    Fernando C. Passos


    Full Text Available This study was carried out at the Intervales State Park, an Atlantic Rain Forest area in Southeastern Brazil. Bats were monthly mist netted over a full year, and fecal samples were collected for dietary analysis. The seeds found in each sample were identified in the laboratory under a stereoscopic microscope by comparison with seeds taken from ripe fruits collected in the study area. Three hundred and seventy one bats were collected, of which 316 (85.2% were frugivorous. The total number of fecal samples with seeds and/or pulp was 121. Sturnira lilium (E. Geoffroy, 1810 was the most abundant species in the study area (n = 157 captures and Solanaceae fruits accounted for 78.5% of the fecal samples with seeds (n = 56. Artibeus fimbriatus Gray, 1838 (n = 21 samples fed mostly on Cecropiaceae (38% and Moraceae fruits (24%, and Artibeus lituratus (Olfers, 1818 (n = 7 samples on Cecropiaceae (57% and Moraceae (29%. Carollia perspicillata (Linnaeus, 1758 (n = 16 samples fed mostly on Piperaceae fruits (56,3%, but Solanaceae (31,3% and Rosaceae seeds (12,5% were also found in feces. Overall, seeds found in bat feces belong to eight plant families: Solanaceae (n = 67 samples; Cecropiaceae (n = 14; Piperaceae (n = 14; Moraceae (n = 8; Rosaceae (n = 3; Cucurbitaceae (n = 3; Cluseaceae (n = 1, and Araceae (n = 1. The close association of different bat species with fruits of certain plant families and genus may be related to a possible mechanism of resource partitioning that shapes the structure of the community.

  13. Mamíferos carnívoros e sua relação com a diversidade de hábitats no Parque Nacional dos Aparados da Serra, sul do Brasil Carnivore mammals and their relation with habitat diversity in Aparados da Serra National Park, southern Brazil

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    Maria de Fátima M. dos Santos


    Full Text Available A survey of carnivore mammals was accomplished in Aparados da Serra National Park from February 1998 to March 2000. The park has 10,250 ha and is considered a biodiversity core area of the Atlantic Forest Biosphere Reserve in the Rio Grande do Sul State, Brazil. The landscape is characterized by relatively well preserved relicts of Araucaria angustifolia (Bertol. Kuntze forest, grasslands and Atlantic Forest, which have contributed for the survival of endangered carnivore mammals. The National Park was divided in a grid of 16 km² cells using a 1:50,000 scale map. The animals were recorded using indirect methods, by identifying signs (scats, tracks and direct observation in 2.5 km long and 5 m wide transects, with 10 replicates in each grid cell. Interviews with local people were also used to confirm the animal presence. A total of 13 species was recorded: Procyon cancrivorus (Cuvier, 1798, Pseudalopex gymnocercus (G. Fischer, 1814, Leopardus pardalis (Linnaeus, 1758 and Cerdocyon thous (Linnaeus, 1766 were the most frequent species registered. Nasua nasua (Linnaeus 1766, Herpailurus yaguarondi (Lacépède, 1809, Chrysocyon brachyurus (Illiger, 1815, Eira barbara (Linnaeus, 1758, Leopardus sp., Puma concolor (Linnaeus, 1771, Galictis cuja (Molina, 1782, Conepatus chinga (Molina, 1892 and Lontra longicaudis (Olfers, 1818 showed lower frequencies. The Park presented areas with significant differences (Mantel Test, P< 0.05 in species richness and composition related to habitat classes. Areas with high habitat richness presented high species richness. The Araucaria forest was the habitat that presented the higher carnivore richness. The border areas of the Park are influenced by several environmental degradation factors that could be affecting the distribution of carnivores.

  14. Microsatellite genotyping from faeces of Lontra longicaudis from southern Brazil Genotipagem através de microsatélites extraídos de amostras fecais em Lontra longicaudis do sul do Brasil

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    Laura I. Weber


    Full Text Available A genetic study of the neotropical river otter Lontra longicaudis (Olfers, 1818, which has an unknown conservation status, was carried out at the Taim Ecological Station and the margins of the Vargas stream, Rio Grande do Sul, southern Brazil. Faecal samples were collected, and DNA was extracted using a silica-guanidine method. Five microsatellite loci were amplified using PCR with heterologous primers previously described for Lutra lutra (Linnaeus, 1758. Sixteen faecal samples out of 29 from Taim and 11 out of 14 from Vargas stream margins contained enough DNA for genetic analysis. A total of 49 different alleles were found at both localities, from which 18 were exclusively found in individuals from Taim and 17 were exclusives from Vargas individuals. The most common allele was the same at both locations for three loci (Lut715, Lut733, and Lut818. A high level of genetic diversity was found at both sites (NeTaim=4.1, HoTaim=0.299, HeTaim=0.681; NeVargas=4.9, HoVargas=0.355, HeVargas=0.724, being higher at the Vargas stream site. A high and significant level of heterozygote deficiency was observed at most loci according to the χ2 test. The homogeneity χ2 test (PA lontra neotropical de rio Lontra longicaudis (Olfers, 1818, cujo estado de conservação é ainda desconhecido, foi estudada geneticamente na Estação Ecológica do Taim e nas margens do arroio Vargas, RS, sul do Brasil. Amostras de fezes foram coletadas e o DNA foi extraído por um método de sílica-guanidina. Cinco locos de microsatélites foram amplificados por PCR utilizando primers heterólogos previamente descritos para Lutra lutra (Linnaeus, 1758. Dezesseis amostras de fezes de um total de 29 coletadas no Taim e onze das 14 obtidas no arroio Vargas contiveram DNA suficiente para prosseguir com a analise genética. Um total de 49 alelos foram obtidos, dos quais 18 foram exclusivos de indivíduos do Taim e 17 exclusivos dos indivíduos do arroio Vargas. Em três locos (Lut715

  15. Anomalias e variações na fórmula dentária em morcegos do gênero Artibeus Leach (Chiroptera, Phyllostomidae Anomalies and variation in the dental formula of bats of the genus Artibeus Leach (Chiroptera, Phyllostomidae

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    Ana Maria Rui


    Full Text Available Descreve-se a ocorrência e analisa-se as causas de anomalias dentárias em Artibeus lituratus (Olfers, 1818 e A. fimbriatus Gray, 1838 (Chiroptera: Phyllostomidae provenientes de populações do Estado do Rio Grande do Sul, sul do Brasil. São discutidas, com base no material examinado e em ampla revisão da literatura, as variações quanto à presença dos terceiros molares superior e inferior entre diferentes espécies de Artibeus Leach, 1821. Foram analisados 104 crânios de A. lituratus e 44 de A. fimbriatus quanto à fórmula dentária. Em A. lituratus ocorreram dois casos de dentes extranumerários, um incisivo superior e um terceiro molar superior direito, e um de agênese dentária dos terceiros molares inferiores. Em A. fimbriatus constatou-se a ocorrência de um segundo pré-molar superior direito extranumerário. As ocorrências do terceiro molar superior em A. lituratus e do segundo pré-molar superior em A. fimbriatus são casos de atavismos. Em Artibeus (Artibeus ocorrem variações quanto à presença do terceiro molar superior, de maior ou menor intensidade, em praticamente todas as espécies. Estas variações ocorrem tanto a nível intrapopulacional quanto geográfico. Já o terceiro molar inferior está ausente em baixa freqüência em várias populações de diferentes espécies. Os terceiros molares superiores e inferiores estão em processo de desaparecimento na linhagem dos Artibeus (Artibeus. O fato destes dentes já não ocorrerem em algumas espécies, terem ocorrência variável em outras e serem sempre estruturas reduzidas e simplificadas, sem função na mastigação, são indicativos deste processo evolutivo. A variação intensa observada quanto à ocorrência do terceiro molar superior inviabiliza o seu uso como caráter útil na identificação de espécies.This paper describes and analyzes the causes of dental formula anomalies in the bats Artibeus lituratus (Olfers, 1818 and Artibeus fimbriatus Gray, 1838

  16. Combate ao Desmodus rotundus rotundus (E. Geoffroy,1810 na região cárstica de Cordisburgo e Curvelo, Minas Gerais

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    Almeida E.O.


    Full Text Available Com o objetivo de avaliar em uma região cárstica o tipo de refúgio, as espécies de morcegos, a população de animais domésticos, as associações interespecíficas nas coabitações com outros mamíferos silvestres suscetíveis à raiva e a eficácia da warfarina aplicada no dorso do Desmodus rotundus rotundus foi realizada uma pesquisa de maio de 1998 a março de 2000, nos municípios de Cordisburgo e Curvelo, Minas Gerais. Em 49 refúgios vistoriados, 29 naturais e 20 artificiais, localizados em 14 propriedades, encontrou-se o Desmodus rotundus rotundus em 18 abrigos naturais. Destes, 17 eram cavernas formadas pela dissolução ou abatimento de rocha calcária, típica do carste, e um era túnel escavado na terra pela ação das águas de um rio. As características geomorfológicas e de localização espacial foram registradas com base nas coordenadas geográficas, obtidas com auxílio de um sensor geográfico de posição. Nesses abrigos foram capturados e identificados 1457 morcegos de 14 espécies, sendo 640 Glossophaga soricina (Pallas, 1766, 566 Desmodus rotundus (E. Geoffroy, 1810, 73 Anoura geoffroyi (Gray 1838, 58 Trachops cirrhosus (Spix, 1823, 38 Diphylla ecaudata ecaudata (Spix, 1823, 23 Platyhrrinus lineatus (E. Geoffroy, 1810, 16 Lasiurus ega (Gervais, 1856, 14 Carollia perspicillata (Linnaeus, 1758, 13 Phyllostomus hastatus hastatus (Pallas, 1767, 9 Artibeus lituratus (Olfers, 1818, 3 Mimmon bennettii (Gray, 1838, 2 Myotis nigricans (Schinz, 1821, 1 Eptesicus brasiliensis (Desmarest, 1819 e 1 Pygoderma bilabiatum (Wagner, 1843. Não se conseguiu isolar ou detectar o vírus rábico no cérebro de 25 hematófagos selecionados e em 52 de outras espécies. A maioria desses abrigos também era usada por pacas (Agouti paca Linnaues, 1766, capivaras (Hydrochaeris hydrochaeris, Linnaues, 1766, guaxinins (Procyon cancrivorus, G. Cuvier, 1798 e raposas (Lycalopex vetulus, Lund, 1842 que são suscetíveis à raiva. Em 546 Desmodus