14 research outputs found

    Ecologia da jaguatirica (Leopardus pardalis) na Floresta Atlântica do sul do Brasil

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    The ocelot Leopardus pardalis is a medium-sized Neotropical spotted cat with a wide geographic range. The present study was conducted in a reserve in an Atlantic Forest area in southern Brazil, and provided information on ocelot ecology through photographic records. Density estimated by the half of the mean maximum distance moved method resulted in 0.04 ocelots per km2. The minimum home range sizes were obtained by the minimum convex polygon method and were in agreement with other studies for the males recorded. Our female’s home range size was smaller than ranges reported elsewhere. The nocturnal pattern recorded is probably related with prey activity, since it is suggested that ocelots adjust their movements to the probabilities of encountering local prey, or with an evolutionary factor, aiming to avoid competition/predation with larger cats. The low density observed could be a consequence of the conditions of the study area, small and isolated, which indicates the necessity for larger reserves and mechanisms to connect isolated populations. Key words: camera trap, Felidae, individual recognition, spot pattern, activity pattern.A jaguatirica Leopardus pardalis é um gato pintado neotropical de porte médio e com ampla distribuição geográfica. O presente estudo foi conduzido em uma reserva em área de Floresta Atlântica no sul do Brasil e forneceu informações a respeito da ecologia da espécie, por meio de registros fotográficos. A densidade estimada pelo método do HMMDM (metade da média das máximas distâncias percorridas) resultou em 0,04 jaguatiricas por km2. As áreas de vida mínimas foram obtidas pelo método do mínimo polígono convexo e corroboraram com outros estudos quando se analisaram os registros dos indivíduos machos. Os registros para as áreas de vida das fêmeas foram menores do que as previamente reportadas. O padrão de atividade noturno está provavelmente relacionado com a atividade das presas, já que as jaguatiricas tendem a ajustar os padrões de movimento com a probabilidade de encontro com as mesmas, ou até mesmo com um fator evolutivo, objetivando evitar a competição/predação com felinos de maior porte. A baixa densidade observada pode ser consequência das condições da área de estudo, pequena e isolada, o que indica a necessidade por reservas maiores e por mecanismos visando conectar populações isoladas. Palavras-chave: armadilhas fotográficas, Felidae, individualização, padrões de manchas, padrões de atividade

    ATLANTIC-CAMTRAPS: a dataset of medium and large terrestrial mammal communities in the Atlantic Forest of South America

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    Our understanding of mammal ecology has always been hindered by the difficulties of observing species in closed tropical forests. Camera trapping has become a major advance for monitoring terrestrial mammals in biodiversity rich ecosystems. Here we compiled one of the largest datasets of inventories of terrestrial mammal communities for the Neotropical region based on camera trapping studies. The dataset comprises 170 surveys of medium to large terrestrial mammals using camera traps conducted in 144 areas by 74 studies, covering six vegetation types of tropical and subtropical Atlantic Forest of South America (Brazil and Argentina), and present data on species composition and richness. The complete dataset comprises 53,438 independent records of 83 species of mammals, includes 10 species of marsupials, 15 rodents, 20 carnivores, eight ungulates and six armadillos. Species richness averaged 13 species (±6.07 SD) per site. Only six species occurred in more than 50% of the sites: the domestic dog Canis familiaris, crab-eating fox Cerdocyon thous, tayra Eira barbara, south American coati Nasua nasua, crab-eating raccoon Procyon cancrivorus and the nine-banded armadillo Dasypus novemcinctus. The information contained in this dataset can be used to understand macroecological patterns of biodiversity, community, and population structure, but also to evaluate the ecological consequences of fragmentation, defaunation, and trophic interactions. © 2017 by the Ecological Society of Americ

    Contribution to the knowledge of Phrynops hilarii (Duméril & Bibron, 1835) (Testudines, Chelidae) in the restinga area of Santa Catarina State, Southern Brazil

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    Ecology studies on Phrynops hilarii in their natural habitat are rare, and they are nonexistent in Santa Catarina State. This species was studied in the restinga of the Serra do Tabuleiro State Park from July 2004 to December 2005. Five examples of oviposition were registered, and also eggs predation by Tupinambis merianae. Thirteen adult specimens were measured. In general, the results corroborate and/or add to existing knowledge of P. hilarii biology, especially in relation to areas of restinga

    Occupation of nesting boxes by small-sized vertebrates in an area of the Atlantic Forest in southern Brazil, and their viability of use

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    Several animals of the Atlantic Forest depend on natural cavities for reproduction, shelter or feeding. Some aspects of their ecology can be examined with the use of nesting boxes. This study was developed with 48 nesting boxes confectioned with “Tetra Pak” package. Four areas of the Atlantic Forest of southern Brazil, in four different successional stages, were sampled from August 2001 to August 2003. We aimed to verify: 1) the occupation of nesting boxes by small vertebrates, 2) the preference of the species for nesting boxes fixed at 2 or 4 m above the ground and for the position of the entrance hole (frontal or lateral), and 3) the viability of use of these nesting boxes in field research. Four species were found in the boxes: a tree frog (Hyla sp., one occupation), a green lizard (Enyalius iheringi, one occupation), the saffron finch (Sicalis flaveola, twenty-three occupations), and the wooly tailed mouse opossum (Micoureus paraguayanus, five occupations). Most occupations occurred in areas of early successional stages. There were no preferences for the height and position of the entrance hole. The nesting boxes proved to be relatively durable and useful in field research on small cavity-dependent vertebrates

    Avaliação do risco de extinção do gato-maracajá Leopardus wiedii (Schinz, 1821) no Brasil

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    Leopardus wiedii possui uma distribuição ampla no Brasil, com exceção do Ceará e sul do Rio Grande do Sul. Apesar disso, o tamanho populacional efetivo calculado é de cerca de 4.700 indivíduos no território brasileiro. Estima-se que nos próximos 15 anos (três gerações) deva ocorrer um declínio de pelo menos 10% desta população, principalmente pela perda e fragmentação de habitat relacionadas à expansão agrícola. Há conectividade com as populações dos países vizinhos, mas não existem informações sobre a dinâmica fonte-sumidouro. Portanto, a espécie foi categorizada como Vulnerável (VU) pelo critério C1

    Mastofauna terrestre do Parque Estadual da Serra do Tabuleiro, Estado de Santa Catarina, sul do Brasil

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    http://dx.doi.org/10.5007/2175-7925.2011v24n3p73O Parque Estadual da Serra do Tabuleiro, situado no centro-leste do Estado de Santa Catarina, sul do Brasil, possui 85.000ha e abrange grande diversidade de ambientes (floresta ombrófila densa, incluindo manguezais e restingas, floresta ombrófila mista e estepe ombrófila). De 1991 a 2010 foram realizados 22 estudos sobre sua mastofauna, abrangendo os métodos de captura com armadilhas de arame, armadilhas de interceptação e queda, caixas de nidificação, redes-de-neblina, armadilhas fotográficas, observação direta e vestígios. Foram registradas 75 espécies autóctones (cerca de 54% das espécies de mamíferos terrestres confirmados para Santa Catarina) pertencentes a 8 ordens e 25 famílias. Quinze espécies são ameaçadas em nível estadual, nacional ou mundial. A possibilidade de ocorrência de outras espécies e aspectos gerais da conservação dos mamíferos no Parque são discutidos
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