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Species composition and density estimates of the anurofauna of a site within the northernmost large Atlantic Forest remnant (Parque Estadual do Desengano) in the state of Rio de Janeiro, Brazil

2011; Fundação de Amparo à Pesquisa do Estado de SP; Volume: 11; Issue: 4 Linguagem: Inglês

10.1590/s1676-06032011000400014

ISSN

1678-7927

Autores

Carla da Costa Siqueira, Davor Vrcibradic, Mauricio Almeida‐Gomes, Vanderlaine Amaral de Menezes, Vitor Nelson Teixeira Borges-Júnior, Fábio Haruki Hatano, Jorge Antônio Lourenço Pontes, Pablo Goyannes-Araújo, Diego Medeiros Guedes, Monique Van Sluys, Carlos Frederico Duarte Rocha,

Tópico(s)

Animal and Plant Science Education

Resumo

We present data on species composition, relative abundance and estimated densities for leaf-litter anuran amphibians from an Atlantic Forest area within the Parque Estadual do Desengano, in the state of Rio de Janeiro, Brazil, based on results of a short-term survey carried out during the winter at altitudes of 1000-1500 m. Three sampling methods were used: plot sampling, visual encounter surveys (VES; performed during the day, at the twilight, and at night), and pitfall traps. We recorded 13 species, with the direct-developer Ischnocnema parva (Girard, 1853) being the most abundant. Most frogs (ca. 90% of all individuals) sampled by VES were captured during the crepuscular and nocturnal periods. The estimated density of the local leaf-litter frog assemblage based on plot sampling was 13.2 ind.100 m-2, which is one of the highest values currently reported for Atlantic Rainforest areas. This is the first study analyzing the anuran fauna of the Parque Estadual do Desengano and adds to the knowledge of the fauna of the northern region of the state of Rio de Janeiro, which is still poorly studied.

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