Anurans at Rio das Pedras Reserve, Mangaratiba, RJ, Brazil

Abstract

A study of anuran fauna composition was made in an Atlantic Rainforest pocket, at the south of Rio de Janeiro State, municipality of Mangaratiba, from May 1997 to September 2006. Field work was carried out monthly during the first five years and for the next five years every two months, totalizing 82 field trips. Visits had a mean duration of two nights, with a group of four people. Visual and audio active searches were performed. Forty-one species, in twenty-one genera distributed in nine families, were accounted for: Amphignathodontidae (three), Brachycephalidae (six), Bufonidae (two), Centrolenidae (one), Cyclorhamphidae (two), Hylidae (21), Hylodidae (two), Leptodactylidae (three) and Microhylidae (one). The species were related to the many reproductive micro-habitats found at the Rio das Pedras Reserve. The geographical distribution and altitudinal variation of Gastrotheca albolineata were extended. The altitudinal variation of Proceratophrys appendiculata and Bokermannohyla circumdata were also extended. Scinax angrensis and Aplastodiscus eugenioi were included in the list of species from Rio de Janeiro State. The anuran fauna from Rio das Pedras Reserve represents 25% of all of Anuran species found in Rio de Janeiro State, including one species " Endangered" - EN and one " Near Threatened" - NT and another species with restricted distribution. The number of species was considered expressive when compared with other Atlantic Rainforest area of São Paulo State.