Anuros da Reserva Rio das Pedras, Mangaratiba, RJ, Brasil

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 microhabitats 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. Keywords: amphibians, Atlantic Rainforest, conservation status, geographical distribution, inventory.Carvalho-e-Silva, A. M. T.; Silva, G. R.; Carvalho-e-Silva, S. P. Anuros da Reserva Rio das Pedras, Mangaratiba, RJ, Brasil. Biota Neotrop., vol. 8, no. 1, jan./mar. 2008. Disponível em: <http://www.biotaneotropica.org.br/ v8n1/pt/abstract?inventory+bn02608012008>.Resumo: Um estudo de composição de fauna foi realizado em um reduto de Mata Atlântica na região sul Fluminense, município de Mangaratiba, RJ, no período de maio de 1997 a setembro de 2006. As coletas foram feitas mensalmente nos cinco primeiros anos e bimensalmente nos outros cinco anos, totalizando 82 excursões. As visitas tiveram duração média de duas noites, com uma equipe de quatro pessoas, utilizando a metodologia de busca ativa visual e auditiva. Ao todo foram registradas para a região quarenta e uma espécies de vinte e um gêneros, distribuídos em nove famílias: Amphignathodontidae (três), Brachycephalidae (seis), Bufonidae (dois), Centrolenidae (um), Cyclorhamphidae (dois), Hylidae (21), Hylodidae (dois), Leptodactylidae (três) e Microhylidae (um). As espécies foram relacionadas aos diversos micro-ambientes de reprodução encontrados na Reserva Rio das Pedras (ReRP) e foram feitas considerações sobre seu estado de conservação. A distribuição geográfica e a variação altitudinal de Gastrotheca albolineata foram ampliadas. Proceratophrys appendiculata e Bokermannohyla circumdata tiveram também sua variação altitudinal ampliada. Scinax angrensis e Aplastodiscus eugenioi foram incluídas...

Frogs of Marambaia: a naturally isolated Restinga and Atlantic Forest remnant of southeastern Brazil

“…We may have missed a few species that are either cryptic, habitat specialists of resctricted local occurrence, or that are only active during a short period of time when special climatic conditions are observed. Among these we suspect that Brachycephalus didactylus (Izecksohn 1971 (Carvalho-e-Silva et al 2008, and unpublished data) and on some of the neighboring larger islands (Ilha Grande, Rocha et al 2001), may indicate the possibility that the reduction of area and loss of habitats from for reproduction due to the process of insulation are important factors that are contributed to amphibian extinctions in the area.…”

“…The species discovery curve indicates a low probability of finding additional species with increasing tories, describing the anurofauna of municipalities are scant. For the continental region near Marambaia, a list of amphibian communities has been published recently (Carvalho-e-Silva et al 2008), being our only source for comparison with the continental fauna. Data is also available for a larger, nearby Island, Ilha Grande ( Figure 1) and has been made available through publication of partial lists (Rocha et al 2001) and personal communication (C.F.D.…”

“…**Data from the collection housed in Museu Nacional (MNRJ). Data on reproduction was compiled from field observations and from Izecksohn & Carvalho-e-Silva (2001) e Carvalho-e-Silva et al (2008. Tabela 1.…”

“…4, Out./Dez. 2008 The majority of the frogs present in the lowlands are species commonly found in this habitat elsewhere in the State of Rio de Janeiro (Izecksohn & Carvalho-e-Silva 2001), also use restinga or hillside forest, and have their reproductive behavior associated with the mouths of rivers and creeks, flooded areas, or temporary ponds (Carvalho-e-Silva et al 2008). In this category we have species including Rhinella ornata, Dendropsophus cf.…”

“…x-signatus, and Leptodactylus ocellatus. Therefore, although lowland areas have just one exclusive species, many depend on particular microhabitats present there for reproduction (Izecksohn & Carvalho-e-Silva 2001, Carvalho-e-Silva et al 2008.…”