RAN
URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1401
Centro Nacional de Pesquisa e Conservação de Répteis e Anfíbios
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2 resultados
Resultados da Pesquisa
Item Extinction risk evaluation and population size estimation of Bothrops insularis (Serpentes: Viperidae), a critically endangered insular pitviper species of Brazil.(South American Journal of Herpetology, 2021) Abrahão, Carlos Roberto; Amorim, Ligia Grazzielli; Magalhães, Adriana Melo; Azevedo, Carlos Renato; Grisi-Filho, José Henrique Hildebrand; Dias, Ricardo AugustoThe golden lancehead pitviper (Bothrops insularis) is a critically endangered species endemic to the Queimada Grande Island, a federally protected area located 33 km off the southern coast of São Paulo State, Brazil. Adults have specialized diet, preying upon migrating birds, and the species' reproductive efficiency is quite lower than its continental related species, B. jararaca. Potential threats to B. insularis include illegal removal, introduction of exotic species or diseases, and catastrophic events such as wildfire. The population size of B. insularis was estimated at 2,899 individuals (CI 95% = 1,903; 4,416) in its forested habitat using distance sampling. This is the first population estimation using 3D area model for a reptile habitat. Bothrops insularis was more sensitive to harvesting of few individuals yearly than a catastrophic event that causes mortality over 95% of the entire population in a 100-year simulation period. Prioritizing conservation efforts of reptile species in Brazil depends on simple yet robust monitoring methods like the one presented here. This study was only made possible through the concatenation of government, management, and scientific interests. Such synergism should be encouraged in conservation policies in Brazil, especially in remote locations.Item Redescription and Geographical Distribution of a Rare Microteiid Lizard: Rhachisaurus brachylepis (Dixon, 1974) (Squamata: Gymnophthalmidae).(South American Journal of Herpetology, 2020-03-30)Rhachisaurus brachylepis is a poorly known lizard species that was described from Serra do Cipó in the southern portion of the Serra do Espinhaço (Espinhaço Mountain Range), Minas Gerais, Brazil. Almost 50 years after its original description, the species remains known from only a few specimens and brief comments in the literature. Here, we present new data on morphological variation (meristics, morphometrics, and color pattern) within the species on the basis of the reexamination of old specimens housed in herpetological collections and recently collected material. We also provide an emended diagnosis, as well as diagnostic characters relative to other genera of Brazilian gymnophthalmids. We provide additional information on the species’ geographical distribution and an updated distribution map, extending its range and filling in some gaps. We also establish the precise placement of the type locality. The new records of R. brachylepis indicate that the size of its geographical distribution is greater than previously thought. Further, we discuss the controversial record of the species from northern Brazil.