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 Notes on the conservation status, geographic distribution and ecology of Bothrops muriciensis Ferrarezzi & Freire, 2001 (Serpentes, Viperidae).(North-Western Journal of Zoology, 2012) FREITAS, Marco Antonio de; FRANÇA, Daniella Pereira Fagundes de; GRABOSKI, Roberta; UHLIG, Vivian; VERÍSSIMO, DiogoThe Atlantic forest of Brazil is one of the most biodiverse regions in the world. However, in the last centuries this biome has suffered unparalled fragmentation and degradation of its forest cover, with only 8% of its original area remaining. The region of Murici, in the state of Alagoas, Brazil, houses some of the largest forest fragments of Atlentic forest and is of one of the regions within the biome with more threatened and endemic taxa. One of this is Bothrops muriciensis, a snake species previously only known from the three records used to describe it. We present six new records for Bothrops muriciensis along with additional information and inferences on the species geographic distribution and natural history. Lastly we use the new information to assess the species according to the IUCN Redlist criteria and suggest that the species should be placed in the Critically Endangered category under criteria IUCN Redlist criteria B2ab(iii). The effective management of this species will require further data on its ecology, geographic distribution and population dynamics but its survival will more likely depend on an effective protection of the Murici Ecological Station, the only locality where Bothrops muriciensis has so far been recorded.Item Habitat selection by Bothrops atrox (Serpentes: Viperidae) in central Amazonia, Brazil.(Bioone, 2019-03-28) de Fraga, Rafael; Magnusson, William E.; Abrahão, Carlos R.; Sanaiotti, Tania; Lima, Albertina P.Tropical rainforests often appear relatively homogeneous on satellite images, but responses to landscape characteristics may be found on finer scales if habitat characteristics are considered as continuous variables. In this study, we used 30 uniformly distributed plots and 16 plots beside streams to evaluate the effects of distance from stream, litter depth, altitude, slope, and tree density on abundance of Amazonian Lancehead Pitviper (Bothrops atrox). We estimated densities and probabilities of detection of snakes in riparian and upland plots in Reserva Ducke, Manaus, Amazonas,Brazil. Apparent density of individuals of B. atrox was about 6.4 times higher near streams, but the number of individuals in the landscape more than 10 m away from streams was about 3.9 times higher than the number of individuals within 10 m of streams. Movement data from two adult B. atrox evaluated by radio telemetry indicate that individuals can disperse out of plots and away from streams over a period of several months. Detectability of B. atrox varied little among riparian and upland plots, so differences in detectability are unlikely to be responsible for large differences in encounter rates of snakes between riparian and non-riparian areas. There were small differences in body size of individuals near streams and individuals far from streams. The distribution of B. atrox is not uniform within the forest. However, as with most other tropical-forest organisms studied to date, this species occurs across wide environmental gradients and shows only subtle habitat specificity.