Seleção de hábitat em duas espécies de jararaca (Bothrops moojeni Hoge e B. neuwiedi Wagler) (Serpentes, Viperidae)

Abstract

Habitat selection by two lancehead species (Bothrops moojeniHoge and B. neuwiedi Wagler) (Serpentes, Viperidae)Our data regarding the use of the habitat by Bothrops moojeni and B. neuwiedi (Serpentes, Viperidae) was obtained from information related to specimens donated to the Jardim Zoológico de Brasília, Universidade de Brasília, Jardim Botânico do Distrito Federal, and also from a half-captivity experiment. The results show a strong segregation of habitat between both species, with B. neuwiedi largely restricted to open areas, and B. moojeni using mainly the forest and ecotones. There is no significant difference in habitat selection between the individuals maintained isolated and those confined to the same yard. Therefore, one species aparently does not interfere directly in the habitat selection of the other.Key words: Serpentes, Viperidae, Bothrops, Lancehead, habitat selection, cerrado, half-captivity. RESUMOForam utilizados dados relativos ao uso de hábitat por espécimes de Bothrops moojeni e B. neuwiedi (Serpentes, Viperidae) provenientes de doações ao Jardim Zoológico de Brasília, Universidade de Brasília, Jardim Botânico do Distrito Federal e de um experimento de semicativeiro. Os resultados indicaram forte segregação de hábitat entre ambas as espécies, sendo B. neuwiedi amplamente restrita a áreas abertas, enquanto B. moojeni utiliza principalmente a mata e o ecótono. Não foi encontrada diferença significativa na seleção de hábitat entre indivíduos mantidos isolados e aqueles confinados em um mesmo cercado. Assim, aparentemente, uma espécie não interfere diretamente na seleção de hábitat da outra.

Natural History of the South American Water Snake Helicops leopardinus (Colubridae: Hydropsini) in the Pantanal, Central Brazil

“…In South America, with the exception of a few studies (e.g., Duellman, 1978;Borges and Araú jo, 1998;Marques and Puorto, 1998), little is known about the biology of snakes (Vitt, 1980). This is especially true of aquatic species, which generally are more restricted to tropical climates (Greene, 1997).…”

In vitro comparison of enzymatic effects among Brazilian Bothrops spp. venoms

“…moojeni is commonly found in central and southeastern Brazil, being most prolific in the savanna('Cerrado') (Borges and Araujo, 1998;FUNASA, 2001). Studies have revealed that B. moojeni venom exhibits high proteolytic activity and low hemorrhagic action, with high PLA 2 levels and coagulant properties (Assakura et al, 1985).…”

Microhabitat use by species of the genera Bothrops and Crotalus (Viperidae) in semi-extensive captivity

“…All specimens have a microchip under their skin. To facilitate identification, the tail of each animal was painted with nail polish of a different color (6).…”

“…Although these techniques are more commonly used in the field, other methods are employed in semi-extensive breeding for individual identification (6). Semiextensive breeding can provide new information on snakes' habits such as segregation, habitat use, and thermoregulation (2,6,7).…”