Capacidade reprodutiva de Bothrops jararaca (Serpentes, Viperidae)

Abstract

ABSTRACT. Reproductive capacity of Bothrops jararaca (Serpentes, Viperidae). The relationship between female body size and egg number was examined in the snake Bothrops jararaca (Wied, 1924). Some authors have demonstrated that the estimated clutch size may be affected by the inclusion or exclusion of dead neonates or nondeveloped eggs. The reproductive system of 254 mature females newly arrived from nature was examined and 29.55% (n=75) had eggs in the oviducts in different stages of embryonic development. The presence of atresic eggs was observed in 34.5% of those females. A significant difference was observed in the number of eggs in the right and left oviducts (t=9.48, P<0.001), but not in the number of atresic eggs (t=1.110, P=0.278). The correlation of female body size and egg number was greater when all, the normal and atresic eggs were considered (r=0.63, P<0.001). The exclusion of atresic eggs from the clutch size decreased slightly this correlation (r=0.54, P<0.001).

Ejaculate characteristics over seasons in five species of lancehead pitvipers (Bothrops spp) kept in captivity

“…Later on, sperm movement improved through summer‐spring, and started decreasing in the winter. This sharp decline in seminal characteristics during spring may be explained by the ovulation period in females, when no copulations are recorded (Janeiro‐Cinquini et al, 1993; Janeiro‐Cinquini, 2004). As previously documented in several birds and mammals, seasonal breeders may present an increase in sperm abnormalities over periods of testicular regression or recrudescence.…”

REPRODUCCIÓN DE LA SERPIENTE TEPOXO, Atropoides nummifer (SERPENTES: VIPERIDAE), EN CAUTIVERIO.

“…Los aspectos reproductivos de especies de la familia Viperidae, tanto en cautiverio como vida silvestre, han sido de gran interés (p. ej. Goldberg y Rosen, 2000;Janeiro-Cinquini, 2004;Jandzik, 2007;Silva et al, 2013;Corrales et al, 2016). Particularmente, en el caso del género Atropoides la investigación se ha enfocado en Atropoides mexicanus, Atropoides olmec y Atropoides picadoi (p. ej.…”

>b<Monitoramento e estudos moleculares de ovos atrésicos de serpentes do gênero >i<Bothrops>/i<>/b<

“…Rotineiramente em Squamatas é reportado o depósito, na natureza, de ovos inférteis e anormais tanto em espécies ovíparas (FITCH, 1970;MURPHY et al, 1978) quanto vivíparas (BRANCH, 1973;RONNE 1996;GREGORY et al, 1992;MARQUES et al, 2002a;BLACKBURN et al, 1998;2003;JANEIRO-CINQUINI, 2004;ALVES et al, 2014).…”

“…Ovos inférteis ou mal formados podem ser expelidos pelo oviduto e liberados (expulsos) pela cloaca de Squamatas, sendo frequentemente reportados tanto em espécies de ovíparos (FITCH, 1970;MURPHY et al, 1978) quanto vivíparos (BRANCH, 1973;RONNE 1996;GREGORY et al, 1992;MARQUES et al, 2002;BLACKBURN et al, 1998;2003;JANEIRO-CINQUINI, 2004;ALVES et al, 2014).…”