Reproductive biology of Bothrops atrox (Serpentes, Viperidae, Crotalinae) from the brazilian Amazon

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dc.contributorLaboratório de Ecologia e Evoluçãopt_BR
dc.contributor.authorSilva, Karina Maria Pereira dapt_BR
dc.contributor.authorSilva, Kalena Barros dapt_BR
dc.contributor.authorSueiro, Letícia Ruizpt_BR
dc.contributor.authorOliveira, Maria Ermelinda E.S.pt_BR
dc.contributor.authorAlmeida-Santos, Selma Mariapt_BR
dc.identifier.citationSilva KMP, Silva KB, Sueiro LR, Oliveira MEE.S., Almeida-Santos SM. Reproductive biology of Bothrops atrox (Serpentes, Viperidae, Crotalinae) from the brazilian Amazon. Herpetologica. 2019 Sep;75(3):198-207. doi:10.1655/D-18-00023.pt_BR
dc.description.abstractReproductive seasonality is common among snakes, with mating, pregnancy, and birth or oviposition occurring only during few months of the year and modulated mainly by two environmental phenomena—temperature and rainfall. Species of Bothrops inhabit regions with varied climatic conditions, including those that are tropical, subtropical, equatorial, and semiarid. Bothrops atrox is an endemic and widespread species of the Amazon rain forest. Such habitat is characterized by an equatorial climate with little variability in temperature and humidity, but marked seasonality in intense precipitation. We investigated several aspects of the reproductive biology of B. atrox, including the reproductive cycle, the sexual segment of the kidney (SSK), sperm storage, and the possible influence of temperature and rainfall on pregnancy duration, birth, and spermatogenesis. Specifically, we examined museum specimens to describe sexual dimorphism, litter size, and male and female urogenital cycles through macroscopic and histological analyses. Females of B. atrox exhibited follicular recrudescence mainly from January to April (part of the wet season). Pregnant females were found throughout the year (except May), but births were found to occur mainly at the end of the dry season (August–October). Males exhibited SSK hypertrophy and sperm production in the wet season (November–April). Females were found to be larger than males, but males of B. atrox—as with other members of the B. atrox species complex—obtain relatively larger body sizes when compared with other species of Bothrops, which might be an adaptive response to male–male combat in this species. Together, our results show that B. atrox from Amazonia has a unique reproductive strategy (for each sex) among pit vipers, indicating greater reproductive plasticity when compared with its congeners.pt_BR
dc.description.sponsorship(CAPES) Coordenação de Aperfeiçoamento de Pessoal de Nível Superiorpt_BR
dc.rightsOpen accesspt_BR
dc.titleReproductive biology of Bothrops atrox (Serpentes, Viperidae, Crotalinae) from the brazilian Amazonpt_BR
dc.contributor.external(USP) Universidade de São Paulopt_BR
dc.contributor.external(UNG) Universidade Guarulhospt_BR
dc.contributor.external(UFAM) Universidade Federal do Amazonaspt_BR
dc.subject.keywordAmazonian Lanceheadspt_BR
dc.subject.keywordReproductive cyclespt_BR
dc.subject.keywordSexual segment of the kidneypt_BR
dc.subject.keywordsexual size dimorphismpt_BR
dc.identifier.citationabntv. 75, n. 3, p. 198-207, sep. 2019pt_BR
dc.identifier.citationvancouver2019 Sep;75(3):198-207pt_BR
dc.contributor.butantanSilva, Karina Maria Pereira da|:Aluno|:Laboratório de Ecologia e Evolução|:PrimeiroAutorpt_BR
dc.contributor.butantanSilva, Kalena Barros da|:Aluno|:Laboratório de Ecologia e Evolução|:pt_BR
dc.contributor.butantanSueiro, Letícia Ruiz|:Aluno|:Laboratório de Ecologia e Evolução|:pt_BR
dc.contributor.butantanAlmeida-Santos, Selma Maria|:Pesquisador|:Laboratório de Ecologia e Evolução|:pt_BR
dc.sponsorship.butantan(CAPES) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior¦¦pt_BR
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