Reproductive biology of Philodryas patagoniensis (Snakes: Dipsadidae) in south Brazil: female reproductive cycle

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dc.contributorLaboratório de Ecologia e Evoluçãopt_BR
dc.contributor.authorLoebens, Luizapt_BR
dc.contributor.authorRojas, Claudio Augustopt_BR
dc.contributor.authorAlmeida-Santos, Selma Mariapt_BR
dc.contributor.authorCechin, Sonia Zaninipt_BR
dc.identifier.citationLoebens L, Rojas CA, Almeida-Santos SM, Cechin SZ. Reproductive biology of Philodryas patagoniensis (Snakes: Dipsadidae) in south Brazil: female reproductive cycle. Acta Zool.. 2018 Apr;99(2):105-14. doi:10.1111/azo.12200.pt_BR
dc.description.abstractIn this study, we describe the female reproductive cycle of Philodryas patagoniensis in south Brazil, which was described through morpho-anatomical and histological analyses. The peak of secondary vitellogenesis occurred during winter-spring (July-December), ovulation in spring (October-December), mating and fertilization in spring-summer (October-February), oviposition in spring-autumn (October-May) and births from late spring to autumn (December-July). The diameter of vitellogenic follicles/eggs was larger in winter-spring than in other seasons. The diameter of the shell glands was also larger in winter-spring. In spite of the clear reproductive peak, gonads only showed reduced activity in the autumn. Therefore, at the individual level, females have a discontinuous cyclical reproduction; in the populational level, the reproductive cycle is seasonal semisynchronous. We support the hypothesis that P.patagoniensis have the ability to produce multiple clutches with long-term stored sperm. Sexual dimorphism in body size was evident, and females are significantly larger and heavier than males. Larger females were able to produce follicles and eggs in larger amount and size. The maternal body size was positively related to the reproductive effort and fecundity. To conclude, we deliberated about the proximal and distal causes that influence the reproductive traits and patterns of P.patagoniensis.pt_BR
dc.description.sponsorship(CNPq) Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.format.extentp. 105-114pt_BR
dc.relation.ispartofActa Zoologicapt_BR
dc.titleReproductive biology of Philodryas patagoniensis (Snakes: Dipsadidae) in south Brazil: female reproductive cyclept_BR
dc.contributor.external(UFSM) Universidade Federal de Santa Mariapt_BR
dc.subject.keywordsexual segment of the kid-neypt_BR
dc.subject.keywordductus deferenspt_BR
dc.subject.keywordsperm storagept_BR
dc.relation.ispartofabbreviatedActa Zoolpt_BR
dc.identifier.citationabntv. 99, n. 2, p. 105-114, abr. 2018pt_BR
dc.identifier.citationvancouver2018 Apr;99(2):105-14pt_BR
dc.contributor.butantanRojas, Claudio Augusto|:Aluno|:Laboratório de Ecologia e Evolução|:pt_BR
dc.contributor.butantanAlmeida-Santos, Selma Maria|:Pesquisador|:Laboratório de Ecologia e Evolução|:pt_BR
dc.sponsorship.butantanConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)¦¦311532/2015-2pt_BR
dc.sponsorship.butantanConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)¦¦304929/2012-3pt_BR
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