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Patterns of second‐to‐fourth digit length ratios (2D:4D) in two species of frogs and two species of lizards at La Selva, Costa Rica

dc.creatorDiRenzo, Graziella Vittoria
dc.creatorStynoski, Jennifer Lynn
dc.date.accessioned2019-05-08T15:46:25Z
dc.date.available2019-05-08T15:46:25Z
dc.date.issued2012
dc.description.abstractIt is now well documented that androgen and estrogen signaling dur- ing early development cause a sexual dimorphism in second-to-fourth digit length ratio (2D:4D). It is also well documented that males of mam- malian species have a smaller 2D:4D than females. Although there are discrepancies among 2D:4D studies in birds, the consensus is that birds exhibit the opposite pattern with males having a larger 2D:4D than females. The literature currently lacks substantial information regarding the phylogenetic pattern of this trait in amphibians and reptiles. In this study, we examined 2D:4D in two species of frogs (Oophaga pumilio and Craugastor bransfordii) and two species of lizards (Anolis humilis and Anolis limifrons) to determine the existence and the pattern of the sexual dimorphism. Male O. pumilio and C. bransfordii displayed larger 2D:4D than females in at least one of their two forelimbs. Male A. humilis had larger 2D:4D than females in both hindlimbs, but smaller 2D:4D than females in both forelimbs. Male A. limifrons may also have smaller 2D:4D than females in the right forelimb. Finally, digit ratios were some- times positively related to body length, suggesting allometric growth. Overall, our results support the existence of the 2D:4D sexual dimor- phism in amphibians and lizards and add to the knowledge of 2D:4D trait patterning among tetrapods.es_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Biologíaes_ES
dc.identifier.citationhttps://onlinelibrary.wiley.com/doi/full/10.1002/ar.22411
dc.identifier.doi10.1002/ar.22411
dc.identifier.issn1932-8494
dc.identifier.urihttps://hdl.handle.net/10669/76947
dc.language.isoen_USes_ES
dc.rightsacceso embargado
dc.sourceThe Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology, vol.295(4), pp.597-603es_ES
dc.subjectDigit ratio (2D:4D)es_ES
dc.subjectTestosteronees_ES
dc.subjectAndrogenses_ES
dc.subjectSexual dimorphismes_ES
dc.subjectAmphibiaes_ES
dc.subjectReptilianes_ES
dc.titlePatterns of second‐to‐fourth digit length ratios (2D:4D) in two species of frogs and two species of lizards at La Selva, Costa Ricaes_ES
dc.typeartículo original

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