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Sex ratios of loggerhead sea turtles Caretta caretta during the juvenile pelagic stage

2010Journal article Open access
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dc.contributor.authorDelgado, Cláudia
dc.contributor.authorCanário, Adelino V. M.
dc.contributor.authorDellinger, Thomas
dc.date.accessioned2021-05-12T09:32:30Z
dc.date.available2021-05-12T09:32:30Z
dc.date.issued2010
dc.description.abstractSex ratios are a fundamental trait for species reproduction. In species with temperature-dependent sex determination (TSD), sex ratios are not necessarily even, which has important demographic consequences. We examined the sex ratio of juvenile pelagic stage loggerhead turtles Caretta caretta offshore Madeira Island, North Eastern Atlantic, using laparoscopy and histology. The overall sex ratio was 2:1 (F:M), significantly different from an even sex ratio. Although there was no apparent temporal variation, sex ratios among size classes were significantly different. The sex ratio of juveniles was compared with known sex ratios for the putative source rookery and found to be similar to the subadults’ sex ratio, but significantly less female-biased than the hatchlings sex ratio. This sug gests overestimation of hatchlings sex ratios and/or, less likely, differential mortality of females during the first months of life. Alternatively, the Madeira Island aggrega tion may be recruiting males from other geographical sources such as the Mediterranean and the Cape Verde.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationDelgado, C., Canário, A. V., & Dellinger, T. (2010). Sex ratios of loggerhead sea turtles Caretta caretta during the juvenile pelagic stage. Marine Biology, 157(5), 979-990.pt_PT
dc.identifier.doi10.1007/s00227-009-1378-8pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3387
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherSpringerpt_PT
dc.relationTrophic ecology and population structure of juvenile pelagic stage loggerhead sea turtles Caretta caretta in the North Atlantic Ocean
dc.relationDESENVOLVIMENTO DA GÓNADA E NÍVEIS HORMONAIS EM TARTARUGAS-BOBA, CARETTA CARETA, NO ATLÂNTICO NORDESTE NE
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectLoggerhead sea turtles Caretta carettapt_PT
dc.subjectCaretta carettapt_PT
dc.subjectSex ratiospt_PT
dc.subjectJuvenile pelagic stagept_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleSex ratios of loggerhead sea turtles Caretta caretta during the juvenile pelagic stagept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTrophic ecology and population structure of juvenile pelagic stage loggerhead sea turtles Caretta caretta in the North Atlantic Ocean
oaire.awardTitleDESENVOLVIMENTO DA GÓNADA E NÍVEIS HORMONAIS EM TARTARUGAS-BOBA, CARETTA CARETA, NO ATLÂNTICO NORDESTE NE
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/POCI/POCTI%2FBIA%2F11310%2F2001/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F8413%2F2002/PT
oaire.citation.endPage990pt_PT
oaire.citation.issue5pt_PT
oaire.citation.startPage979pt_PT
oaire.citation.titleMarine Biologypt_PT
oaire.citation.volume157pt_PT
oaire.fundingStreamPOCI
person.familyNameDellinger
person.givenNameThomas
person.identifier.ciencia-idD21E-BADC-7807
person.identifier.orcid0000-0002-2424-8620
person.identifier.scopus-author-id7003679889
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication.latestForDiscovery3bf4a068-5b47-46f6-becb-79eabbb56f11
relation.isProjectOfPublication972ed3f0-0881-4e1a-8b7b-6fe18b0ce185
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