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Warmer incubation temperature influences sea turtle survival and nullifies the benefit of a female-biased sex ratio

2020-11Journal article Restricted
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dc.contributor.authorMartins, Samir
dc.contributor.authorSilva, Elton
dc.contributor.authorAbella, Elena
dc.contributor.authorLoureiro, Nuno de Santos
dc.contributor.authorMarco, Adolfo
dc.date.accessioned2021-06-18T16:25:46Z
dc.date.available2021-06-18T16:25:46Z
dc.date.issued2020-11
dc.description.abstractClimate change plays a key role in the development and survival of oviparous ectotherms such as sea turtles. Higher environmental temperatures are expected to lead to increased production of female hatchlings and potential feminization of many populations, as well as reduced hatching success and hatchling fitness. We investigated how different sand temperatures affect sea turtle embryo mortality, hatchling phenotype, and hatchling predation during their crawl to the sea. the study was conducted in Cabo Verde, the only rookery of the endangered loggerhead turtle (Caretta caretta) in the Eastern Atlantic. During three consecutive seasons (2015-2017), 240 loggerhead clutches were exposed to three different incubation temperature regimes created by different sand colours. the warm treatment (mean = 32.3 degrees C +/- 0.5) killed 33% more embryos than the cold treatment (mean = 29.7 degrees C +/- 0.6). Hatchlings from the warm treatment were mostly females, smaller in size, and had lower performance. Hatchling predation by ghost crabs during seaward transit was higher for hatchlings incubated in the warm treatment. Combining embryo mortality and hatchling predation, the rate of female hatchling arrival at the sea was more than twice as high in the cold treatment (34.4 females per 100 eggs) than in the warm treatment (16.0 females per 100 eggs). This increase in mortality caused by warmer incubation temperatures may cancel any potential benefit of a female-biased sex ratio. Conservation planners should consider behavioural adaptations and the potential dispersal of the nesting areas to colder areas to increase resilience of loggerhead turtles to climate change.
dc.description.sponsorshipMAVA Foundation [AO1 (17105)]
dc.description.sponsorshipMarine Turtle Conservation Found (MTCF, USA) [F161AP00318]
dc.description.versioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1007/s10584-020-02933-w
dc.identifier.issn0165-0009
dc.identifier.urihttp://hdl.handle.net/10400.1/15668
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer
dc.subjectTemperature
dc.subjectIncubation
dc.subjectHatching success
dc.subjectMarine turtles
dc.subjectClimate change
dc.subject.otherEnvironmental Sciences & Ecology
dc.subject.otherMeteorology & Atmospheric Sciences
dc.titleWarmer incubation temperature influences sea turtle survival and nullifies the benefit of a female-biased sex ratio
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage704
oaire.citation.issue2
oaire.citation.startPage689
oaire.citation.titleClimatic Change
oaire.citation.volume163
person.familyNameMartins
person.familyNameFigueiredo de Santos Loureiro
person.givenNameSamir
person.givenNameNuno Manuel de
person.identifier.ciencia-idD514-3F01-6DE0
person.identifier.orcid0000-0003-3156-9630
person.identifier.orcid0000-0001-7018-7630
person.identifier.scopus-author-id56423263000
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication0186e5b6-731a-4c48-b611-e03753374928
relation.isAuthorOfPublicationa281c547-4ec4-4512-ba80-350af27857cf
relation.isAuthorOfPublication.latestForDiscovery0186e5b6-731a-4c48-b611-e03753374928

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