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Surface behavior of pelagic juvenile loggerhead sea turtles in the eastern North Atlantic

2019Journal article Open access
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dc.contributor.authorFreitas, Carla
dc.contributor.authorCaldeira, Rui
dc.contributor.authorDellinger, Thomas
dc.date.accessioned2021-05-10T10:41:05Z
dc.date.available2021-05-10T10:41:05Z
dc.date.issued2019
dc.description.abstractSea turtles bask at the ocean surface, but little is known about the patterns and ecological context of surface behavior in the wild. This study investigated the surface behavior of ten juvenile loggerhead sea turtles (34 - 58 cm straight carapace length) satellite tagged in Madeira, in the pelagic eastern North Atlantic. During a total of 2273 tracking days, turtles moved through oceanic areas with a mean depth of ~3400 m. On average, turtles spent one third of the time at the surface (0 - 1 m depth), spending 43% of the time at the surface during the day and 29% of the time during the night. Generalized linear mixed modelling showed that the proportion of time at the surface was significantly larger during the day, particularly during spring and summer. Time spent at the surface during the day increased with elevated air temperatures and weak winds, probably to maximize the benefits of solar absorption. Conversely, the probability of being at the surface during the day decreased as horizontal search effort increased, suggesting a trade-off between basking and daytime foraging activities. At night, time spent at the surface was not associated with air temperature or wind speed but was instead positively associated with moon illumination. As turtles tend to dive deeper during clear nights, increased surface time may be needed to recover from deeper dives. This study presents important aspects of the behavioral ecology of the species during the oceanic juvenile phase. The findings reported here may be relevant for species management and conservation, including correction of census data and management of interactions with surface fishing gear and other anthropogenic activities.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFreitas, C., Caldeira, R., & Dellinger, T. (2019). Surface behavior of pelagic juvenile loggerhead sea turtles in the eastern North Atlantic. Journal of experimental marine biology and ecology, 510, 73-80.pt_PT
dc.identifier.doi10.1016/j.jembe.2018.10.006pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.13/3380
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectArgospt_PT
dc.subjectBiologgingpt_PT
dc.subjectBaskingpt_PT
dc.subjectCaretta carettapt_PT
dc.subjectFirst passage timept_PT
dc.subjectSatellite telemetrypt_PT
dc.subject.pt_PT
dc.subjectFaculdade de Ciências da Vidapt_PT
dc.titleSurface behavior of pelagic juvenile loggerhead sea turtles in the eastern North Atlanticpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage80pt_PT
oaire.citation.startPage73pt_PT
oaire.citation.titleJournal of Experimental Marine Biology and Ecologypt_PT
oaire.citation.volume510pt_PT
person.familyNameCaldeira
person.familyNameDellinger
person.givenNameRui
person.givenNameThomas
person.identifier278940
person.identifier.ciencia-id7917-3AB5-8D9C
person.identifier.ciencia-idD21E-BADC-7807
person.identifier.orcid0000-0001-8805-3016
person.identifier.orcid0000-0002-2424-8620
person.identifier.ridJ-9829-2013
person.identifier.scopus-author-id7003731164
person.identifier.scopus-author-id7003679889
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication62abb399-1b3a-4b8c-9920-8721fe616290
relation.isAuthorOfPublication3bf4a068-5b47-46f6-becb-79eabbb56f11
relation.isAuthorOfPublication.latestForDiscovery3bf4a068-5b47-46f6-becb-79eabbb56f11

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