Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate

The settlement of demersal animals is influenced both by physical processes ruling the distribution of pelagic juveniles in the open ocean and by their active selection of suitable benthic habitats. Green turtles Chelonia mydas inhabiting the coastal areas of the western South Atlantic Ocean derive...

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Detalhes bibliográficos
Autores: Campos, Patricia, Cardona Pascual, Luis
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/131847
Acesso em linha:https://hdl.handle.net/2445/131847
Access Level:acceso abierto
Palavra-chave:Tortugues marines
Atlàntic, Oceà
Sea turtles
Atlantic Ocean
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spelling Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rateCampos, PatriciaCardona Pascual, LuisTortugues marinesAtlàntic, OceàSea turtlesAtlantic OceanThe settlement of demersal animals is influenced both by physical processes ruling the distribution of pelagic juveniles in the open ocean and by their active selection of suitable benthic habitats. Green turtles Chelonia mydas inhabiting the coastal areas of the western South Atlantic Ocean derive primarily from the rookery at Ascension Island and settle over a huge area spanning from northern Brazil to Uruguay. Here, we analysed the stable C and N isotope ratios in 30 µm of carapace layers from juvenile green turtles collected from 2 distinct areas of Brazil (Praia do Forte, 12°38'S, 38°05'W, and Ubatuba, 23°26'S, 45°05'W), with the goal of reconstructing their individual diets and habitat use patterns. Juvenile neritic green turtles from Praia do Forte usually had herbivorous diets, with limited individual variability and few temporal changes in diet or habitat. Conversely, most juvenile green turtles from Ubatuba had omnivorous diets, although they exhibited high levels of individual and temporal variability. These contrasting patterns could be linked to less abundant and predictable food availability in subtropical Ubatuba compared to tropical Praia do Forte. It is unknown why large numbers of juvenile green turtles bypass foraging grounds in north-eastern Brazil to settle in subtropical or warm temperate areas, although it may be related to individual differences in growth rate and their size being too small when reaching Brazil from Ascension Island.Inter-Research2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/131847Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3354/meps12909Marine Ecology Progress Series, 2019, vol. 614, p. 173-182https://doi.org/10.3354/meps12909(c) Inter-Research, 2019info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1318472026-05-27T06:46:51Z
dc.title.none.fl_str_mv Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
title Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
spellingShingle Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
Campos, Patricia
Tortugues marines
Atlàntic, Oceà
Sea turtles
Atlantic Ocean
title_short Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
title_full Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
title_fullStr Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
title_full_unstemmed Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
title_sort Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate
dc.creator.none.fl_str_mv Campos, Patricia
Cardona Pascual, Luis
author Campos, Patricia
author_facet Campos, Patricia
Cardona Pascual, Luis
author_role author
author2 Cardona Pascual, Luis
author2_role author
dc.subject.none.fl_str_mv Tortugues marines
Atlàntic, Oceà
Sea turtles
Atlantic Ocean
topic Tortugues marines
Atlàntic, Oceà
Sea turtles
Atlantic Ocean
description The settlement of demersal animals is influenced both by physical processes ruling the distribution of pelagic juveniles in the open ocean and by their active selection of suitable benthic habitats. Green turtles Chelonia mydas inhabiting the coastal areas of the western South Atlantic Ocean derive primarily from the rookery at Ascension Island and settle over a huge area spanning from northern Brazil to Uruguay. Here, we analysed the stable C and N isotope ratios in 30 µm of carapace layers from juvenile green turtles collected from 2 distinct areas of Brazil (Praia do Forte, 12°38'S, 38°05'W, and Ubatuba, 23°26'S, 45°05'W), with the goal of reconstructing their individual diets and habitat use patterns. Juvenile neritic green turtles from Praia do Forte usually had herbivorous diets, with limited individual variability and few temporal changes in diet or habitat. Conversely, most juvenile green turtles from Ubatuba had omnivorous diets, although they exhibited high levels of individual and temporal variability. These contrasting patterns could be linked to less abundant and predictable food availability in subtropical Ubatuba compared to tropical Praia do Forte. It is unknown why large numbers of juvenile green turtles bypass foraging grounds in north-eastern Brazil to settle in subtropical or warm temperate areas, although it may be related to individual differences in growth rate and their size being too small when reaching Brazil from Ascension Island.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/131847
url https://hdl.handle.net/2445/131847
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3354/meps12909
Marine Ecology Progress Series, 2019, vol. 614, p. 173-182
https://doi.org/10.3354/meps12909
dc.rights.none.fl_str_mv (c) Inter-Research, 2019
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) Inter-Research, 2019
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Inter-Research
publisher.none.fl_str_mv Inter-Research
dc.source.none.fl_str_mv Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,228081

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