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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ftubarcepubl:oai:diposit.ub.edu:2445/131847 2024-04-28T08:38:15+00:00 Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate Campos, Patricia Cardona Pascual, Luis 2019-04-05 10 p. application/pdf http://hdl.handle.net/2445/131847 eng eng Inter-Research 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 0171-8630 http://hdl.handle.net/2445/131847 689611 (c) Inter-Research, 2019 info:eu-repo/semantics/openAccess Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) Tortugues marines Atlàntic Oceà Sea turtles Atlantic Ocean info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftubarcepubl https://doi.org/10.3354/meps12909 2024-04-10T23:30:48Z 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. Article in Journal/Newspaper South Atlantic Ocean Dipòsit Digital de la Universitat de Barcelona Marine Ecology Progress Series 614 173 182 |
institution |
Open Polar |
collection |
Dipòsit Digital de la Universitat de Barcelona |
op_collection_id |
ftubarcepubl |
language |
English |
topic |
Tortugues marines Atlàntic Oceà Sea turtles Atlantic Ocean |
spellingShingle |
Tortugues marines Atlàntic Oceà Sea turtles Atlantic Ocean Campos, Patricia Cardona Pascual, Luis Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate |
topic_facet |
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. |
format |
Article in Journal/Newspaper |
author |
Campos, Patricia Cardona Pascual, Luis |
author_facet |
Campos, Patricia Cardona Pascual, Luis |
author_sort |
Campos, Patricia |
title |
Individual variability in the settlement of juvenile green turtles in the western South Atlantic: relevance of currents and somatic growth rate |
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 |
publisher |
Inter-Research |
publishDate |
2019 |
url |
http://hdl.handle.net/2445/131847 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) |
op_relation |
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 0171-8630 http://hdl.handle.net/2445/131847 689611 |
op_rights |
(c) Inter-Research, 2019 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps12909 |
container_title |
Marine Ecology Progress Series |
container_volume |
614 |
container_start_page |
173 |
op_container_end_page |
182 |
_version_ |
1797569482291412992 |