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Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology

Albacore tuna (Thunnus alalunga) is an important target of tuna fisheries in the Atlantic and Indian Oceans. The commercial catch of albacore is the highest globally among all temperate tuna species, contributing around 6% in weight to global tuna catches over the last decade. The accurate assessmen...

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Autores principales: Nikolic, Natacha, Montes, Iratxe, Lalire, Maxime, Puech, Alexis, Bodin, Nathalie, Arnaud-Haond, Sophie, Kerwath, Sven, Corse, Emmanuel, Gaspar, Philippe, Hollanda, Stéphanie, Bourjea, Jérôme, West, Wendy, Bonhommeau, Sylvain
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519111/
https://www.ncbi.nlm.nih.gov/pubmed/32973260
http://dx.doi.org/10.1038/s41598-020-72369-w
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author Nikolic, Natacha
Montes, Iratxe
Lalire, Maxime
Puech, Alexis
Bodin, Nathalie
Arnaud-Haond, Sophie
Kerwath, Sven
Corse, Emmanuel
Gaspar, Philippe
Hollanda, Stéphanie
Bourjea, Jérôme
West, Wendy
Bonhommeau, Sylvain
author_facet Nikolic, Natacha
Montes, Iratxe
Lalire, Maxime
Puech, Alexis
Bodin, Nathalie
Arnaud-Haond, Sophie
Kerwath, Sven
Corse, Emmanuel
Gaspar, Philippe
Hollanda, Stéphanie
Bourjea, Jérôme
West, Wendy
Bonhommeau, Sylvain
author_sort Nikolic, Natacha
collection PubMed
description Albacore tuna (Thunnus alalunga) is an important target of tuna fisheries in the Atlantic and Indian Oceans. The commercial catch of albacore is the highest globally among all temperate tuna species, contributing around 6% in weight to global tuna catches over the last decade. The accurate assessment and management of this heavily exploited resource requires a robust understanding of the species’ biology and of the pattern of connectivity among oceanic regions, yet Indian Ocean albacore population dynamics remain poorly understood and its level of connectivity with the Atlantic Ocean population is uncertain. We analysed morphometrics and genetics of albacore (n = 1,874) in the southwest Indian (SWIO) and southeast Atlantic (SEAO) Oceans to investigate the connectivity and population structure. Furthermore, we examined the species’ dispersal potential by modelling particle drift through major oceanographic features. Males appear larger than females, except in South African waters, yet the length–weight relationship only showed significant male–female difference in one region (east of Madagascar and Reunion waters). The present study produced a genetic differentiation between the southeast Atlantic and southwest Indian Oceans, supporting their demographic independence. The particle drift models suggested dispersal potential of early life stages from SWIO to SEAO and adult or sub-adult migration from SEAO to SWIO.
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spelling pubmed-75191112020-09-29 Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology Nikolic, Natacha Montes, Iratxe Lalire, Maxime Puech, Alexis Bodin, Nathalie Arnaud-Haond, Sophie Kerwath, Sven Corse, Emmanuel Gaspar, Philippe Hollanda, Stéphanie Bourjea, Jérôme West, Wendy Bonhommeau, Sylvain Sci Rep Article Albacore tuna (Thunnus alalunga) is an important target of tuna fisheries in the Atlantic and Indian Oceans. The commercial catch of albacore is the highest globally among all temperate tuna species, contributing around 6% in weight to global tuna catches over the last decade. The accurate assessment and management of this heavily exploited resource requires a robust understanding of the species’ biology and of the pattern of connectivity among oceanic regions, yet Indian Ocean albacore population dynamics remain poorly understood and its level of connectivity with the Atlantic Ocean population is uncertain. We analysed morphometrics and genetics of albacore (n = 1,874) in the southwest Indian (SWIO) and southeast Atlantic (SEAO) Oceans to investigate the connectivity and population structure. Furthermore, we examined the species’ dispersal potential by modelling particle drift through major oceanographic features. Males appear larger than females, except in South African waters, yet the length–weight relationship only showed significant male–female difference in one region (east of Madagascar and Reunion waters). The present study produced a genetic differentiation between the southeast Atlantic and southwest Indian Oceans, supporting their demographic independence. The particle drift models suggested dispersal potential of early life stages from SWIO to SEAO and adult or sub-adult migration from SEAO to SWIO. Nature Publishing Group UK 2020-09-24 /pmc/articles/PMC7519111/ /pubmed/32973260 http://dx.doi.org/10.1038/s41598-020-72369-w Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Nikolic, Natacha
Montes, Iratxe
Lalire, Maxime
Puech, Alexis
Bodin, Nathalie
Arnaud-Haond, Sophie
Kerwath, Sven
Corse, Emmanuel
Gaspar, Philippe
Hollanda, Stéphanie
Bourjea, Jérôme
West, Wendy
Bonhommeau, Sylvain
Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
title Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
title_full Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
title_fullStr Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
title_full_unstemmed Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
title_short Connectivity and population structure of albacore tuna across southeast Atlantic and southwest Indian Oceans inferred from multidisciplinary methodology
title_sort connectivity and population structure of albacore tuna across southeast atlantic and southwest indian oceans inferred from multidisciplinary methodology
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7519111/
https://www.ncbi.nlm.nih.gov/pubmed/32973260
http://dx.doi.org/10.1038/s41598-020-72369-w
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