What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters?
International audience The European sardine, Sardina pilchardus, exhibits a complex population structure, which has produced conflicting results in previous genetic studies. Despite its importance in the fisheries industry, stock delineation for management and conservation purposes is still a matter...
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ftinsu:oai:HAL:hal-01128199v1 2024-02-11T10:07:04+01:00 What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters? Jemaa, Sherif Bacha, Mahmoud Khalaf, Gaby Dessailly, David Rabhi, Khalef Amara, Rachid Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) 2015-02 https://hal.science/hal-01128199 https://doi.org/10.1016/j.seares.2014.11.002 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.seares.2014.11.002 hal-01128199 https://hal.science/hal-01128199 doi:10.1016/j.seares.2014.11.002 ISSN: 1385-1101 EISSN: 1873-1414 Journal of Sea Research (JSR) https://hal.science/hal-01128199 Journal of Sea Research (JSR), 2015, 96, pp.11-17. ⟨10.1016/j.seares.2014.11.002⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2015 ftinsu https://doi.org/10.1016/j.seares.2014.11.002 2024-01-24T17:39:56Z International audience The European sardine, Sardina pilchardus, exhibits a complex population structure, which has produced conflicting results in previous genetic studies. Despite its importance in the fisheries industry, stock delineation for management and conservation purposes is still a matter of debate throughout the distribution range of the species. This study examines whether otolith shapes are more efficient than genetic markers to detect population structure in pelagic species with large population sizes. Sardines were analyzed from 15 sampling localities in the Northeast Atlantic and Mediterranean Sea covering almost the whole distribution range of the species. A combination of otolith shape indices and elliptic Fourier descriptors was investigated by multivariate statistical procedures. Within the studied area, three distinct groups were identified with an overall correct classification of 77%. Group A: northern Mediterranean Sea and Gulf of Gabès; group B: Atlantic Morocco–south Alboran–Algero-provençal coasts; and group C: European Atlantic coast. The Almeria–Oran front and the Gibraltar strait are not an efficient barrier for sardine population separation as there seems to be exchanges between populations of the south-western Mediterranean Sea and those of the Moroccan Atlantic Ocean coast or Gulf of Cadiz. The results are discussed in relation to environmental conditions, oceanographic features, and physical barriers to dispersal in the study area, and compared with those obtained by previous genetic, morphometric, and meristic data. For pelagic species with high gene flow, present results highlighted the need to take into account the identification of phenotypic stocks to ensure sustainable fishery benefits and efficient conservation as they may have unique demographic properties and responses to exploitation. Article in Journal/Newspaper Northeast Atlantic Institut national des sciences de l'Univers: HAL-INSU Journal of Sea Research 96 11 17 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
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ftinsu |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
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[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Jemaa, Sherif Bacha, Mahmoud Khalaf, Gaby Dessailly, David Rabhi, Khalef Amara, Rachid What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters? |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience The European sardine, Sardina pilchardus, exhibits a complex population structure, which has produced conflicting results in previous genetic studies. Despite its importance in the fisheries industry, stock delineation for management and conservation purposes is still a matter of debate throughout the distribution range of the species. This study examines whether otolith shapes are more efficient than genetic markers to detect population structure in pelagic species with large population sizes. Sardines were analyzed from 15 sampling localities in the Northeast Atlantic and Mediterranean Sea covering almost the whole distribution range of the species. A combination of otolith shape indices and elliptic Fourier descriptors was investigated by multivariate statistical procedures. Within the studied area, three distinct groups were identified with an overall correct classification of 77%. Group A: northern Mediterranean Sea and Gulf of Gabès; group B: Atlantic Morocco–south Alboran–Algero-provençal coasts; and group C: European Atlantic coast. The Almeria–Oran front and the Gibraltar strait are not an efficient barrier for sardine population separation as there seems to be exchanges between populations of the south-western Mediterranean Sea and those of the Moroccan Atlantic Ocean coast or Gulf of Cadiz. The results are discussed in relation to environmental conditions, oceanographic features, and physical barriers to dispersal in the study area, and compared with those obtained by previous genetic, morphometric, and meristic data. For pelagic species with high gene flow, present results highlighted the need to take into account the identification of phenotypic stocks to ensure sustainable fishery benefits and efficient conservation as they may have unique demographic properties and responses to exploitation. |
author2 |
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Institut national des sciences de l'Univers (INSU - CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD France-Nord ) |
format |
Article in Journal/Newspaper |
author |
Jemaa, Sherif Bacha, Mahmoud Khalaf, Gaby Dessailly, David Rabhi, Khalef Amara, Rachid |
author_facet |
Jemaa, Sherif Bacha, Mahmoud Khalaf, Gaby Dessailly, David Rabhi, Khalef Amara, Rachid |
author_sort |
Jemaa, Sherif |
title |
What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters? |
title_short |
What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters? |
title_full |
What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters? |
title_fullStr |
What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters? |
title_full_unstemmed |
What can otolith shape analysis tell us about population structure of the European sardine, Sardina pilchardus, from Atlantic and Mediterranean waters? |
title_sort |
what can otolith shape analysis tell us about population structure of the european sardine, sardina pilchardus, from atlantic and mediterranean waters? |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.science/hal-01128199 https://doi.org/10.1016/j.seares.2014.11.002 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 1385-1101 EISSN: 1873-1414 Journal of Sea Research (JSR) https://hal.science/hal-01128199 Journal of Sea Research (JSR), 2015, 96, pp.11-17. ⟨10.1016/j.seares.2014.11.002⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.seares.2014.11.002 hal-01128199 https://hal.science/hal-01128199 doi:10.1016/j.seares.2014.11.002 |
op_doi |
https://doi.org/10.1016/j.seares.2014.11.002 |
container_title |
Journal of Sea Research |
container_volume |
96 |
container_start_page |
11 |
op_container_end_page |
17 |
_version_ |
1790605183714066432 |