Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis
European anchovy, Engraulis encrasicolus, is a small pelagic coastal marine fish largely spread from the North Sea to central Africa, including the entire Mediterranean and the Black and Azov Seas. The aim of the study is to understand the potential different population structure and their relations...
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IOS2018 - 6th International Otolith Symposium 2018. 15 - 20 April Keelung, Taiwan
2018
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ftarchimer:oai:archimer.ifremer.fr:54722 2023-05-15T17:41:14+02:00 Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis Akkus, Gizem Jemaa, Sharif Cemal Gucu, Ali Marchal, Paul Carbonara, Pierluigi Bacha, Mahmoud Amara, Rachid Ernande, Bruno Saraux, Claire Mahe, Kelig 2018 application/pdf https://archimer.ifremer.fr/doc/00436/54722/56157.pdf https://archimer.ifremer.fr/doc/00436/54722/ eng eng IOS2018 - 6th International Otolith Symposium 2018. 15 - 20 April Keelung, Taiwan https://archimer.ifremer.fr/doc/00436/54722/56157.pdf https://archimer.ifremer.fr/doc/00436/54722/ info:eu-repo/semantics/openAccess restricted use text Poster info:eu-repo/semantics/conferenceObject 2018 ftarchimer 2021-09-23T20:30:54Z European anchovy, Engraulis encrasicolus, is a small pelagic coastal marine fish largely spread from the North Sea to central Africa, including the entire Mediterranean and the Black and Azov Seas. The aim of the study is to understand the potential different population structure and their relationship between the Northeast Atlantic, Western, Eastern Mediterranean and the Black Sea anchovy population. The outlines of 2127 sagittal otoliths were collected from nineteen locations (English Channel, Atlantic, the Mediterranean and Black Sea), and added to existing information available from a previous study. Elliptical Fourier Analysis (EFA) was used to analyze the otolith shape variations among locations. Before examining the geographical differentiation by Linear discriminant (LDA) and Hierarchical Clustering Analysis, potentially confounding sources of variation (sex, fish length, otolith side and sampling year) were analyzed by partial RDA. Sex, sampling year and otolith side have no significant effect on the outline of otoliths. However, after taking into consideration the ontogenic effect, the geographical area has affects otolith shapes significantly. Three different groups of anchovies were identified: Atlantic-Southwestern Mediterranean, Northwestern-Eastern Mediterranean and Black Sea with a classification score of 80%. These results have implications for the stock management of anchovy populations from the North Sea to the Black Sea. Conference Object Northeast Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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Open Polar |
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Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
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ftarchimer |
language |
English |
description |
European anchovy, Engraulis encrasicolus, is a small pelagic coastal marine fish largely spread from the North Sea to central Africa, including the entire Mediterranean and the Black and Azov Seas. The aim of the study is to understand the potential different population structure and their relationship between the Northeast Atlantic, Western, Eastern Mediterranean and the Black Sea anchovy population. The outlines of 2127 sagittal otoliths were collected from nineteen locations (English Channel, Atlantic, the Mediterranean and Black Sea), and added to existing information available from a previous study. Elliptical Fourier Analysis (EFA) was used to analyze the otolith shape variations among locations. Before examining the geographical differentiation by Linear discriminant (LDA) and Hierarchical Clustering Analysis, potentially confounding sources of variation (sex, fish length, otolith side and sampling year) were analyzed by partial RDA. Sex, sampling year and otolith side have no significant effect on the outline of otoliths. However, after taking into consideration the ontogenic effect, the geographical area has affects otolith shapes significantly. Three different groups of anchovies were identified: Atlantic-Southwestern Mediterranean, Northwestern-Eastern Mediterranean and Black Sea with a classification score of 80%. These results have implications for the stock management of anchovy populations from the North Sea to the Black Sea. |
format |
Conference Object |
author |
Akkus, Gizem Jemaa, Sharif Cemal Gucu, Ali Marchal, Paul Carbonara, Pierluigi Bacha, Mahmoud Amara, Rachid Ernande, Bruno Saraux, Claire Mahe, Kelig |
spellingShingle |
Akkus, Gizem Jemaa, Sharif Cemal Gucu, Ali Marchal, Paul Carbonara, Pierluigi Bacha, Mahmoud Amara, Rachid Ernande, Bruno Saraux, Claire Mahe, Kelig Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis |
author_facet |
Akkus, Gizem Jemaa, Sharif Cemal Gucu, Ali Marchal, Paul Carbonara, Pierluigi Bacha, Mahmoud Amara, Rachid Ernande, Bruno Saraux, Claire Mahe, Kelig |
author_sort |
Akkus, Gizem |
title |
Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis |
title_short |
Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis |
title_full |
Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis |
title_fullStr |
Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis |
title_full_unstemmed |
Understanding the Population Structure of the European Anchovy (Engraulis encrasicolus) in the Black Sea, Mediterranean Sea and Northeast Atlantic Ocean by Using Otolith Shape Analysis |
title_sort |
understanding the population structure of the european anchovy (engraulis encrasicolus) in the black sea, mediterranean sea and northeast atlantic ocean by using otolith shape analysis |
publisher |
IOS2018 - 6th International Otolith Symposium 2018. 15 - 20 April Keelung, Taiwan |
publishDate |
2018 |
url |
https://archimer.ifremer.fr/doc/00436/54722/56157.pdf https://archimer.ifremer.fr/doc/00436/54722/ |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
https://archimer.ifremer.fr/doc/00436/54722/56157.pdf https://archimer.ifremer.fr/doc/00436/54722/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
_version_ |
1766142675057115136 |