Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)
Two stocks of bluefin tuna (Thunnus thynnus) inhabit the north Atlantic; the western and eastern stocks spawn in the Gulf of Mexico and the Mediterranean Sea respectively. Trans-Atlantic movements occur outside spawning time whereas natal homing maintains stock structure. Commercial fisheries may ex...
Published in: | Marine and Freshwater Research |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , |
Other Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2016
|
Subjects: | |
Online Access: | https://hdl.handle.net/20.500.12627/94634 https://doi.org/10.1071/mf15086 |
id |
ftistanbuluniv:oai:http://acikerisim.istanbul.edu.tr:20.500.12627/94634 |
---|---|
record_format |
openpolar |
spelling |
ftistanbuluniv:oai:http://acikerisim.istanbul.edu.tr:20.500.12627/94634 2024-06-23T07:55:02+00:00 Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus) Fromentin, Jean Marc Garibaldi, Fulvio Katavic, Ivan Tinti, Fausto Macias, David Busawon, Dheeraj Hanke, Alex Kimoto, Ai SAKAI, Osamu DEGUARA, Simeon ABID, Nouredinne Santos, Miguel Neves Brophy, Deirdre Karakulak, Firdes Saadet Haynes, Paula ARRIZABALAGA, Haritz Fraile, Igaratza Galway Mayo Inst Technol , , 62076 2016 https://hdl.handle.net/20.500.12627/94634 https://doi.org/10.1071/mf15086 eng eng MARINE AND FRESHWATER RESEARCH Brophy D., Haynes P., ARRIZABALAGA H., Fraile I., Fromentin J. M. , Garibaldi F., Katavic I., Tinti F., Karakulak F. S. , Macias D., et al., "Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)", MARINE AND FRESHWATER RESEARCH, cilt.67, ss.1023-1036, 2016 1323-1650 av_8bd772ca-ed5f-4139-8e86-a50b4219380c vv_1032021 http://hdl.handle.net/20.500.12627/94634 https://doi.org/10.1071/mf15086 67 7 1023 1036 Su Hasadı BALIKÇILIK Bitki ve Hayvan Bilimleri Tarım ve Çevre Bilimleri (AGE) LİMNOLOJİ Yerbilimleri Temel Bilimler (SCI) DENİZ VE TATLISU BİYOLOJİSİ OŞİNOGRAFİ Tarımsal Bilimler Ziraat Toprak ve Bitki Besleme Toprak ve Su Muhafazası ve Amenajmanı Su Ürünleri Deniz Bilimleri ve Teknolojisi Oşinografi Fiziksel Oşinografi Mühendislik ve Teknoloji Makale 2016 ftistanbuluniv https://doi.org/20.500.12627/9463410.1071/mf15086 2024-06-06T04:07:48Z Two stocks of bluefin tuna (Thunnus thynnus) inhabit the north Atlantic; the western and eastern stocks spawn in the Gulf of Mexico and the Mediterranean Sea respectively. Trans-Atlantic movements occur outside spawning time whereas natal homing maintains stock structure. Commercial fisheries may exploit a mixed assemblage of both stocks. The incorporation of mixing rates into stock assessment is precluded by uncertainties surrounding stock discrimination. Otolith shape descriptors were used to characterise western and eastern stocks of Atlantic bluefin tuna in the present study and to estimate stock composition in catches of unknown origin. Otolith shape varied with length and between locations and years. Within a restricted size range (200-297-cm fork length (FL)) the two stocks were distinguished with an accuracy of 83%. Bayesian stock mixture analysis indicated that samples from the east Atlantic and Mediterranean were predominantly of eastern origin. The proportion assigned to the eastern stock showed slight spatial variation; however, overlapping 95% credible intervals indicated no significant difference (200-297 cm FL: central Atlantic, 73-100%; Straits of Gibraltar, 73-100%; Morocco, 50-99%; Portugal 64-100%). Otolith shape could be used in combination with other population markers to improve the accuracy of mixing rate estimates for Atlantic bluefin tuna. Article in Journal/Newspaper North Atlantic İstanbul Üniversitesi Açık Erişim Sistemi Marine and Freshwater Research 67 7 1023 |
institution |
Open Polar |
collection |
İstanbul Üniversitesi Açık Erişim Sistemi |
op_collection_id |
ftistanbuluniv |
language |
English |
topic |
Su Hasadı BALIKÇILIK Bitki ve Hayvan Bilimleri Tarım ve Çevre Bilimleri (AGE) LİMNOLOJİ Yerbilimleri Temel Bilimler (SCI) DENİZ VE TATLISU BİYOLOJİSİ OŞİNOGRAFİ Tarımsal Bilimler Ziraat Toprak ve Bitki Besleme Toprak ve Su Muhafazası ve Amenajmanı Su Ürünleri Deniz Bilimleri ve Teknolojisi Oşinografi Fiziksel Oşinografi Mühendislik ve Teknoloji |
spellingShingle |
Su Hasadı BALIKÇILIK Bitki ve Hayvan Bilimleri Tarım ve Çevre Bilimleri (AGE) LİMNOLOJİ Yerbilimleri Temel Bilimler (SCI) DENİZ VE TATLISU BİYOLOJİSİ OŞİNOGRAFİ Tarımsal Bilimler Ziraat Toprak ve Bitki Besleme Toprak ve Su Muhafazası ve Amenajmanı Su Ürünleri Deniz Bilimleri ve Teknolojisi Oşinografi Fiziksel Oşinografi Mühendislik ve Teknoloji Fromentin, Jean Marc Garibaldi, Fulvio Katavic, Ivan Tinti, Fausto Macias, David Busawon, Dheeraj Hanke, Alex Kimoto, Ai SAKAI, Osamu DEGUARA, Simeon ABID, Nouredinne Santos, Miguel Neves Brophy, Deirdre Karakulak, Firdes Saadet Haynes, Paula ARRIZABALAGA, Haritz Fraile, Igaratza Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus) |
topic_facet |
Su Hasadı BALIKÇILIK Bitki ve Hayvan Bilimleri Tarım ve Çevre Bilimleri (AGE) LİMNOLOJİ Yerbilimleri Temel Bilimler (SCI) DENİZ VE TATLISU BİYOLOJİSİ OŞİNOGRAFİ Tarımsal Bilimler Ziraat Toprak ve Bitki Besleme Toprak ve Su Muhafazası ve Amenajmanı Su Ürünleri Deniz Bilimleri ve Teknolojisi Oşinografi Fiziksel Oşinografi Mühendislik ve Teknoloji |
description |
Two stocks of bluefin tuna (Thunnus thynnus) inhabit the north Atlantic; the western and eastern stocks spawn in the Gulf of Mexico and the Mediterranean Sea respectively. Trans-Atlantic movements occur outside spawning time whereas natal homing maintains stock structure. Commercial fisheries may exploit a mixed assemblage of both stocks. The incorporation of mixing rates into stock assessment is precluded by uncertainties surrounding stock discrimination. Otolith shape descriptors were used to characterise western and eastern stocks of Atlantic bluefin tuna in the present study and to estimate stock composition in catches of unknown origin. Otolith shape varied with length and between locations and years. Within a restricted size range (200-297-cm fork length (FL)) the two stocks were distinguished with an accuracy of 83%. Bayesian stock mixture analysis indicated that samples from the east Atlantic and Mediterranean were predominantly of eastern origin. The proportion assigned to the eastern stock showed slight spatial variation; however, overlapping 95% credible intervals indicated no significant difference (200-297 cm FL: central Atlantic, 73-100%; Straits of Gibraltar, 73-100%; Morocco, 50-99%; Portugal 64-100%). Otolith shape could be used in combination with other population markers to improve the accuracy of mixing rate estimates for Atlantic bluefin tuna. |
author2 |
Galway Mayo Inst Technol , , 62076 |
format |
Article in Journal/Newspaper |
author |
Fromentin, Jean Marc Garibaldi, Fulvio Katavic, Ivan Tinti, Fausto Macias, David Busawon, Dheeraj Hanke, Alex Kimoto, Ai SAKAI, Osamu DEGUARA, Simeon ABID, Nouredinne Santos, Miguel Neves Brophy, Deirdre Karakulak, Firdes Saadet Haynes, Paula ARRIZABALAGA, Haritz Fraile, Igaratza |
author_facet |
Fromentin, Jean Marc Garibaldi, Fulvio Katavic, Ivan Tinti, Fausto Macias, David Busawon, Dheeraj Hanke, Alex Kimoto, Ai SAKAI, Osamu DEGUARA, Simeon ABID, Nouredinne Santos, Miguel Neves Brophy, Deirdre Karakulak, Firdes Saadet Haynes, Paula ARRIZABALAGA, Haritz Fraile, Igaratza |
author_sort |
Fromentin, Jean Marc |
title |
Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus) |
title_short |
Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus) |
title_full |
Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus) |
title_fullStr |
Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus) |
title_full_unstemmed |
Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus) |
title_sort |
otolith shape variation provides a marker of stock origin for north atlantic bluefin tuna (thunnus thynnus) |
publishDate |
2016 |
url |
https://hdl.handle.net/20.500.12627/94634 https://doi.org/10.1071/mf15086 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
MARINE AND FRESHWATER RESEARCH Brophy D., Haynes P., ARRIZABALAGA H., Fraile I., Fromentin J. M. , Garibaldi F., Katavic I., Tinti F., Karakulak F. S. , Macias D., et al., "Otolith shape variation provides a marker of stock origin for north Atlantic bluefin tuna (Thunnus thynnus)", MARINE AND FRESHWATER RESEARCH, cilt.67, ss.1023-1036, 2016 1323-1650 av_8bd772ca-ed5f-4139-8e86-a50b4219380c vv_1032021 http://hdl.handle.net/20.500.12627/94634 https://doi.org/10.1071/mf15086 67 7 1023 1036 |
op_doi |
https://doi.org/20.500.12627/9463410.1071/mf15086 |
container_title |
Marine and Freshwater Research |
container_volume |
67 |
container_issue |
7 |
container_start_page |
1023 |
_version_ |
1802647439843262464 |