Lessons from the past: investigating historical data from bluefin tuna fisheries
Abstract In 1963, the leading fisheries targeting Atlantic bluefin tuna ( Thunnus thynnus ) in the Norwegian Sea and North Sea suddenly collapsed without any warning. Little is known about this collapse and several hypotheses have been put forward, such as changes in migratory routes, recruitment fa...
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crwiley:10.1111/j.1467-2979.2008.00311.x 2024-06-02T08:11:53+00:00 Lessons from the past: investigating historical data from bluefin tuna fisheries Fromentin, Jean‐Marc 2009 http://dx.doi.org/10.1111/j.1467-2979.2008.00311.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1467-2979.2008.00311.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1467-2979.2008.00311.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fish and Fisheries volume 10, issue 2, page 197-216 ISSN 1467-2960 1467-2979 journal-article 2009 crwiley https://doi.org/10.1111/j.1467-2979.2008.00311.x 2024-05-03T11:51:18Z Abstract In 1963, the leading fisheries targeting Atlantic bluefin tuna ( Thunnus thynnus ) in the Norwegian Sea and North Sea suddenly collapsed without any warning. Little is known about this collapse and several hypotheses have been put forward, such as changes in migratory routes, recruitment failure or eradication of a sub‐population: all of these hypotheses could result from natural causes and/or from overfishing. To help explain this mysterious event, an original data set of the main bluefin tuna fisheries of the 20th century, including total catch and size composition of the catch, has been compiled and analysed. The results reveal a strong and unambiguous link between the Nordic purse seine and Spanish trap fisheries during the 1950s and 1960s. However, this link vanished during the 1970s. In addition, the North‐west Atlantic and Mediterranean trap fisheries appeared also to be partially connected to the Nordic fisheries. During the 1950s and 1960s, the main migration routes of bluefin tuna were probably from the Mediterranean spawning grounds and from the West Atlantic coasts to the Norwegian coast and North Sea, which were probably a key feeding ground at that time. The analyses also lead to the conclusion that interactions between environmental, trophic and fishing processes have probably affected bluefin tuna migration patterns which would have finally caused the Nordic fisheries collapse. This retrospective analysis finally leads to an original – albeit more speculative – hypothesis concerning Atlantic bluefin tuna population structure, therein conjectured as an assemblage of at least three sub‐populations. Article in Journal/Newspaper North West Atlantic Norwegian Sea Wiley Online Library Norwegian Sea Fish and Fisheries 10 2 197 216 |
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English |
description |
Abstract In 1963, the leading fisheries targeting Atlantic bluefin tuna ( Thunnus thynnus ) in the Norwegian Sea and North Sea suddenly collapsed without any warning. Little is known about this collapse and several hypotheses have been put forward, such as changes in migratory routes, recruitment failure or eradication of a sub‐population: all of these hypotheses could result from natural causes and/or from overfishing. To help explain this mysterious event, an original data set of the main bluefin tuna fisheries of the 20th century, including total catch and size composition of the catch, has been compiled and analysed. The results reveal a strong and unambiguous link between the Nordic purse seine and Spanish trap fisheries during the 1950s and 1960s. However, this link vanished during the 1970s. In addition, the North‐west Atlantic and Mediterranean trap fisheries appeared also to be partially connected to the Nordic fisheries. During the 1950s and 1960s, the main migration routes of bluefin tuna were probably from the Mediterranean spawning grounds and from the West Atlantic coasts to the Norwegian coast and North Sea, which were probably a key feeding ground at that time. The analyses also lead to the conclusion that interactions between environmental, trophic and fishing processes have probably affected bluefin tuna migration patterns which would have finally caused the Nordic fisheries collapse. This retrospective analysis finally leads to an original – albeit more speculative – hypothesis concerning Atlantic bluefin tuna population structure, therein conjectured as an assemblage of at least three sub‐populations. |
format |
Article in Journal/Newspaper |
author |
Fromentin, Jean‐Marc |
spellingShingle |
Fromentin, Jean‐Marc Lessons from the past: investigating historical data from bluefin tuna fisheries |
author_facet |
Fromentin, Jean‐Marc |
author_sort |
Fromentin, Jean‐Marc |
title |
Lessons from the past: investigating historical data from bluefin tuna fisheries |
title_short |
Lessons from the past: investigating historical data from bluefin tuna fisheries |
title_full |
Lessons from the past: investigating historical data from bluefin tuna fisheries |
title_fullStr |
Lessons from the past: investigating historical data from bluefin tuna fisheries |
title_full_unstemmed |
Lessons from the past: investigating historical data from bluefin tuna fisheries |
title_sort |
lessons from the past: investigating historical data from bluefin tuna fisheries |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1111/j.1467-2979.2008.00311.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1467-2979.2008.00311.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1467-2979.2008.00311.x |
geographic |
Norwegian Sea |
geographic_facet |
Norwegian Sea |
genre |
North West Atlantic Norwegian Sea |
genre_facet |
North West Atlantic Norwegian Sea |
op_source |
Fish and Fisheries volume 10, issue 2, page 197-216 ISSN 1467-2960 1467-2979 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1467-2979.2008.00311.x |
container_title |
Fish and Fisheries |
container_volume |
10 |
container_issue |
2 |
container_start_page |
197 |
op_container_end_page |
216 |
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1800758163865075712 |