Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan
Abstract We examined interdecadal variations in potential fishing grounds for the Pacific saury, Cololabis saira , off the southeastern coast of Hokkaido, Japan, for the early fishing season of August–September. We applied linear trend analysis to a time series of several oceanographic variables for...
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crwiley:10.1111/fog.12207 2024-09-15T18:16:01+00:00 Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan Kuroda, Hiroshi Yokouchi, Katsumi Agriculture, Forestry and Fisheries Research Council 2017 http://dx.doi.org/10.1111/fog.12207 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffog.12207 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fog.12207 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Fisheries Oceanography volume 26, issue 4, page 439-454 ISSN 1054-6006 1365-2419 journal-article 2017 crwiley https://doi.org/10.1111/fog.12207 2024-08-22T04:17:56Z Abstract We examined interdecadal variations in potential fishing grounds for the Pacific saury, Cololabis saira , off the southeastern coast of Hokkaido, Japan, for the early fishing season of August–September. We applied linear trend analysis to a time series of several oceanographic variables for 1993–2014. Trends in the appearance frequency of sea surface temperatures ( SST ) of 12–18 °C during August–September indicated an interdecadal reduction in the potential fishing area off the Hokkaido coast. There were localized significant increases of both SST and the sea level anomaly along the Kuril–Kamchatka Trench off the Hokkaido coast. The localized trends coincided with decadal decreases of satellite‐based chlorophyll concentrations after 2002. Analysis of mesoscale eddies revealed that the localized trends were related to clockwise (counterclockwise) eddies that appeared more frequently (less frequently) near the trench in recent years. Moreover, the Oyashio transport on the slope between the coast and the trench decreased significantly and completely disappeared in some recent summers. Interactions between the Oyashio and mesoscale eddies resulted in an interdecadal shift in the cold‐water intrusion along the main stream of the Oyashio from the along‐slope direction to the offshore direction in the upstream region of the Hokkaido coast, and large areas of favorable potential fishing grounds near the Hokkaido coast have disappeared in recent years. Article in Journal/Newspaper Kamchatka Wiley Online Library Fisheries Oceanography 26 4 439 454 |
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Wiley Online Library |
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language |
English |
description |
Abstract We examined interdecadal variations in potential fishing grounds for the Pacific saury, Cololabis saira , off the southeastern coast of Hokkaido, Japan, for the early fishing season of August–September. We applied linear trend analysis to a time series of several oceanographic variables for 1993–2014. Trends in the appearance frequency of sea surface temperatures ( SST ) of 12–18 °C during August–September indicated an interdecadal reduction in the potential fishing area off the Hokkaido coast. There were localized significant increases of both SST and the sea level anomaly along the Kuril–Kamchatka Trench off the Hokkaido coast. The localized trends coincided with decadal decreases of satellite‐based chlorophyll concentrations after 2002. Analysis of mesoscale eddies revealed that the localized trends were related to clockwise (counterclockwise) eddies that appeared more frequently (less frequently) near the trench in recent years. Moreover, the Oyashio transport on the slope between the coast and the trench decreased significantly and completely disappeared in some recent summers. Interactions between the Oyashio and mesoscale eddies resulted in an interdecadal shift in the cold‐water intrusion along the main stream of the Oyashio from the along‐slope direction to the offshore direction in the upstream region of the Hokkaido coast, and large areas of favorable potential fishing grounds near the Hokkaido coast have disappeared in recent years. |
author2 |
Agriculture, Forestry and Fisheries Research Council |
format |
Article in Journal/Newspaper |
author |
Kuroda, Hiroshi Yokouchi, Katsumi |
spellingShingle |
Kuroda, Hiroshi Yokouchi, Katsumi Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan |
author_facet |
Kuroda, Hiroshi Yokouchi, Katsumi |
author_sort |
Kuroda, Hiroshi |
title |
Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan |
title_short |
Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan |
title_full |
Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan |
title_fullStr |
Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan |
title_full_unstemmed |
Interdecadal decrease in potential fishing areas for Pacific saury off the southeastern coast of Hokkaido, Japan |
title_sort |
interdecadal decrease in potential fishing areas for pacific saury off the southeastern coast of hokkaido, japan |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1111/fog.12207 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Ffog.12207 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fog.12207 |
genre |
Kamchatka |
genre_facet |
Kamchatka |
op_source |
Fisheries Oceanography volume 26, issue 4, page 439-454 ISSN 1054-6006 1365-2419 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/fog.12207 |
container_title |
Fisheries Oceanography |
container_volume |
26 |
container_issue |
4 |
container_start_page |
439 |
op_container_end_page |
454 |
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1810453981447585792 |