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Seasonal variation in fish school spatial distribution and abundance under the Kuroshio regular pattern and the large meander in Suzu coastal waters

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Title: Seasonal variation in fish school spatial distribution and abundance under the Kuroshio regular pattern and the large meander in Suzu coastal waters
Authors: Zhu, Yanhui Browse this author
Minami, Kenji Browse this author →KAKEN DB
Iwahara, Yuka Browse this author
Oda, Kentaro Browse this author
Hidaka, Koichi Browse this author
Hoson, Osamu Browse this author
Morishita, Koji Browse this author
Hirota, Masahito Browse this author
Tsuru, Sentaro Browse this author
Shirakawa, Hokuto Browse this author
Miyashita, Kazushi Browse this author →KAKEN DB
Issue Date: 30-Nov-2021
Publisher: PLOS
Journal Title: PLoS ONE
Volume: 16
Issue: 11
Start Page: e0260629
Publisher DOI: 10.1371/journal.pone.0260629
Abstract: The Kuroshio Current can take two paths; usually it follows the regular pattern but occasionally it follows a pattern known as the large meander. In this study, we investigated the abundance of fish that migrate to coastal waters and the spatial distribution of fish schools under both Kuroshio patterns in Suzu district, Kochi prefecture, where the set net is the main fishery industry. We clarified the seasonal variation in the density and distribution of fish schools using a quantitative echo sounder. The effects of the Kuroshio large meander (LM) depended on the season. There was no effect of current pattern in summer or autumn, but in winter and spring the LM altered the marine environment and fish distributions. Cold water masses were formed in the survey area during winter and spring during the LM, and the water temperature dropped significantly compared with during the Kuroshio non-large meander (NLM). This altered the fish species and the distribution of fish schools in the survey area. The catches of Japanese horse mackerels (Trachurus japonicus) and Yellowtails (Seriola quinqueradiata) were much higher during the LM compared with those during the NLM. Unlike these two species, the small-sized pelagic fishes in spring has decreased significantly during the LM.
Type: article
URI: http://hdl.handle.net/2115/83921
Appears in Collections:北方生物圏フィールド科学センター (Field Science Center for Northern Biosphere) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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