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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
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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