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Distribution and movement of larvae, juvenile and young of the pointhead flounder Hippoglossoides pinetorum in Ishikari Bay and vicinity, Hokkaido

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Title: Distribution and movement of larvae, juvenile and young of the pointhead flounder Hippoglossoides pinetorum in Ishikari Bay and vicinity, Hokkaido
Authors: Tominaga, Osamu Browse this author
Watanobe, Masamichi Browse this author
Hanyu, Masakazu Browse this author
Domon, Kazuo Browse this author
Watanabe, Yasuhiro Browse this author
Takahashi, Toyomi Browse this author
Keywords: Hippoglossoides pinetorum
movement
newly settled juvenile
nursery grounds
pelagic larvae
recruitment
Issue Date: 2000
Publisher: Japanese Society of Scientific Fisheries
Journal Title: Fisheries Science
Volume: 66
Issue: 3
Start Page: 442
End Page: 451
Publisher DOI: 10.1046/j.1444-2906.2000.00071.x
Abstract: To determine the nursery grounds and process of recruitment to adult stock, pelagic larvae, post-settlement juveniles and young fish of the pointhead flounder Hippoglossoides pinetorum, samples were collected in Ishikari Bay and the Rumoi coast, Hokkaido from 1991 to 1994. Spawning may continue from late May to mid September with the peak between July and August. However, since pelagic larvae were caught only from late July to early September in the present study, it was assumed that the restricted cohort recruited to post-settlement juvenile stage. Newly settled juveniles occurred in Ishikari Bay in September and in the Rumoi coast in late August and were mainly distributed at depths of 30-69 m. The habitat of 1-year-old and older flounder was deeper than that of 0-year-old flounder in autumn. Post-settlement juveniles gradually migrate to shallow areas during winter and their main habitats were at a depth range of 20-30 m in May. Although 1- and 2-year-old flounder were caught in the area of 20-40 m depths in June, few 3-year-old or older flounder were sampled by beam trawl. The same phenomena were recognized from the re-analyzed data of the otter trawl surveys in 1988. The pointhead flounder mainly occurred in the shallow water of the continental shelf until 2 years old and shifted their habitat to deeper areas (the upper area of the continental shelf) by 3 years old in Ishikari Bay and the surrounding area.
Rights: © 2000 公益社団法人日本水産学会
© 2000 The Japanese Society of Fisheries Science
Type: article
URI: http://hdl.handle.net/2115/38561
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高橋 豊美

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