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Spatial distribution and feeding habits of the shrimp Crangon uritai as a predator on larval and juvenile marbled sole Pleuronectes yokohamae

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タイトル: Spatial distribution and feeding habits of the shrimp Crangon uritai as a predator on larval and juvenile marbled sole Pleuronectes yokohamae
著者: NAKAYA, Mitsuhiro 著作を一覧する
TAKATSU, Tetsuya 著作を一覧する
NAKAGAMI, Masayasu 著作を一覧する
JOH, Mikimasa 著作を一覧する
TAKAHASHI, Toyomi 著作を一覧する
キーワード: bottom water temperature
Crangon uritai
Pleuronectes yokohamae
predation
spatial distribution
発行日: 2004年 6月
出版者: The Japanese Society of Fisheries Science
誌名: Fisheries Science
巻: 70
号: 3
開始ページ: 445
終了ページ: 455
出版社 DOI: 10.1111/j.1444-2906.2004.00824.x
抄録: To examine predation on larval and juvenile Pleuronectes yokohamae by Crangon uritai, the spatial distribution and feeding habits of C. uritai were studied. Crangon uritai fed on various prey, including P. yokohamae. Density-dependent predation on juvenile Crangon spp., larval and juvenile gobiid fish Chaenogobius heptacanthus, mysids, and gammarids was observed. The abundance of alternative prey might, therefore, play an important role in reducing the pressure of predation on P. yokohamae. In each year, C. uritai migrated from depths of 10 m in March to depths of 3 m in May. There was a significant negative correlation between the weighted mean depth (WMD) of C. uritai and the weighted mean bottom water temperature (WMBWT). The migration was, therefore, delayed in the cold spring, during which C. uritai occupied depths of approximately 10 m. In contrast, no significant correlation was found between the WMD of P. yokohamae and WMBWT. Settlement of P. yokohamae began at depths of 15 m, mainly during early April. The spatial distributions of these two organisms show greater overlap during the cold spring, resulting in increased opportunities for predation.
Rights: ©2004 公益社団法人日本水産学会 The Japanese Society of Fisheries Science
©2004 公益社団法人日本水産学会 The Japanese Society of Fisheries Science
資料タイプ: article (author version)
URI: http://hdl.handle.net/2115/14609
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 高津 哲也

 

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