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Comparison of the nutritional transition date distributions of marbled sole larvae and juveniles in Hakodate Bay, Hokkaido

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タイトル: Comparison of the nutritional transition date distributions of marbled sole larvae and juveniles in Hakodate Bay, Hokkaido
著者: Joh, Mikimasa 著作を一覧する
Takatsu, Tetsuya 著作を一覧する
Nakaya, Mitsuhiro 著作を一覧する
Yoshida, Naoto 著作を一覧する
Nakagami, Masayasu 著作を一覧する
キーワード: Diet
Larvae and juveniles
Marbled sole
Nutritional transition
Otolith microstructure analysis
Oyashio coastal water
Pseudopleuronectes yokohamae
発行日: 2009年 5月
出版者: Springer Japan
誌名: Fisheries Science
巻: 75
号: 3
開始ページ: 619
終了ページ: 628
出版社 DOI: 10.1007/s12562-009-0086-0
抄録: To examine survival processes in marbled sole Pseudopleuronectes yokohamae larvae, nutritional-transition-date distributions (NTDDs) were compared between larvae and large juveniles (LJs) in Hakodate Bay from 2001 to 2003. NTDDs were used instead of hatch-date distributions because the onset of increment formation coincides with the timing of the transition from endogenous to exogenous nutritional sources for marbled sole. LJs were defined as being large enough to be safe from predation by the sand shrimp Crangon uritai. In 2001 and 2002, the ranges of the NTDDs of LJs largely overlapped with those of the larvae. However, in 2003, the early cohort (those whose otolith rings formed before 17 March) disappeared from the NTDDs during and after April, and the NTDDs of LJs were heavily biased toward a later period than those of the larvae. In 2003, Oyashio Coastal Water (< 3 ℃ and 33.0 salinity) unexpectedly intruded into the bay in late March and lowered the water temperature from 6.3 ℃ on 6 March to 4.1 ℃ on 25 March. One possible cause of mortality in the early cohort of 2003 might be feeding failure caused by the extremely low water temperature.
Rights: The original publication is available at
資料タイプ: article (author version)
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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