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Effects of hypoxia on principal prey and growth of flathead flounder Hippoglossoides dubius in Funka Bay, Japan

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Title: Effects of hypoxia on principal prey and growth of flathead flounder Hippoglossoides dubius in Funka Bay, Japan
Authors: Kimura, Masafumi Browse this author
Takahashi, Toyomi Browse this author
Takatsu, Tetsuya Browse this author →KAKEN DB
Nakatani, Toshikuni Browse this author →KAKEN DB
Maeda, Tatsuaki Browse this author
Keywords: condition factor
feeding
flathead flounder
Funka Bay
growth
Hippoglossoides dubius
hypoxia
ophiuroids
Issue Date: 2004
Publisher: Japanese Society of Scientific Fisheries
Journal Title: Fisheries Science
Volume: 70
Issue: 4
Start Page: 537
End Page: 545
Publisher DOI: 10.1111/j.1444-2906.2004.00838.x
Abstract: Effects of hypoxia on the principal prey and growth of flathead flounder Hippoglossoides dubius were studied in Funka Bay. Of the three dominant year-classes that occurred in recent years, the 1995 year-class was small in total length at age ≥ 3 and low in condition factor at age ≥ 2. Ophiuroids (almost Ophiura sarsi), which were the dominant prey in the 1980s, were of little importance and instead, crustaceans such as mysids, natant decapods and pelagic amphipods, bivalves and fish were important prey items for H. dubius in 2000-2001. In addition, the feeding intensity of H. dubius in 2000-2001 was lower than that in the 1980s. These facts are closely related to a reduction of prey abundance, particularly ophiuroids. It seems that the hypoxia that occurred in the central part of the bay during the summer and autumn of 1995-1997 caused the poor food supply and low growth rate at ages 2-4 of the 1995 year-class.
Rights: © 2004 公益社団法人日本水産学会
© 2004 The Japanese Society of Fisheries Science
Type: article
URI: http://hdl.handle.net/2115/38563
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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