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Feeding habits of stone flounder Platichthys bicoloratus larvae in Mutsu Bay, Japan

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Title: Feeding habits of stone flounder Platichthys bicoloratus larvae in Mutsu Bay, Japan
Authors: Takatsu, Tetsuya Browse this author →KAKEN DB
Suzuki, Yuusuke Browse this author
Shimizu, Akiko Browse this author
Imura, Kazuo Browse this author
Hiraoka, Yuko Browse this author
Shiga, Naonobu Browse this author →KAKEN DB
Issue Date: Feb-2007
Publisher: Blackwell Publishing
Journal Title: Fisheries Science
Volume: 73
Issue: 1
Start Page: 142
End Page: 155
Publisher DOI: 10.1111/j.1444-2906.2007.01312.x
Abstract: To clarify the feeding strategy of pelagic larvae of stone flounder in Mutsu Bay, the dietary composition and prey size was investigated from February to April during 1989–1999. Diets were compared with the numerical and volumetric compositions and frequency of occurrence of each prey species. Mensuration formulae were applied to estimate individual prey volume in the diet, while the length of planktonic species was measured from net and water samples. Prey shapes were assumed as sphere, cylinder, ellipsoid, pyramid, two elliptical cones, or a combination of ellipsoid and cylinder. Prey-size range increased as the larvae grew. Preflexion larvae fed mainly on copepod nauplii. Flexion and postflexion larvae ingested primarily appendicularians, with a suggestion that these larvae might depend on some parts of the microbial food web. Low frequencies of flexion and postflexion larvae with empty guts (1.7 and 1.4%, respectively) might be derived from feeding on slow-swimming appendicularians. From a size comparison between 'house'-like organ length and trunk length of the appendicularian Oikopleura sp., almost all house-like organs with trunks in the larval diet were nonexpanded 'house rudiments', not expanded 'houses'. Thus, stone flounder larvae may not chew the houses, but swallow the house rudiments with trunks.
Rights: © 2007 公益社団法人日本水産学会
© 2007 The Japanese Society of Fisheries Science
Type: article (author version)
URI: http://hdl.handle.net/2115/22540
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: 高津 哲也

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