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Hokkaido University Collection of Scholarly and Academic Papers >
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Feeding habits of stone flounder Platichthys bicoloratus larvae in Mutsu Bay, Japan
| 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)
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Submitter: 高津 哲也
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