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北海道津軽海峡沿岸におけるマコガレイ稚魚によるハルパクチクス目の捕食

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Title: 北海道津軽海峡沿岸におけるマコガレイ稚魚によるハルパクチクス目の捕食
Other Titles: Feeding on Harpacticoid Copepods by Marbled Sole Pleuronectes yokohamae Juveniles in the Coastal Ares of Tsugaru Strait, Hokkaido
Authors: 中神, 正康1 Browse this author
髙津, 哲也2 Browse this author →KAKEN DB
松田, 泰平3 Browse this author
高橋, 豊美4 Browse this author
Authors(alt): Nakagami, Masayasu1
Takatsu, Tetsuya2
Matsuda, Taihei3
Takahashi, Toyomi4
Keywords: マコガレイ
津軽海峡
稚魚
ハルパクチクス目
捕食
Issue Date: 15-Sep-2000
Publisher: 日本水産学会
Journal Title: 日本水産学会誌
Journal Title(alt): Bulletin of the Japanese Society of Scientific Fisheries
Volume: 66
Issue: 5
Start Page: 818
End Page: 824
Publisher DOI: 10.2331/suisan.66.818
Abstract: Monthly changes in the main food items of and biased feeding on adult males of harpacticoid copepods by marbled sole Pleuronectes yokohamae juveniles were examined in the Coastal Area of Tsugaru Strait, Hokkaido, from April to September 1996 and in May 1997. At Iwabe Fishing Port in May-July 1996 and May 1997,marbled sole juveniles (≤30mm in SL) fed on harpacticoid copepods, mainly Harpacticus sp. Off Nanaehama Beach in May 1997,juveniles preyed on harpacticoids, mainly Halectinosoma sp. In August, the main food organisms of juveniles (>30mm in SL) changed from harpacticoids to small benthic crustaceans and polychaetes. In September 1996,juveniles fed chiefly on polychaetes. Adult males of Harpacticus sp. and Halectinosoma sp. were found in significantly larger numbers than adult females and copepodites (stage I-V) in fish stomachs. In contrast, no significant difference was found in the sex ratio of Harpacticus sp. on the bottom sediment at Iwabe. Because adult female harpacticoids in the stomachs of juveniles had larger body widths than adult males and copepodites, the biased feeding on adult males can not be explained by differences in prey size. The specific feeding by marbled sole juveniles might have been caused by a behavioral difference between harpacticoid males and females in their breeding season.
Rights: 本文データは学協会の許諾に基づきCiNiiから複製したものである
© 2000 公益社団法人日本水産学会
© 2000 The Japanese Society of Fisheries Science
(Relation)isversionof: http://ci.nii.ac.jp/naid/110003145104
Type: article
URI: http://hdl.handle.net/2115/38423
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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