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夏季の北海道太平洋沖陸棚斜面域におけるキチジの食性

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Title: 夏季の北海道太平洋沖陸棚斜面域におけるキチジの食性
Other Titles: Food habits of kichiji rockfish Sebastolobus macrochir in summer on the continental slope off the Pacific coast of Hokkaido, Japan
Authors: 大村, 敏昭1 Browse this author
濱津, 友紀2 Browse this author
高橋, 豊美3 Browse this author
Authors(alt): Ohmura, Toshiaki1
Hamatsu, Tomonori2
Takahashi, Toyomi3
Keywords: キチジ
クモヒトデ
食性
ベントス
陸棚斜面
Issue Date: 15-Jul-2005
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: 71
Issue: 4
Start Page: 584
End Page: 593
Publisher DOI: 10.2331/suisan.71.584
Abstract: The food habits of kichiji rockfish Sebastolobus macrochir were studied off the Pacific coast of Hokkaido. Fish samples were collected with a bottom trawl net at depths of 300-1,000m in the daytime in July 2001 and 2002. Benthic invertebrates were collected with a Smith-McIntyre grab and a sledge net in July-August 2002. The percentage of empty stomachs of S. macrochir was low particularly in fish ≤150mm SL, indicating active feeding during the summer. Dietary analysis was conducted using 897 fish (43-271mm SL). The principal prey item changed from small crustaceans such as gammarids and cumaceans to crustacean decapods and ophiuroids (chiefly Ophiura leptoctenia) with increase of fish length. Ophiuroids, which are probably the most abundant prey in this study area, became very important in the diets of S. macrochir with the growth of fish. In addition, ophiuroid feeders including S. macrochir are very low in biomass in this study area. Such a foraging strategy of S. macrochir seems to reduce the intra-and inter-specific competition for food.
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
© 2005 公益社団法人日本水産学会
© 2005 The Japanese Society of Fisheries Science
(Relation)isversionof: http://ci.nii.ac.jp/naid/110003169435
Type: article
URI: http://hdl.handle.net/2115/38424
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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