Diet of the mesopelagic fish Notoscopelus japonicus (Family: Myctophidae) associated with the continental slope off the Pacific coast of Honshu, Japan
スポンサーリンク
概要
- 論文の詳細を見る
The diet of Notoscopelus japonicus, one of the dominant mesopelagic fishes in the transitional waters of the western North Pacific, was examined in 106 specimens collected over the continental slope off the Pacific coast of northern Japan during April and October 1996. The prey comprised mainly crustaceans, such as copepods, ostracods, euphausiids and amphipods. Euphausia pacifica was the dominant prey, representing 83.1% by number and 72.4% by wet weight of the total diet. Between April and October, there was no shift in prey species consumed, but prey size decreased significantly and prey number per fish stomach increased in October. These results indicate that, in October, N. japonicus consumed larger numbers of smaller E. pacifica, rather than shifting to other prey taxa. The pronounced importance of E. pacifica in the diet was ascribed to its co-occurrence with N. japonicus at night in the surface layer and during the daytime in the near-bottom layer.
- The Japanese Society of Scientific Fisheriesの論文
- 2002-10-01
著者
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YAMAMURA ORIO
Hokkaido National Fisheries Research Institute
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SAKURAI YASUNORI
Graduate School of Fisheries Sciences, Hokkaido University
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Uchikawa Kazuhisa
Graduate School Of Fisheries Sciences Hokkaido University
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Sakurai Yasunori
Graduate School Of Fisheries Sciences Hokkaido University
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Yamamura O
Hokkaido National Fisheries Res. Inst. Hokkaido Jpn
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Kitagawa Daiji
Hachinohe Branch Tohoku National Fisheries Research Institute
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Kitagawa Daiji
Tohoku National Fisheries Research Institute
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Sakurai Y
Graduate School Of Fisheries Sciences Hokkaido University
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Sakurai Yasunori
Graduate School Of Fisheries Science Hokkaido University
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桜井 泰憲
北海道大学水産科学院資源生物学講座資源生態学領域
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