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Diet of the mesopelagic fish Notoscopelus japonicus (Family: Myctophidae) associated with the continental slope off the Pacific coast of Honshu, Japan

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Title: Diet of the mesopelagic fish Notoscopelus japonicus (Family: Myctophidae) associated with the continental slope off the Pacific coast of Honshu, Japan
Authors: Uchikawa, Kazuhisa Browse this author
Yamamura, Orio Browse this author
Kitagawa, Daiji Browse this author
Sakurai, Yasunori Browse this author →KAKEN DB
Keywords: diet
Euphausia pacifica
euphausiids
mesopelagic fish
myctophids
Notoscopelus japonicus
upper continental slope
Issue Date: Oct-2002
Publisher: The Japanese Society of Scientific Fisheries
Journal Title: Fisheries Science
Volume: 68
Issue: 5
Start Page: 1034
End Page: 1040
Publisher DOI: 10.1046/j.1444-2906.2002.00529.x
Abstract: 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.
Rights: © 2002 公益社団法人日本水産学会
© 2002 The Japanese Society of Fisheries Science
Type: article
URI: http://hdl.handle.net/2115/35584
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: 桜井 泰憲

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