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噴火湾周辺海域におけるスケトウダラの漁場学的研究. IV, 餌料としての動物プランクトン分布の季節変化

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Title: 噴火湾周辺海域におけるスケトウダラの漁場学的研究. IV, 餌料としての動物プランクトン分布の季節変化
Other Titles: Ecological Studies on the Alaska Pollack in the Adjacent Waters of the Funka Bay, Hokkaido. IV, Seasonal Variations of Zooplankton Distribution in Food for the Alaska Pollack
Authors: 前田, 辰昭1 Browse this author
高橋, 豊美2 Browse this author
上野, 元一3 Browse this author
Authors(alt): Maeda, Tatsuaki1
Takahashi, Toyomi2
Ueno, Motokazu3
Issue Date: 1980
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: 46
Issue: 6
Start Page: 671
End Page: 674
Publisher DOI: 10.2331/suisan.46.671
Abstract: Euphausids, Amphipods and Copepods are important food organisms for the Alaska pollack in the adjacent waters of the Funka Bay. In this paper, the seasonal variations of distribution of these three crustacean groups were examined on the date obtained from the vertical hauls with a NORPAC net at six definite stations once each month from February 1974 to February 1975. (1) Euphausia pacifica of calyptopis and furcilia stages appeared at the inshore station of 50m depth with the inflow of the surface layer water of the Oyashio current in February and March. From July to September, the larger one of this species were predominant at the offshore stations (300-350m depth) where the tip of the bottom layer water of the Oyashio current existed, and became most abundant in the same stations with the access of the mixed water mass of the Tsugaru warm current and the Oyashio mid water current in December and January. (2) Amphipods, mainly Parathemisto japonica, were abundant in the offshore stations in March-April and July-August. Their seasonal distribution showed approximately a similar trend to that of E. pacifica. (3) Pseudocalanus minutus of small size in the Copepods group appeared at the inshore station from March to May. Calanus cristatus, C. plumchrus and Eucalanus bungii bungii were chiefly distributed at the offshore stations (300-400m depth). Their abundance increased from February to May and decreased from August to September. (4) There is a large variation in the abundance of distribution of these crustacean groups during some years in the abundance of the Alaska pollack, suggesting that the feeding ecology of the Alaska pollack also varies widely with the availability of these food organisms.
Rights: © 1980 公益社団法人日本水産学会
© 1980 The Japanese Society of Fisheries Science
Type: article
URI: http://hdl.handle.net/2115/38571
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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