北海道西岸日本海におけるスケトウダラ漁獲量の多変量解析と系群構造
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概要
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The population structure of walleye pollock Theragra chalcogramma in the Japan Sea coast of Hokkaido was examined on the basis of multivariate analysis of commercial catches from the four main fishing grounds during 1970 to 1988. The cluster analysis showed two clusters of this species in this area, and the multifactor analysis showed two independent factors on both sides of the Shakotan peninsula. On the basis of the previous analysis on the number of vertebrae data during 1950 and 1973 and the results obtained in this paper, we propose that there were two populations of this species in this area.
- 日本水産學會の論文