生活履歴曲線による回遊魚群の解析-VI : 本州および九州の太平洋海域におけるアイワシの系統群

概要

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Adult individuals of sardine group caught in the pacific coast of Honshu were judged to be composed of five stocks (K•L•O•P and Q) mutually different in granographical peculiarity. The Boso peninsula makes a boundary between northern stocks (O•P and Q) and southern stocks (K and L). In the case of the south coastal waters of Kyushu there are three stocks L•M and N. Judged from the frequency of appearance, stocks K•L•M and N beared a close resemblance to stocks K•L•M and N, respectively, which have already been found as monopolistic constituents of catches of migrating sardine obtained from the coastal waters of Hokkaido. Through investigating the number of scale rings of the sardine caught in six monthes from June to December, we found that the fish in south coastal waters of Kyushu are only one year younger as compared with those in waters of Hokkaido.
公益社団法人日本水産学会の論文