生活履歴曲線による回遊魚群の解析-VII

1938～'48年のマイワシの系統群にいて

抄録

Estimating the percentage of the freqeuncy of appearance of scale rings each having par-ticular enclosures, the percentage was plotted against the so-called back calculated body-length, i.e., the body length of fish assessed for the time of scale ring, so that a curve which is herein referred to as “life record curve ”.
Adult individuals of sardine group caught in coastal waters of Japan in 1938 ?? '48 (Table 1) were judged to be composed of four stocks (K. L. A and C) mutually different in grano-graphical peculiarity (Fig. 1).