生活履歴曲線による回遊魚群の解析-I : 日本海におけるマイワシの系統群

概要

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1. Estimating the percentage of the frequency of appearance of scale rings each having particular 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” was established for sardine individuals caught by a run of drift-gill-net fishery. 2. For sardine samples obtained in 1951-1956 on the coast of the Japan Sea (see Table 1), the life record curves were drawn according to the above procedure (see Fig. 1), which indicated as a general tendency that sardine of Yamaguchi type and Akita type intermingle in the central area between these two extremes. The results presented in this paper are supported by other biological informations obtained so far. 3. The life record curve is expected to be a useful method for quantitative studies of, for example migration of fish.
公益社団法人日本水産学会の論文