北海道〓資源の研究-〔第3報〕-尾の親魚より育つ稚魚数-
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概要
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The ratio of the number of the young herrings to that of their parents (calculated by the. study of age-composition) is 0.05-4.3, the mean value being ca. 1. Even in those years when plentiful year-classes were produced, the ratio is 2-3. If the number of the parents diminishes, the ratio becomes larger.
- 社団法人 日本水産学会の論文