Sutdies on the Stock of Hokkaido Herring:II. Solar-index and Amount of Brood

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概要

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• If we examine the relation between the Solar-index (related to number of Sun-Spots) and the amount of brood of the herring, calculated by the age composition, it is found that during 1907 ?? 1927 they varied together, but that after 1927, this parallelism was not so obvious. Further, if we take the yearly catch of 1870 ?? 1906 (of which we have no date on age composition) into account, we see that the calculated amount of brood is poor in every third of the periods of Sun-Spots.

• 社団法人 日本水産学会の論文

著者

• 川名 武

  水産試驗場

関連論文

• Sutdies on the Stock of Hokkaido Herring:II. Solar-index and Amount of Brood

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