Sun-spots and Breeding as well as Yield of the Herring, Clupea pallasii Cuvier & Valenciennes
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概要
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The results of age determinations from 1910 to 1930, show that the breeding of Clupea pallasii in Hokkaidô is poor without exception in the year of either maximum or minimum sun-spots and has a peak in each intermediate period, while the 65 years' statistics show that in extreme cases of sun-spots the yearly catch is often unusually rich or poor.
- 社団法人 日本水産学会の論文