MIYOSI1) has detected that winter rings of the scales of Kamchatka silver salmon can be classified into two kinds, of broad and of narrow zones. The same can be classified dichoto-mously in another way, according to the density, or the number per unit length, of the circuli in each winter zone. Statistical examination as to the rate of coincidence of the broad winter zone to the case of denser circuli, showed local variation to a certain extent.
Nippon Suisan Gakkaishi is an official journal of the Japanese Society of Fisheries Science written in Japanese only. The society publishes an English journal, Fisheries Science, as well, which accepts submissions from non-members of the society over the world. Detailed information is available in http://jsfs.jp/en/journals/fisheries-science.
