日本産ガンギエヒ科魚類の研究(第3報) : 東支那海産イサゴガンギエヒ(Raja hollandi JORDAN et RICHARDSON)の年齡査定
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In the present instalment 186 individuals of as kate, Raja hollandi Jordan et Richardson, which were taken during three seasons in 1950, were analysed by the same method as given in my previous report, and obtained nearly the same results. Namely, the calcified rings of the centrums are considered as the annual rings of the skate, which should be formed during the winter.