<研究報告>イソニナPisania ferreaの生活史(I) : 特に雌生殖腺の季節的変化について

概要

論文の詳細を見る
An observation has been made on the breeding of the whelk, Pisania ferrea, by microscopical examination on the female organs, sampling being obtained regulary at monthly intervals from February, 1965 to April 1966 from Shika Island, Hakata Bay, from which the following results have been obtained. 1. The size distribution of adult whelks in the population was from twenty one to thirty three millimeters in shell length, about twenty five in the majority. 2. Oogenesis begins in this gastropods in early July, and it seems possible that spawning takes place mainly during late spring and early summer. 3. It is begining to bring over the eosinophl yolk granules into ovum in October. These oval granules, peculiar in the Neogastropoda, increased in size and number with development of the oocytes.
福岡女子大学の論文
1968-09-30