イソカニムシにおける胚および幼生の哺育の様式ならびに哺育段階について

抄録

Six stages of breeding for the embryos and larvae in Garypus japonicus were described in order. The breeding phenomenon was studied anatomically and histologically from the viewpoint of a nutritive connection between the mother and the embryos or larvae. The nutritive connection seemed to consist of three processes, viz. the secretion of the nutritive fluid from the ovarian epithelial cells into the ovarian lumen, the transportation of the fluid from the lumen into the brood sac, and the ingestion of the fluid by the embryos and larvae in the brood sac. Although these three processes progressed in different sites and by different manners, some functional and periodical correspondences were found both between the secretory and the transportating processes and between the transportating and the ingesting processes. Hence, the transportating process was regarded as connecting functionally and periodically the other two processes and effectuating the nutritive connection in G. japonicus. Based mainly on these orrespondences, the six stages of breeding were able to be established.