ドチザメの螺旋腸内における成虫の消長について (養殖ハマチに寄生する嚢虫に関する研究-10,11-)

概要

論文の詳細を見る
Studies were made on the growth of adult Callotetrarhynchus sp. in the valvular intestine of Triakis scyllia, a kind of requiem shark, which was demonstrated by a previous study to be a suitable experimental final host for this cestode. Parasitefree sharks were prepared by raising juveniles at the Himeji City Aquarium. Twenty bladder worms collected from the body cavity of Seriola quinqueradiata were introduced into each shark by a catheter into the stomach. The sharks examined for the number of adults and for the growth of the cestode from 2 to 80 days after administration. From the experiment the following conolusions were reached: 1) The adult of Callotetrarhynchus sp. was thought to be harmful to the host. Of the 35 sharks, 12 died during the course of the experiment. The dying animals always showed an abnormal movement a few days before death and severe intestinal inflammation was observed in all the dying or dead sharks. 2) The adult stage, which could continue to grow without killing the host, was limited in number. The number of adults varied with the size of the valvular intestine and with the growth of the adult. 3) In the valvular intestines of normal sharks, the post-holdfast zone of the adult parasite stretched rapidly and then segmentation started. Adults matured in about 15 days after administration at temperatures of 21.8-26.5°C. At the same time, free proglottides were found to be separated from the strobilae. All gravid proglottides moved to the outside through the anus within 40 days. Most of the adults died in the valvular intestine after about 25 days and were discharged one by one.
日本水産學會の論文

ドチザメの螺旋腸内における成虫の消長について (養殖ハマチに寄生する嚢虫に関する研究-10,11-)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク