著者

末廣 恭雄

出版者

公益社団法人 日本水産学会

雑誌

日本水産学会誌 (ISSN:00215392)

巻号頁・発行日

vol.2, no.6, pp.307-311, 1934-03-15 (Released:2008-02-29)

参考文献数

10

被引用文献数

1 1

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It is well known that fishes while jostling in the fishing net vomit their taken food during the manipulation of the fishing. Whether this vomiting is simply a mechanical disgorging due to the violent jostle of the fish in the net, or a real vomiting produced by the excitement of the nervous vomiting center as is observable in the case of higher vertebrates, is still unknown. Indeed, it has not yet been proved, whether the low class vertebrate, such as the fish, has the vomiting center, or not. The writer used apomorphine hydrochloride to test if fishes react to the emetic. 0.2-1.0 c.c. of its 0.5% solution was injected into the body cavity of various sea fishes, to which sufficient food had previously been given. The reaction was extremely remarkable; almost all the fishes thus treated vomited entirely their stomach contents soon after the injection of the emetic. The control experiment was also done by the injection of the distilled water. Negative reaction was, however, obtained. Since, thus, apomorphine hydrochloride is equally applicable as an emetic to the fish and it is the stimulant of the vomiting center in the higher vertebrates, the writer makes suggestion on the existence of the vomiting center in the fish.