移殖環境の相異による公魚の変異

概要

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Comparative studies have been made on the pondsmelt, H pomesus olidus, in Lake Sinji and on certain other groups of fishes of the same species, which were transplanted from Lake Sinji to Lake Koyama (Tottori Pref.), Lake Senkari (Hyogo Pref.), Lake Miike (Miyazaki Pref.) and Lake Unagiike (Kagoshima Pref.). In the mentioned lakes the transplanted fishes have been subjected to various environments for twenty generations. The water temperature differed in lake during the early stage of development of the fishes. The salinity in Lake Koyama during that period is slightly higher than in the other lakes. For such reasons it was first presumed that the vertebral number of the fish may vary in each group, as in the cases studied so far by many investigators. However, the result of our studies revealed almost no difference in the vertebral number. Also no difference was found in the morphology, as reported by Dr. FUJITA (1926) who made a comparative study on the fishes in Lakes Kasumigaura and Suwa.
日本生態学会の論文
1955-10-31