石狩川のサケの二三の魚群と脊椎骨數及びウロコの数について

概要

論文の詳細を見る
In the mean number of vertebrae and lateral-line scales, the salmon of the main river and a tributary, Toyohira River fairly exceed those of another tributary, Chitose River: and the the mean number of vertebrae of the fry of naturally reared populations in the main river is more than that of the fry which were produced in the hatcheries (Chitose and Otoe). Without regard to the effect of any factor, the salmon of Ishikari River System constitute two populations at least, which are different from each other, and so, evidence available indicates that the mature salmon mostly ascend the home river in which they were yielded, during their spawning migration.
公益社団法人日本水産学会の論文