ヨシノボリとカワヨシノボリの分布-I : 湖と池の付近について

概要

論文の詳細を見る
From the examination on the specimens collected from three lakes and 20 ponds, it was considered that Tukugobius flumineus is not able to inhabit in lakes and ponds. This consideration was corroborated by the examination on the specimens collected in Sarutani Reservoir as well as in Lake Suwa-ko. In a river, as has previously been reported, this fish inhabits mainly in the tributaries or in the middle and upper courses of main streams, while in the middle and lower courses, Rhinogobius brunneus is generally abundant. It was newly added in this report that also in a tributary flowing into lakes of high altitude, above-mentioned situations were presented again. Only by way of reference, the author wishes to touch upon next matters which were previously reported by the same author. R. brunneus spawns a great number of small eggs, from which swimming larvae hatch, and send amphidromous or lacustrine life. On the contrary, T. flumineus spawns a small number of large eggs, in which their swimming stages are passed, and spend fluvial life. Though they are certainly distinguishable externally by the number of pectoral fin rays, they are considered to be closely related.
日本生態学会の論文
1963-12-01