びわ湖における陸封型アユの変異性に関する研究 : I.発育初期の分布様式と体形変異について
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概要
- 論文の詳細を見る
The morphological development, growth and change in distribution pattern of the Ayu-fish in Lake Biwa were studied. In the earlier phases when the body form variation is not so clear, the distribution of the larvae is passively determined by water current. The differentiation in the body form starts with the further developed larvae and they aggregate around the subaqueous terrace. As the differentiation becomes clearer, the fish can be clbssified into two groups by their body form, i.e., the running water type and the standing water type. The former migrates toward the littoral area while the latter remains in the deeper part. The relation between morphological development and growth reverses itself at about this phase ; the fish of the running water type which have been "more developed but less grown" in the preceding phases become "less developed but more grown" in the subsequent phases, and vice versa with the fish of the standing water type.
- 日本生態学会の論文
- 1970-04-01