渓流におけるサケ科魚類の生態 : I, 渓流における餌生物の存在状態とイワナの食性
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概要
- 論文の詳細を見る
The divergence of feeding habit in relation to fish size and the food animals' environment was studied for stream resident Japanese charr. It is suggested that the enormous amounts of nocturnal drift represents an unavailable food resource, because most charr are diurnal feeders. In the daytime drift, fallen animals exceeded benthic ones. Benthophagus area seems to be calm area where the benthos was not abundant and in this condition, larger charr tends to feed on fallen animals.
- 日本生態学会の論文
- 1985-12-30