ゲンジボタル上陸幼虫の体型変異について
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概要
- 論文の詳細を見る
The size variations of the climbing larvae were investigated in the Kiyotaki River, Kyoto, Japan, from April to May, 1976-1978. The weight, the length, and the relative condition factor decreased as the season advanced. Just before the larval climbing season, almost all of the larvae to the warer seemed to have enough weight to do climbing. Among them, the larger larvae seemed to do climbing first. In the laboratory, the emergence rate of the climbing larvae decreased under 16℃ as the season advanced and increased under 20℃. The larger and/or stouter larvae showed a high emergence rate at 16℃ and the smaller and/or leaner ones showed a higher rate at 20℃. These results suggested that the larger and/or stouter larvae which did climbing early in the season were adaptive to the lower temperature, and that the smaller and/or leaner larvae which did climbing late in the season were adaptive to the higher temperature. The size variation is an important quality within a population for L.cruciata which has an unique behavior of leaving the water to pupate only on the rainy nights in late spring when the air temperature rises steadily.
- 日本生態学会の論文
- 1981-03-30