Morphology of Early Instar Larvae and Life History of Ephoron eophilum(Ephemeroptera: Polymitarcyidae).
スポンサーリンク
概要
- 論文の詳細を見る
The life history of a burrowing mayfly, Ephoron eophilum ISHIWATA, was studied in the Kinu River, Ibaraki Prefecture, Japan, which a congener E. shigae (TAKAHASHI), inhabits sympatrically. E. eophilum had a univoltine life cycle. First instar larvae were found during the long period from April to July, and adults appeared from July to October, which is in contrast to the more syncronous life history pattern of E. shigae. Another distinct difference between these two species is the diurnal timing of the emergence of imagos and subimagos : E. shigae emerged after sunset, while E. eophilum emerged at early dawn. E. eophilum females had fewer (352-1863) larger (0.25 mm in diameter) eggs than E. shigae females which had as many as 634-3420 eggs 0.16 mm in diameter. Hatchings of E. eophilum were larger in body size than those of E. shigae, and had well developed mandibles which may be adapted to life in harder clay stream beds.
- 日本陸水学会の論文
日本陸水学会 | 論文
- キイロカワカゲロウの孵化におよぼす水温の影響〔英文〕
- キイロカワカゲロウ羽化の経日・日周変化〔英文〕
- Studies on Taxonomy and Distribution of the Freshwater Snails,Genus,Semisulcospia in the Three Islands inside Lake Biwa
- びわ湖南湖におけるタテヒダカワニナおよびカゴメカワニナの分布とその決定要因について
- ちりとり型金綱による河川底生動物採集上の問題点