The daily activity patterns of mayfly nymphs (Ephemeroptera)
作者： J. M. Elliott
DOI: 10.1111/J.1469-7998.1968.TB03039.X
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摘要: Nymphs of Baetis rhodani (Pictet), Ephemerella ignita (Poda), Ecdyonurus venosus (Fabricius), Rhithrogena semicolorata (Curtis), and Heptagenia lateralis (Curtis) showed a similar endogenous rhythm activity under conditions natural illumination, continuous light darkness; were most active at night when they moved from the lower to upper surface stone. The nymphs positively thigmotactic negatively phototactic in flowing water, but these taxes all species except changed markedly flow water ceased.
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