Diel vertical movements by lotic mayfly nymphs under variable predation risk

1. The diel foraging periodicities of two grazing mayfly (Ephemeroptera) nymphs, Heptagenia dalecarlica and Baetis rhodani, under variable fish (European minnow) predation risk were examined in a series of laboratory experiments. 2. Heptagenia dalecarlica were almost exclusively nocturnal in their u...

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Veröffentlicht in:	Ecological entomology 1999-11, Vol.24 (4), p.443-449
Hauptverfasser:	Muotka, T, Huhta, A, Tikkanen, P
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal and plant ecology Animal, plant and microbial ecology Animals Baetidae Baetis Baetis rhodani Biological and medical sciences Demecology diel periodicity Ephemeroptera fish predation risk foraging Freshwater Fundamental and applied biological sciences. Psychology Heptagenia dalecarlica Heptageniidae mayfly nymphs movement nymphs periodicity Phoxinus phoxinus Pisces predation predation refuge predator avoidance predator-prey relationships Protozoa. Invertebrata refuge use risk species differences streams
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