We studied antipredatory responses of lotic mayfly (Baetis) nymphs in a factorial experiment with four levels of fish presence: (1) a freely foraging fish (the European minnow, Phoxinus phoxinus), (2) ...

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BABAK and Foustka 1 were able to show that the movements of the gills of ephemerid nymphs were dependent on the oxygen tension of the water. Later, Dodds and Hisaw 2 demonstrated a relation between ...