Hauling field gear up Gothic Mountain…
Nocturnal drift of stream invertebrates is examined as a predator avoidance adaptation via the hypothesis that those taxa or growth stages which are large, and thus subject to intense predation relative to smaller forms, should be most strongly constrained to nocturnal drift activity. Smaller taxa or stages may be aperiodic or day active. Data from an alpine stream document for the abundant and widespread mayfly Baetis bicaudatus that, on a continuum from small to large size, the risk of predation increases while the propensity to drift during the day decreases. There is supporting and some contrary evidence from the literature for the generality of this pattern.
Knowledge graph centered on Trout predation and the size composition of stream with 8 nodes and 20 connections. Top connected: Life histories and the strengths of species intera, Emergence cues of a mayfly in a high-altitude stre, The influence of predatory fish on mayfly drift: e, Baetis, Baetis bicaudatus.
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