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alternative responses to predation in two headwater stream minnows is reflected in their contrasting diel activity patterns.animals exhibit diel periodicity in their activity in part to meet energy requirements whilst evading predation. a competing hypothesis suggests that partitioning of diel activities is less important because animals capitalise on opportunity. to test these hypotheses we examined the diel activity patterns for two cyprinid minnows, chubbyhead barb barbus anoplus and the eastern cape redfin minnow pseudobarbus afer that both occur within headwater streams in the eastern cape, south africa. chubbyh ...201424691382
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