Fin-flicking behaviour: a visual antipredator alarm signal in a characin fish, Hemigrammus erythrozonus.


Glowlight tetras, Hemigrammus erythrozonus, show a conspicuous visual display ('fin flicking') upon detecting a conspecific chemical alarm signal (alarm pheromone). We conducted laboratory studies to test two, nonmutually exclusive hypotheses regarding the function of this behaviour. To test the hypothesis that fin flicking acts as a visual alarm signal to… (More)


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