Rohan M. Brooker, Geoffrey P. Jones and Philip L. Munday Within-colony feeding selectivity by a corallivorous reef fish: foraging to maximize reward? Ecology and Evolution 3
Foraging theory predicts that individuals should choose a prey that maximizes energy rewards relative to the energy expended to access, capture, and consume the prey. However, the relative roles of differences in the nutritive value of foods and costs associated with differences in prey accessibility are not always clear. Here we demonstrate that the corallivorous reef fish, Oxymonacanthus longirostris does not feed uniformly from coral colonies, but is selecting feeding positions with greater polyp accessibility, rather than those that are more nutritious.
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