Abstract

We investigated the effect of fishing on the behavior and abundance of the cleaner fish Labroides dimidiatus on the Great Barrier Reef, Australia, by comparing cleaner fish density (underwater visual census) and behavior (focal animal observations) at a fished and a no-take site. Cleaner fish density, as well as the number of individuals and species cleaned, did not differ significantly between sites; however, L. dimidiatus spent more time interacting (physical contact involving feeding bites) with individual clients at the no-take site, indicating that fishing can indirectly affect mutualistic interactions on tropical reefs.

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