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  • Title: Cleaner fish use tactile dancing behavior as a preconflict management strategy.
    Author: Grutter AS.
    Journal: Curr Biol; 2004 Jun 22; 14(12):1080-3. PubMed ID: 15203000.
    Abstract:
    The most commonly asked question about cooperative interactions is how they are maintained when cheating is theoretically more profitable. In cleaning interactions, where cleaners remove parasites from apparently cooperating clients, the classical question asked is why cleaner fish can clean piscivorous client fish without being eaten, a problem Trivers used to explain reciprocal altruism. Trivers suggested that predators refrain from eating cleaners only when the repeated removal of parasites by a particular cleaner results in a greater benefit than eating the cleaner. Although several theoretical models have examined cheating behavior in clients, no empirical tests have been done (but see Darcy ). It has been observed that cleaners are susceptible to predation. Thus, cleaners should have evolved strategies to avoid conflict or being eaten. In primates, conflicts are often resolved with conflict or preconflict management behavior. Here, I show that cleaner fish tactically stimulate clients while swimming in an oscillating "dancing" manner (tactile dancing) more when exposed to hungry piscivorous clients than satiated ones, regardless of the client's parasite load. Tactile dancing thus may function as a preconflict management strategy that enables cleaner fish to avoid conflict with potentially "dangerous" clients.
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