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Individual Differences in Foraging Strategies of Parasitic Sabre-Tooth Blennies

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  • Andrea Bshary
  • Redouan Bshary

Abstract

Originally, evolutionary game theory typically predicted that optimal behaviour in a given situation is uniform or bimodal. However, the growing evidence that animals behave more variably while individuals may differ consistently in their behaviour, has led to the development of models that predict a distribution of strategies. Here we support the importance of such models in a study on a coral reef fish host–parasite system. Parasitic blennies (Plagiotremus sp.) regularly attack other fishes to bite off scales and mucus. Individuals of some victim species react to being bitten with punishing the parasite through aggressive chasing. Our field observations and laboratory experiments show that individual blennies differ markedly in how they incorporate being punished into their foraging decisions. We discuss how these differences may affect the payoff structure and hence the net effect of punishment on punishers and on the appearance of a public good for look-alikes.

Suggested Citation

  • Andrea Bshary & Redouan Bshary, 2012. "Individual Differences in Foraging Strategies of Parasitic Sabre-Tooth Blennies," PLOS ONE, Public Library of Science, vol. 7(9), pages 1-9, September.
    • Handle: RePEc:plo:pone00:0045998
    DOI: 10.1371/journal.pone.0045998
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    References listed on IDEAS

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