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© 1992 International Society for Behavioral Ecology

research-article

Tendency to inspect predators predicts mortality risk in the guppy (Poecilia reticulata)

Lee Alan Dugatkin

Department of Biology P.O. Box 6000 State University of New York at Binghamton Binghamton, NY 13902–6000, USA

ABSTRACT

Although predator inspection behavior in fishes has become a model system for examining game theoretical strategies such as Tit for Tat, the direct costs of inspection behavior have not been quantified. To begin quantifying such costs, I conducted an experiment that examined mortality due to predation as a function of predator inspection in the guppy (Poecilia reticulata). Before being subjected to a "survivorship" experiment, guppies were assayed for their tendency to inspect a predator. Groups were then composed of six guppies that differed in their tendency to inspect. These groups were placed into a pool containing a predator, and survivorship of guppies with different inspection tendencies was noted 36 and 60 h later. Results indicate that individuals that display high degrees of inspection behavior suffer greater mortality than their noninspecting shoalmates.


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