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MARINE ECOLOGY PROGRESS SERIES Mar Ecol Prog Ser
 

Summary: MARINE ECOLOGY PROGRESS SERIES
Mar Ecol Prog Ser
Vol. 240: 267271, 2002 Published September 12
INTRODUCTION
Group size and composition of predators are influ-
enced by diverse factors such as nature of prey, local-
ization of resources and social interactions (Alexander
1974, Heinsohn & Packer 1995). Two additional factors
thought to influence the group size and the group com-
position of predators are risk of predation and inter-
specific contests over food (Alexander 1974, Lima &
Dill 1990, Fanshawe & Fitzgibbon 1993). Dolphins are
marine predators that are preyed upon by certain
shark species and this predation pressure may influ-
ence dolphin behavior and distribution (Wells et al.
1980, Heithaus 2001). For instance, risk of predation by
tiger sharks Galeocerdo cuvieri appears to explain some
of the variability in habitat use, group size and repro-
ductive success of bottlenose dolphins Tursiops adun-
cus (Mann et al. 2000, Heithaus & Dill 2002). At the

  

Source: Acevedo, Alejandro - Department of Biology, Western Washington University

 

Collections: Environmental Sciences and Ecology