Evol Ecol Res 3: 611-632 (2001)     Full PDF if your library subscribes.

Trade-offs between growth and mortality and the maintenance of individual variation in growth

Marc Mangel1 and Judy Stamps2

1Department of Environmental Studies and Institute of Marine Sciences, University of California, Santa Cruz, CA 95064 and 2Section of Evolution and Ecology, University of California, Davis, CA 95616, USA

Author to whom all correspondence should be addressed.
e-mail: msmangel@cats.ucsc.edu


Trade-offs between growth and mortality can occur for a variety of reasons. These include foraging and predation risk, growth and mature function, growth and somatic development, growth and immune function, or growth and resistance to physiological stressors. We use a simple life-history model to show how individual trade-offs between growth and mortality can lead to the maintenance of individual variation in growth rates through nearly equal fitness (solution of the Euler-Lotka equation) for individuals growing at different rates. We explore these consequences for the relationships between other life-history variables.

Keywords: fitness, growth, individual variation, maturity, mortality, trade-offs.

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