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

ABSTRACT

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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