The Journal of Heredity 2001:92(2)
© 2001 The American Genetic Association 92:198-205
The Evolution of Alternative Reproductive Strategies: Fitness Differential, Heritability, and Genetic Correlation Between the Sexes
From the Department of Ecology and Evolutionary Biology, University of California, Santa Cruz, California (Sinervo) and Department of Ecology and Evolutionary Biology, E209 Corson Hall, Cornell University, Ithaca, NY 14853 (Zamudio).
Address correspondence to Kelly R. Zamudio at the address above or e-mail: krz2;cacornell.edu.
Paternity analyses using molecular markers have become standard in studies of mating systems, parentage, and kinship. In systems where individuals exhibit alternative mating strategies, molecular analyses have been productively used to estimate the reproductive success of each behavioral type and hence the fitness consequences to each individual. Here we review the fitness results in a system of five alternative mating strategies present in one population of side-blotched lizards (Uta stansburiana). Males in this population adopt one of three behavioral strategies that differ in their degree of territoriality and mate guarding. In contrast, females adopt one of two strategies that differ in offspring quantity and quality. We use paternity analyses to estimate the fitness of each morph, the heritability of reproductive strategy, and the correlation in strategy between the sexes and discuss the implications of our findings for the evolution and maintenance of reproductive polymorphism in this and other systems.
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