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The Influence of Dispersal Pattern On the Evolution of Fecundity

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image of Netherlands Journal of Zoology
For more content, see Archives Néerlandaises de Zoologie (Vol 1-17) and Animal Biology (Vol 53 and onwards).

A model was made of the effect of natural selection on fecundity within species and fecundity differences between species on the dynamics of a population. The population has a life history involving one pool of freely dispersing random mating adults and many local groups of competing juveniles. The adults disperse over the patches of juvenile food, and lay one clutch of eggs in a patch. The resulting sib competition leads to maximization of relative fitness at an intermediate ("optimal") fecundity. This optimal fecundity does not necessarily lead to superiority in interspecific competition. At optimal fecundity neither number of adults nor number of juveniles will be maximized. This is a consequence of individual selection from adult to next geueration adult opposing selection from juvenile to juvenile.

Affiliations: 1: Department of Population and Evolutionary Biology, University of Utrecht, The Netherlands


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