Abstract
The present study is an attempt to integrate a behavior—genetic approach and methodology with the goals of sociobiology, using a life history analysis. The study seeks to determine (a) whether differences in reproduction-related behaviors show evidence of heritability; and (b) what factors contribute to observed variance in reproduction-related activities. In accordance with sociobiological theory, the reproduction-related behaviors of males were found to be more variably influenced by both heritable and environmental factors than those of females. The results also suggest, however, that while some reproduction-related behaviors are associated in a proximate sense with heritable personality and health-related factors, this association does not ultimately translate into predictable differences in total number of children.
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