Sexual selection and the evolution of mating systems
Mating system theory, based on economics of territorial defense, has been applied to describe the diversity in social systems across taxa. Mating systems play a critical role in genetic, demographic, and social dynamics of populations. Early models explaining mating system diversity emphasized links between resource and mate monopolization. These economic models favored largely extrinsic factors in explaining mating system evolution, but they did not explicitly consider intrinsic genetic factors that drive mating system evolution, nor the likelihood of transitions between mating system states. Mating systems generate strong sexual selection favoring the evolution of genetic alternative strategies, or plastic strategies that depend on social context or individual condition. By influencing space use, genetic mechanisms complement ecological approaches, but they could also shape mating system evolution independent of ecology.
Robert L. Smith, P. He worked in electrical construction for more than 20 years. Smith has frequently lectured on the application of the National Electrical Code.
Archives of Sexual Behavior. Sperm competition occurs when the ejaculate of two or more males is simultaneously present in the reproductive tract of females. Consequently, sperm competition can only occur in mating systems where females are sexually promiscuous. In species where sperm competition is intense, selection will favor the evolution of adaptations that maximize the production and efficient delivery of sperm.