Anderson W W, King C E
Proc Natl Acad Sci U S A. 1970 Jul;66(3):780-6. doi: 10.1073/pnas.66.3.780.
A model is presented for age-specific selection on the genotypes in a population. Each genotype is assigned a life table that specifies the viability and fecundity of its age classes. Breeding and reproduction occur at regular intervals, and generations overlap. Examples were generated on a digital computer. Gene frequencies and the distribution of individuals among the various age classes may oscillate until equilibrium is reached. Moreover, age structure and gene frequencies are intimately related; a change in either factor alone may bring about a change in the other. In an extension of the basic model, the fecundities of the genotypes were regulated by population density. Under the joint action of logistic control and age-specific selection, the growth curve of the population can, for some schedules of selection, show plateaus in an otherwise sigmoid increase. The relevance of the growth patterns obtained in different types of environments to current ideas of "r" and "K" selection is discussed.
提出了一种针对群体中基因型的年龄特异性选择模型。为每种基因型分配一个生命表，该生命表规定了其各年龄组的生存能力和繁殖力。繁殖定期发生，世代重叠。在数字计算机上生成了示例。基因频率和个体在不同年龄组中的分布可能会振荡，直到达到平衡。此外，年龄结构和基因频率密切相关；任何一个因素的变化都可能导致另一个因素的变化。在基本模型的扩展中，基因型的繁殖力受种群密度调节。在逻辑控制和年龄特异性选择的共同作用下，对于某些选择方案，种群的增长曲线在原本呈S形增长的情况下可能会出现平稳期。讨论了在不同类型环境中获得的增长模式与当前“r”和“K”选择概念的相关性。
