منابع مشابه
Natural selection and density-dependent population growth.
Natural selection was studied in the context of density-dependent population growth using a single locus, continuous time model for the rates of change of population size and allele frequency. The maximization principle of density-dependent selection was applied to a class of fitness expressions with explicit recruitment and mortality terms. Three general results were obtained: First, at low po...
متن کاملNatural selection and fitness entropy in a density-regulated population.
The entropy H(p(o),p*) of a population with the initial allele frequency p(o) given the equilibrium polymorphic frequency p* has been proposed as a measure of natural selection. In the present paper, we have extended this concept to include a particular aspect of density-dependent selection. We compared size trajectory of a population initially at genetic equilibrium, N(t), with the size trajec...
متن کاملThe Evolution of Color Polymorphism: Crypticity, Searching Images, and Apostatic Selection
The development and maintenance of color polymorphism in cryptic prey species is a source of enduring fascination, in part because it appears to result from selective processes operating across multiple levels of analysis, ranging from cognitive psychology to population ecology. Since the 1960s, prey species with diverse phenotypes have been viewed as the evolved reflection of the perceptual an...
متن کاملThe evolution of plumage polymorphism in birds of prey and owls: the apostatic selection hypothesis revisited.
Co-evolution between phenotypic variation and other traits is of paramount importance for our understanding of the origin and maintenance of polymorphism in natural populations. We tested whether the evolution of plumage polymorphism in birds of prey and owls was supported by the apostatic selection hypothesis using ecological and life-history variables in birds of prey and owls and performing ...
متن کاملDynamics of density - and frequency - dependent selection ( population genetics / ecology / evolution / population regulation )
The evolution of a multiallelic locus in a diploid monoecious population is investigated for weak selection in both discrete and continuous time. It is assumed that in the absence of selection the rate of change of population size N is a function only of N, and Nconyerges exponentially to a unique, globally stable equilibrium, N. With arbitrary densityand frequency-dependent selection, after se...
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ژورنال
عنوان ژورنال: Heredity
سال: 1969
ISSN: 0018-067X,1365-2540
DOI: 10.1038/hdy.1969.15