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Price equation. In the theory of evolution and natural selection, the Price equation (also known as Price's equation or Price's theorem) describes how a trait or allele changes in frequency over time. The equation uses a covariance between a trait and fitness, to give a mathematical description of evolution and natural selection.
Evolutionary biology. Fitness (often denoted or ω in population genetics models) is a quantitative representation of individual reproductive success. It is also equal to the average contribution to the gene pool of the next generation, made by the same individuals of the specified genotype or phenotype. Fitness can be defined either with ...
Biological cost. In biology, the biological cost or metabolic price is a measure of the increased energy metabolism that is required to achieve a function. Drug resistance in microbiology, for instance, has a very high metabolic price, [1] especially for antibiotic resistance.
Article indices. v. t. e. In microeconomics, economies of scale are the cost advantages that enterprises obtain due to their scale of operation, and are typically measured by the amount of output produced per unit of time. A decrease in cost per unit of output enables an increase in scale that is, increased production with lowered cost. [1]
Evolutionary biology. In population genetics, a selection coefficient, usually denoted by the letter s, is a measure of differences in relative fitness. Selection coefficients are central to the quantitative description of evolution, since fitness differences determine the change in genotype frequencies attributable to selection .
An evolutionarily stable state is a dynamic property of a population that returns to using a strategy, or mix of strategies, if it is perturbed from that initial state. It is part of population genetics, dynamical system, or evolutionary game theory. This is now called convergent stability. [ 11]
The cost of reproduction hypothesis posits that reproduction (and increased reproductive effort) is costly in terms of future survival and reproduction. [1] These costs may be exacerbated in certain organisms, such as first--time breeders. [2] Along with the idea that organisms are selected to maximize lifetime reproductive success, [3] this ...
The retail format (also known as the retail formula) influences the consumer's store choice and addresses the consumer's expectations. At its most basic level, a retail format is a simple marketplace, that is; a location where goods and services are exchanged. In some parts of the world, the retail sector is still dominated by small family-run ...