Does selection intensity increase when populations decrease? Absolute fitness, relative fitness, and the opportunity for selection

Autor:	John O. Reiss
Rok vydání:	2012
Předmět:	education.field_of_study Reproductive success Ecology Population Negative binomial distribution Variance (accounting) Biology Poisson distribution Genetic load symbols.namesake Animal ecology Statistics symbols education Ecology Evolution Behavior and Systematics Selection (genetic algorithm)
Zdroj:	Evolutionary Ecology. 27:477-488
ISSN:	1573-8477 0269-7653
DOI:	10.1007/s10682-012-9618-7
Popis:	The variance in relative fitness, commonly called the “opportunity for selection,” is a measure of the maximum amount of selection that can occur in a population. I review the relation between fitness variance and population growth, showing that fitness variance is higher during periods of population decline. This is true both for survival and for commonly used models for variable descendant number (Poisson, negative binomial, generalized Poisson). Empirical evidence suggests that not just the opportunity for selection but also the actual selection occurring is commonly greater during such periods of population reduction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a1b60db965376a5f841d49fc8f69bb8a https://doi.org/10.1007/s10682-012-9618-7 Zobrazit plný text záznamu Full text from SpringerLink