Effective population size/adult population size ratios in wildlife: a review
نویسندگان
چکیده
منابع مشابه
Effective population size/adult population size ratios in wildlife: a review.
The effective population size is required to predict the rate of inbreeding and loss of genetic variation in wildlife. Since only census population size is normally available, it is critical to know the ratio of effective to actual population size (NJN). Published estimates of NJN (192 from 102 species) were analysed to identify major variables affecting the ratio, and to obtain a comprehensive...
متن کاملEffective population size
What is it? An aid to calculation in population genetics, introduced by Sewall Wright. The rate of change of the genetic make-up of a population by genetic drift — fluctuations in allele frequencies caused by random sampling — is inversely related to the effective population size, Ne. Ne is measured with reference to an ideal ‘Wright–Fisher’ population. This has a fixed number of N diploid bree...
متن کاملThe effective size of a subdivided population.
This paper derives the long-term effective size, Ne, for a general model of population subdivision, allowing for differential deme fitness, variable emigration and immigration rates, extinction, colonization, and correlations across generations in these processes. We show that various long-term measures of Ne are equivalent. The effective size of a metapopulation can be expressed in a variety o...
متن کاملThe Genetic Effective Size of a Population
Throughout the preceding chapter, we assumed a population with an idealized set of Wright-Fisher features, including random mating within a homogeneous group of monoecious, self-compatible individuals with equal expected family sizes, discrete generations, and an absence of density fluctuations. Because almost all populations deviate from this ideal structure in one or more ways, and often subs...
متن کاملEffective population size and population subdivision in demographically structured populations.
A fast-timescale approximation is applied to the coalescent process in a single population, which is demographically structured by sex and/or age. This provides a general expression for the probability that a pair of alleles sampled from the population coalesce in the previous time interval. The effective population size is defined as the reciprocal of twice the product of generation time and t...
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ژورنال
عنوان ژورنال: Genetical Research
سال: 1995
ISSN: 0016-6723,1469-5073
DOI: 10.1017/s0016672300034455