---
_id: '3630'
abstract:
- lang: eng
text: 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 of ways.
At a demographic equilibrium, Ne can be derived from the demography by combining
information about the ultimate contribution of each deme to the future genetic
make-up of the population and Wright's FST's. The effective size is given by Ne
= 1/(1 + var (upsilon) ((1 - FST)/Nin), where n is the number of demes, theta
i is the eventual contribution of individuals in deme i to the whole population
(scaled such that sigma theta i = n), and < > denotes an average weighted
by theta i. This formula is applied to a catastrophic extinction model (where
sites are either empty or at carrying capacity) and to a metapopulation model
with explicit dynamics, where extinction is caused by demographic stochasticity
and by chaos. Contrary to the expectation from the standard island model, the
usual effect of population subdivision is to decrease the effective size relative
to a panmictic population living on the same resource.
author:
- first_name: Michael
full_name: Whitlock, Michael
last_name: Whitlock
- first_name: Nicholas H
full_name: Nicholas Barton
id: 4880FE40-F248-11E8-B48F-1D18A9856A87
last_name: Barton
orcid: 0000-0002-8548-5240
citation:
ama: Whitlock M, Barton NH. The effective size of a subdivided population. *Genetics*.
1997;146(1):427-441.
apa: Whitlock, M., & Barton, N. H. (1997). The effective size of a subdivided
population. *Genetics*. Genetics Society of America.
chicago: Whitlock, Michael, and Nicholas H Barton. “The Effective Size of a Subdivided
Population.” *Genetics*. Genetics Society of America, 1997.
ieee: M. Whitlock and N. H. Barton, “The effective size of a subdivided population,”
*Genetics*, vol. 146, no. 1. Genetics Society of America, pp. 427–441, 1997.
ista: Whitlock M, Barton NH. 1997. The effective size of a subdivided population.
Genetics. 146(1), 427–441.
mla: Whitlock, Michael, and Nicholas H. Barton. “The Effective Size of a Subdivided
Population.” *Genetics*, vol. 146, no. 1, Genetics Society of America, 1997,
pp. 427–41.
short: M. Whitlock, N.H. Barton, Genetics 146 (1997) 427–441.
date_created: 2018-12-11T12:04:20Z
date_published: 1997-05-01T00:00:00Z
date_updated: 2021-01-12T07:44:47Z
day: '01'
extern: 1
intvolume: ' 146'
issue: '1'
month: '05'
page: 427 - 441
publication: Genetics
publication_status: published
publisher: Genetics Society of America
publist_id: '2753'
quality_controlled: 0
status: public
title: The effective size of a subdivided population
type: journal_article
volume: 146
year: '1997'
...