Can possible evolutionary outcomes be determined directly from the population dynamics? [0.03%]
种群数量动态可以直接决定进化结果吗？
Andrew Hoyle,Roger G Bowers
Andrew Hoyle
Traditionally, to determine the possible evolutionary behaviour of an ecological system using adaptive dynamics, it is necessary to calculate the fitness and its derivatives at a singular point. We investigate the claim that the possible ev...
Absorption and fixation times for neutral and quasi-neutral populations with density dependence [0.03%]
具有密度制约的中性及类中性种群的吸收和固定时间
Todd L Parsons,Christopher Quince,Joshua B Plotkin
Todd L Parsons
We study a generalisation of Moran's population-genetic model that incorporates density dependence. Rather than assuming fixed population size, we allow the number of individuals to vary stochastically with the same events that change allel...
Population differentiation and migration: coalescence times in a two-sex island model for autosomal and X-linked loci [0.03%]
基于两性岛屿模型的群体分化和迁移：常染色体与X染色体位点的共祖时间研究
Sohini Ramachandran,Noah A Rosenberg,Marcus W Feldman et al.
Sohini Ramachandran et al.
Evolutionists have debated whether population-genetic parameters, such as effective population size and migration rate, differ between males and females. In humans, most analyses of this problem have focused on the Y chromosome and the mito...
Peter A Whigham,Grant C Dick,Hamish G Spencer
Peter A Whigham
Genetic drift in finite populations ultimately leads to the loss of genetic variation. This paper examines the rate of neutral gene loss for a range of population structures defined by a graph. We show that, where individuals reside at fixe...
Stochastic fluctuations in frequency-dependent selection: a one-locus, two-allele and two-phenotype model [0.03%]
频率依赖性选择中的随机波动：一个基因座两个等位基因和两种表现型的模型
Yi Tao,Ross Cressman,Boyu Zhang et al.
Yi Tao et al.
Stochastic fluctuations in a simple frequency-dependent selection model with one-locus, two-alleles and two-phenotypes are investigated. The steady-state statistics of allele frequencies for an interior stable phenotypic equilibrium are sho...
Refael Abta,Marcelo Schiffer,Avishag Ben-Ishay et al.
Refael Abta et al.
The stability of population oscillations in ecological systems is considered. Experiments suggest that in many cases the single patch dynamics of predator-prey or host-parasite systems is extinction prone, and stability is achieved only whe...
Maximization principles for frequency-dependent selection I: the one-locus two-allele case [0.03%]
频率依赖性选择的最大化原理I：单基因双等位基因情况
Kristan A Schneider
Kristan A Schneider
In this article we study the one-locus two-allele version of the pairwise-interaction model of frequency-dependent selection in discrete and continuous time. Our main aim is to provide necessary and sufficient conditions for the validity of...
Exact asymptotic analysis for metapopulation dynamics on correlated dynamic landscapes [0.03%]
相关动态景观上元人口动力学的精确渐近分析
Stephen J Cornell,Otso Ovaskainen
Stephen J Cornell
We compute the mean patch occupancy for a stochastic, spatially explicit patch-occupancy metapopulation model on a dynamic, correlated landscape, using a mathematically exact perturbation expansion about a mean-field limit that applies when...
Environmental variation, fluctuating selection and genetic drift in subdivided populations [0.03%]
环境变化、间歇选择及亚种群中的遗传漂变
Jesse E Taylor
Jesse E Taylor
Although there have many studies of the population genetical consequences of environmental variation, little is known about the combined effects of genetic drift and fluctuating selection in structured populations. Here we use diffusion the...
Joint stationary moments of a two-island diffusion model of population subdivision [0.03%]
两隔离群体扩散模型的平稳矩
Amir R R Kermany,Xiaowen Zhou,Donal A Hickey
Amir R R Kermany
An expression for joint stationary moments of a diffusion approximation to a generalized Wright-Fisher model, corresponding to two finite populations of equal sizes, with migration and mutation, is derived. This gives a complete description...