Temporal Estimates of Effective Population Size in Species With Overlapping Generations
Temporal Estimates of Effective Population Size in Species With Overlapping Generations
复制标题
世代重叠物种有效种群规模的时间估计
作者：
R. Waples;M. Yokota
估计有效种群数量(Ne)的标准时间方法假定世代是离散的，但它通常应用于世代重叠的物种。我们使用三个模式物种的模拟数据，评估了由于违反这一假设而导致的估计\Batchmode\Documentclass[fleqn，10pt，LegalPaper]{文章}\usepackage{amssymb}\usepackage{amsfonts}\usepackage{amsath}\Page Style{Empty}\Begin{Document}\({\hat{N}}_{\mathm{e}}\)\end{Document}中的偏差。我们验证了Felsenstein之前的一个建议，即根据生殖价值对个体进行加权是计算参数群体等位基因频率的正确方法，在这种情况下，年龄结构群体的变化率与离散世代模型预测的变化率一致。当标准时态方法应用于年龄结构物种时，典型的抽样制度(只对新生儿或成人抽样；对整个种群随机抽样)不会产生适当加权的等位基因频率，并导致有偏见的\Batchmode\Documentclass[fleqn，10pt，LegalPaper]{文章}\usepackage{amssymb}\usepackage{amsfonts}\usepackage{amsatics}\Page{Empty}\Begin{Document}\({\hat{N}}_{\matrm{e}}\)\end{Document}。偏差的方向和大小取决于采样方法和物种的生活史。以恒定速度增长(或下降)的种群的结果与恒定大小的种群的结果是平行的。如果有足够的人口学数据，并且满足一定的抽样限制，对时态法的Jorde-Ryman修正可以应用于任何世代重叠的物种。或者，与与年龄结构相关的采样偏差相比，间隔许多代的时间样本使漂移信号最大化。
The standard temporal method for estimating effective population size (Ne) assumes that generations are discrete, but it is routinely applied to species with overlapping generations. We evaluated bias in the estimates \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\hat{N}}_{\mathrm{e}}\) \end{document} caused by violation of this assumption, using simulated data for three model species: humans (type I survival), sparrow (type II), and barnacle (type III). We verify a previous proposal by Felsenstein that weighting individuals by reproductive value is the correct way to calculate parametric population allele frequencies, in which case the rate of change in age-structured populations conforms to that predicted by discrete-generation models. When the standard temporal method is applied to age-structured species, typical sampling regimes (sampling only newborns or adults; randomly sampling the entire population) do not yield properly weighted allele frequencies and result in biased \batchmode \documentclass[fleqn,10pt,legalpaper]{article} \usepackage{amssymb} \usepackage{amsfonts} \usepackage{amsmath} \pagestyle{empty} \begin{document} \({\hat{N}}_{\mathrm{e}}\) \end{document}. The direction and magnitude of the bias are shown to depend on the sampling method and the species' life history. Results for populations that grow (or decline) at a constant rate paralleled those for populations of constant size. If sufficient demographic data are available and certain sampling restrictions are met, the Jorde–Ryman modification of the temporal method can be applied to any species with overlapping generations. Alternatively, spacing the temporal samples many generations apart maximizes the drift signal compared to sampling biases associated with age structure.
使用最大似然根据等位基因频率的时间变化来估计种群大小。
影响因子：
3.3
作者：
Williamson,EG;Slatkin,M
通讯作者：
Slatkin,M
对时间间隔样本的 N(e) 的可能性进行蒙特卡罗评估。
影响因子：
3.3
作者：
Anderson,EC;Williamson,EG;Thompson,EA
通讯作者：
Thompson,EA