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首页> 外文学位 >Ground-truthing effective population size estimators using long-term population data from inland salmonid populations
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Ground-truthing effective population size estimators using long-term population data from inland salmonid populations

机译：使用来自内陆鲑鱼种群的长期种群数据，进行真实的有效种群规模估计

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摘要

Effective population size (Ne) is a foundational concept in conservation biology, in part due to its relationship to the adaptive potential of populations. Although Ne is often estimated for wild populations, it is rarely calibrated against actual population estimates (Nc) other than to produce Ne/Nc ratios. This project used demographic and genetic data for from two intensively-studied populations of lake trout (Salvelinus namaycush) in Ontario's Experimental Lake Area (ELA) as baseline data for evaluating the performance of multiple Ne estimators. Several temporal and single-time (point) genetic methods of estimating Ne were compared against demographic Ne estimates and known population data, as well as variation and consistency within and among Ne estimators. Changes in genetic Ne estimates over time were also compared to changes in demographic structure and fluctuating census estimates, including the effect of an experimentally manipulated population bottleneck on demographic and genetic Ne estimates during population reduction and recovery. Sampling years that included the most pre-, during and post-bottleneck data revealed the lowest estimates using temporal estimators (Ne = 16 to 18) despite pre- and post-bottleneck census estimates of 591 and 565. Estimation of Ne had increasingly tighter confidence intervals as sample sizes approached the actual number of breeding individuals in each population. Performance differences among the tested estimators highlight their potential biases and reliance on different assumptions, illustrating their potential value and caveats for assessing adaptive potential of wild populations.
机译：有效种群规模（Ne）是保护生物学的基本概念，部分原因是其与种群适应潜力的关系。尽管通常针对野生种群估算Ne，但除产生Ne / Nc比率外，很少根据实际种群估算（Nc）进行校准。该项目使用安大略省实验湖区（ELA）中两个经过深入研究的鳟鱼种群（Salvelinus namaycush）的人口统计学和遗传数据，作为评估多个Ne估计量性能的基准数据。将几种估算Ne的时间和单次（点）遗传方法与人口统计Ne估算和已知的人口数据进行了比较，并比较了Ne估算器内部和之中的变异性和一致性。还将遗传Ne估计值随时间的变化与人口结构的变化和普查估计值的波动进行了比较，包括在人口减少和恢复期间实验操纵的人口瓶颈对人口统计和遗传Ne估计的影响。尽管瓶颈前和瓶颈后的普查估计为591和565，但包含最高，瓶颈前和瓶颈后数据的抽样年份显示，使用时间估计量的估计值最低（Ne = 16至18）。Ne的估计具有越来越严格的置信度样本数量接近每个种群中繁殖个体的实际数量的时间间隔。被测估计量之间的性能差异突出了它们的潜在偏见和对不同假设的依赖，说明了它们的潜在价值和评估野生种群适应性潜力的警告。

著录项

  • 作者

    Hill, Ryan.;

  • 作者单位

    Trent University (Canada).;

  • 授予单位 Trent University (Canada).;
  • 学科 Ecology.;Conservation biology.;Wildlife conservation.
  • 学位 M.S.
  • 年度 2018
  • 页码 71 p.
  • 总页数 71
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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