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首页> 外文期刊>Canadian Journal of Zoology >Quantifying partial migration with sex-ratio balancing
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Quantifying partial migration with sex-ratio balancing

机译：用性比率平衡量化部分迁移

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摘要

Partial migration, the phenomenon in which animal populations are composed of both migratory and nonmigratory individuals, is widespread among migrating animals. The proportion of migrants in these populations has direct influences on population genetics and dynamics, ecosystem dynamics, mating systems, evolution, and responses to environmental change, yet there are very few studies that measure the proportion of migrants. This is because existing methods to estimate the proportion of migrants are time-consuming and expensive. In this paper, we demonstrate a new method for estimating the proportion of migrants in a population based on sex ratio measurements. Many partially migratory taxa exhibit sex-biased migration or residency, and in these cases, the sex ratios of migrants and nonmigrants are fundamentally related to the proportion of migrants in the population. We define this relationship quantitatively and show how it can be used to infer the proportion of migrants in a population through a process we term "sex-ratio balancing". We obtain Bayesian estimates of proportion of migrants and quantify the uncertainty in these estimates with highest posterior density intervals. Lastly, we validate the sex-ratio balancing approach with a Chinook salmon (Oncorhynchus tshawytscha Walbaum in Artedi, 1792) data set. Sex-ratio balancing holds promise as a tool for quantifying partial migration and filling a key data gap about partially migratory taxa.
机译：部分迁移，动物群体由迁徙和非移民个体组成的现象，在迁移动物中普遍存在。这些群体中移民的比例直接影响人口遗传学和动态，生态系统动态，交配系统，进化和对环境变化的反应，但衡量移民比例的研究很少。这是因为估计移民比例的现有方法是耗时和昂贵的。在本文中，我们证明了一种新方法，用于估算基于性别比率测量人口中移民比例的方法。许多部分迁徙的分类群表现出性别偏见的移民或居住，在这些情况下，移民和非移民的性别比率与人口中移民的比例根本相关。我们定量地定义了这种关系，并通过我们术语“性别比率平衡”的过程来展示如何用来推断人口中的移民比例。我们获得贝叶斯估计的移民比例，并以最高的后密度间隔量化这些估计中的不确定性。最后，我们验证了与Chinook Salmon（artedi，1792年）数据集的Chinook Salmon（Oncorynchus Tshawytscha Walbaum）进行了性比率平衡方法。性别比率平衡保存作为用于量化部分迁移和填充部分迁移分类群的关键数据间隙的工具。

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