Adult sex ratio and operational sex ratio exhibit different temporal dynamics in the wild
Adult sex ratio and operational sex ratio exhibit different temporal dynamics in the wild
复制标题
DOI：
10.1093/beheco/arw183
复制
发表时间：
2017-03-01
影响因子：
2.4
通讯作者：
Kuepper, Clemens
中科院分区：
文献类型：
--
作者：
Carmona-Isunza, Maria Cristina;Ancona, Sergio;Kuepper, Clemens
成年性比（ASR，成年雄性在成年种群中的比例）和可操作性比（OSR，交配池中性活跃雄性的比例）是繁殖种群的基本属性，它们通常与交配系统和性选择有关。然而，ASR和OSR出现通过不同的路线在人口中，并可能表现出不同的时间模式。在这里，我们使用的数据，从一个良好的监测一夫多妻制的普洛弗Charadrius nivosus人口抽样超过3个连续的繁殖季节，调查是否在ASR的时间变化与OSR的变化。我们发现，雪鸟表现出男性偏见的ASR和OSR。与理论预期一致，OSR比ASR更易变。然而，OSR和ASR之间没有一致的关系：在3个研究年中，我们发现只有1年存在弱的正相关关系（r = 0.22）。时间序列分析和敏感性测试证实了缺乏关联。因此，我们的工作表明，ASR和OSR表现出不同的时间模式在一夫多妻制的人口，我们呼吁进一步的理论和实证研究，分析它们之间的关系在一系列不同的育种系统。
Adult sex ratio (ASR, the proportion of adult males in the adult population) and operational sex ratio (OSR, the proportion of sexually active males in the mating pool) are fundamental properties of breeding populations and they are often linked to mating systems and sexual selection. However, ASR and OSR emerge via different routes in a population and may exhibit different temporal patterns. Here, we use data from a well-monitored polygamous snowy plover Charadrius nivosus population sampled over 3 consecutive breeding seasons to investigate whether temporal changes in ASR relate to changes in OSR. We found that snowy plovers exhibited male-biased ASR and OSR. Consistent with theoretical expectations, OSR was more variable than ASR. However, there was no consistent relationship between OSR and ASR: in only 1 of the 3 study years we found a weak positive relationship (r = 0.22). The lack of association was corroborated by time series analyses and sensitivity tests. Our work therefore suggests that ASR and OSR exhibit different temporal patterns in a polygamous population, and we call for further theoretical and empirical studies that analyze their relationship across a range of different breeding systems.