Evolution from monogamy to polygyny: insights from the solitary Japanese serow
Evolution from monogamy to polygyny: insights from the solitary Japanese serow
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从一夫一妻制到一夫多妻制的演变：来自孤独的日本鬣羚的见解
DOI：
10.1007/s00265-023-03304-y
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发表时间：
2023
影响因子：
2.3
通讯作者：
Minami Masato
中科院分区：
文献类型：
--
作者：
Takada Hayato;Washida Akane;Yano Risako;Tezuka Natsuki;Minami Masato
了解驱动交配系统进化的主要因素是行为生态学的一个主要目标。在有蹄类动物中，从森林到开放栖息地的转变以及随之而来的雌性集群空间分布被认为促进了从一夫一妻制到一夫多妻制的进化转变。然而，迄今为止，还没有实地研究在实地测试过生态条件的这种变化是否会促进从一夫一妻制向一夫多妻制的转变。我们调查了日本羚羊的交配系统，日本羚羊是山羊科动物中的进化祖先和独居物种，在亚高山森林和高山草甸地区生活了 7 年多。我们通过种群比较评估了栖息地特征对交配系统的影响。在这个地点，雌性在亚高山森林中形成单独的领地，但在高山草甸中形成群体领地。雄性将其大部分领地视为领地，并且存在社会一夫一妻制（29.6%；一雄一雌）和一夫多妻制（70.4%；一雄二至五雌）。高山草甸中的雄性与更多雌性形成交配单位，而亚高山森林中的雄性则与单个雌性形成交配单位。我们表明，开放的栖息地促进了从社会一夫一妻制向一夫多妻制以及更高程度的社会一夫多妻制的转变。我们的研究结果表明，影响交配系统的主要因素是雌性的空间分散性（独居领地或群体领地），这取决于栖息地结构（封闭或开放）。意义陈述日本鬣羚是主要栖息在森林中的有蹄类动物，并且被认为拥有山羊科动物的祖先社会系统，例如独居和一夫一妻制的领地。我们发现，开放的栖息地，例如高山草甸，促进了日本鬣羚从一夫一妻制向一夫多妻制领土的转变。在研究地点，高山草甸促进了雌性从单独领地向群体领地的转变。因此，我们的结果表明，影响交配系统的主要因素是雌性的空间分散（单独或群体领地），这取决于栖息地结构（亚高山森林或高山草甸）。我们的研究结果为山羊的社会进化模式提供了证据，居住在森林中的祖先向开阔的山区扩散，促进了社会从一夫一妻制向一夫多妻制的演变。
Understanding the main factors driving the evolution of mating systems is a major goal of behavioral ecology. In ungulates, the transition from forests to open habitats and the accompanying clustered spatial distribution of females are thought to have promoted an evolutionary shift from monogamy to polygyny. However, no field-based studies to date have tested in the field whether such changes in ecological conditions promote a shift from monogamy to polygyny. We investigated mating systems of the Japanese serow, which is an evolutionarily ancestral and solitary species among caprids, living in the area with subalpine forest and alpine meadows over 7 years. We evaluated the effects of habitat characteristics on mating systems using within population comparisons. In this site, females form solitary territories in subalpine forests but group territories in alpine meadows. Males defended most of their home ranges as territories, and both social monogamy (29.6%; one male with one female) and polygyny (70.4%; one male with 2–5 females) were observed. Males in alpine meadows formed mating units with more females, whereas males in subalpine forests formed mating units with single females. We show that open habitats promote the transition from social monogamy to polygyny and a higher degree of social polygyny. Our findings suggest that the main factor affecting the mating system is the spatial dispersion of females (solitary territory or group territory), which depends on habitat structure (closed or open).Significance statementThe Japanese serow is an ungulate that mainly inhabits forests and is assumed to possess the ancestral social systems for caprids, such as solitary and monogamous with territory. We found that open habitats, such as alpine meadows, promote the transition from monogamous to polygynous territory in the Japanese serow. In the study site, alpine meadows promote the transition from solitary territory to group territory of females. Thus, our results suggest that the main factor affecting the mating system is the spatial dispersion of females (solitary or group territory), which depends on habitat structure (subalpine forests or alpine meadows). Our findings provide evidence for a social evolutionary pattern in caprids, whereby the spread of forest-dwelling ancestors into open mountains promote evolution from social monogamy to polygyny.
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影响因子：
2.5
作者：
P. E. Komers
通讯作者：
P. E. Komers
影响因子：
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作者：
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影响因子：
2.5
作者：
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通讯作者：
Manser, MB
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
D. L. Scarnecchia;Raul Valdez;P. Krausman
通讯作者：
P. Krausman
影响因子：
2.3
作者：
Hogg, JT;Forbes, SH
通讯作者：
Forbes, SH