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The influence of maternal quality and social environment on male dispersal behaviour, alternative reproductive tactics and glucocorticoid levels in a free-ranging social mammal

母性质量和社会环境对自由放养的社会性哺乳动物雄性扩散行为、替代生殖策略和糖皮质激素水平的影响

基本信息

批准号：
182517319
负责人：
Dr. Oliver Höner
金额：
--
依托单位：
Leibniz-Institut für Zoo- und Wildtierforschung (IZW)
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2013-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/182517319?language=en
关键词：
influence maternal quality social environment

项目摘要

In most social mammals, most males leave their natal group and disperse to another group to reproduce. The behaviour that a male expresses during dispersal and the tactics it applies to reproduce are of fundamental importance because they strongly influence male fitness. In many species, males vary in their dispersal behaviour and reproductive tactics, but little is known about the factors that cause this variation. Recent theoretical studies suggest that the maternal quality and social environment that a male experiences during development may shape its dispersal behaviour and reproductive tactics by influencing its condition, its ability to cope with stressful situations, and its release of ‘stress’ hormones. Here I propose to test predictions on the influence of the maternal and social environment on male dispersal behaviour, reproductive tactics, and basal faecal glucocorticoid concentrations in a large social carnivore, the spotted hyena. Tests will be based on data from natural experiments, detailed behavioural observations, long-term demographic data, and faecal samples collected non-invasively from a well-studied population of several hundred hyenas in Tanzania. The results from the proposed study will allow us to better assess the extent of maternal effects on key behavioural and life-history traits of adult males, and increase our understanding of the variation in reproductive tactics of males and their ability to choose and settle in high-quality breeding sites.

在大多数社会性哺乳动物中，大多数雄性会离开其出生群体并分散到另一个群体中进行繁殖。雄性在扩散过程中表现出的行为及其繁殖策略至关重要，因为它们强烈影响雄性的健康。在许多物种中，雄性的分散行为和繁殖策略各不相同，但人们对导致这种变化的因素知之甚少。最近的理论研究表明，雄性在发育过程中经历的母性质量和社会环境可能会影响其状况、应对压力情况的能力以及“压力”激素的释放，从而影响其分散行为和繁殖策略。在这里，我建议测试关于母性和社会环境对大型社会性食肉动物斑鬣狗的雄性扩散行为、繁殖策略和基础粪便糖皮质激素浓度影响的预测。测试将基于自然实验的数据、详细的行为观察、长期人口统计数据以及从坦桑尼亚经过充分研究的数百只鬣狗种群中非侵入性收集的粪便样本。这项研究的结果将使我们能够更好地评估母体对成年雄性关键行为和生活史特征的影响程度，并增加我们对雄性繁殖策略变化及其选择和定居高质量繁殖地点的能力的了解。