Rainfall decrease and red deer rutting behaviour: Weaker and delayed rutting activity though higher opportunity for sexual selection.
Rainfall decrease and red deer rutting behaviour: Weaker and delayed rutting activity though higher opportunity for sexual selection.
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DOI：
10.1371/journal.pone.0244802
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Membrillo A
中科院分区：
文献类型：
--
作者：
F Millán M;Carranza J;Pérez-González J;Valencia J;Torres-Porras J;Seoane JM;de la Peña E;Alarcos S;Sánchez-Prieto CB;Castillo L;Flores A;Membrillo A
在过去的几十年里，气候变化导致南欧平均气温上升，平均降雨量减少，预计这将减少食草动物的资源可获得性。资源的可获得性会影响动物的身体状况和种群增长。然而，关于它对生殖性能和性选择的影响，我们知道的要少得多。在本研究中，我们评估了与气候变化有关的三个环境因子(降雨量、温度和植被指数)对伊比利亚马鹿繁殖时机和性行为的影响，以及它们对种群中性别选择机会的影响。我们测量了发情物候作为发情高峰期，雄性发情活动强度作为咆哮率，以及在西班牙西南部的Doñana生物保护区，根据发情期间收集的每日观察数据，通过雌性后宫在雄性中的分布来测量发情物候和性别选择的机会。在本研究期间，我们发现降雨减少，因此环境条件变差的趋势，这与发情季节推迟和发情强度降低有关，但这似乎有利于更高程度的一夫多妻制和性别选择机会，所有这些关系都受到人口密度和性别比例的调节。这项研究强调了气候变化(主要是该地区降雨量的减少)如何改变大型陆地哺乳动物的交配条件和性别选择的机会。
In the last decades, climate change has caused an increase in mean temperatures and a reduction in average rainfall in southern Europe, which is expected to reduce resource availability for herbivores. Resource availability can influence animals' physical condition and population growth. However, much less is known on its effects on reproductive performance and sexual selection. In this study, we assessed the impact of three environmental factors related to climate change (rainfall, temperature and vegetation index) on Iberian red deer Cervus elaphus hispanicus reproductive timing and sexual behaviour, and their effects on the opportunity for sexual selection in the population. We measured rutting phenology as rut peak date, the intensity of male rutting activity as roaring rate, and the opportunity for sexual selection from the distribution of females among harem holding males in Doñana Biological Reserve (Southwest Spain), from data of daily observations collected during the rut over a period of 25 years. For this study period, we found a trend for less raining and hence poorer environmental conditions, which associated with delayed rutting season and decreased rutting intensity, but that appeared to favour a higher degree of polygyny and opportunity for sexual selection, all these relationships being modulated by population density and sex ratio. This study highlights how climate change (mainly rainfall reduction in this area) can alter the conditions for mating and the opportunity for sexual selection in a large terrestrial mammal.
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影响因子：
2.5
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