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首页> 外文期刊>The Royal Society Proceedings B: Biological Sciences >The dilemma of female mate selection in the brown bear, a species with sexually selected infanticide.
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The dilemma of female mate selection in the brown bear, a species with sexually selected infanticide.

机译：棕熊雌性伴侣选择的困境，棕熊是一种具有性选择杀婴剂的物种。

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摘要

Because of differential investment in gametes between sexes, females tend to be the more selective sex. Based on this concept, we investigate mate selection in a large carnivore: the brown bear (Ursus arctos). We hypothesize that, in this species with sexually selected infanticide (SSI), females may be faced with a dilemma: either select a high-quality partner based on phenotypic criteria, as suggested by theories of mate choice, or rather mate with future potentially infanticidal males as a counter-strategy to SSI. We evaluated which male characteristics were important in paternity assignment. Among males available in the vicinity of the females, the largest, most heterozygous and less inbred and also the geographically closest males were more often the fathers of the female's next litter. We suggest that female brown bears may select the closest males as a counter-strategy to infanticide and exercise a post-copulatory cryptic choice, based on physical attributes, such as a large body size, reflectingmale genetic quality. However, male-male competition either in the form of fighting before copulation or during the post-copulatory phase, in the form of sperm competition, cannot entirely be ruled out.
机译：由于性别之间在配子上的不同投资，女性往往是选择性更高的性别。基于此概念，我们研究了大型食肉动物的选择：棕熊（Ursus arctos）。我们假设，在具有性杀婴选择（SSI）的物种中，雌性可能面临两难境地：根据配偶选择理论建议，根据表型标准选择高质量的伴侣，或者与未来潜在的杀婴性交配男性作为SSI的对策。我们评估了哪些男性特征在陪产分配中很重要。在雌性附近可利用的雄性中，最大，最杂合且近交较少的雄性，以及地理上最接近的雄性通常是雌性下一个产仔的父亲。我们建议雌性棕熊可以根据身体属性（例如较大的体型）选择最接近的雄性作为对付杀婴剂的雄性策略，并进行交配后的隐秘选择，这反映了雄性的遗传品质。但是，不能完全排除以交配前战斗或交配后阶段为精子竞争形式的男女竞争。

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