Female dispersion and the evolution of monogamy in the dik-dik
Female dispersion and the evolution of monogamy in the dik-dik
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DOI：
10.1006/anbe.1997.0551
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发表时间：
1997-12-01
期刊：
影响因子：
2.5
通讯作者：
Manser, MB
中科院分区：
文献类型：
--
作者：
Brotherton, PNM;Manser, MB
在兼性一夫一妻制的哺乳动物中，雌性被认为过于分散，雄性无法保卫一个以上的雌性范围。我们在一只一夫一妻制的羚羊Madoqua kirkii身上测试了这一假设。Dik-dik领地在三个质量指数上进行了比较，以调查雄性是否因为他们有能力保卫的地区或资源的限制而实行一夫一妻制。领土的大小和质量差异很大，一些领土的资源是另一些领土的五倍。此外，四个暂时一夫多妻的雄性的领地并不比一夫一妻制的雄性的领地质量更高。这些结果与Dik-dik兼性一夫一妻制的观点是不一致的：雄性能够而且经常这样做，保卫足够的资源和足够的面积来支持两个或更多的雌性。我们进一步调查了资源分散和一夫一妻制之间的关系，通过在3个月的时间里向领地提供食物。虽然被提供的配对从食物中获得了它们每日需求量的20%，但两性的领土大小没有变化。在Dik-dik中，女性的分散并不是一夫一妻制的原因；相反，我们认为一夫一妻制是由于男性守护配偶而演变的。(C)1997年动物行为研究协会。
In facultatively monogamous mammals, females are thought to be too widely dispersed for males to defend more than one female range. We tested this hypothesis in a monogamous antelope, Kirk's dik-dik, Madoqua kirkii. Dik-dik territories were compared across three indices of quality to investigate whether males are monogamous because of constraints on the area, or resources, that they are capable of defending. Territories varied substantially in size and quality, with some containing up to five times the resources of others. Moreover, the territories of four temporarily polygynous males were not of higher quality than those of monogamous males. These results are inconsistent with the idea that dik-diks are facultatively monogamous: males can, and often do, defend enough resources and sufficient area to support two or more females. We investigated,the relationship between resource dispersion and monogamy further by providing food to territories over a 3-month period. Although provisioned pairs obtained 20% of their daily requirements from the food, there was no change in the territory size of either sex. Female dispersion does not account for monogamy in the dik-dik; instead we argue that monogamy has evolved as a result of male mate guarding. (C) 1997 The Association for the Study of Animal Behaviour.