FAITHFUL WITHOUT CARE: THE EVOLUTION OF MONOGYNY
FAITHFUL WITHOUT CARE: THE EVOLUTION OF MONOGYNY
复制标题
DOI：
10.1111/j.0014-3820.2005.tb01790.x
复制
发表时间：
2005-07
期刊：
影响因子：
--
通讯作者：
L. Fromhage;M. Elgar;J. Schneider
中科院分区：
文献类型：
--
作者：
L. Fromhage;M. Elgar;J. Schneider
摘要男性一夫多妻制和女性一夫一妻制的传统模式已经被一种认识所取代，即两性通常可能与几个伴侣交配。因此，很多注意力集中在一夫多妻制的进化上，而一夫一妻制(男性一夫一妻制)的进化意义仍然知之甚少。一夫一妻制是一种在分类上广泛存在的交配系统，其中包括男性自我牺牲的戏剧性例子，当父亲投资的好处超过寻找其他配偶的好处时，就会被预测出来。然而，一夫一妻制也出现在缺乏父亲投资的动物身上，而不是代表着一种父权保护形式。有人提出，在雄性寻找配偶的成本较高的地方，这种交配系统是可以预期的。然而，这一论点没有认识到，如果男性找到配偶的概率很低，那么他可能就很有可能不需要捍卫自己的父亲身份。使用一个数学模型，我们表明，当性别比例偏向男性时，一夫一妻制作为增加父子关系的一种手段更受青睐，但不一定会受到高搜索成本的影响。各种实证研究支持了男性偏见的性别比例对于一夫一妻制演变的重要性。
Abstract The traditional paradigm of male polygamy and female monogamy has been replaced by the recognition that both sexes may typically mate with several partners. As a consequence, much attention has focused on the evolution of polyandry, while the evolutionary significance of monogyny (male monogamy) remains poorly understood. Monogyny, a taxonomically widespread mating system that includes dramatic examples of male self-sacrifice, is predicted when the benefits of paternal investment exceed those of searching for additional mates. However, monogyny also occurs in animals lacking paternal investment, instead representing a form of paternity protection. It has been suggested that such mating systems are expected where the costs of mate search for males are high. However, this argument fails to recognize that if there is a low probability of a male finding a mate, then there may be a high probability that he will not need to defend his paternity. Using a mathematical model, we show that monogyny as a means of increasing paternity is favored when the sex ratio is male biased, but not necessarily by high search costs. The importance of a male-biased sex ratio for the evolution of monogyny is supported by various empirical studies.