MATING UNPLUGGED: A MODEL FOR THE EVOLUTION OF MATING PLUG (DIS-)PLACEMENT
MATING UNPLUGGED: A MODEL FOR THE EVOLUTION OF MATING PLUG (DIS-)PLACEMENT
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DOI：
10.1111/j.1558-5646.2011.01406.x
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发表时间：
2012-01-01
期刊：
影响因子：
3.3
通讯作者：
Fromhage, Lutz
中科院分区：
文献类型：
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作者：
Fromhage, Lutz
交配塞是雄性衍生的结构，可能通过物理阻塞雌性生殖道来阻碍雌性再交配。尽管许多类群中都存在交配插头，但人们对影响其进化的力量却知之甚少。如果雄性的交配插头能确保其父子关系，那么雄性显然可以受益。然而，目前还不清楚，面对对雄性去除竞争对手放置的任何插头的能力的不利选择，如何在进化过程中保持插头功效。在这里，我提出了一个博弈论模型和一个模拟模型来解决这个问题。这些模型预测，当（1）每个雌性的交配尝试次数较低时，交配效率的进化稳定水平应该很高； (2) 性别比例偏向男性，(3) 男性的精子数量有限。我根据经验数据讨论这些结果。
Mating plugs are male-derived structures that may impede female remating by physically obstructing the female genital tract. Although mating plugs exist in many taxa, the forces shaping their evolution are poorly understood. A male can clearly benefit if his mating plug secures his paternity. It is unclear, however, how plug efficacy can be maintained over evolutionary time in the face of counteracting selection on males ability to remove any plugs placed by their rivals. Here, I present a game-theory model and a simulation model to address this problem. The models predict that evolutionarily stable levels of mating-plug efficacy should be high when (1) the number of mating attempts per female is low; (2) the sex ratio is male-biased, and (3) males are sperm-limited. I discuss these results in the light of empirical data.