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Male chimpanzee sexual coercion and mating success at Ngogo
American Journal of Primatology ( IF 2.0 ) Pub Date : 2022-01-14 , DOI: 10.1002/ajp.23361 David P Watts 1
American Journal of Primatology ( IF 2.0 ) Pub Date : 2022-01-14 , DOI: 10.1002/ajp.23361 David P Watts 1
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Chimpanzees (Pan troglodytes) have a complex mating system in which both sexes use multiple tactics. Most copulations occur in group contexts, and high-ranking males can gain high mating and reproductive success, but females typically mate with multiple males and the potential for sperm competition is high. Also, male-female dyads sometimes form temporary exclusive mating associations (consortships). Male aggression to receptive females is common. Several studies have supported the hypothesis that this is sexual coercion, but debate exists regarding the importance of coercion relative to that of female choice. The number of adult males in a community can influence the balance between these processes. In the large Ngogo community, male dominance ranks and rates of aggression to fully-swollen females were positively related to mating success as estimated by copulation rates and by proportions of copulations achieved. Aggression rates were higher than at other sites, overall and per male, especially during periovulatory periods, and increased with the number of males associating with a female. Aggression impaired female foraging efficiency. Males initiated most copulations and females rarely refused mating attempts. Male-to-female grooming was positively associated with male mating success and with the proportion of copulations that females initiated, but the amount of grooming was typically small and whether grooming-for-mating trading occurs is uncertain. These results are consistent with the hypothesis that sexual coercion is an important component of male chimpanzee mating strategies in many sociodemographic circumstances, but also show that male tactics vary both in response to and independently of those circumstances.
中文翻译：
Ngogo 的雄性黑猩猩性胁迫和交配成功
黑猩猩（Pan troglodytes ）) 有一个复杂的交配系统，其中两性都使用多种策略。大多数交配发生在群体环境中，地位高的雄性可以获得很高的交配和繁殖成功率，但雌性通常会与多个雄性交配，精子竞争的可能性很高。此外，雌雄同体有时会形成临时的排他性交配协会（配偶）。男性对接受性女性的攻击是常见的。几项研究支持这是性胁迫的假设，但关于胁迫相对于女性选择的重要性存在争议。社区中成年男性的数量会影响这些过程之间的平衡。在庞大的 Ngogo 社区中，根据交配率和交配比例估计，雄性优势等级和对完全肿胀的雌性的攻击率与交配成功呈正相关。总体上和每个男性的攻击率都高于其他地点，尤其是在排卵期，并且随着男性与女性交往的数量增加。攻击性损害了女性的觅食效率。大多数交配都是雄性发起的，而雌性很少拒绝交配尝试。雄性对雌性的梳理毛发与雄性交配成功和雌性开始交配的比例呈正相关，但梳理毛发的量通常很小，是否发生梳理毛发交配交易尚不确定。
更新日期：2022-02-10
中文翻译：
Ngogo 的雄性黑猩猩性胁迫和交配成功
黑猩猩（Pan troglodytes ）) 有一个复杂的交配系统，其中两性都使用多种策略。大多数交配发生在群体环境中，地位高的雄性可以获得很高的交配和繁殖成功率，但雌性通常会与多个雄性交配，精子竞争的可能性很高。此外，雌雄同体有时会形成临时的排他性交配协会（配偶）。男性对接受性女性的攻击是常见的。几项研究支持这是性胁迫的假设，但关于胁迫相对于女性选择的重要性存在争议。社区中成年男性的数量会影响这些过程之间的平衡。在庞大的 Ngogo 社区中，根据交配率和交配比例估计，雄性优势等级和对完全肿胀的雌性的攻击率与交配成功呈正相关。总体上和每个男性的攻击率都高于其他地点，尤其是在排卵期，并且随着男性与女性交往的数量增加。攻击性损害了女性的觅食效率。大多数交配都是雄性发起的，而雌性很少拒绝交配尝试。雄性对雌性的梳理毛发与雄性交配成功和雌性开始交配的比例呈正相关，但梳理毛发的量通常很小，是否发生梳理毛发交配交易尚不确定。
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