Sexual selection in wild baboons: from mating opportunities to paternity success
Sexual selection in wild baboons: from mating opportunities to paternity success
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DOI：
10.1016/j.anbehav.2006.05.001
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发表时间：
2006-11-01
期刊：
影响因子：
2.5
通讯作者：
Altmann, Jeanne
中科院分区：
文献类型：
--
作者：
Alberts, Susan C.;Buchan, Jason C.;Altmann, Jeanne
在哺乳动物中，雄性中的高统治地位通常与交配成功有关。然而，交配机会不会自动转化为后代的产生；由于三个原因，观察到的交配成功可能与后代的产生不一致。 （1）如果某些交配是秘密进行的（减少了被观察到的机会），则观察到的交配可能无法代表实际交配；（2）如果某些雄性将更多的交配努力分配给具有高生育力的雌性（即，如果某些雄性在较高生育力的交配上进行差异化投资），则交配可能是非随机的；（3）如果精子竞争或精子选择在受孕过程中发挥作用，受孕成功可能是非随机的。我们对东部非洲安博塞利盆地的草原狒狒（Papio cynocephalus）种群进行了亲子关系遗传分析，以衡量观察到的交配成功与实际后代繁殖之间的一致性。我们发现，观察到的交配成功通常是亲子鉴定成功的良好预测因素，地位较高的雄性比地位较低的雄性具有更高的亲子鉴定成功率，并且雄性密度和雄性等级稳定性导致雄性亲子鉴定成功的差异。我们几乎没有发现成功的秘密交配的证据（尽管亚成年雄性确实偶尔会产生后代，显然是使用这种策略），也没有明确的证据表明精子成功率或精子耗竭的差异（尽管我们不能排除它们）。然而，我们发现明确的证据表明，地位较高的雄性表现出择偶倾向，将交配努力集中在经历受孕周期的雌性身上，而不是非受孕周期的雌性身上。 (c) 2006 年动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
In mammals, high dominance rank among males is often associated with mating success. However, mating opportunities do not automatically translate into offspring production; observed mating success may be discordant with offspring production, for three reasons. (1) Observed mating may be nonrepresentative of actual mating if some mating is surreptitious (decreasing the chance that it will be observed), (2) mating may be nonrandom if some males allocate more mating effort to females with high fertility (i.e. if some males differentially invest in higher fertility mating) and (3) conception success may be nonrandom if sperm competition or sperm selection play a role in conception. We performed a genetic analysis of paternity in the well-studied savannah baboon, Papio cynocephalus, population in the Amboseli basin, eastern Africa, in order to measure the concordance between observed mating success and actual offspring production. We found that observed mating success was generally a good predictor of paternity success, that high-ranking males had higher paternity success than lower-ranking males, and that male density and male rank stability contributed to variance in male paternity success. We found little evidence for successful surreptitious mating (although subadult males did occasionally produce offspring, apparently using this strategy), and no clear evidence for differential sperm success or sperm depletion (although we could not rule them out). However, we found clear evidence that high-ranking males showed mate choice, concentrating their mating efforts on females experiencing conceptive rather than nonconceptive cycles. (c) 2006 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.