Mating in a bisexually philopatric society: bottlenose dolphin females associate with adult males but not adult sons during estrous
Mating in a bisexually philopatric society: bottlenose dolphin females associate with adult males but not adult sons during estrous
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在双性恋社会中交配：雌性宽吻海豚在发情期间与成年雄性交往，但不与成年儿子交往
DOI：
10.1007/s00265-017-2380-7
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发表时间：
2017
影响因子：
2.3
通讯作者：
Mann, Janet
中科院分区：
文献类型：
--
作者：
Wallen, Megan M.;Krzyszczyk, Ewa;Mann, Janet
在裂变-聚变社会中，群体的规模和组成动态变化，反映了社会偏好和压力。最值得注意的是在繁殖过程中，两性群体动态反映了女性选择最佳伴侣和男性竞争交配访问之间的平衡。在男性和女性终身留在纳塔尔地的系统中（双性恋恋恋），女性可以通过避免交配或与男性亲属联系来降低乱伦的风险。大海豚生活在分裂融合的社会中，使它们能够行使年龄，性别和亲属协会偏见。为了确定女性选择和男性竞争之间的平衡是如何实现的，我们研究了成年女性与青少年和成年男性，包括在女性接受期的儿子，使用30年的纵向数据。成年女性表现出增加成年男性协会之前，已知的概念，而少年男性协会始终保持较低。男性怀孕后的关联下降表明，一个或两个性别检测怀孕早期。当我们检查女性与少年和成年儿子的关联，出现了一个独特的模式。成年女性优先与儿子相比，非儿子的同龄类断奶后。令人惊讶的是，骑自行车时，女性很少与成年儿子联系。我们的研究结果表明，（1）成年男性要么超过少年男性在获得肥沃的女性或女性更喜欢成年少年男性和（2）女性减少近亲繁殖的风险，减少与儿子的联系时cycling.Significance statementNo研究已经调查的行为策略，以减少近亲繁殖的两性philopatric，流体哺乳动物社会以外的人类。使用超过30年的纵向数据，我们记录了关联动态如何随女性生殖状态而变化。断奶后，母亲和儿子的联系，但几乎从来没有在怀孕期间。成年雄性和雌性在发情期频繁交往，但在受孕后急剧下降。我们的研究为长期的亲属识别和检测野生海豚的发情和早期妊娠提供了证据。这些发现对哺乳动物的两性恋、裂变-融合动力学和杀线虫剂的进化有一定的意义。
AbstractIn fission-fusion societies, group size and composition change dynamically, reflecting social preferences and pressures. Most notably during reproduction, intersexual group dynamics reflect a balance between female choice for optimal mates and male competition for mating access. In systems where males and females remain in their natal area for life (bisexual philopatry), females can reduce the risk of incest by avoiding mating or associating with male kin. Shark Bay bottlenose dolphins (Tursiops aduncus) live in fission-fusion societies that enable them to exercise age, sex, and kin association biases. To determine how the balance between female choice and male competition is achieved, we examined adult female association with juvenile and adult males, including sons during female receptive periods, using 30 years of longitudinal data. Adult females demonstrated an increase in adult male association just prior to known conceptions, while juvenile male association consistently remained low. A decline in male association post-conception suggests that one or both sexes detect pregnancy early on. When we examined female association with juvenile and adult sons, a distinct pattern emerged. Adult females preferentially associated with sons compared to non-sons of the same age class post-weaning. Strikingly, females rarely associated with their adult sons when cycling. Our results suggest that (1) adult males either out-compete juvenile males in gaining access to fertile females or females prefer adult to juvenile males and (2) females mitigate the risk of close inbreeding by reducing association with sons when cycling.Significance statementNo study has investigated behavioral strategies for reducing close inbreeding in bisexually philopatric, fluid mammal societies outside of humans. Using over 30 years of longitudinal data, we document how association dynamics change with female reproductive state. Post-weaning, mothers and sons associate, but almost never during conceptive periods. Adult male–female association is frequent during estrous, with a sharp decline after conception. Our study provides evidence for long-term kin recognition and detection of both estrous and early pregnancy among wild bottlenose dolphins. These findings have implications for the evolution of bisexual philopatry, fission-fusion dynamics, and infanticide—or lack thereof—in mammals.
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影响因子：
2.5
作者：
Brianna M Wright;Eva H. Stredulinsky;G. Ellis;J. K. Ford
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发表时间：
2014
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作者：
C. Kemper;E. Trentin;I. Tomo
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DOI：
10.1098/rspb.2010.0039
发表时间：
2010-09-07
影响因子：
4.7
作者：
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影响因子：
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作者：
R. Wells
通讯作者：
R. Wells