Suppressing subordinate reproduction provides benefits to dominants in cooperative societies of meerkats.

Suppressing subordinate reproduction provides benefits to dominants in cooperative societies of meerkats.
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抑制从属繁殖为狐獴合作社会中的统治者带来了好处。

DOI:
10.1038/ncomms5499
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发表时间:
2014-07-22
影响因子:
16.6
通讯作者:
Clutton-Brock TH
Clutton-Brock TH
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Bell MB;Cant MA;Borgeaud C;Thavarajah N;Samson J;Clutton-Brock TH

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在许多动物社会中,一小部分占统治地位的雌性通过积极压制下属来垄断繁殖。理论认为,这是因为从属生殖抑制了主导的健身,但从属生殖的优势行为和生殖成功的影响从来没有被直接评估。在这里,我们描述的后果,实验性地防止下属繁殖的12组野生猫鼬(Suricata suricatta)的三个育种尝试,使用避孕注射。当下属被阻止繁殖时,占主导地位的是对下属的侵略性较低,驱逐他们不太经常,导致更高的比例的助手,以依赖幼崽,并增加供应的占主导地位的幼崽由下属的女性。当次级繁殖被抑制时,优势种群也表现出更高的觅食效率,在怀孕期间增加更多的体重,并产生更重的幼崽,这些幼崽生长得更快。这些结果证实了抑制优势的好处,并有助于解释在脊椎动物社会的单一繁殖的进化。 在等级森严的动物社会中,占统治地位的雌性会压制从属雌性的繁殖。在这里,作者通过实验抑制了从属雌性猫鼬的繁殖,并观察到优势猫鼬生下更重的幼崽,这些幼崽生长得更快,这表明这种行为提高了优势猫鼬的适应性。
In many animal societies, a small proportion of dominant females monopolize reproduction by actively suppressing subordinates. Theory assumes that this is because subordinate reproduction depresses the fitness of dominants, yet the effect of subordinate reproduction on dominant behaviour and reproductive success has never been directly assessed. Here, we describe the consequences of experimentally preventing subordinate breeding in 12 groups of wild meerkats (Suricata suricatta) for three breeding attempts, using contraceptive injections. When subordinates are prevented from breeding, dominants are less aggressive towards subordinates and evict them less often, leading to a higher ratio of helpers to dependent pups, and increased provisioning of the dominant’s pups by subordinate females. When subordinate breeding is suppressed, dominants also show improved foraging efficiency, gain more weight during pregnancy and produce heavier pups, which grow faster. These results confirm the benefits of suppression to dominants, and help explain the evolution of singular breeding in vertebrate societies. In hierarchical animal societies, dominant females suppress breeding by subordinate females. Here, the authors experimentally suppress breeding by subordinate female meerkats and observe that dominants give birth to heavier pups which grow faster, suggesting this behaviour improves fitness of dominants.
DOI: 10.1126/science.1061274
发表时间: 2001-09-28
期刊: SCIENCE
影响因子: 56.9
作者:
Clutton-Brock, TH;Russell, AF;Cameron, EZ
通讯作者: Cameron, EZ
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发表时间: 2012-11-01
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发表时间: 2001-07-27
期刊: SCIENCE
影响因子: 56.9
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发表时间: 1995-10-12
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影响因子: 64.8
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发表时间: 2012-02-01
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