Spontaneous abortion as a response to reproductive conflict in the banded mongoose.
Spontaneous abortion as a response to reproductive conflict in the banded mongoose.
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自然流产是带状猫鼬对生殖冲突的反应。
DOI：
10.1098/rsbl.2019.0529
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发表时间：
2019
期刊：
影响因子：
3.3
通讯作者：
Inzani E
中科院分区：
文献类型：
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作者：
Inzani E
当繁殖雌性竞争有限的资源时，这种生殖冲突的强度可以决定当前生殖努力的健身效益是否超过生存和未来生育的潜在成本。在群居物种中，生殖竞争可以通过共同繁殖的雌性后代之间的出生后竞争发生。自然流产可能是对这种竞争的一种反应，使雌性能够减少对不太可能存活的后代的生殖支出，并为未来的繁殖机会保存资源。我们测试了这一假设使用的长期数据带猫鼬，蒙戈蒙戈，其中多个女性在一组同步分娩的公共垃圾是由其他组成员照顾。正如预测的那样，在食物稀缺的干旱时期，以及在生殖竞争更加激烈的繁殖尝试中，流产的可能性更大。在繁殖事件中，年轻，体重较轻的女性携带较小的胎儿更容易流产，特别是那些也是较低的排名。我们的研究结果表明，堕胎可能是一种手段，弱势女性保存资源，为未来的繁殖尝试在更良性的条件下，并强调，女性生殖竞争可能会解决很久之前生产的后代。
When breeding females compete for limited resources, the intensity of this reproductive conflict can determine whether the fitness benefits of current reproductive effort exceed the potential costs to survival and future fertility. In group-living species, reproductive competition can occur through post-natal competition among the offspring of co-breeding females. Spontaneous abortion could be a response to such competition, allowing females to curtail reproductive expenditure on offspring that are unlikely to survive and to conserve resources for future breeding opportunities. We tested this hypothesis using long-term data on banded mongooses,Mungos mungo, in which multiple females within a group give birth synchronously to a communal litter that is cared for by other group members. As predicted, abortions were more likely during dry periods when food is scarce, and in breeding attempts with more intense reproductive competition. Within breeding events, younger, lighter females carrying smaller fetuses were more likely to abort, particularly those that were also of lower rank. Our results suggest that abortion may be a means by which disadvantaged females conserve resources for future breeding attempts in more benign conditions, and highlight that female reproductive competition may be resolved long before the production of offspring.