Frye Brett M, McCoy Dakota E, Kotler Jennifer, Embury Amanda, Burkart Judith M, Burns Monika, Eyre Simon, Galbusera Peter, Hooper Jacqui, Idoe Arun, Goya Agustín López, Mickelberg Jennifer, Quesada Marcos Peromingo, Stevenson Miranda, Sullivan Sara, Warneke Mark, Wojciechowski Sheila, Wormell Dominic, Haig David, Tardif Suzette D
Department of Biology, Emory & Henry College, Emory, VA 24327, USA.
Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA.
iScience. 2022 Jan 1;25(1):103724. doi: 10.1016/j.isci.2021.103724. eCollection 2022 Jan 21.
Life history theory predicts a trade-off between the quantity and quality of offspring. Short interbirth intervals-the time between successive births-may increase the quantity of offspring but harm offspring quality. In contrast, long interbirth intervals may bolster offspring quality while reducing overall reproductive output. Further research is needed to determine whether this relationship holds among primates, which have intensive parental investment. Using Cox proportional hazards models, we examined the effects of interbirth intervals (short, normal, or long) on infant survivorship using a large demographic dataset (n = 15,852) of captive callitrichine monkeys (marmosets, tamarins, and lion tamarins). In seven of the nine species studied, infants born after short interbirth intervals had significantly higher risks of mortality than infants born after longer interbirth intervals. These results suggest that reproduction in callitrichine primates may be limited by physiologic constraints, such that short birth spacing drives higher infant mortality.
生活史理论预测，后代数量与质量之间存在权衡。较短的生育间隔（即连续两次生育之间的时间）可能会增加后代数量，但会损害后代质量。相比之下，较长的生育间隔可能会提升后代质量，同时降低总体繁殖产出。需要进一步研究以确定这种关系在具有高强度亲代投资的灵长类动物中是否成立。我们使用Cox比例风险模型，利用圈养绢毛猴（狨猴、柽柳猴和狮面狨）的一个大型人口统计学数据集（n = 15852），研究了生育间隔（短、正常或长）对婴儿存活率的影响。在所研究的九个物种中的七个物种中，生育间隔短的情况下出生的婴儿比生育间隔长的情况下出生的婴儿有显著更高的死亡风险。这些结果表明，绢毛猴灵长类动物的繁殖可能受到生理限制，使得短生育间隔导致更高的婴儿死亡率。
