Social monogamy and the threat of infanticide in larger mammals

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Borries C., Savini T., Koenig A.

ปีที่เผยแพร่ (ค.ศ.): 2011

Volume number: 65

Issue number: 4

หน้าแรก: 685

หน้าสุดท้าย: 693

จำนวนหน้า: 9

นอก: 0340-5443

eISSN: 0340-5443

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-79952708254&doi=10.1007%2fs00265-010-1070-5&partnerID=40&md5=e9b5196c80c386ca3b0cc7f6c22d1108

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

The evolution of social monogamy in larger mammals is difficult to explain because males usually do not invest much in direct offspring care and might achieve greater fitness by deserting a pregnant female to reproduce with additional females elsewhere. It has been hypothesized that socially monogamous males remain with the female year-round to protect their offspring from infanticide by new immigrant males. We investigated this idea by analyzing all cases of infant loss in a wild population of white-handed gibbons (Hylobates lar; Primates), in which most groups were socially monogamous and some polyandrous (137.5 group years). We examined the influence of (a) male intruder pressure on male immigration rates and (b) the presence of a new male in the group on infant loss. We found no relation between intruder pressure and male immigration rates. Infant loss was lowest (4.5%) for stable monogamy (probable father stayed from conception through infancy) and intermediate (25.0%; p = 0.166) for stable polyandry. If a new male immigrated after conception, however, the infant was lost in all cases (p < 0.01) independent of the presumed father's presence. Overall, 83.3% of infant losses were associated with the presence of a presumably unrelated male. Although the sample size is small, our results provide the first true support for the idea that the risk of infanticide is an important factor in the evolution of social monogamy in larger mammals. ฉ 2010 Springer-Verlag.

คำสำคัญ

Infant loss, Intruder pressure, Male immigration, Polyandry, Take-over, White-handed gibbon