PATERNAL INVESTMENT INVERSELY RELATED TO DEGREE OF EXTRA-PAIR PATERNITY IN THE REED BUNTING

被引：294
作者：
DIXON, A
ROSS, D
OMALLEY, SLC
BURKE, T
机构：
[1] Department of Zoology, University of Leicester
[2] Waltham Centre for Pet Nutrition
来源：
NATURE | 1994年 / 371卷 / 6499期
关键词：
D O I：
10.1038/371698a0
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
EXTRA-PAIR copulations, in which a female copulates with a male other than her mate, are known to occur in many bird species(1). Here we study a wild population of reed buntings, Emberiza schoeniclus, using single-locus DNA fingerprinting(2,3) and find an exceptionally high proportion of extra-pair paternity that accounts for 55% (118/216) of young and 86% (50/58) of nests. Twelve pairs each raised two broods in a single season in which the proportion of extra-pair young differed between the two broods. A highly significant relationship between a male's parental investment and his degree of paternity was revealed by a comparison between the first and second brood of each pair, with more paternal care usually being provided at the nest that contained a lower proportion of extra-pair young. We propose that males can assess their likelihood of paternity and adjust their nestling provisioning rates accordingly.
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页码：698 / 700
页数：3
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