EXTRA-PAIR PATERNITY AND MALE CHARACTERISTICS IN THE PIED FLYCATCHER

被引:87
作者
RATTI, O
HOVI, M
LUNDBERG, A
TEGELSTROM, H
ALATALO, RV
机构
[1] UNIV JYVASKYLA, DEPT BIOL, SF-40100 JYVASKYLA, FINLAND
[2] UNIV UPPSALA, DEPT ZOOL, S-75236 UPPSALA, SWEDEN
[3] UNIV UPPSALA, DEPT GENET, S-75007 UPPSALA, SWEDEN
关键词
DNA FINGERPRINTING; EXTRA-PAIR PATERNITY; FICEDULA HYPOLEUCA; GENETIC SIMILARITY; PLUMAGE COLORATION;
D O I
10.1007/BF00170590
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
The pied flycatcher (Ficedula hypoleuca) is sexually dichromatic with extreme variation in male plumage coloration. The benefit for males of having black plumage is controversial, and few studies have found evidence for a sexual selection benefit of being black rather than brown. However, blacker males may be better able to achieve extra-pair fertilizations (EPFs), which may be an important component of sexual selection. We studied the role of EPFs in sexual selection in the pied flycatcher by establishing a set-up where two males with different back coloration (blacker vs browner) bred simultaneously near each other. DNA fingerprinting analysis revealed that 11% of offspring resulted from EPFs, and that 22% of broods included extra-pair young (EPY) among 36 nests containing 223 nestlings. We found no evidence that browner males suffered more often from EPFs than blacker males. There was no correlation of male or female morphology or age with EPF frequency. However, breeding pairs with low genetic similarity had EPY in their nests significantly more often. Thus we argue that females paired with genetically dissimilar males may try to avoid the effects of extreme outbreeding by seeking extra-pair copulations (EPCs). Alternatively, incompatibility between genetically dissimilar mates may simply expose females to more extra-pair copulations.
引用
收藏
页码:419 / 425
页数:7
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