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- W2000368594 abstract "Parentage in indigo buntings, Passerina cyanea, was examined by electrophoresis of soluble enzymes in muscle tissue. There were nine polymorphic loci which segregated independently. Of 257 offspring sampled in the 2 years, 37 (14·4%) had genotypes incompatible with one of the putative parents. Since evidence suggested that intraspecific egg parasitism did not occur, all of these offspring probably came from successful extra-pair copulations. More neighbouring males had genotypes that fitted the genotypes of the excluded young than expected by chance. Most of these males already had nesting females of their own. The probability of cuckoldry depended on the male's age but not on whether or not he was polygynous. Some males probably fathered many offspring through extra-pair copulations while others were cuckolded. These results are examined in light of behavioural observations on this species. Because parental exclusions underestimate the frequency of extra-pair fertilizations, an estimate of the actual rate of extra-pair fertilizations is reported. The consequences of these results for theories about mating systems and sexual selection are discussed." @default.
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- W2000368594 date "1987-06-01" @default.
- W2000368594 modified "2023-09-25" @default.
- W2000368594 title "Extra-pair fertilizations in a predominantly monogamous bird: genetic evidence" @default.
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- W2000368594 doi "https://doi.org/10.1016/s0003-3472(87)80123-9" @default.
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