High frequency of extrapair fertilization in a plural breeding bird, the Mexican jay, revealed by DNA microsatellites
Article Abstract:
A new study uses tetra-nucleotide microsatellite DNA to estimate extrapair fertilization frequency in the Mexican jay, Aphelocoma ultramarina.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 2000
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Floater males gain reproductive success through extrapair fertilizations in the stitchbird
Article Abstract:
Research shows that extrapair copulations occur in many animal populations and are part of mixed reproductive behaviors where paired males copulate with other, already paired, females. A new study of stitchbird chicks from an isolated breeding population in New Zealand uses minisatellite DNA profiling to apportion parentage. Results show that extrapair copulation accounted for 35% of all nestling and that 80% of nests contained extrapair young.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1999
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Testosterone and social and reproductive behaviour in Aphelocoma jays
Article Abstract:
In both western scrub-jays and Mexican jays testosterone levels increase rapidly in March. Elevated testosterone levels were seen for around three weeks in the monogamous western scrub-jay, continuing into May in Mexican jays. This supports the hypothesis that testosterone is elevated when male-male competition is frequence and mating opportunities rely on the outcome of that competition.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1999
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