Social mating system affects the frequency of extra-pair paternity in house wrens
Article Abstract:
Research undertaken among a population of house wrens, Troglodytes aedon, in Illinois indicates that polygynous birds, whose nests temporarily overlap, will have a higher proportion of extra-pair nestlings in their nests than monogamists. This is because polygynists find it difficult to guard one or both of their social mates. There was a substantially larger proportion of extra-pair nestlings in secondary broods of polygynous house wrens than in primary polygynous or monogamous broods. This indicates that polygynists find it hard to guard their paternity in secondary broods.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Parasites and flower choice of bumblebees
Article Abstract:
The differences in the flower choices between workers of bumblebees, Bombus pascuorum and B. humilis, parasitized by larvae of conopid flies, and unparasitized ones were examined. The choice of a reference plant vs a test plant from five species was offered. Results showed that, on the average, the parasitized bees were less likely to visit the reference plant. They were also more likely to change plant species even after the first visit in the experimental sequence.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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