Patterns of natal dispersal, turnover and dispersal costs in eastern bluebirds
Article Abstract:
The female eastern bluebirds, Sialia sialis, disperse further from the natal territory than males and have a greater tendency to emigrate from the local population. A study of natal dispersal patterns in a South Carolina population focuses on different dispersal measures, initial reproductive ability, survival of parents and accessible nest sites. The local population contains more female than male immigrants. Philopatric and dispersing second-year males and females exhibit similar initial reproductive success and adult turnover rates has no effect on dispersal of offspring.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
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Multiple mating by females selects for males that stay: another hypothesis for social monogamy in passerine birds
Article Abstract:
A study on the extra-pair fertilizations sought by females in passerine birds shows that males remain in places where females can spot them. Important trade-offs are available to the females who seeks extra-pair fertilization when they are fertilizable. Males announce their presence through songs and visual displays to attract females at the appropriate time. Males keeping anti-predator vigilance as parental efforts advertise their presence simultaneously. The hypothesis highlights the importance of explaining both male and female mating patterns in monogamy theories.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
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Song activity in the chiffchaff: territorial defence or mate guarding?
Article Abstract:
Male chiffchaff dawn singing represents an inter-sexual function during the fertile period rather than a paternity-guard mechanism. A decrease in singing rate during the fertile period suggests that males sing during the fertile period only to contact their female mates. Song in the post-fertile period seems to be used as a declaration of an established territory to the neighbors. Song also permits the male to re-mate in the wake of nest predation or female desertion, while reducing territorial fights.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
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