Does beak color affect female preference in zebra finches?
Article Abstract:
Studies on zebra finches provide conflicting evidence for a bright red beak as being important in mate selection by the females. Studies show that the male display rates also may play an important role in female preference. There are several possible reasons for discrepancy in results. Male display rates may take precedence over the beak color even if the females make use of both these cues. Developmental experiences of interaction with males can lead the females to associate the red beak color with the display rate. The relative importance and interaction of the two factors needs to be examined.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
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Primary and secondary sex ratio manipulation by zebra finches
Article Abstract:
Zebra finches manipulate both their primary and secondary sex ratios relative to food availability for adaptive sexual investment. This was indicated by results of a testing of Trivers and Willard's hypothesis of investing adaptively in offsprings. Females hatched sooner than later from earlier-laid eggs than from later-laid eggs within clutches. When food was restricted, clutch sex ratios were male-biased, but female-biased when food was in excess. Chick mortality was female-biased when food was restricted, but male-biased when food was abundant.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1998
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Disruptions of matings, harassment and lek-breeding in Kafue lechwe antelope
Article Abstract:
A study was conducted to analyze the correlation of the evolution of female antelopes and their sexual preferences. Observations were based on the mating behavior exhibited by a population of Kafue lechwe in Zambia. The results showed higher female mating success in leks than in herds because of less disruption and harassment during mating bouts. They also showed that females in leks were more receptive to sexual attacks by males. The results suggest that offsprings produced have higher mating success because they move in the same territories.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1995
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