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- Title
Impaired flight ability prior to egg-laying: a cost of being a capital breeder.
- Authors
Kullberg, C.; Jakobsson, S.; Kaby, U.; Lind, J.
- Abstract
1. To investigate flight ability in captive Zebra Finches during reproduction we compared change in escape take-off ability and wing load of reproducing females with their mates and non-reproducing females when attacked by a model raptor.2. Initially females had 18% higher wing load than males. Non-reproducing females and females that had started egg-laying flew slower than males. Reproducing females reduced wing load during egg-laying and flew faster when the clutch was completed. Non-breeding females remained on high wing load and flow slower than breeding females that had completed their clutch.3. The increase in flight speed of breeding females was explained by a reduction in wing load during egg-laying.4. Zebra Finches use accumulated reserves to produce eggs and pay a cost in terms of reduced flight ability, but then regain flight performance when the clutch is laid, probably demonstrating a predation cost of capital breeding in birds.Functional Ecology(2005)19, 98–101
- Subjects
BREEDING; SONGBIRDS; SEX (Biology); ENVIRONMENTAL sciences; POPULATION biology; EMBRYOLOGY
- Publication
Functional Ecology, 2005, Vol 19, Issue 1, p98
- ISSN
0269-8463
- Publication type
Article
- DOI
10.1111/j.0269-8463.2005.00932.x