Impaired flight ability prior to egg laying: A cost of being a capital breeder
2005 (English)In: Functional Ecology, ISSN 0269-8463, E-ISSN 1365-2435, Vol. 19, no 1, 98-101 p.Article in journal (Refereed) Published
- 1To 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.
- 2Initially 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.
- 3The increase in flight speed of breeding females was explained by a reduction in wing load during egg-laying.
- 4Zebra 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.
Place, publisher, year, edition, pages
2005. Vol. 19, no 1, 98-101 p.
Bird, capital breeding, predation risk
Research subject Animal Ecology; Zoology; Ethology
IdentifiersURN: urn:nbn:se:su:diva-29089DOI: 10.1111/j.0269-8463.2005.00932.xOAI: oai:DiVA.org:su-29089DiVA: diva2:229101