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Fat reserves and health state in migrant Goldcrest Regulus regulus
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolutionary Biology, Animal Ecology.
1995 (English)In: Functional Ecology, ISSN 0269-8463, E-ISSN 1365-2435, Vol. 9, no 6, 842-848 p.Article in journal (Refereed) Published
Abstract [en]

1. Although the importance of adequate fat deposits for migrating birds has long been recognized, little is known about causes of intraspecific variation in the size of energy reserves. 2. We studied individual variation in visible fat reserves, body size, state of health and nutrition among autumn migrating Goldcrests Regulus regulus. 3. Birds showing signs of infectious/inflammatory diseases (high red blood cell sedi- mentation rate) or anaemia (low packed red blood cell volume) had significantly smaller fat stores than birds lacking these signs. However, no differences in fat reserves or health state were detected in relation to stage of post-juvenile moult. 4. These results suggest that the ability to deposit fat in the face of an energetically demanding migration may be affected by an individual's state of health.

Place, publisher, year, edition, pages
1995. Vol. 9, no 6, 842-848 p.
Keyword [en]
Body size, diseases, energy storage, migration, serology
National Category
Natural Sciences
URN: urn:nbn:se:uu:diva-84370OAI: oai:DiVA.org:uu-84370DiVA: diva2:112278
Available from: 2008-10-17 Created: 2008-10-17 Last updated: 2013-10-08Bibliographically approved

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