File(s) under permanent embargo
Assessing body condition and energy budget components by scoring abdominal profiles in free-ranging pink-footed geese Anser brachyrhynchus
journal contribution
posted on 2006-05-01, 00:00 authored by J Madsen, Marcel KlaassenMarcel KlaassenAn abdominal profile index (API) was developed for pink-footed geese Anser brachyrhynchus as a measure of body condition. On basis of carcass analysis of 56 adult geese with known API prior to collection, we found significant linear relationships between API against body mass, abdominal fat and total energy content. Hence, changes in API reflect net energy intake rates. As an example of the applicability of the calibration, we compared APIs of individually marked geese before and after long migration episodes and estimated the cost of flight at 8.9 kJ/km. In addition we estimated gain rates at three major staging sites along the spring flyway indicating an increase in fueling rates with latitude. Calibration of APIs and energy contents offers new opportunities for field studies of waterfowl energetics.
History
Journal
Journal of avian biologyVolume
37Issue
3Pagination
283 - 287Publisher
Wiley-Blackwell MunksgaardLocation
Copenhagen, DenmarkPublisher DOI
ISSN
0908-8857eISSN
1600-048XLanguage
engPublication classification
C1.1 Refereed article in a scholarly journalCopyright notice
2006, Journal of avian biologyUsage metrics
Categories
No categories selectedLicence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC