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Assessing body condition and energy budget components by scoring abdominal profiles in free-ranging pink-footed geese Anser brachyrhynchus

journal contribution
posted on 01.05.2006, 00:00 authored by J Madsen, Marcel KlaassenMarcel Klaassen
An 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 biology

Volume

37

Issue

3

Pagination

283 - 287

Publisher

Wiley-Blackwell Munksgaard

Location

Copenhagen, Denmark

ISSN

0908-8857

eISSN

1600-048X

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2006, Journal of avian biology