Does agricultural food provide a good alternative to a natural diet for body store deposition in geese?

Eichhorn, G., Meijer, H. A. J., Oosterbeek, K. and Klaassen, Marcel 2012, Does agricultural food provide a good alternative to a natural diet for body store deposition in geese?, Ecosphere, vol. 3, no. 4, pp. 1-13, doi: 10.1890/ES11-00316.1.

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Title Does agricultural food provide a good alternative to a natural diet for body store deposition in geese?
Author(s) Eichhorn, G.
Meijer, H. A. J.
Oosterbeek, K.
Klaassen, MarcelORCID iD for Klaassen, Marcel
Journal name Ecosphere
Volume number 3
Issue number 4
Start page 1
End page 13
Total pages 13
Publisher Ecological Society of America
Place of publication Washington, D.C.
Publication date 2012-04
ISSN 2150-8925
Keyword(s) Agriculture
Amino acid profile
Body composition
Body stores
Branta leucopsis
Global change
Habitat shift
Stable isotopes
Wadden Sea
Summary Over the past decades most goose populations have become increasingly dependent on agricultural crops during wintering and migration periods. The suitability of agricultural crops to support all nutritional requirements of migratory geese for the deposition of body stores has been questioned; feeding on agricultural crops may yield higher rates of fat deposition at the cost of reduced protein accretion due to an unbalanced diet. We compared amino-acid composition of forage, and investigated food-habitat use and dynamics and composition of body stores deposited by barnacle geese feeding on agricultural pasture and in natural salt marsh during spring migratory preparation. Overall content and composition of amino acids was similar among forage from both habitats and appeared equally suitable for protein accretion. There was no relationship between body composition of geese and their preferred food habitat. Fat and wet protein contributed with 67% and 33%, respectively, to body stores gained at a rate of 11 g/d throughout the one-month study period. We found no evidence of impaired protein accretion in geese using agricultural grassland compared to natural salt marsh. Our study supports the hypothesis that the expansion of feeding habitat by including agricultural grassland has played an important role in the recent growth of the East Atlantic flyway population of barnacle geese and other herbivorous waterbirds. Feeding refuges of improved grassland provide geese with an adequate diet for the deposition of body stores crucial for spring migration and subsequent reproduction, thereby alleviating the conflict with agriculture.
Language eng
DOI 10.1890/ES11-00316.1
Field of Research 059999 Environmental Sciences not elsewhere classified
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2012, Eichhorn et al.
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