Effects of Food Supplementation on Rodents in Winter

We evaluated the role of food availability on population parameters of rodents in agroecosystems in the Pampas of Argentina by mark-recapture studies in six crop-field borders; three controls and three areas with supplemental food. Akodon azarae, the pampean grassland mouse, in supplemented borders...

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Bibliographic Details
Published in:Journal of mammalogy 1994, Vol.75 (2), p.446-453
Main Authors: Cittadino, Emilio A., de Carli, Pedro, Busch, María, Kravetz, Fernando O.
Format: Article
Language:English
Subjects:
Agricultural ecosystems
Akodon azarae
Animal and plant ecology
Animal ecology
Animal physiology
Animal populations
Animal, plant and microbial ecology
Animals
Average linear density
Biological and medical sciences
Demecology
Density
Dietary supplements
Food
Food availability
Food supply
Fundamental and applied biological sciences. Psychology
Mammalia
Mass
Mice
Rodentia
Rodents
Vertebrata
Winter
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Summary:We evaluated the role of food availability on population parameters of rodents in agroecosystems in the Pampas of Argentina by mark-recapture studies in six crop-field borders; three controls and three areas with supplemental food. Akodon azarae, the pampean grassland mouse, in supplemented borders exhibited increased density, more immigration, greater persistence, greater proportion of pregnant females, and increase in mean mass and length. We conclude that food availability is a factor contributing to winter reduction and slow springtime increase in density of A. azarae.
ISSN:0022-2372
1545-1542
1545-1542
0022-2372
DOI:10.2307/1382566