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Effect of supplemental food on a cyclic Clethrionomys glareolus population at peak density
Umeå University, Department of Animal Ecology.
Umeå University, Department of Animal Ecology.
1996 (English)In: Acta Theriologica, ISSN 0001-7051, E-ISSN 2190-3743, Vol. 41, no 4, p. 383-394Article in journal (Refereed) Published
Abstract [en]

The impact of supplemental food on a cyclic bank vole Clethrionomys glareolus (Schreber, 1780) population was studied at peak density. We provided high energy food (sunflower seeds) to a 3.15 ha live-trapping grid and used a 5.06 ha unfed grid as a control. Density of adult females and immatures increased 3-fold in response to the extra food. In contrast, density of adult males did not change significantly. The rise in density of adult females, but not of adult males, altered the functional sex ratio. Loss rate of fed adults remained the same as for controls, whereas immature loss rate was reduced by the extra food. Dispersal of immatures from the control into the food supplemented grid was higher than the reverse. Growth and body mass of fed immatures were lower than of controls. Reduced dispersal and increased immigration of immatures both contributed significantly to the overall rise in density when food was added.

Place, publisher, year, edition, pages
1996. Vol. 41, no 4, p. 383-394
National Category
Geochemistry
Research subject
Applied Geology
Identifiers
URN: urn:nbn:se:ltu:diva-5463Local ID: 390fd070-c531-11dd-80bd-000ea68e967bOAI: oai:DiVA.org:ltu-5463DiVA, id: diva2:978337
Note
Godkänd; 1996; 20081208 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-21Bibliographically approved

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