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www.elsevier.de/mambio Original investigation
 

Summary: www.elsevier.de/mambio
Original investigation
Population dynamics of Microtus arvalis in a weed strip
By T. Briner, Nathalie Favre, W. Nentwig and J.-P. Airoldi
Zoological Institute, University of Berne, Berne, Switzerland
Receipt of Ms. 17.11.2005
Acceptance of Ms. 27.7.2006
Abstract
A population of Microtus arvalis Pallas, 1779, living in a weed strip was studied by capture≠recapture
method over a 2-year period. Weed strips are characterized by their linear shape and high vegetation
cover, and are not comparable to the habitats examined in most previous studies on M. arvalis.
Abundance of voles was found to be high in the strip with a maximum of 410 voles/ha known to be
alive in the first year and 641 voles/ha in the successive year. Abundance was minimal in spring and
increased until July. A decrease in population size at the beginning of August was followed by a new
increase in both years. One difference between the 2 years was a pronounced peak abundance at the
end of June in the second year. The peak may be related to a shift in sex ratio in favour of females in
this year (ratio of males:females of 1:8). Also the time of residency of females was significantly
longer in the second year than in the year before, and the survival rate of females was greater than
in males.
The turnover was generally very high and reached maximum values of 80% renewal of population

  

Source: Airoldi, Jean-Pierre - Zoologischen Institut, Universitšt Bern
Richner, Heinz - Zoologischen Institut, Universitšt Bern

 

Collections: Environmental Sciences and Ecology