Field work commenced in early June when a trap sample of animals from several sites showed that breeding was well underway. Population densities at the different sites varied widely; trap-night yields ranged from 0 to 33 percent. Behavioral tests of field trapped animals were made in the laboratory. A second sample of animals was collected starting in late September to assess breeding. Although it is not yet complete, it is obvious that densities again vary widely between fields within a seven mile radius. Material for aging is saved from all animals and some voles are being caged for behavioral observations in the laboratory during the winter. Project Number 183.
Jannett, Jr., Frederick J.
"Social Dynamics of the Montane Vole, Microtus montanus,"
Jackson Hole Research Station Annual Report: Vol. 1972
, Article 26.
Available at: http://repository.uwyo.edu/jhrs_reports/vol1972/iss1/26