• Sheppe, Walter


Colonies of mice, Peromyscus leucopus, often began to breed soon after being introduced to previously uninhabited islands in midsummer, although natural populations were not breeding at this season. This breeding began when population densities were higher than those of natural populations and continued until densities far higher than those of natural populations were reached. This unusual breeding may have been caused by the disruption of social structure produced by the colonization.


Livetrapping, established colonies on uninhabitated islands