Food and reproductive patterns in beach and inland populations of Peromyseus maniculatus

Diet and reproductive status were monitored in beach and inland populations of Peromyscus maniculatus from the Minas Basin area of Nova Scotia during fall 1978 and winter 1978-79. Beach mice supplemented their diet with amphipods. Both Peromyscus populations were reduced in numbers by severe winter conditions, but the data obtained indicated breeding in both populations began in early April 1979. Information on the duration of breeding is inconclusive, but there is evidence that the beach mice were still lactating in early November 1978.