• Coutu, D. James
  University of Maine Graduate School
  

The study was undertaken to determine the rate of reproduction of beaver in Maine for the years 1959 and 1960. The objectives of the investigation were to determine any changes in the overall rate of reproductin since 1947-1950, to investigate possible differences in reproduction between beaver of different climatic zones, and to compare the reproductive rate between large and small beaver. A comparison of the averages showed that: (1) the reproductive rate in Maine beaver has not changed statistically in the past decade; (2) beaver of the Central Zone produced significantly more young than did those of the Northern Zone; and (3) measurable differences occurred beetween large and small beaver of the Northern Zone, and between the total number of lare and small beaver.