Abstract
After fifty years of legal protection of the beaver (Castor canadensis canadensis Kuhl), annual midwinter trapping in Vermont was begun in 1950. At this same time, the Vermont Fish and Game Service began collecting carcasses from trappers for the purpose of analyzing the reproductive tracts and skulls, hoping principally to discover means of improving management of the beaver population in the State. Analysis of these carcasses was made in the Zoology Laboratory of the University of Vermont and the results are described here. I thank Mr. Frank T. Haseltine, Project Leader of the Vermont Fish and Game Service, and all others of this group for their aid, including dissection of the carcasses. Helpful criticisms were made by Mr. Malcolm W. Coulter, Maine Cooperative Wildlife Research Unit, Professors Paul A. Moody and Lyman S. Rowell, University of Vermont, and Professors Samuel L. Leonard and Perry W. Gilbert, Cornell University. I...
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