An Evaluation of Beaver Aging Techniques

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Abstract
Methods of estimating the age of beavers (Castor spp.) based on a combination of pelt size and weight, skull measurements, and several external morphological measurements are evaluated by comparing these criteria with the recent and more reliable dental development technique. The earlier methods permit separation of the young-of-the-year from the remainder of the population, but cannot be effectively used on beavers over 12 months old. Revisions of the dental aging technique are presented as are data on estimating whole weights from skinned beaver carcasses.

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