Research Document - 2008/025
Can We Calculate Total Allowable Harvests for Walrus Using Potential Biological Removal?
By R.E.A. Stewart
Abstract
DFO was asked by the Nunavut Wildlife Management Board to provide advice on Total Allowable Harvest (TAH) levels for walrus in Nunavut. Given the lack of information available, Potential Biological Removal (PBR) methods were explored, using a generic hunting loss-rate of 30% to convert PBR to landed TAH. Except for West Jones Sound, there were no estimates of population size made within the past 5 years and none of the existing estimates included the entire stock. It is not possible to provide valid scientific advice on TAH for most walrus stocks in Nunavut. Current estimates of minimum population size and hunting losses are required.
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