Research Document - 2008/022

On determining the Total Allowable Catch for Nunavut odontocete stocks

By P.R. Richard

Abstract

Most odontocete (narwhal and beluga) population assessments in Nunavut are data-poor, meaning that there is often only one survey of their population size, no trend data, and little information on their population dynamics. As a result, Total Allowable Catches for Nunavut odontocete whales were calculated using the Potential Biological Removal (PBR) method. The PBR results were also compared to simple growth model used to determine the risk probability of decline. In this model, uncertainty distributions were used to model the imprecision of population size and hunting loss rate and to model uncertainty in the population growth rate.

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