Sustainability of a harvest can only be determined from accurate information on populations, number of females vs males and rate of reproduction. In this case populations and ratio of males to females is not known with any degree of confidence, despite what you hear about a population of !5,000, the provincial biologist simply do not have the raw data to make such a prediction. This lack of accurate data has been a problem for the last 15 years at least as gov't cutbacks have reduced the number of conservation personnel in the field to near zero.