00000nam 2200000za 4500 9.846173 CaOODSP 20221107153133 cr ||||||||||| 171026s2017 oncbd obs f000 0 eng d CaOODSP eng eng fre n-cn-qu n-cnm-- Fs70-5/2017-052E-PDF Grey seal population trends in Canadian waters, 1960-2016 and harvest advice [electronic resource] / M.O. Hammill ... [et al.]. Ottawa : Fisheries and Oceans Canada, Canadian Science Advisory Secretariat, 2017. v, 30 p. : col. charts, map Canadian Science Advisory Secretariat (CSAS), research document, 1919-5044 ; 2017/052, Quebec Region Cover title. “October 2017.” Includes bibliographical references (p. 24-26). “A model of grey seal population dynamics was fitted to pup production estimates for the Sable Island, Coastal Nova Scotia (CNS), and Gulf of St. Lawrence (GSL) seal herds to provide estimates of the Canadian component of the Northwest Atlantic grey seal population from 1960 to 2016. Total grey seal pup production in 2016 estimated by the model was 101,500. The 2016 sex-ratio adjusted total population is 424,300. The estimated 2016 total population on the Scotian Shelf was 380,300, and 44,100, for the GSL. The models predict that the population size continues to increase at an overall rate of 4.4% per year, due primarily to the increase on Sable Island. Total allowable removals depend on the age structure of the harvest and the objective of the removals. In the GSL, harvests of 4,500 and 2,400 animals comprising 95% young of the year (YOY) and 70% YOY, respectively, would meet the current management objective. For the Scotian Shelf (combined Sable Island and CNS herds), harvests of 30,000 and 17,000 animals comprising 95% YOY and 70% YOY, respectively, would meet the current management objective"--Abstract, p. iv. Includes abstract in French. gccst Seals gccst Animal populations gccst Fisheries management Hammill, M. O. (Michael O.) Canada. Department of Fisheries and Oceans. Canadian Science Advisory Secretariat. Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2017/052, Quebec Region (CaOODSP)9.507396 PDF 1.05 MB https://publications.gc.ca/collections/collection_2017/mpo-dfo/Fs70-5-2017-052-eng.pdf