00000nam 2200000zi 4500 9.889490 CaOODSP 20221107172312 m o d f cr bn||||||||| 200717q1981 nscd ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cn--- Fs70-8/81-81E-PDF Zwanenburg, Kees Cornelis Tieleman, 1954- author. Eastern Canadian grey seal (Halichoerus Gryplus) research report and 1980 stock assessment / K. Zwanenburg, B. Beck and S.J. Smith. [Dartmouth, N.S.] : [Canadian Atlantic Fisheries Scientific Advisory Committee], [1981] 1 online resource (38 pages) : graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier CAFSAC research document ; 81/81 "Not to be cited without permission of author(s)." Digitized edtion from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references. "The present document reviews the research which has been carried out on grey seals in eastern Canada during the 1979-1981 period, and presents an assessment of the population to 1980. This assessment is based on a number of data sources which will be detailed in the text. Foremost among these are the results of five years of complete cohort tagging carried out on Sable Island, Nova Scotia. The results of these tagging studies were used to estimate total pup production in eastern Canada, to provide guidelines for fine tuning of cohort analyses, and to estimate patterns of natural mortality in the population. The results of these analyses indicate that the level of the population in 1980 stood at between 44,000 and 48,000 age 1+ individuals with no evidence of any decline in population numbers or pup production in the past several years"--Abstract, page [1]. Includes abstract in French. Gray seal Atlantic Coast (Canada) Marine mammal populations Estimates Atlantic Coast (Canada) Phoque gris Atlantique, Côte de l' (Canada) Mammifères marins Populations Estimation Atlantique, Côte de l' (Canada) Canadian Atlantic Fisheries Scientific Advisory Committee. CAFSAC research document (Canadian Atlantic Fisheries Scientific Advisory Committee) 81/81. (CaOODSP)9.869616 PDF 11.68 MB https://publications.gc.ca/collections/collection_2020/mpo-dfo/Fs70-8-81-81-eng.pdf