00000nam 2200000zi 4500 9.875003 CaOODSP 20221107164338 m go d f cr ||||||||||| 190617s1981 nsca o f000 0 eng d CaOODSP eng rda CaOODSP eng fre n-cnm-- Fs70-8/81-18E-PDF Maguire, Jean-Jacques, 1953- Northwest Atlantic mackerel stock assessment - 1981 / by J.J. Maguire. Dartmouth, Nova Scotia : Bedford Institute of Oceanography, Marine Fish Division, Department of Fisheries & Oceans, [1981] 1 online resource (22 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier CAFSAC research document ; 81/18 Digitized edition from print [produced by Department of Fisheries and Oceans]. "Not to be cited without permission of author." Includes bibliographical references. "An index of effort calculated from the USA commercial catch rate was used to fine tune ages 6-7-8 fishing mortalities. A 1980 F = 0.066 was considered to best represent the ages 6 and older stock status. partial recruitment on age 2 was adjusted to obtain a 1978 year-class size at age 1 of 2 billion fish while P.R. on ages 1, 3, 4, and 5 were adjusted to obtain year-class size at age 1 of approximately the smallest size observed. Various Y/R calculations and projections were made. These indicated that a 1982 catch of 115,000 mt would not adversely affect the stock status."--Abstract. Includes abstract in French. gccst Salt water fish gccst Surveys Canada. Department of Fisheries and Oceans. Scotia-Fundy Region. Marine Fish Division‏. Bedford Institute of Oceanography. CAFSAC research document (Canadian Atlantic Fisheries Scientific Advisory Committee) 81/18 (CaOODSP)9.869616 PDF 1.12 MB https://publications.gc.ca/collections/collection_2019/mpo-dfo/Fs70-8-81-18-eng.pdf