00000cam 2200000za 4500 9.806220 CaOODSP 20260219114440 cr ||||||||||| 150406s2000 oncd ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-1/2000-148E-PDF Swain, D. P. Spawning stock characteristics and cod recruitment success in the southern Gulf of St. Lawrence [electronic resource] / D.P. Swain and G.A. Chouinard. Ottawa : Fisheries and Oceans Canada, 2000. 14 p. : fig., graphs, tables. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/148 Includes bibliographic references (p. 7). Recruitment rate (defined here as R, the abundance of 3 year old cod, divided by S, the biomass of the spawning stock that produced them) has varied widely for cod in the southern Gulf of St. Lawrence. In particular, the rate of recruitment was remarkably high from the mid 1970s to the early 1980s. Variation in the recruitment rate R/S, may reflect variation in early survival of cod, or variation in the quantity or quality of eggs produced by a unit of spawning stock biomass. This paper tests two predictions related to effects of spawner characteristics on recruitment rate. First, a positive correlation between recruitment rate and measures of the age of spawners (i.e., mean age, proportion of older fish, age diversity) is predicted. The second prediction is of a positive correlation between recruitment rate and measures of the mean size and condition of spawners. gccst Fisheries resources gccst Salt water fish gccst Fishing area gccst Fisheries management Chouinard, G. A. (Ghislain André) Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/148 (CaOODSP)9.507740 PDF 80 KB https://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-2000-148-eng.pdf