00000nam 2200000zi 4500 9.895722 CaOODSP 20230501141951 m o d f cr bn||||||||| 210127s1987 nscbd ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-nf n-cn-qu n-cnm-- ln----- Fs70-8/87-64E-PDF Laberge, Estelle, author. Assessment of 4RST redfish (Sebastes spp.) / by Estelle Laberge, Peter J. Rubec, Dominique Gascon, and D. Bruce Atkinson. [Dartmouth, N.S.] : Canadian Atlantic Fisheries Scientific Advisory Committee ; Mont-Joli, Québec : Direction des sciences biologiques, Ministère des pêches et océans, Institut Maurice Lamontagne ; St. John's, Newfoundland : Northwest Atlantic Fisheries Centre, Department of Fisheries and Oceans, [1987?] 1 online resource (45 pages) : maps, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier CAFSAC research document ; 87/64 "Not to be cited without permission of the author(s)." Cover title. Includes bibliographical references (page 9). "Reported landings for the NAFO Divisions 4RST redfish fishery in 1986 were estimated at 33,107 t. Although they constitute a 5,000 t increase from last year, they still represent only 60% of the TAC. Catch rates for bottom trawls (excluding Engels high-lift), Engels high-lift trawls and midwater trawls were analyzed separately using a multiplicative model. The catch rate series shows 2 distinct peaks, one in 1967-1968 (1.33 t/h) and the other in 1981-1982 (1.29 t/h) and have declined since then; the decline appears to have stopped in 1986. Length frequency distributions based on commercial sampling and research survey data show the presence of 2 strong year-classes: one from the early 1970's (fish about 30 cm) and one from the early 1980's (fish about 20 cm). These smaller fish should be recruiting to the fishery in the next few years. The current biomass (beginning of 1987) was estimated from a non-linear version of the Schaefer general production model to be 473,000t. Because of uncertainties with regard to the changes in availability of fish to the gear, and therefore the effort levels implied, the recommended catch for 1988 were set at the 2/3fmey equilibrium yield of 56,000 t"--Abstract, page 2. Includes abstract and series statement in French. Sebastes fisheries Saint Lawrence, Gulf of. Fish stock assessment Saint Lawrence, Gulf of. Sébastes Pêche commerciale Saint-Laurent, Golfe du. Ressources halieutiques Évaluation Saint-Laurent, Golfe du. Canadian Atlantic Fisheries Scientific Advisory Committee, issuing body. Northwest Atlantic Fisheries Centre (Canada), issuing body Maurice Lamontagne Institute, issuing body. CAFSAC research document (Canadian Atlantic Fisheries Scientific Advisory Committee) 87/64. (CaOODSP)9.869616 PDF 1.62 MB https://publications.gc.ca/collections/collection_2021/mpo-dfo/fs70-8/Fs70-8-87-64-eng.pdf