00000nam 2200000zi 4500 9.949172 CaOODSP 20250324071802 m o d f cr mn||||||||| 250317e198407##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x8x8 Fs97-6/1289E-PDF Fs97-6/1289E Mason, J. C. (John Christopher), 1932- author. Estimating the spawning stocks of Pacific hake (Merluccius productus) and walleye pollock (Theragra chalcogramma) in the Strait of Georgia, B.C. from their released egg production / by J.C. Mason, A.C. Phillips, and O.D. Kennedy. Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, July 1984. ©1984 1 online resource (iv, 51 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 0706-6475 ; no. 1289 ISSN of series should read: 0706-6457. Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 9-11). "Ichthyoplankton surveys were carried out in the Strait of Georgia, B.C. during their common spawning season (Feb.-June) for endemic stocks of Pacific hake and walleye pollock, in 1981. The objective was to estimate the magnitude of the spawning stocks in the central and southern regions of the strait by the egg production method. A grid of 80 stations was sampled using Bongo gear every two weeks on nine cruises from late February to mid-June. Annual released egg production amounted to 1.84 x 10¹³ pollock eggs and 3.78 x 10¹³ hake eggs. Magnitude of spawning in northern Georgia Strait south of Campbell River is estimated at <5% and <15% of that for pollock and hake, respectively, in the central and southern strait. From associated fecundity and population parameters of sex ratio, and mean length and weight, the adult stocks are estimated to comprise 96.2 million pollock (60.5 kt) and 390 million hake (182.6 kt) in the strait south of Texada Island"--Abstract, page iii. Includes abstracts in English and French. Pacific hake Eggs Counting Georgia, Strait of (B.C. and Wash.) Walleye pollock Eggs Counting Georgia, Strait of (B.C. and Wash.) Fish stock assessment Georgia, Strait of (B.C. and Wash.) Merlu du Pacifique Œufs Comptage Géorgie, Détroit de (C.-B. et Wash.) Goberge de l'Alaska Œufs Comptage Géorgie, Détroit de (C.-B. et Wash.) Ressources halieutiques Évaluation Géorgie, Détroit de (C.-B. et Wash.) Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian technical report of fisheries and aquatic sciences ; no. 1289. (CaOODSP)9.504449 PDF 2.00 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1289-eng.pdf