00000nam 2200000zi 4500 9.950424 CaOODSP 20250528081740 m o d f cr mn||||||||| 250424e198205##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x8x8 Fs97-4/1661E-PDF Fs97-4/1661 Thompson, J. M., author. Distribution and abundance of Pacific hake and walleye pollock in the Strait of Georgia, March 24-May 2, 1981 / by J.M. Thompson and G.A. McFarlane. Nanaimo, British Columbia : Department of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, May 1982. ©1982 1 online resource (iv, 79 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1661 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 9-10). "Swept-volume midwater trawl surveys were carried out in two areas of the Strait of Georgia during March 24-May 2, 1981, to determine the absolute abundance and distribution of Pacific hake (Merluccius productus) and walleye pollock (Theragra chalcogramma) during the spawning period. A total estimated biomass of 139,000 t and 85,000 t were present in Winchelsea Island-Sand Heads area during March 24-April 4 and April 22-May 2, respectively. Pacific hake accounted for 125,600 t and 84,400 t of the total biomass during these times. In the Active Pass-Point Roberts area a total estimated biomass of 12,700 t was present during April 9-12. Hake accounted for 4,400 t at this time. During all surveys, two distinct midwater layers were present throughout the study area. Hake, pollock, and spiny dogfish (Squalus acanthias) comprised nearly all catches made in these layers. Hake dominated, except in the Point Roberts area south of a line between Point Roberts and Mayne Island"--Abstract, page iii. Includes abstracts in English and French. Pacific hake Georgia, Strait of (B.C. and Wash.) Walleye pollock Georgia, Strait of (B.C. and Wash.) Pacific hake Georgia, Strait of (B.C. and Wash.) Geographical distribution. Walleye pollock Georgia, Strait of (B.C. and Wash.) Geographical distribution. Fish populations Estimates Georgia, Strait of (B.C. and Wash.) Fish surveys Georgia, Strait of (B.C. and Wash.) Merlu du Pacifique Géorgie, Détroit de (C.-B. et Wash.) Goberge de l'Alaska Géorgie, Détroit de (C.-B. et Wash.) Merlu du Pacifique Géorgie, Détroit de (C.-B. et Wash.) Distribution géographique. Goberge de l'Alaska Géorgie, Détroit de (C.-B. et Wash.) Distribution géographique. Poissons Populations Estimation Géorgie, Détroit de (C.-B. et Wash.) Inventaires ichtyologiques Géorgie, Détroit de (C.-B. et Wash.) Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 1661. (CaOODSP)9.505211 PDF 3.30 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1661-eng.pdf