00000nam 2200000zi 4500 9.951412 CaOODSP 20250527151119 m o d f cr mn||||||||| 250527e198408##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x8x8 Fs97-4/1715E-PDF Fs97-4/1715 Kieser, R., author. Hydroacoustic biomass estimates of bathypelagic groundfish in Georgia Strait, January, February, and April, 1981 / by R. Kieser. Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, August 1983. ©1983 1 online resource (iv, 84 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1715 Errata sheet inserted. Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 10-11). "Hydroacoustic echo integration surveys were carried out in the Strait of Georgie to determine the absolute abundance and distribution of Pacific hake (Merluccius productus) and walleye pollock (Theragra chalcogramma). The prespawning and spawning periods of the target species were covered by the cruises in January, February, and April 1981. Total biomass was estimated as 67, 88, and 112 kt for the three months, respectively. Pacific hake accounted for 73, 86, and 71% of the estimates. Hake, pollock, and dogfish (Squalus acanthias) accounted for almost the entire catches that were made for species identification. The echogram and catches indicated two distinct midwater layers during all surveys. In April, a dense plankton layer was present in the shallow layer"--Abstract, page iv. Includes abstracts in English and French. Pacific hake Georgia, Strait of (B.C. and Wash.) Walleye pollock Georgia, Strait of (B.C. and Wash.) Spiny dogfish Georgia, Strait of (B.C. and Wash.) 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.) Aiguillat commun Géorgie, Détroit de (C.-B. et Wash.) 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. 1715. (CaOODSP)9.505211 PDF 2.36 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1715-eng.pdf