00000nam 2200000zi 4500 9.953235 CaOODSP 20251027102754 m o d f cr mn||||||||| 250715e198705##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x8x8 Fs97-4/1940E-PDF Fs97-4/1940E McCarter, P. B., author. Hydroacoustic herring survey results and trawl catches from Hecate Strait, November 26 to December 12, 1985, G.B. Reed cruise GBR85E and M.V. Sunnfjord cruise SUN85-1 / by P.B. McCarter, R. Kieser, D.E. Hay, and D.C. Miller. Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, May 1987. ©1987 1 online resource (iv, 131 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1940 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 6-7). "Northern coastal waters where herring overwinter off Porcher Island and SE Moresby Island were surveyed hydroacoustically to estimate herring abundance and distribution patterns. Total midwater biomass estimates for herring were 32,000 tonnes on the northern mainland side of Hecate Strait and 9,500 tonnes off SE Moresby Island. Repeated hydroacoustic soundings over a 24-h period showed that vertical and perhaps shoreward movements of herring during dark hours resulted in lower estimates as fish moved out of the echo integration zone. During daylight hours, herring located near or on very irregular sea bottom could not be acoustically estimated because of bottom echo interference. Vessel avoidance, species compositions of trawl and bongo net catches, stomach contents and size and age distributions of herring were also examined. Oceanographic data were collected at eight hydrographic and plankton stations"--Abstract, page iii. Includes abstracts in English and French. Pacific herring British Columbia Hecate Strait. Fish populations Estimates British Columbia Hecate Strait. Fish surveys British Columbia Hecate Strait. Hareng du Pacifique Colombie-Britannique Hécate, Détroit d'. Poissons Populations Estimation Colombie-Britannique Hécate, Détroit d'. Inventaires ichtyologiques Colombie-Britannique Hécate, Détroit d'. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 1940. (CaOODSP)9.505211 PDF 3.38 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1940-eng.pdf