00000cam 2200000zi 4500 9.960204 CaOODSP 20260327071619 m o d f cr mn||||||||| 260220t19961996bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc x7x8 Fs97-4/2354E-PDF Fs97-4/2354E Candy, J. R., author. A preliminary report on juvenile chinook production in the Cowichan River during 1993 and 1994 / by J.R. Candy, D.A. Nagtegaal, and B. Riddell. Nanaimo, British Columbia : Department of Fisheries and Oceans, Biological Sciences Branch, Pacific Biological Station, 1996. ©1996 1 online resource (viii, 80 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 2354 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 14-16). "As part of an ongoing study to assess the productivity of chinook salmon (Oncorhynchus tshawytscha) in the Cowichan River, the Department of Fisheries and Oceans, Pacific Biological Station, began monitoring the downstream migration of chinook juveniles in 1991. Inclined-plane traps and auger traps were used in 1993 and 1994 to collect information on growth, abundance and migration timing. For both years, trap catch was expanded using two methods to give estimates of hatchery and naturally-spawned chinook migrants. The cross-sectional area method estimated 60-61% and the trap-efficiency method estimated 23-36% of known numbers of hatchery fish released above the trapping site. The production of naturally-spawned chinook juveniles was estimated at 350,000-430,000 in 1993 and 130,000-170,000 in 1994. The Cowichan hatchery released approximately 2.9 million juvenile chinook/year. Hatchery migrants tend to move downstream in a large pulse and most of the hatchery fish appeared in the estuary within a week after release"--Abstract, page vii. Includes abstracts in English and French. Chinook salmon Infancy British Columbia Cowichan River. Chinook salmon Migration British Columbia Cowichan River. Chinook salmon Marking British Columbia Cowichan River. Hatchery fishes British Columbia Cowichan River. Hatchery releases British Columbia Cowichan River. Saumoneau quinnat Colombie-Britannique Cowichan, Fleuve. Saumon quinnat Migration Colombie-Britannique Cowichan, Fleuve. Saumon quinnat Marquage Colombie-Britannique Cowichan, Fleuve. Poissons d'élevage Colombie-Britannique Cowichan, Fleuve. Lâchers de poissons d'élevage Colombie-Britannique Cowichan, Fleuve. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 2354. (CaOODSP)9.505211 PDF 1.98 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs97-4/Fs97-4-2354-eng.pdf