00000cam 2200000zi 4500 9.960088 CaOODSP 20260219141049 m o d f cr mn||||||||| 260218t19941994bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc x7x9 Fs97-4/2268E-PDF Fs97-4/2268E Nagtegaal, D. A. (Dick A.) author. A preliminary report on the chinook productivity study conducted on the Cowichan River during 1992 / by D.A. Nagtegaal, J. Candy and B. Riddell. Nanaimo, British Columbia : Biological Sciences Branch, Department of Fisheries and Oceans, Pacific Biological Station, 1994. ©1994 1 online resource (viii, 73 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; 2268 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 16-17). "In 1992, the Biological Sciences Branch, Pacific Biological Station, conducted a study of chinook salmon (Oncorhynchus tshawytscha) productivity in the Cowichan River. Major components of this ongoing study include: i) enumeration of spawners, ii) estimation of native food fish catch, iii) recording hatchery broodstock removals, iv) biological sampling and coded-wire tag (CWT) data collection. A mark-recapture study was conducted to augment the fence count. Total return of adult chinook to the Cowichan River was estimated to be 8,678 in 1992. The total return was determined to be the sum of the fence count, the Native food fish catch, and the numbers of broodstock removed below the fence. The number of natural spawners was estimated as 6,676. These were considered minimum estimates since the enumeration fence was washed out due to high water levels prior to the end of the run. Fishery Officers estimated the adult chinook return to be 7,500. In addition, a water management plan is described which was intended to aid upstream movement of chinook"--Abstract, page vii. Includes abstracts in English and French. Chinook salmon British Columbia Cowichan River. Escapement (Fisheries) British Columbia Cowichan River. Chinook salmon Counting British Columbia Cowichan River. Chinook salmon Marking British Columbia Cowichan River. Hatchery fishes British Columbia Cowichan River. Saumon quinnat Colombie-Britannique Cowichan, Fleuve. Échappée (Pêches) Colombie-Britannique Cowichan, Fleuve. Saumon quinnat Comptage Colombie-Britannique Cowichan, Fleuve. Saumon quinnat Marquage Colombie-Britannique Cowichan, Fleuve. 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 ; 2268. (CaOODSP)9.505211 PDF 3.19 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs97-4/Fs97-4-2268-eng.pdf