00000nam 2200000zi 4500 9.950106 CaOODSP 20250423144526 m o d f cr mn||||||||| 250414e198706##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc Fs97-6/1573E-PDF Fs97-6/1573E Johnston, N. T., author. Instream indexing of coho salmon (Oncorhynchus kisutch) escapement in French Creek, British Columbia / by N.T. Johnston, J.R. Irvine, and C.J. Perrin. West Vancouver, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, West Vancouver Laboratory, June 1987. ©1987 1 online resource (vi, 37 pages) : illustrations, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 0706-6457 ; no. 1573 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 25-27). "We evaluated the utility of instream indexing for estimating coho escapements in a small river system for which there were independent estimates of escapement from fence counts and mark-recapture surveys. We compared three survey designs (simple random sampling, spawning ground sampling, and "index area" sampling), three sampling unit sizes (100, 200, and 400 m), and four methods of estimation (peak livecounts, peak live plus accumulated dead counts, total dead counts, and area-under-the-curve), using visual count data obtained by foot surveys. We also compared the counting efficiencies of different observers, and examined the relation between visual estimates of coho density and densities obtained by electrofishing. …"--Abstract, page iv. Includes abstracts in English and French. Escapement (Fisheries) British Columbia Vancouver Island. Coho salmon Counting British Columbia Vancouver Island. Coho salmon Migration British Columbia Vancouver Island. Échappée (Pêches) Colombie-Britannique Vancouver, Île de. Saumon coho Comptage Colombie-Britannique Vancouver, Île de. Saumon coho Migration Colombie-Britannique Vancouver, Île de. Canada. Department of Fisheries and Oceans, issuing body. Canada. Department of Fisheries and Oceans. West Vancouver Laboratory, issuing body. Canadian technical report of fisheries and aquatic sciences ; no. 1573. (CaOODSP)9.504449 PDF 1.34 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1573-eng.pdf