00000nam 2200000za 4500 9.804801 CaOODSP 20250414083042 cr ||||||||||| 150406s1999 oncdb ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-1/1999-15E-PDF Kieser, R. Review of hydroacoustic methodology and Pacific hake biomass estimates for the Strait of Georgia, 1981 to 1998 [electronic resource] / R. Kieser, M.W. Saunders and K. Cooke. Ottawa : Fisheries and Oceans Canada, 1999. 53 p. : fig., graphs, maps, tables. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/15 Includes bibliographical references (p. 20-23). The purpose of this paper is 1) to make available to assessment scientists a review of the methods used in six acoustic surveys that were completed between 1981 to 1998 to estimate Pacific hake (Merluccius productus) abundance in the Strait of Georgia and 2) to provide a time series of hake biomass standardised to a single target strength value. This includes a description of the evolution of the acoustic system, data collection, analysis, presentation techniques and sources of uncertainty unique to each survey. A method for calculating biomass based on target strength length relation is presented and biomass estimates from all surveys are given. Calibration, target strength and survey data are statistically examined to obtain a representative confidence interval that can be used as a guide for all surveys. gccst Fisheries resources gccst Salt water fish gccst Fishing area gccst Fisheries management Saunders, M. W. Cooke, K. D. Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/15 (CaOODSP)9.507740 PDF 3.65 MB https://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-1999-15-eng.pdf