00000nam 2200000zi 4500 9.937768 CaOODSP 20251203095404 m o d f cr ||||||||||| 240506t19881988bcca||||ob f000 0 eng d CaOODSP eng rda CaOODSP eng fre eng FS97-4/1977E-PDF FS97-4/1977E Nagtegaal, D. A. (Dick A.) author. A Pilot study to estimate total chinook mortality associated with seine fishing in Johnstone Strait during 1986 / by D.A. Nagtegaal, P.J. Starr, and B. Riddell. Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, March 1988. ©1988 1 online resource (iv, 55 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, No. 1977 Includes bibliographical references. In 1986 a pilot study was conducted in the Johnstone Strait sockeye seine fishery to assess total chinook mortality. Catch statistics presently recorded are determined from records of chinook sales and are suspected to underestimate the catch of small (3 to 5 lbs.) and adult (over 5 lbs.) chinooks, and seriously underestimate the total mortality of all chinook. Data were collected for catch per seine set by species and size categories of chinook, the number of sets made by vessels per day, and the total number of vessels per day active in the fishery. Calculation of total catch involved extrapolating the estimated mean catch per set over all sets made and incorporated the Monte-Carlo bootstrap technique to determine the mean catch estimate and 95% confidence interval. Includes abstract in French and in English. Fishing nets. Filets de pêche. Canada. Department of Fisheries and Oceans, issuing body. Canadian manuscript report of fisheries and aquatic sciences ; No. 1977 (CaOODSP)9.505211 PDF 982 KB https://publications.gc.ca/collections/collection_2024/mpo-dfo/Fs97-4-1977-eng.pdf