00000nam 2200000zi 4500 9.952780 CaOODSP 20250627090807 m o d f cr mn||||||||| 250627e198606##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x5x8 Fs97-4/1889E-PDF Fs97-4/1889E Haist, V., author. Stock assessments for British Columbia herring in 1985 and forecasts of the potential catch in 1986 / by V. Haist, J.F. Schweigert and M. Stocker. Nanaimo, British Columbia : Department of Fisheries and Oceans, Fisheries Research Branch, Pacific Biological Station, June 1986. ©1986 1 online resource (ix, 48 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1889 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (page 48). "Herring stock abundance in British Columbia waters was assessed for 1985, and forecasts were made for 1986 using two methods: (1) escapement method, and (2) age-structured model analysis. The abundance of spawners in the 1985 herring run in British Columbia waters as assessed by the escapement method was 112,000 tonnes. The 1986 run is forecast at 143,000 t with average (1970-85) productivity. The 1986 forecasts for poor and good productivity are 113,400 t and 172,700 t respectively. For the south coast particularly it is anticipated that poor productivity will prevail, due to unfavorable environmental conditions. The forecast biomass of the major migratory stocks from age-structured model analysis for 1986 is 130,300 tonnes. This predicted run size reflects the downward stock trends in the central coast and south coast and the predictions of poor recruitment because of the currently unfavorable environmental conditions for these areas. The recommended 1986 catch level (20% of the weighted 1986 herring run size) for the B.C. coast is 14,800 t. This includes a recommended closure of the west coast of Vancouver Island where forecast stock biomass is below the CUTOFF level and a 800 t fishery in the Strait of Georgia where forecasts are only minimally above CUTOFF levels"--Abstract, page iv. Includes abstracts in English and French. Pacific herring British Columbia Pacific Coast. Pacific herring fisheries British Columbia Pacific Coast. Fish stock assessment British Columbia Pacific Coast. Pacific herring fisheries British Columbia Pacific Coast Forecasting. Hareng du Pacifique Colombie-Britannique Pacifique, Côte du. Hareng du Pacifique Pêche commerciale Colombie-Britannique Pacifique, Côte du. Ressources halieutiques Évaluation Colombie-Britannique Pacifique, Côte du. Hareng du Pacifique Pêche commerciale Colombie-Britannique Pacifique, Côte du Prévision. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 1889. (CaOODSP)9.505211 PDF 776 KB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1889-eng.pdf