00000nam 2200000zi 4500 9.950292 CaOODSP 20250530144656 m o d f cr mn||||||||| 250422e198102##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x5x7 Fs97-4/1599E-PDF Fs97-4/1599 Ketchen, K. S., author. Reconstruction of Pacific ocean perch (Sebastes alutus) stock history in Queen Charlotte Sound. Part II, Catch per unit of effort as a measure of abundance, 1959-79 / by K.S. Ketchen. Nanaimo, British Columbia : Department of Fisheries and Oceans, Resource Services Branch, Pacific Biological Station, February 1981. ©1981 1 online resource (vi, 72 pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; no. 1599 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 17-18). "Statistics of the Canadian fishery for Pacific ocean perch (Sebastes alutus) in Queen Charlotte Sound have been used to develop a new CPUE measure of relative abundance. This index is positively correlated with an earlier one based on the performance of a U.S. fishing fleet and is compatible with independent, provisional estimates of available biomass. A rapid decline in abundance occurred between 1965 and the early 1970s, a period of relatively heavy removals. By the late 1970s catch as well as total effort had reached its lowest point since the inception of fishing in the early 1950s. It is too soon to conclude that a modest reversal of the CPUE trend is a reflection of stock recovery. The new index of abundance has been applied to a range of estimates of total removals (required because of uncertainty about the reliability of reported foreign catch) to obtain a range of estimates of total fishing effort. These data are to be used in further stock assessment studies and reported in this publication series"--Abstract, page iii. Includes abstracts in English and French. Pacific ocean perch fisheries British Columbia Queen Charlotte Sound. Fisheries Catch effort British Columbia Queen Charlotte Sound. Fish stock assessment British Columbia Queen Charlotte Sound. Sébaste à longue mâchoire Pêche commerciale Colombie-Britannique Reine-Charlotte, Bassin de la. Pêches Mortalité par pêche Colombie-Britannique Reine-Charlotte, Bassin de la. Ressources halieutiques Évaluation Colombie-Britannique Reine-Charlotte, Bassin de la. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; no. 1599. (CaOODSP)9.505211 PDF 913 KB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-4/Fs97-4-1599-eng.pdf