00000cam 2200000zi 4500 9.964328 CaOODSP 20260717145603 m o d f cr mn||||||||| 260717t20002000bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x7x9 Fs97-4/2516E-PDF Fs97-4/2516E Campbell, A., author. Quota estimates for the 1998 red sea urchin fishery in British Columbia / by A. Campbell, D. Bureau, and D. Brouwer. Nanaimo, British Columbia : Fisheries and Oceans Canada, Science Branch, Pacific Region, Pacific Biological Station, 2000. ©2000 1 online resource (iv, 31 pages) : illustrations, map. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; 2516 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 9-12). "Annual landings of red sea urchin (Strongylocentrotus franciscanus) increased rapidly in the early 1980s for the south coast of British Columbia (B.C.) and in the late 1980s for the north coast, but subsequently were reduced and stabilized by arbitrary quotas. Coastwide landings were 6272 t valued at $12.4 M (Cdn.), with 109 licenses issued during 1996. Data from harvest logbooks indicated that there were no clear trends in annual CPUE (kilogram per diver hour) over the 1984-1996 period in each statistical area or general region in B.C. Bed areas were obtained by digitizing locations on charts indicated in harvest logbooks. Analyses of recent surveys and review of published survey reports provided estimates of density and mean weights allowing preliminary estimates of red sea urchin biomass in B.C. Recent published reports on growth rates indicate red sea urchin may grow at a slower rate and that natural mortality could be lower than previously reported. Assuming natural mortality rates between 0.05 and 0.10, and with estimated biomass, preliminary quota options were calculated between 2,673 t and 5,140 t for red sea urchins in B.C. Further surveys for red sea urchin density, especially in the south coast of B.C., and more accurate estimates of red sea urchin bed areas, natural mortality and recruitment rates are required"--Abstract, page iii. Includes abstracts in English and French. Red sea urchin fisheries British Columbia Pacific Coast. Red sea urchin fisheries British Columbia Pacific Coast Management. Sea urchin populations British Columbia Pacific Coast. Oursin rouge Pêche commerciale Colombie-Britannique Pacifique, Côte du. Oursin rouge Pêche commerciale Colombie-Britannique Pacifique, Côte du Gestion. Oursins Populations Colombie-Britannique Pacifique, Côte du. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian manuscript report of fisheries and aquatic sciences ; 2516. (CaOODSP)9.505211 PDF 1.05 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs97-4/Fs97-4-2516-eng.pdf