00000nam 2200000za 4500 9.805926 CaOODSP 20221107135754 cr ||||||||||| 150406s2000 oncdb ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-1/2000-078E-PDF Walsh, D. (Dara) Preliminary estimates of harp seal by-catch in the Newfoundland lumpfish fishery [electronic resource] / D. Walsh, B. Sjare, and G.B. Stenson. Ottawa : Fisheries and Oceans Canada, 2000. 16 p. : fig., graphs, maps, tables. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/078 Includes bibliographical references (p. 10-11). This research document presents preliminary estimates of the number of harp seals taken as by-catch in the Newfoundland lumpfish gill net fishery from 1970-1998. Estimates of fishing effort (the amount of roe landed) and the number of seals taken annually were obtained from a By-Catch Logbook Program conducted by fishermen from 1989-1998 in Newfoundland waters. Prior to 1989, annual seal by-catches were estimated using historic roe landings and average by-catch levels based on the Logbook Program. From the start of the commercial fishery in 1968 until 1984 the by-catch of harp seals remained below 10,000 animals. During the next three years it increased dramatically to a high of approximately 30,000 seals in 1987 and then dropped sharply to just below 3,000 by 1990. It then increased again to a high of approximately 36,000 seals in 1994 and then dropped to 17,000 in 1995 where it has remained. These estimates of the number of harp seals taken during the lumpfish gill net fishery provide a long term view of by-catch as a source of mortality for harp seals and also provide the basis for future by-catch work and population modelling initiatives. gccst Fisheries resources gccst Seals gccst Fishing area gccst Fisheries management Sjare, Becky L., 1958- Stenson, Garry B. (Garry Bruce), 1954- Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/078 (CaOODSP)9.507740 PDF 126 KB https://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-2000-078-eng.pdf