00000nam 2200000za 4500 9.805519 CaOODSP 20221107135653 cr ||||||||||| 150406s1999 oncdb ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-1/1999-148E-PDF Showell, Mark A. (Mark Alexander) Assessment of the Scotian Shelf silver hake population in 1998 [electronic resource] / M.A. Showell & L.P. Fanning. Ottawa : Fisheries and Oceans Canada, 1999. 41 p. : fig., graphs, maps, tables. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/148 Includes bibliographical references (p. 10-11). The status of the Scotian Shelf silver hake population in 4VWX was evaluated using updated catch-at-age (1978-98) surveys, commercial CPUE, and biological indices. An analytical assessment of yield was not possible, as the model results could not be accepted due to a large retrospective pattern in the estimates of population numbers. Other attributes of stock status were not consistent. Recruitment will likely be above average in 2000, and resource concentration and geographical range distribution exhibit positive trends. However, survey biomass is very low and mortality estimates from the survey are very high. The extreme values of these important indicators are cause for concern. Other attributes, such as length-at-age, condition, and size at maturity, while not at near lowest levels, are below long term averages. Under these circumstances, catches should be restricted to that seen from 1997-99. gccst Fisheries resources gccst Salt water fish gccst Fishing area gccst Fisheries management Fanning, L. P. Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 99/148 (CaOODSP)9.507740 PDF 1.50 MB https://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-1999-148-eng.pdf