Changes in catchability of cod, haddock and whiting associated with the Scottish seine-net fleet

Cook, Robin and Armstrong, D. W. (1985) Changes in catchability of cod, haddock and whiting associated with the Scottish seine-net fleet. Journal du Conseil - Conseil International pour l'Exploration de la Mer, 42 (2). pp. 171-178. ISSN 0020-6466

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Abstract

The catchability coefficient, Q, of cod, haddock, and whiting associated with the Scottish seine-net fleet is examined. Cod and haddock show increasing catchability for the period 1963–1979. The rise in Q is related to the spatial distribution of the fleet as vessels increasingly fish in areas of higher fish abundance. Additionally, for haddock, catchability is related to year-class strength. The utility of catchability trends in the prediction of fishing mortality is discussed.