Catchability in Some of the major Groundfish Fisheries off the East Coast of Canada

A. T. Pinhorn

Department of Fisheries and Oceans, Science Branch
Northwest Atlantic Fisheries Centre, P. O. Box 5667
St. John's, Newfoundland, Canada A1C 5X1

Source - Journal of Northwest Atlantic Fishery Science, Volume 8: 15-23
ISSN-0250-6408

 

Pinhorn, A.T. 1989. Catchability in Some of the major Groundfish Fisheries off the East Coast of Canada. J. Northw. Atl. Fish. Sci. 8: 15-23. https://doi.org/10.2960/J.v8.a2

 

Abstract

Catchability coefficients (q) as derived from the relationship between indices of catch per unit of effort (CPUE) and average exploitable biomass were positively correlated with indices of technological changes in the fleets fishing for the major groundfish stocks off the east coast of Canada. There was no evidence of correlation of q with abundance indices from research-vessel survey data. It was therefore concluded that the increase in q observed in the mid-1970s was a result of improved technology by the vessels involved. This was further substantiated by the relative change in the proportion of the total effort expended by the large vessels in the fleet over the period examined and the corresponding larger CPUE of these vessels relative to the remainder of the fleet.

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Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - December 1988
Publication Type - Journal Article

Citation: Pinhorn, A.T. 1989. Catchability in Some of the major Groundfish Fisheries off the East Coast of Canada. J. Northw. Atl. Fish. Sci. 8: 15-23. https://doi.org/10.2960/J.v8.a2