Trends in the witch fishery on St. Pierre Bank / by W.R. Bowering.: Fs70-8/78-6E-PDF

"Landings from this fishery have fluctuated from 500 tons in 1965 to almost 5,000 tons in1967. The landings from 1967 were on a steady decline (with the exception of 1973) until 1977 when the catch increased to 4,200 tons. This fishery, as with most witch fisheries in the Northwest Atlantic, is primarily a by-catch of other main fisheries such as redfish, American plaice and cod. Because of this and the fact that this species has a varied distribution pattern seasonally, any effort and catch per unit effort data have little real value in determining estimates of fishing mortality for this stock. Since the data are still insufficient to perform a virtual population type of analysis, this document is essentially a review of a previous yield-per-recruit assessment presented at last year's meeting with the addition of 1977 data"--Introduction.

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