Stock assessments for British Columbia herring in 1987 and forecasts of the potential catch in 1988 / by V. Haist, J.F. Schweigert and D. Fournier. : Fs97-4/1990E-PDF

"Herring stock abundance in British Columbia waters was assessed for 1987, and forecasts were made for 1988 using two analytical methods: (1) escapement model, and (2) age-structured model. Diving spawn survey data was utilized in the escapement model wherever available. Forecasts of pre-fishery biomass are obtained by weighting the estimates from the two models. The forecasts, are for 79,680 tonnes to the northern and 86,210 tonnes to the southern stock assessment regions. These estimates represent a slight decrease from 1987 levels, reflecting below average recruitments to all the southern areas during the last spawning run. The recommended 1988 catch (20% of the 1988 forecast herring run for stocks above CUTOFF levels) for the entire B.C. coast is 30,750 tonnes. All areas except the Queen Charlotte Islands should be available to the fishery in 1988"--Abstract, page iv.

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