Trends in Keogh River smolt production and adult returns were utilized to develop predictive models for forecasting run sizes. A broad variation in smolt (6 fold) and adult (13 fold) numbers has been observed since 1975. Similarly, age structure of smolts and adults and marine survival rates have varied. It was shown that variation in adult return was related to smolt number, age and size. These relationships were used to estimate about average wild return (approx 1000 fish) over the next two seasons. Comments on hatchery returns to the Keogh River are included.
Ward, Bruce R.. 1988. Trends and Forecasts from Winter-Run Steelhead at the Keogh River. Ministry of Environment and Parks. Fisheries Project Report. FPR6
Topic: Fish and Fish Habitats
Keywords: Keogh River, smolt production, return rates, hatchery, models
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