The carrying capacity of Chilcotin River summer run steelhead fry in the Chilko River was assessed by the Fish Habitat Improvement Section from October 4 to 8, 1981. Investigation was directed at steelhead fry density and population estimation. Data was also collected on juvenile chinook and coho salmon. The steelhead fry population was estimated at 650,000. Population densities were considered at or very near saturation levels. Predicted smolt yield and adult return data suggest the major limiting factor in adult escapement was commercial interception of steelhead. Enhancement of Chilcotin River steelhead through fry stocking was considered inappropriate in the Chilko River. The recommendation that fry stocking program emphasis be shifted to other locations within the Chilcotin River system was made.
Tredger, C.D.. 1982. Assessment of Steelhead Fry Carrying Capacity in the Chilko River with Reference to Chilcotin River Steelhead Enhancement Opportunities. Ministry of Environment
Topic: Fish and Fish Habitats
Keywords: steelhead, chinook salmon, coho salmon, Chilcotin River, Chilko River, population, estimates, density, carrying capacity, fry, stocking, management
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