Rationale and Follow-up on Terminating Nutrient Treatment of Morice Lake

Returns of sockeye salmon to the Morice-Nanika production system (tributary to the Skeena River) routinely exceeded 60,000 pieces prior to 1950. Between 1950 and 1955 escapements declined precipitously to only a few thousand adults and this condition has persisted to the present time (Figure 1). Shepard as well as other DFO management personnel suggested a plausible mechanism through which a sudden decline in adult sockeye returns might trigger changes in within-lake growth and survival of juvenile sockeye such that further stick declines would occur.

Data and Resources

Additional Info

Field Value
Source URL
Author Hyatt, K. D.
Data Steward Fisheries and Oceans Canada Pacific Region
Publication Year 1983