Science Advisory Report 2009/073
Marine Survival Forecast of Southern British Columbia coho
Summary
- 2008 marine survival and abundance observations were higher than the 2007 observations on the West Coast of Vancouver Island. In other areas covered by this forecast the 2008 marine survival and abundance observations were, except for Big Qualicum Hatchery (GBW), lower than the 2007 observations.
- Marine survivals have decreased from the 10% to 20% range in the early 1970s to less than 2%.
- Forecast models predict extremely low marine survivals and abundances for 2009, similar to the last four years. Interior Fraser, Georgia Basin East and Georgia Basin West Management Units in particular are stocks of concern.
- The distributional forecast is for a stronger inside distribution than the long term average.
- Maintaining or strengthening programs for monitoring coded-wire tagged, adipose fin clipped coho in catches, particularly the recreational catch, are important for forecasting marine survival of southern British Columbia coho populations.
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