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Status of the wild salmon stocks

Status of the wild salmon stocks. Will the individual wild salmon stocks reach 50% of the smolt production capacity by 2010?. Interpretation of stock-recruit information. Stock with high productivity:. Stock with low productivity:. Tolerate high harvest rates, large surplus for fishery.

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Status of the wild salmon stocks

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  1. Status of the wild salmon stocks Will the individual wild salmon stocks reach 50% of the smolt production capacity by 2010?

  2. Interpretation of stock-recruit information Stock with high productivity: Stock with low productivity: Tolerate high harvest rates, large surplus for fishery Tolerate low harvest rates, small surplus for fishery

  3. Reference points based on MSY • MSY= Maximum sustainable yield • FMSY= Harvest rate which produces MSY • MSY and FMSY are stock-specific values  special implications for system with mixed-stock fishing

  4. Potential production Spawners (next generation) Production in SMSY 50% of potential production SMSY Spawners

  5. One possible solution to attain MSY: • FMSY for the offshore (all stocks mixed) fishery determined by the least productive river (Southern rivers) • FMSY for the Gulf of Bothnian coastal fishery (GoB stocks mixed) determined by least productive river in the Gulf • FMSY for the river fishery (no mixing between stocks) determined by FMSY for the stock within that river Would the objectives be stated in terms of set LIMITS (i.e., lines not to be crossed) or TARGETS (i.e., preferred situation)?? What RISK level one is ready to accept?

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