Species and Stocks - CRiSP.1.5 User Manual

II.3.2 - Species and Stocks

The species and stocks ¹ of fish entering the river system are arbitrarily defined. Species are identified as yearling (spring) and subyearling (fall on the Snake River and summer along the mid-Columbia River) chinook salmon and steelhead. The number of fish released at each site is identified on a daily basis. Each release group has a unique set of passage parameters and corresponding model results are tabulated separately.

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¹ Wild and hatchery migrants do not necessarily need to be defined as separate stocks if separate tracking is not desired, but definition as separate stocks is required if the user assigns them different parameter values (e.g. differential vulnerability to predation, swimming behavior, etc.). If the user wants to keep track of different stocks as different releases with the same parameters, CRiSP.1 tracks each release separately in both Monte Carlo Mode and Scenario Mode.

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