Harvest control rule to fish at some fraction of maximum sustainable yield
Source:R/HCRs.R
HCR_MSY.RdA simple control rule that specifies the total allowable catch (TAC) as a function of the abundance of the first projection year and some fraction of FMSY/UMSY.
Arguments
- Assessment
An object of class Assessment with estimates of FMSY or UMSY and vulnerable biomass in terminal year.
- reps
The number of stochastic samples of the TAC recommendation.
- MSY_frac
The fraction of FMSY or UMSY for calculating the TAC (e.g. MSY_frac = 0.75 fishes at 75% of FMSY).
- ...
Miscellaneous arguments.
Value
An object of class MSEtool::Rec with the TAC recommendation.
Details
The catch advice is calculated using the catch equation of the corresponding
assessment. See Assessment@forecast$catch_eq, a function that returns the catch advice for a specified Ftarget.
References
Punt, A. E, Dorn, M. W., and Haltuch, M. A. 2008. Evaluation of threshold management strategies for groundfish off the U.S. West Coast. Fisheries Research 94:251-266.
Examples
# create an MP to run in closed-loop MSE (fishes at UMSY)
SPMSY <- make_MP(SP, HCR_MSY)
# The MP which fishes at 75% of FMSY
SP75MSY <- make_MP(SP, HCR_MSY, MSY_frac = 0.75)
# \donttest{
myOM <- MSEtool::runMSE(MSEtool::testOM, MPs = c("FMSYref", "SPMSY", "SP75MSY"))
#> ℹ Checking OM for completeness
#> ✔ Loading operating model
#> ✔ Optimizing for user-specified movement
#> ✔ Calculating MSY reference points for each year
#> ✔ Optimizing for user-specified depletion in last historical year
#> ✔ Calculating historical stock and fishing dynamics
#> ✔ Calculating per-recruit reference points
#> ✔ Calculating B-low reference points
#> ✔ Calculating reference yield - best fixed F strategy
#> ✔ Simulating observed data
#> ✔ Running forward projections
#> ✔ 1 / 3 Running MSE for FMSYref
#>
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#>
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#>
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#>
#> ✔ 3 / 3 Running MSE for SP75MSY
#>
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#>
# }