Average Catch with a size limit
AvC_MLL.Rd
A example mixed control MP that uses the average catch output control MP together with a minimul size limit set at the size of maturity.
Arguments
- x
A position in the data object
- Data
A data object
- reps
The number of stochastic samples of the MP recommendation(s)
- plot
Logical. Show the plot?
Value
An object of class Rec-class
with the TAC, Retention slot(s) populated
Details
The average catch method is very simple. The mean historical catch is calculated and used to set
a constant catch limit (TAC). If reps
> 1 then the reps
samples are drawn from a log-normal
distribution with mean TAC
and standard deviation (in log-space) of 0.2.
For completeness, the TAC is calculated by:
$$\textrm{TAC} =\frac{\sum_{y=1}^{\textrm{n}}{C_y}}{\textrm{n}}$$
where \(\textrm{TAC}\) is the the mean catch recommendation, \(n\) is the number of historical years, and \(C_y\) is the catch in historical year \(y\).
The size of retention is set to the length of maturity.
This MP has been included for demonstration purposes of a mixed control MP.
Rendered Equations
See Online Documentation for correctly rendered equations
Examples
Rec <- AvC_MLL(1, MSEtool::Cobia, reps=1000, plot=TRUE) # 1,000 log-normal samples with CV = 0.2