AvC {DLMtool} R Documentation

## Average Catch

### Description

A simple average catch MP that is included to demonstrate a 'status quo' management option

### Usage

AvC(x, Data, reps = 100, plot = FALSE)


### 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?

### 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{∑_{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

### Value

An object of class Rec-class with the TAC slot populated with a numeric vector of length reps

### Required Data

See Data-class for information on the Data object

AvC: Cat, LHYear, Year

### Rendered Equations

See Online Documentation for correctly rendered equations

### Author(s)

T. Carruthers

Other Average Catch MPs: AvC_MLL(), DCACs()
Rec <- AvC(1, MSEtool::Cobia, reps=1000, plot=TRUE) # 1,000 log-normal samples with CV = 0.2