CC1 {DLMtool} R Documentation

## Geromont and Butterworth (2015) Constant Catch

### Description

The TAC is the average historical catch over the last `yrsmth` (default 5) years, multiplied by (1-`xx`)

### Usage

```CC1(x, Data, reps = 100, plot = FALSE, yrsmth = 5, xx = 0)

CC2(x, Data, reps = 100, plot = FALSE, yrsmth = 5, xx = 0.1)

CC3(x, Data, reps = 100, plot = FALSE, yrsmth = 5, xx = 0.2)

CC4(x, Data, reps = 100, plot = FALSE, yrsmth = 5, xx = 0.3)

CC5(x, Data, reps = 100, plot = FALSE, yrsmth = 5, xx = 0.4)

CurC(x, Data, reps = 100, plot = FALSE, yrsmth = 1, xx = 0)
```

### 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? `yrsmth` Years over which to calculate mean catches `xx` Parameter controlling the TAC. Mean catches are multiplied by (1-`xx`)

### Details

The TAC is calculated as:

\textrm{TAC} = (1-x)C_{\textrm{ave}}

where x lies between 0 and 1, and C_{\textrm{ave}} is average historical catch over the previous `yrsmth` years.

The TAC is constant for all future projections.

### Value

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

### Functions

• `CC1`: TAC is average historical catch from recent `yrsmth` years

• `CC2`: TAC is average historical catch from recent `yrsmth` years reduced by 10\

• `CC3`: TAC is average historical catch from recent `yrsmth` years reduced by 20\

• `CC4`: TAC is average historical catch from recent `yrsmth` years reduced by 30\

• `CC5`: TAC is average historical catch from recent `yrsmth` years reduced by 40\

• `CurC`: TAC is fixed at last historical catch

### Required Data

See `Data-class` for information on the `Data` object

`CC1`: Cat, LHYear, Year

### Rendered Equations

See Online Documentation for correctly rendered equations

T. Carruthers

### References

Geromont, H. F., and D. S. Butterworth. 2015. Generic Management Procedures for Data-Poor Fisheries: Forecasting with Few Data. ICES Journal of Marine Science: Journal Du Conseil 72 (1). 251-61.

Other Constant Catch MPs: `GB_CC()`

### Examples

```CC1(1, MSEtool::Cobia, plot=TRUE)

CC2(1, MSEtool::Cobia, plot=TRUE)

CC3(1, MSEtool::Cobia, plot=TRUE)

CC4(1, MSEtool::Cobia, plot=TRUE)

CC5(1, MSEtool::Cobia, plot=TRUE)

CurC(1, MSEtool::Cobia, plot=TRUE)

```

[Package DLMtool version 6.0.2 Index]