CC1: Geromont and Butterworth (2015) Constant Catch

In DLMtool: Data-Limited Methods Toolkit

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

Author(s)

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.

See Also

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)

DLMtool documentation built on June 20, 2022, 5:14 p.m.