# DTe40: Effort searching MP aiming for a fixed stock depletion In DLMtool: Data-Limited Methods Toolkit

## Description

Effort is adjusted using a simple rule that aims for a specified level of depletion.

## Usage

 1 2 3 DTe40(x, Data, reps = 100, plot = FALSE, alpha = 0.4, LB = 0.9, UB = 1.1) DTe50(x, Data, reps = 100, plot = FALSE, alpha = 0.5, LB = 0.9, UB = 1.1) 

## 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? alpha The target level of depletion LB The lowest permitted factor of previous fishing effort UB The highest permitted factor of previous fishing effort

## Details

The TAE is calculated as:

\textrm{TAE}_y = \frac{D}{α} \textrm{TAE}_{y-1}

where D is estimated current level of depletion and α is argument alpha specifying the target level of depletion.

The maximum fractional change in TAE is specified with arguments LB and UB

## Value

An object of class Rec with the TAE slot(s) populated

## Functions

• DTe40: Effort is adjusted to reach 40 percent stock depletion

• DTe50: Effort is adjusted to reach 50 percent stock depletion

## Required Data

See Data for information on the Data object

DTe40: Dep, MPeff

## Rendered Equations

See Online Documentation for correctly rendered equations

T. Carruthers

## Examples

 1 DTe40(1, DLMtool::Atlantic_mackerel, plot=TRUE) 

DLMtool documentation built on March 13, 2020, 2:52 a.m.