DDes:
Effort searching version of DD - Delay - Difference Stock Assessment with UMSY and MSY leading that fishes at 75 per cent of FMSY
Description
A simple delay-difference assessment that estimates FMSY using a time-series of catches and a relative abundance index. The MP provides a change in effort in the direction of FMSY up to a maximum change of 10 percent.
Usage
DDes(x, DLM_data, reps = 100, LB=0.9, UB=1.1)
Arguments
x
A position in a data-limited methods data object
DLM_data
A data-limited methods data object
reps
The number of stochastic samples of the TAC recommendation
LB
The lowest permitted factor of previous fishing effort
UB
The highest permitted factor of previous fishing effort
References
Method based on equations of Carl Walters (bug him with questions and expect colourful responses)