SPmod:
Surplus production based catch-limit modifier
Description
An MP that makes incremental adjustments to TAC recommendations based on the apparent trend in surplus production. Based on the theory of Mark Maunder (IATTC)
Usage
SPmod(x, DLM_data, reps = 100, alp = c(0.8, 1.2), bet = c(0.8, 1.2))
Arguments
x
A position in data-limited methods data object
DLM_data
A data-limited methods data object
reps
The number of quota samples
alp
Condition for modifying the TAC (bounds on change in abundance)
bet
Limits for how much the TAC can change among years
Value
A numeric vector of TAC recommendations
Details
Note that this isn't exactly what Mark has previously suggested and is stochastic in this implementation.
References
http://www.iattc.org/Meetings/Meetings2014/MAYSAC/PDFs/SAC-05-10b-Management-Strategy-Evaluation.pdf