GB_slope:
Geromont and Butterworth index slope Harvest Control Rule
Description
An MP similar to SBT1 that modifies a time-series of catch recommendations and aims for a stable catch rates.
Usage
GB_slope(x, DLM_data, reps = 100, yrsmth = 5, lambda = 1)
Arguments
x
A position in data-limited methods data object
DLM_data
A data-limited methods data object
reps
The number of TAC samples
yrsmth
Number of years for evaluating slope in relative abundance index
Details
Note that this is my interpretation of their approach and is now stochastic. Currently it is generalized and is not 'tuned' to more detailed assessment data which might explain why in some cases it leads to stock declines.
References
Geromont, H.F. and Butterworth, D.S. 2014. Complex assessment or simple management procedures for efficient fisheries management: a comparative study. ICES J. Mar. Sci. doi:10.1093/icesjms/fsu017