L95target:
A management procedure that adjusts the TAC up/down from reference (target) level (that is a fraction of mean recent premanagement catches) to reach a target mean length of fish caught.
Description
This MP is based on Ltarget1 proposed by Geromont and Butterworth 2014, but here the target and limit mean lengths are based on the length at maturity distribution rather than an arbitrary multiplicative of the mean length.
Usage
L95target(x, DLM_data, reps = 100, yrsmth = 5, buffer=0)
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
Years over which to calculate the mean historical catch
buffer
Parameter controlling the fraction of mean catch to set the reference (or target) TAC level - acts as a precautionary buffer
Value
A numeric vector of TAC recommendations
References
Geromont, H.F., Butterworth, D.S. 2014. Generic management procedures for data-poor fisheries; forecasting with few data. ICES J. Mar. Sci. doi:10.1093/icesjms/fst232