Ltarget4: A management procedure that incrementally adjusts the TAC to reach a target
Description
The most biologically precautionary of four target length MPs proposed by
Geromont and Butterworth 2014. Tested by Carruthers et al. 2015Usage
Ltarget4(x, DLM_data, reps = 100, yrsmth = 5, xx=0.2, xL=1.15)
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 smooth recent estimates of surplus
production
xx
Parameter controlling the fraction of mean catch to start using in
first year
xL
Parameter controlling the magnitude of the target mean length of
catches relative to average length in catches.
Value
A numeric vector of TAC recommendationsDetails
Tested by Carruthers et al. 2015.References
Carruthers et al. 2015. Performance evaluation of simple
management procedures. Fish and Fisheries. In press. 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