Itarget1:
A management procedure that incrementally adjusts the TAC (starting from reference level that is a fraction of mean recent catches) to reach a target CPUE / relative abundance index.
Description
The least biologically precautionary of two index/CPUE target MPs proposed by Geromont and Butterworth 2014. Tested by Carruthers et al. 2015
Usage
Itarget1(x, DLM_data, reps = 100, yrsmth = 5, xx=0, Imulti=1.5)
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
Imulti
Parameter controlling how much larger target CPUE / index is compared with recent levels.
Value
A numeric vector of TAC recommendations
Details
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