The most biologically precautionary of two index/CPUE target MPs proposed by Geromont and Butterworth 2014. Tested by Carruthers et al. 2015
Itarget4(x, Data, reps = 100, yrsmth = 5, xx=0.3, Imulti=2.5)A position in data-limited methods data object
A data-limited methods data object
The number of TAC samples
Years over which to smooth recent estimates of surplus production
Parameter controlling the fraction of mean catch to start using in first year
Parameter controlling how much larger target CPUE / index is compared with recent levels.
A numeric vector of TAC recommendations
Tested by Carruthers et al. 2015.
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