ItargetE4: A management procedure that incrementally adjusts the Effort to reach a
Description
An effort-based version of the most biologically precautionary of two
index/CPUE target MPs proposed by Geromont and Butterworth 2014.Usage
ItargetE4(x, DLM_data, reps = 100, yrsmth = 5, xx = 0, Imulti = 2.5)
Arguments
x
A position in data-limited methods data object
DLM_data
A data-limited methods data object
reps
The number of 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 input controlsDetails
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