DLMtool (version 5.0.2)

Islope1: A management procedure that incrementally adjusts the TAC to maintain a constant CPUE or relative abundance index

Description

The least biologically precautionary of two constant index / CPUE methods proposed by Geromont and Butterworth 2014. Tested by Carruthers et al. 2015

Usage

Islope1(x, Data, reps = 100, yrsmth = 5, lambda=0.4,xx=0.2)

Arguments

x

A position in data-limited methods data object

Data

A data-limited methods data object

reps

The number of TAC samples

yrsmth

Years over which to smooth recent estimates of surplus production

lambda

A gain parameter controlling the speed in update in TAC.

xx

Parameter controlling the fraction of mean catch to start using in first year

Value

A numeric vector of quota recommendations

Details

Tested by Carruthers et al. 2015.

References

Carruthers et al. 2015. Performance review 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