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

Description

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

Usage

1
Islope4(x, DLM_data, reps = 100, yrsmth = 5, lambda=0.2,xx=0.4)

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

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

Details

Tested by Carruthers et al. 2015.

Value

A numeric vector of quota recommendations

Author(s)

T. Carruthers

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

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