{"name":"Fpa","title":"Fpa from Flim","pagetitle":"Fpa from Flim — Fpa","aliases":"Fpa","author":"\nArni Magnusson.\n","keywords":[],"description":"

Calculate the value of Fpa from Flim and sigmaF.

","usage":"Fpa(Flim, sigmaF)","arguments":[{"name":"Flim","description":"

the value of the Flim reference point.

"},{"name":"sigmaF","description":"

the estimation uncertainty in F (standard error of logF in the\nterminal year).

"}],"has_args":true,"examples":"# NOT RUN {\nFpa(0.90, 0.15)\n\n# }\n","sections":[],"value":"

Value of Fpa.

","note":["

The purpose of PA reference points is to apply a precautionary approach in\nfisheries management.

By comparing the current F to Fpa, one can answer the question: are we at\nleast 95% sure that F is below Flim, given the estimation uncertainty?

The ICES (2017) technical guidelines define Fpa as:","$$F_\\mathrm{pa} = F_\\mathrm{lim} \\exp(-1.645\\sigma_F)$$

The Fpa function can also be used to calculate reference points based\non harvest rate: Hpa from Hlim and sigmaH.

"],"references":"

ICES (2017) ICES fisheries management reference points for category 1 and 2\nstocks. 10.17895/ices.pub.3036ICES Advice\nTechnical Guidelines 12.4.3.1.

","seealso":["

Bpa calculates that reference point from Blim and sigmaB.","sigmaPA calculates the implicit sigma from PA reference points.","icesAdvice-package gives an overview of the package.

"],"package":{"package":"icesAdvice","version":"2.1.1"}}

Description

Usage

Arguments

Value

References

See Also

Examples