hcr_management_fmort: F-based Harvest Control Rule

In einarhjorleifsson/fpress2: A collection functions for hcr evaluation

Description

The F-based rule is the conventional ICES decision rule. Here it is implemented such that the TAC next year is calculated from the true stock in numbers based on a fishing mortality that includes observation error.

If the Btrigger is set in the rule (Btrigger > 0) then linear reductions of fishing mortality is done relative to observed spawning stock biomass (i.e. that includes observation errrors).

Usage

hcr_management_fmort(y, h, hrate, ssb, ctr)

Arguments

y	XXX
h	XXX
hrate	Harvest rate - with error
ssb	Spawning stock biomass - with error
ctr	Control file

Note

Need to check is ssb-hat is calculated according to the correct delay specification.

To do: Modify function so that buffer is not active below Btrigger and also include a TAC-constraint, either the Icelandic type or the convention percentage contraint used in EU stocks.

einarhjorleifsson/fpress2 documentation built on May 16, 2019, 1:28 a.m.