pt: Production Type Method for Surplus Production Models

In laurieKell/FLCandy: Candidate methods for FLR

Production Type Method for Surplus Production Models

Description

Estimates parameters of surplus production models using the PT method by deriving parameters from reference points and biomass ratios

Usage

pt(object, ...)

Arguments

object	Input object (FLPar, numeric, or FLBRP)
...	Additional arguments passed to methods
shape	Ratio of BMSY to virgin biomass (default: object"bmsy"/object"v")
what	Function to calculate biomass metric (default: ssb)

Details

Production Type (PT) Method

Value

An FLPar object containing:

• r: intrinsic growth rate

• k: carrying capacity

• p: shape parameter

• msy: maximum sustainable yield

• bmsy: biomass at MSY

• fmsy: fishing mortality at MSY

• virgin: unfished biomass

Examples

## Not run: 
params <- FLPar(c(bmsy=500, msy=125, v=1000))
pt(params)

## End(Not run)

laurieKell/FLCandy documentation built on April 17, 2025, 5:23 p.m.