pellaTparams: Calculate Pella-Thompson Production Model Parameters

In laurieKell/FLCandy: Candidate methods for FLR

Calculate Pella-Thompson Production Model Parameters

Description

Methods to calculate parameters (r, K, p) for the Pella-Thompson production model from reference points (FMSY, BMSY, B0). Multiple methods are provided for different input object classes.

Usage

pellatParams(object, biomass, ...)

## S4 method for signature 'FLBRP,ANY'
pellatParams(object)

## S4 method for signature 'numeric,ANY'
pellatParams(object)

## S4 method for signature 'missing,missing'
pellatParams(
  object,
  biomass,
  fmsy,
  bmsy,
  k = NULL,
  b0 = NULL,
  virgin = NULL,
  ...
)

Arguments

object	Input object of class 'FLPar', 'FLBRP', or 'numeric'
interval	Numeric vector of length 2 specifying the interval for shape parameter optimization. Default c(1.1, 10)

Details

The methods estimate Pella-Thompson model parameters using different input types:

• FLPar: Requires fmsy, bmsy, and k parameters

• FLBRP: Extracts reference points from FLBRP object

• numeric: Requires named vector with fmsy, bmsy, and b0

Value

An FLPar object containing:

• r - Intrinsic rate of population growth

• k - Carrying capacity

• p - Shape parameter

References

Pella, J.J. and Tomlinson, P.K. (1969) A generalized stock production model. Inter-American Tropical Tuna Commission Bulletin 13: 419-496

See Also

FLPar, FLBRP

Examples

# Using numeric vector
refs <- c(fmsy=0.2, bmsy=1000, b0=2000)
pellatParams(refs)

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