growth-models: Growth models

In laurieKell/FLCandy: Candidate methods for FLR

Growth models

Description

Functions to model fish growth.

Von Bertalanffy growth model.

Inverse Von Bertalanffy growth model.

Gompertz growth model.

Richards growth model.

Usage

vonbert(linf, k, t0, age)

ivonbert(linf, k, t0, len)

gompertz(linf, a, k, age)

richards(linf, k, b, m, age)

Arguments

linf	Asymptotic length.
k	Growth coefficient.
t0	Theoretical age at length zero.
age	Vector of ages for which to calculate lengths.
len	Vector of lengths for which to calculate ages.
a	Parameter a.
b	Parameter b.
m	Parameter m.

Details

This group of functions provides different growth models commonly used in fisheries science.

Value

A vector of lengths corresponding to the given ages.

A vector of ages corresponding to the given lengths.

A vector of lengths corresponding to the given ages.

A vector of lengths corresponding to the given ages.

Examples

data(ple4)
vonbert(linf = 35, k = 0.352, t0 = -0.26, age = 1:14)
vonbert

vonbert(linf = 35, k = 0.352, t0 = -0.26, age = 1:14)
ivonbert(35, 0.352, -0.26, 1:34)
gompertz(linf = 179.13, k = 0.4088, a = 1.7268, age = 1:12)
richards(linf = 178.63, k = 0.424, b = -7.185, m = 2880.4, age = 1:12)

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