age2length: Convert fish age to length

Description Usage Arguments Examples

Description

Converts fish age to length using Von Bertalanffy growth model parameters (Knickle and Rose 2013) Lt = Linf * 1-exp(-k*(t-t0)), where Lt is length (cm) at age t (year), Linf is the asymptotic length (cm), k is the VB growth coefficient (1/year), and t0 is the x intercept (year). Linf = 112.03 (95

Usage

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age2length(t = 0:50, Linf_mean = 112.03, Linf_SD = 10.46/1.96,
  k_mean = 0.13, k_SD = 0.021/196, t0 = 0.18)

Arguments

t

The age of the fish (year)

Linf_mean

Von Bertalanffy growth model parameter - mean asymptotic length (cm)

Linf_SD

Von Bertalanffy growth model parameter - standard deviation asymptotic length (cm)

k_mean

Von Bertalanffy growth model parameters - mean growth coefficient (1/year)

k_SD

Von Bertalanffy growth model parameters - standard deviation growth coefficient (1/year)

t0

Von Bertalanffy growth model parameters - x intercept (year)

Examples

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# one t at a time
age2length(t = 1, Linf_mean = 112.03, Linf_SD = 10.46/1.96,k_mean = 0.13, k_SD = 0.021/196, t0 = 0.18)

# multiple t at a time
age2length(t = 0:50, Linf_mean = 112.03, Linf_SD = 10.46/1.96,k_mean = 0.13, k_SD = 0.021/196, t0 = 0.18)

remi-daigle/BESTMPA documentation built on May 27, 2019, 4:55 a.m.