M_Charnov: Compute age-varying natural mortality (M) based on Charnov et...

In nikolaifish/bamExtras: Functions and Data in Support of Stock Assessments with the Beaufort Assessment Model (BAM)

Compute age-varying natural mortality (M) based on Charnov et al (2013) and scale based on constant M

Description

Compute age-varying natural mortality (M) based on Charnov et al (2013) and scale based on constant M

Usage

M_Charnov(a, Linf, K, t0, aP = 0, M_constant = NULL, aMin = 0, par_b = -1.5)

Arguments

a	ages at which to compute M
Linf	length infinity
K	growth coefficient
t0	age (time) at length zero
aP	proportion of age (value between 0 and 1) at which to compute length (e.g. aP=0.5 to compute length at midyear)
M_constant	constant M value used to scale age-varying M. Defaults to NULL. M will be scaled if a numeric value of M_constant is supplied.
aMin	minimum age to include in computation of scaling factor when scaling M
par_b	b parameter for Charnov equation ((L/Linf)^par_b)*K. Defaults to value from manuscript par_b=-1.5.

Author(s)

Nikolai Klibansky

References

Charnov, E. L., H. Gislason, and J. G. Pope. 2013. Evolutionary assembly rules for fish life histories. Fish and Fisheries 14:213-224.

Examples

## Not run: 
# M for Black Sea Bass
M_Charnov(a=0:11,Linf = 502, K = 0.173, t0 = -0.97, M_constant=0.38, aMin=2)

## End(Not run)

nikolaifish/bamExtras documentation built on July 21, 2023, 8:26 a.m.