Calculate age at maturity from von Bertalanffy growth parameters

This is not a good way to determine the age at maturity because the von Bertalanffy growth curve is not reliable for larvae and juveniles. However this was used in previous versions of mizer and is supplied for backwards compatibility.

Usage

age_mat_vB(object)

Arguments

object

A MizerParams object or a species_params data frame

Value

A named vector. The names are the species names and the values are the ages at maturity.

Details

Uses the age at maturity that is implied by the von Bertalanffy growth curve specified by the w_inf, k_vb, t0, a and b parameters in the species_params data frame.

If any of k_vb is missing for a species, the function returns NA for that species. Default values of b = 3 and t0 = 0 are used if these are missing. If w_inf is missing, w_max is used instead.