calc_phi_simple: Simple spawners per recruit calculation

In multiSA: Multi-Stock Assessment

Simple spawners per recruit calculation

Description

Calculate spawners per recruit by individual stock. Appropriate for a population model with a single spatial area and an annual time steps, i.e. single season.

Usage

calc_phi_simple(Z, fec_a, mat_a, delta = 0)

calc_NPR(Z, na = length(Z), plusgroup = TRUE)

Arguments

Z	Total mortality at age
fec_a	Fecundity at age. Vector
mat_a	Maturity at age. Vector
delta	Fraction of season that elapses when spawning occurs, e.g., midseason spawning when delta = 0.5.
na	Integer, number of age classes
plusgroup	Logical, whether the largest age class is a plusgroup accumulator age

Value

calc_phi_simple() returns a numeric for the spawning biomass per recruit.

calc_NPR() returns a numeric, numbers per recruit at age

See Also

calc_phi_project()

multiSA documentation built on March 21, 2026, 1:06 a.m.