calc_Nt: Calculate Numbers at age at time t, for species tracked by...

In jcpayne/mice-models: Model of Intermediate Complexity for Ecosystem Assessment

Description

Calculates numbers at age at time t, Nmat[,t], from Nmat[,t-1] and sets it in the Species object. Reproduction happens in timestep 1 each year, and during other timesteps, only mortality is applied. The function sets the following values in the Species object: Nmat[,t]; the previous timestep's total mortality rate (Zmat[,t-1], log scale); the current fishing mortality rate (Fv[t], log scale) and catch; fished species only); and the current age 1+ biomass, B1P[t] (prey species only).

Usage

calc_Nt(Species, y, ts, t, L)

Arguments

Species	A Species object.
y	Simulation year
ts	Global timestep (ts = t * y)
t	Within-year timestep
L	Number of within-year timesteps per year.

Value

A modified Species object (see Description)

See Also

Other Basic_dynamics: calc_Ny

jcpayne/mice-models documentation built on May 18, 2019, 10:25 p.m.