cohortSim: Simulation of a cohort

In marchtaylor/fishdynr: Fisheries science related population dynamics models

Description

cohortSim simulates a single cohort

Usage

cohortSim(params, t_incr = 1)

Arguments

params	List of parameters to use in function
t_incr	Value to use a time increment (in years). Defaults to 1.

Details

params list should contain the following parameters:

• species Species name

• growthFun Name of growth function (e.g. "growth_VB" is the von Bertalanffy growth function)

• amax Maximum age

• LWa Length-weight relationship parameter a (weight~a*length^b)

• LWb Length-weight relationship parameter b (weight~a*length^b)

• M Natural mortality

• F Fishing mortality

• N0 Number of individuals at time 0

• matFun Name of maturity function (e.g. "pmat_w" is a logistic function that includes width, w, of quantiles)

• selectFun Function to use for gear selection. Determines lengths vulnerable to fishing mortality (e.g. "gillnet" and "knife_edge" functions).

• ... Other parameters for growth, maturity, and selectivity functions.

Value

A list

Examples

data(tilapia)
res <- cohortSim(tilapia, t_incr=.1)
plot(pcap ~ Lt, res, t="l")
plot(Lt ~ t, res, t="l")
plot(Wt ~ t, res, t="l")

plot(Bt ~ t, res, t="l")
lines(SBt ~ t, res, col=2)

plot(Bt ~ Lt, res, t="l")
lines(SBt ~ Lt, res, col=2)

plot(Yt ~ t, res, t="l")

plot(Nt ~ t, res, t="l", log="y")
lines(Nt.noF ~ t, res, col=2, lty=2)

marchtaylor/fishdynr documentation built on May 21, 2019, 11:27 a.m.