von-Mises distributed reproduction rate independent of abundance

This function calculates the mass-specific reproduction rate of a species at a given time. The reproduction rate is given by $$r(t) = r_0 \frac{\exp(\kappa \cos(2\pi(t - \mu)))}{2\pi I_0(\kappa)}$$ where \(r_0\) is the amplitude of the reproduction rate, \(\kappa\) is the concentration parameter of the von-Mises distribution, and \(\mu\) is the mean of the von-Mises distribution. These parameters must be supplied in the slots rdd_vonMises_r0, rdd_vonMises_kappa and rdd_vonMises_mu of the species_params data frame of the params object.

Usage

seasonalVonMisesRDD(params, t, ...)

Arguments

params

A MizerParams object

t

The time at which to calculate RDD

...

Unused

Value

A vector of species-specific reproduction rates

Details

Note that this reproduction rate is independent of the rate at which the species release gonadic mass for reproduction and is thus only to be used as an aid during the process of setting up the model. It should be replaced by another reproduction rate function before simulating the dynamics of the model.

See also

Other functions calculating density-dependent reproduction rates: seasonalBevertonHoltRDD()