This returns a new model in which the reproduction rate varies throughout the year. See details below.
Usage
setSeasonalReproduction(
params,
release_func = "seasonalVonMisesRelease",
RDD = "seasonalBevertonHoltRDD",
include_gonads = TRUE
)Arguments
- params
A MizerParams object
- release_func
Name of the function giving the time-dependent mass-specific release rate. This function should take a time and a MizerParams object as arguments and return a vector with the reproduction rates for all species.
- RDD
Name of the function for calculating the density-dependent reproduction rate RDD.
- include_gonads
Boolean. If TRUE (default) then the gonadic mass is included in the prey encounter rate.
Details
This function does not change the rate at which fish invest energy into reproduction. It however changes what happens with this investment. Rather than being released immediately to produce offspring, it is used to accumulate gonadic mass. You specify a function that gives the time-dependent mass-specific rate \(r(t)\) at which this gonadic mass is then released for reproduction.
The package provides several candidate functions for calculating release
rates:
seasonalVonMisesRelease(), seasonalBetaHazardRelease(),
seasonalBetaRelease() and seasonalGaussianRelease(), and you can use
these as templates for writing your own release functions.
You also specify a non-linear function that calculates the density-dependent reproduction rate \(R_{dd}\) from the density-independent rate \(R_{di}\) of egg production.