setMaxIntakeRate: Set maximum intake rate

In mizer: Dynamic Multi-Species Size Spectrum Modelling

Set maximum intake rate

Description

Set maximum intake rate

Usage

setMaxIntakeRate(params, intake_max = NULL, reset = FALSE, ...)

getMaxIntakeRate(params)

intake_max(params)

intake_max(params) <- value

Arguments

params	MizerParams
intake_max	Optional. An array (species x size) holding the maximum intake rate for each species at size. If not supplied, a default is set as described in the section "Setting maximum intake rate".
reset	If set to TRUE, then the intake rate will be reset to the value calculated from the species parameters, even if it was previously overwritten with a custom value. If set to FALSE (default) then a recalculation from the species parameters will take place only if no custom value has been set.
...	Unused
value	intake_max

Value

setReproduction(): A MizerParams object with updated maximum intake rate.

getMaxIntakeRate() or equivalently intake_max(): An array (species x size) with the maximum intake rate.

Setting maximum intake rate

The maximum intake rate h_i(w) of an individual of species i and weight w determines the feeding level, calculated with getFeedingLevel(). It is measured in grams/year.

If the intake_max argument is not supplied, then the maximum intake rate is set to

h_i(w) = h_i w^{n_i}.

The values of h_i (the maximum intake rate of an individual of size 1 gram) and n_i (the allometric exponent for the intake rate) are taken from the h and n columns in the species parameter dataframe. If the h column is not supplied in the species parameter dataframe, it is calculated by the get_h_default() function.

If h_i is set to Inf, fish of species i will consume all encountered food.

See Also

Other functions for setting parameters: gear_params(), setExtEncounter(), setExtMort(), setFishing(), setInitialValues(), setInteraction(), setMetabolicRate(), setParams(), setPredKernel(), setReproduction(), setSearchVolume(), species_params()

mizer documentation built on Oct. 17, 2024, 9:07 a.m.