Initial values for fish spectra

Values used as starting values for simulations with project().

Usage

initialN(params) <- value

initialN(object)

Arguments

params

A MizerParams object

value

A matrix with dimensions species x size holding the initial number densities for the fish spectra.

object

An object of class MizerParams or MizerSim

Value

A matrix with dimensions species x size holding the initial number densities for the fish spectra.

See also

initialNResource(), initialNOther()

Examples

# Doubling abundance of Cod in the initial state of the North Sea model
params <- NS_params
initialN(params)["Cod", ] <- 2 * initialN(params)["Cod", ]
# Calculating the corresponding initial biomass
biomass <- initialN(params)["Cod", ] * dw(NS_params) * w(NS_params)
# Of course this initial state will no longer be a steady state
params <- steady(params)
#> Convergence was achieved in 16.5 years.
#> Warning: The following species require an unrealistic reproductive efficiency greater than 1: Sandeel, Plaice, Cod