fb4package (version 2.0.0)

calculate_excretion: Calculate daily excretion (Mid-level - Main function)

Description

Main excretion calculation function called from simulation loop

Usage

calculate_excretion(
  consumption,
  egestion,
  temperature,
  p_value,
  processed_excretion_params
)

Value

A non-negative numeric scalar giving the daily excretion rate in J per g fish per day. Returns 0 when consumption is zero. The equation used depends on processed_excretion_params$EXEQ

(1 = constant fraction of assimilated energy; 2-3 = temperature- and ration-dependent; 4 = temperature-dependent only).

Arguments

consumption

Consumption (J/g)

egestion

Egestion (J/g)

temperature

Water temperature (deg C)

p_value

Proportion of maximum consumption (p_value)

processed_excretion_params

List with processed excretion parameters

Examples

# EXEQ 1: constant fraction of assimilated energy
params <- list(EXEQ = 1, UA = 0.1)
calculate_excretion(consumption = 5.0, egestion = 0.8, temperature = 15,
                    p_value = 0.5, processed_excretion_params = params)