calculate_respiration: Calculate daily respiration (Mid-level - Main function)

In fb4package: 'Fish Bioenergetics 4.0' Model Implementation with High-Performance 'TMB' Backend

Calculate daily respiration (Mid-level - Main function)

Description

Main respiration calculation function called from simulation loop

Usage

calculate_respiration(temperature, weight, processed_respiration_params)

Arguments

temperature	Water temperature (°C)
weight	Fish weight (g)
processed_respiration_params	List with processed respiration parameters (includes activity params)

Value

A positive numeric scalar giving the daily specific respiration rate in g O_2 per g fish per day. Returns 0.000001 as a minimum safety floor when the result is non-finite or non-positive (e.g. at or above the lethal temperature RTM). The value accounts for both the temperature-dependence function (REQ 1 or 2) and the activity multiplier.

Examples

# REQ 2: Kitchell et al. (1977) temperature dependence
params <- list(REQ = 2, RA = 0.0033, RB = -0.227,
               RTM = 30, RTO = 18, RX = 0.5, ACT = 1.5)
calculate_respiration(temperature = 15, weight = 100,
                      processed_respiration_params = params)

fb4package documentation built on May 8, 2026, 1:07 a.m.