respiration_temp_eq2: Temperature function for respiration - Equation 2 (Low-level)

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

Temperature function for respiration - Equation 2 (Low-level)

Description

Implements temperature equation 2 (Kitchell et al. 1977). With user notifications about edge cases and fallback values.

Usage

respiration_temp_eq2(temperature, RTM, RTO, RX, warn = TRUE)

Arguments

temperature	Water temperature (deg C)
RTM	Maximum (lethal) temperature
RTO	Optimum temperature for respiration
RX	Calculated parameter
warn	Logical, whether to issue warnings about calculations, default TRUE

Details

This function calculates temperature effects on respiration using: V = (RTM - temperature) / (RTM - RTO) ft = V^RX × exp(RX × (1 - V))

Special cases: - When temperature >= RTM: returns 0.000001 (lethal temperature) - When ft < 0: returns 0.000001 (mathematical protection)

Note: Negative values can occur with certain RX parameters, hence the minimum bound.

Value

Temperature factor

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