respiration-functions: Respiration Functions for FB4 Model

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

Respiration Functions for FB4 Model

Description

Functions implementing the two respiration temperature-dependence equations (REQ 1–2), activity correction, and conversion of oxygen consumption to energy units. Respiration is modelled as:

R = RA \cdot W^{RB} \cdot F(T) \cdot \mathrm{ACT}

where RA and RB are species-specific intercept and slope coefficients, W is body mass (g), F(T) is a temperature function, and \mathrm{ACT} is an activity multiplier.

REQ 1 — simple Q10 exponential with activity: F(T) = e^{RQ \cdot T}; velocity-based activity from Kitchell et al. (1977).

REQ 2 — Kitchell et al. (1977): F(T) = V^{RX} \cdot e^{RX(1-V)}, where V = (RTM - T)/(RTM - RTO).

Oxygen consumption is converted to energy using the oxycalorific coefficient (default 13 560 J g^{-1} O_2; Elliott and Davison 1975).

Value

No return value; this page documents the respiration functions module. See individual function documentation for return values.

References

Kitchell, J.F., Stewart, D.J. and Weininger, D. (1977). Applications of a bioenergetics model to yellow perch and walleye. Journal of the Fisheries Research Board of Canada, 34(10), 1922–1935. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1139/f77-258")}

Elliott, J.M. and Davison, W. (1975). Energy equivalents of oxygen consumption in animal energetics. Oecologia, 19(3), 195–201. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1007/BF00345305")}

Hanson, P.C., Johnson, T.B., Schindler, D.E. and Kitchell, J.F. (1997). Fish Bioenergetics 3.0. University of Wisconsin Sea Grant Institute, Madison, WI.

Deslauriers, D., Chipps, S.R., Breck, J.E., Rice, J.A. and Madenjian, C.P. (2017). Fish Bioenergetics 4.0: An R-based modeling application. Fisheries, 42(11), 586–596. \Sexpr[results=rd]{tools:::Rd_expr_doi("10.1080/03632415.2017.1377558")}

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