shflux
Contents
Syntax
shflux (j)
Description
Routine produces eight plots that show fluxes of compounds as functions of the scaled length, for scaled functional responses f = 1, 0.8, 0.6, ... The lowest value of f still has an ultimate length larger than l_b, which depends on other parameter values. The range of the scaled lengths is from 0 to f. See pages 138 ff of the HREF="http://www.bio.vu.nl/thb/research/bib/Kooy2010.html">DEB-book</A.
The animal develops through the embryo (red), juvenile (blue) and adult (green) stages. The combination of the eight fluxes fully specify the interaction of the animal with its environment. All fluxes are expressed in mol per time.
Input
- optional scalar with figure number
Output figures
- fig 1 Food; negative, because it disappears.
- fig 2 Structural mass; note that the fluxes are zero when the animal is fully grown; this occurs at structural length l = f.
- fig 3 Reserve mass; the flux is negative during the embryonal stage. During the adult state, the flux adds the production of the reserve of the individual, and that of the offspring. The first contribution is zero for scaled length l = f, because no new reserves are produced in a fully grown individual (because of weak homeostasis).
- fig 4 Faeces; proportional to food, but positive, because it appears.
- fig 5 Carbon dioxide; usually positive, but can become negative, depending on parameter values.
- fig 6 Water; usually positive.
- fig 7 Dioxygen; usually negative
- fig 8 Nitrogen waste (frequently ammonia for animals that live in water); usually positive
Remarks
The discontinuities between the different stages relate to the switches of assimilation and reproduction.
Example of use
after editing pars_animal: clear all; pars_animal; shflux.