The Carcass (growth of beef cattle) model

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Description

Model description.

The model is defined by 20 equations, with a total of 19 parameters for the described process.

Usage

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  carcass.model(protcmax, protncmax, alphac, alphanc,
    gammac, gammanc, lip0, lipc1, lipnc1, beta, delta, k,
    b0c, b1c, b0nc, b1nc, c0, c1, cem, duration)

Arguments

protcmax

: amounts of protein in the carcass of the adult animal (kg)

protncmax

: amounts of protein in the 5th district of the adult animal (kg)

alphac

: maximum protein synthesis rate in the frame (excluding basal metabolism) (j-1)

alphanc

: maximum rate of protein synthesis in the 5th district (except basal metabolism) (j-1)

gammac

: Maximum rate of protein degradation in the frame (excluding basal metabolism) (j-1)

gammanc

: maximum rate of protein degradation in the 5th district (except basal metabolism) (j-1)

lip0

: maximum lipid concentration to the theoretical physiological age (percent)

lipc1

: increase coefficient of the maximum lipid concentration with the physiological age of the carcase (percent)

lipnc1

: increase coefficient of the highest lipid concentration with physiological age area in the 5th (percent)

beta

: lipid synthesis rate (j-1)

delta

: lipid degradation rate (d-1)

k

: Parameter coefficient between the half-saturation of the Michaelis-Menten equation of the metabolic weight (MJ.kg^0.75)

b0c

: coefficient of the allometric equation linking mass and lipid-protein carcass

b1c

: exponent allometric equation linking mass and defatted protein carcass

b0nc

: coefficient of the allometric equation linking mass and lipid-protein 5th district

b1nc

: exponent allometric equation linking mass and lipid-protein 5th district

c0

: coefficient of the allometric equation between live weight and live weight empty

c1

: exponent allometric equation linking body weight and live weight empty

cem

:

duration

: duration of simulation

Value

data.frame with ProtC,LipC,ProtNC,LipNC,PV

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