Modelling of nutrient partitioning in growing pigs to predict their anatomical body composition. 1. Model description
| Autor: | Veronika Halas, Walter J. J. Gerrits, L. Babinszky, M.W.A. Verstegen, Jan Dijkstra |
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| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Animal Nutrition
Swine Metabolite Lysine Muscle Proteins Medicine (miscellaneous) Adipose tissue Growth fattening pigs Biology Models Biological chemistry.chemical_compound Nutrient Animal science Animals Growth rate feeding level Nutrition and Dietetics finishing gilts 45 Proteins lipid accretion Metabolism Diervoeding kg liveweight muscle protein-turnover Adipose Tissue Biochemistry chemistry 85 kilograms Body Composition WIAS earlier life Animal Nutritional Physiological Phenomena Female Composition (visual arts) Allometry chemical-composition Energy Intake Energy Metabolism energy-intake |
| Zdroj: | British Journal of Nutrition 92 (2004) 4 British Journal of Nutrition, 92(4), 707-723 |
| ISSN: | 0007-1145 |
| DOI: | 10.1079/bjn20041237 |
| Popis: | A dynamic mechanistic model was developed for growing and fattening pigs. The aim of the model was to predict growth rate and the chemical and anatomical body compositions from the digestible nutrient intake of gilts (20–105 kg live weight). The model represents the partitioning of digestible nutrients from intake through intermediary metabolism to body protein and body fat. State variables of the model were lysine, acetyl-CoA equivalents, glucose, volatile fatty acids and fatty acids as metabolite pools, and protein in muscle, hide–backfat, bone and viscera and body fat as body constituent pools. It was assumed that fluxes of metabolites follow saturation kinetics depending on metabolite concentrations. In the model, protein deposition rate depended on the availability of lysine and of acetyl-CoA. The anatomical body composition in terms of muscle, organs, hide–backfat and bone was predicted from the chemical body composition and accretion using allometric relationships. Partitioning of protein, fat, water and ash in muscle, organs, hide–backfat and bone fractions were driven by the rates of muscle protein and body fat deposition. Model parameters were adjusted to obtain a good fit of the experimental data from literature. Differential equations were solved numerically for a given set of initial conditions and parameter values. In the present paper, the model is presented, including its parameterisation. The evaluation of the model is described in a companion paper. |
| Databáze: | OpenAIRE |
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