Predicting changes in food energy requirements due to genetic changes in growth and body composition of growing ruminants

beef cattle bovin bovin de boucherie breeding methods breeding programmes canal animal carcasse carcasses cattle corps gras costos costs crecimiento croissance energia energie energy energy requirements fats feed intake feed requirements ganado bovino ganado de carne genetica genetics grasas growth modele modelos models peso poids prise alimentaire (animaux) raciones ration rations rumiante ruminant ruminants weight