In: Hyper Article en Ligne - Sciences de l'Homme et de la Société ; The value chains of Mediterranean sheep and goat products. Organisation of the industry, marketing strategies, feeding and production systems ; Joint Seminar of the Subnetworks on Nutrition and on Production Systems of the FAO-CIHEAM Network for Research and Development in Sheep and Goats ; Joint Seminar of the Subnetworks on Nutrition and on Production Systems of the FAO-CIHEAM Network for Research and Development in Sheep and Goats, Jun 2015, Saragosse, Spain. pp.333-342, 2015