1. Council for Agricultural Research and Economics, Research Centre for Animal Production and Aquaculture (CREA-ZA), 85051 Bella-Muro (Potenza), Italy
2. School of Agriculture, Forestry, Food and Environmental Sciences, University of Basilicata, 85100 Potenza, Italy
3. Institute of Biosciences and Bioresources, CNR (National Research Council), 70126 Bari, Italy