1. Laboratory of Animal Physiology, Department of Zoology, School of Biology, Faculty of Science, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece
2. Department of Fisheries & Aquaculture, University of Patras, GR-26504 Mesolonghi, Greece
3. Department of Animal Science, Faculty of Agricultural Sciences, University of Western Macedonia, GR-531 00 Florina, Greece
4. School of Veterinary Medicine, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece