1. Laboratory of Animal Physiology, Department of Zoology, School of Biology, Aristotle University of Thessaloniki, University Campus, GR-54124 Thessaloniki, Greece
2. Department of Fisheries & Aquaculture, University of Patras, Nea Ktiria, GR-26504 Mesolonghi, Greece
3. Department of Animal Science, Faculty of Agricultural Sciences, University of Western Macedonia, Terma Kontopoulou, GR-53100 Florina, Greece