1. Department of Ichthyology and Aquatic Environment, School of Agricultural Sciences; University of Thessaly; Volos 384 46 Greece
2. Institute of Systematics and Ecology of Animals; Siberian Branch of Russian Academy of Sciences; 11 Frunze Street, Novosibirsk 630091 Russia Tomsk State University, Tomsk, 634050, Russia
3. Department of Fisheries and Aquaculture Technology; Technological Educational Institute of Western Greece; Mesolonghi 30 200 Greece
4. Department of Renewal Marine Resources; Institute of Marine Sciences (CSIC); Passeig Marítim de la Barceloneta 37-49, Barcelona 08003 Spain
5. Unitat de Cultius Experimentals; IRTA-SCR, Institut de Recerca i Tecnologia Agroalimentàries; Crta. PobleNou km 5.5, Sant Carles de la Ràpita 43540 Spain