1. Institute of Oceanography and Fisheries, Šetalište Ivana Meštrovića 63, 21000 Split, Croatia; e-mail: tutman@izor.hr
2. University of Zagreb, Faculty of Science, Rooseveltov trg 6, 10000 Zagreb, Croatia; e-mail: ivana.buj@biol.pmf.hr, zoran.marcic@biol.pmf.hr
3. University of Zagreb, Faculty of Teacher Education, Savska 77, 10000 Zagreb, Croatia; e-mail: marko.caleta@ufzg.hr
4. University of Sarajevo, Faculty of Science, Zmaja od Bosne 33-35, 71000 Sarajevo, Bosnia and Herzegovina; e-mail: haadem@hotmail.com
5. University of Tuzla, Faculty of Science, Univerzitetska 4, 75000 Tuzla, Bosnia and Herzegovina; e-mail: avdul.adrovic@untz.ba