This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. Oceanological and Hydrobiological Studies will cease to be published with Springer by the end of 2014. The journal will continue to be published by De Gruyter Open. Received: 28 Jan 2017; Accepted: 23 Mar 2017; Published online: September 27, 2017. |