This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0).

Artykuł zamieszczono w sekcji: Aquatic Biology.

This research was funded by the bilateral international cooperative projects ‘‘SECEB’’ and ‘‘ERES’’ between GMGS, China Geological Survey, China and University of Szczecin, Poland (from the National Research Centre (NCN) in Cracow, Poland),

This work was also supported by the ‘‘DIOMAT’’ project (Polish NCN Project to J. Zhang), by the Guangdong Basic and Applied Basic Research Foundation, and by the GMGS implement projects,