Fixed seines, which are set up along the entire coast in the Black and Azov Seas to catch anchovy, sprat, silverside, red mullet, horse mackerel, garfish, herring, mullet, smarida, bluefish and other fish species, are the most sensitive and vulnerable to the negative impact of jellyfish. They are installed in the coastal zone (in bays, gulfs, estuaries in shallow waters) exactly where there is a mass accumulation of jellyfish. The problem is that the accumulation of jellyfish interferes with the normal movement of fish into the cage, which leads to low catches, and fishermen often remove their fishing gear and wait out the invasion of jellyfish.
Scientists suggest that fishermen use jellyfish baffles. The principle of operation of such baffles is designed so that a significant part of the jellyfish will be retained by them and taken away from the trap of the fixed seine.
The branch employees have developed an improved fixed seine that solves the problem of separating jellyfish from the main catch (anchovy, tulka, sprat, horse mackerel, red mullet, etc.), with the ability to separately select the by-catch of jellyfish and the main catch.
The methods proposed by scientists to reduce the negative impact of jellyfish on fixed seines will help fishermen reduce the impact of jellyfish on their fishing gear and, ultimately, increase their fishing efficiency in the modern conditions of mass development of jellyfish.
Press service of VNIRO
