Anti-overgrowth finishing of fishing nets by using biocides of low toxicity to the aquatic environment
Bulletin of the Sea Fisheries Institute 1 (140) 1997, pp. 77-96

Janusz Zaucha and Małgorzata Matulaniec
Sea Fisheries Institute, Kołłątaja 1, 81-332 Gdynia, Poland

Key words: fishing nets, anti-overgrowth substances, biocides, marine environment, nontoxicity.

In the paper, research on the anti-overgrowth properties of biocides (tributyl tin oxide, Busan and Sea-Nine 211) used in fishing nets is presented. This research was aimed at developing methods of net finishing with such substances that would protect them from being overgrown, and at the same time, be of flow toxicity to the environment. In the tests, the best results were produced by the biocide used so far, which, however, is highly toxic to the environment. Two other biocides - Sea-Nine 211 in the cable coating A and Busan in the polyvinyl acetate copolymer carrier - also produced relatively good results.Conslusions from this research point to the possibility of replacement of toxic fishing net finishing substances with substances harmless to the marine environment. They also make it possible to direct further research so as to select the best concentration of the Sea-Nine biocide and to search for a better carrier for it.