Open AccessFEATURES OF SAPROLEGNIOZA OF PIKEPERCH (SANDER LUCIOPERCA) ROE IN THE VOLGA DELTA
Author(s) -
Lidia Mikhailovna Vasilieva,
Lyubov Vladimirovna Lartseva,
Olga Valentinovna Obukhova
Publication year - 2017
Publication title -
vestnik astrahanskogo gosudarstvennogo tehničeskogo universiteta. seriâ: rybnoe hozâjstvo
Language(s) - English
Resource type - Journals
eISSN - 2309-978X
pISSN - 2073-5529
DOI - 10.24143/2073-5529-2017-2-70-79
Subject(s) - biology , hatchery , pike , ecology , fishery , botany , fish <actinopterygii>
The article touches upon the saprolegnioza of pike-perch ( Sander lucioperca ) roe during its artificial reproduction at the Alexandrovsky sturgeon hatchery (the Astrakhan region). As the material for investigation there were used 20 samples of infected roe, water from incubators and water source. There have been selected 14 representatives of microbiota from the biotopes under study. Simultaneously with collection of mycological samples, there have been registered data on hydrochemical regime - water temperature, oxygen content in water and pH environment. In resent years there have been found great changes in the studied habitats decreased representatives of Oomycetes of the genera Saprolegnia, Achlya, Aphanomyces, Dictyuchus on the background of increase in the proportion of all mycobiota imperfect fungi species Alternaria, Aspergillus, Fusarium and Penicillium. The dominant fungi were of the genera Aspergillus and Fusarium, produce mycotoxins. Apparently, they are in modern ecological conditions inhibit the development of fungi saprolegniales without such features. There have been alleged links of hatchery eggs with quality physiological state of manufacturers redundant from autumn to spring in hibernating ponds. The findings suggest the need to look for new effective fungicides to combat disease caviar, in relations to micromycetes.