Open AccessEFFECT OF DIETHANOLAMINE ON SURVIVAL OF EMBRYOS AND LARVAE OF STELLATE STURGEON (ACIPENSER STELLATUS PALLAS)
Author(s) -
Nuria Abdrakhimovna Kanieva
Publication year - 2019
Publication title -
vestnik astrahanskogo gosudarstvennogo tehničeskogo universiteta. seriâ: rybnoe hozâjstvo
Language(s) - English
Resource type - Journals
eISSN - 2309-978X
pISSN - 2073-5529
DOI - 10.24143/2073-5529-2019-2-80-85
Subject(s) - toxicant , sturgeon , diethanolamine , hatching , acipenser , biology , embryo , toxicology , larva , zoology , fishery , ecology , fish <actinopterygii> , toxicity , chemistry , biochemistry , organic chemistry
The article presents the experimental data on the toxic properties of one of the main components of sewage waters of gas processing enterprises - diethanolamine. Diethanolamine is a highly toxic organic compound, its negative effect on the embryonic development of fish in the Volga-Caspian basin becomes apparent at minimal concentrations.The object of study was the developing caviar of stellate sturgeon ( Acipenser stellatus Pallas) put into diethanolamine solutions at the stage of eight blastomeres. The experiment lasts 15 days. The toxicity level and mechanism of the toxicant activity were determined by the degree of changes in morphometric parameters, behavioral reactions (general symptom complex of poisoning), physiological state and survival of organisms. It has been stated that diethanolamine causes significant changes in morphological and functional parameters of developing stellate sturgeon embryos and larvae. The greater is the toxicant concentration, the greater are the changes. There has been found the dependence of the degree of negative impact on the fish physiological state on the time of their staying in diethanolamine solutions, as well as on the stage of ontogenesis. Using the integrated approach combining toxicological, ichthyological, and physiological areas of research has revealed uneven development of embryos, decrease in their physical activity, impaired pigmentation of the integument, slowdown in growth and development, and a decrease in survival. In experimental reservoirs there was found an increase of the duration of the hatching process, as well as the growing number of individuals developing with deviations from the standard indices. The increasing concentration of the toxicant and residence time of the planting material in its solutions led to an increase in the total waste of the roe, prelarvae, and larvae of stellate sturgeon in the experimental reservoirs in comparison with the control ones.