INDUSTRIAL METHODS OF CULTIVATION OF STERLET (ACIPENSER RUTHENUS) IN THE CONDITIONS OF DAGESTAN
https://doi.org/10.18470/1992-1098-2017-3-33-42
Abstract
Aim. The aim of the research is to study the influence of various environmental factors (abiotic and biotic) on some fish-biological indicators in the cultivation of sturgeons with the use of a recirculating aquaculture system (RAS). Methods. A complete biological analysis was carried out according to the generally accepted ichthyological methods. Monitoring of the hydrochemical regime in the RAS was carried out throughout the study period. The temperature and pH of water were measured daily and the concentration of oxygen in the basins was measured three times a day. Results. Taking into account that the fish specimens studied did not show any pathology and also taking into consideration their genetic homogeneity and absolutely identical conditions in the RAS, the findings obtained can be explained by the different degree of oxygen supply under artificial growth conditions. The results of the biochemical analysis show that the blood of fish grown in the RAS with an elevated oxygen content (experimental group) by the end of the experiment (4 weeks) contains an increased amount of malondialdehyde (MDA) which could lead to the observed difference in the dynamics of growth parameters of the young of the year. Conclusions. When the oxygen content of the water is below 70% the growth rate slows down, as food consumption is almost halved, while the saturation of O2 by 40% is considered critical. When sterlet is grown to produce a high mass, it is necessary to set the temperature of the water in the pools in the interval of 21-220°C in the ultrasonic complexes. For industrial cultivation of sterlet, we recommend using a planting density of 60 kg/m3.
About the Authors
Magomed A. Mammayev
Dagestan State University
Russian Federation
senior lecturer, FSBEI of Higher Education, Dagestan State University, Russia, 367023, Makhachkala, 43a M. Gadzieva
Russian Federation
senior lecturer, FSBEI of Higher Education, Dagestan State University, Russia, 367023, Makhachkala, 43a M. Gadzieva
Magomed M. Shikhshabekov
Dagestan State University
Russian Federation
Doctor of Biological Sciences, Professor, Honored Worker of Nature Protection, Honored Worker of Science, Dagestan State University, Makhachkala, Russia.
Russian Federation
Doctor of Biological Sciences, Professor, Honored Worker of Nature Protection, Honored Worker of Science, Dagestan State University, Makhachkala, Russia.
Nukhkadi I. Rabazanov
Dagestan State University;
Precaspian Institute of Biological Resources, Dagestan Scientific Center of RAS
Russian Federation
Doctor of Biological Sciences, lead of the sub-department of Ichthyology, Faculty of Biology, Dagestan State University; acting director of The Caspian Institute of Biological Resources, Makhachkala, Russia
Russian Federation
Doctor of Biological Sciences, lead of the sub-department of Ichthyology, Faculty of Biology, Dagestan State University; acting director of The Caspian Institute of Biological Resources, Makhachkala, Russia
Magomed S. Kurbanov
Dagestan State University
Russian Federation
Candidate of Biological sciences, senior lecturer at the sub-department of Ichthyology, Dagestan State University, Makhachkala, Russia
Russian Federation
Candidate of Biological sciences, senior lecturer at the sub-department of Ichthyology, Dagestan State University, Makhachkala, Russia
Magomed K. Mirzakhanov
Dagestan State University
Russian Federation
Candidate of veterinary sciences, senior lecturer at the sub-department of Ichthyology, Dagestan State University, Makhachkala, Russia.
Russian Federation
Candidate of veterinary sciences, senior lecturer at the sub-department of Ichthyology, Dagestan State University, Makhachkala, Russia.
Ruslan M. Mammayev
Dagestan State University
Russian Federation
Master of 2nd year of studies, Biological Faculty, Dagestan State University, Makhachkala, Russia.
Russian Federation
Master of 2nd year of studies, Biological Faculty, Dagestan State University, Makhachkala, Russia.
Shakhrudin A. Gunashev
M.M. Dzhambulatov Dagestan State Agrarian University
Russian Federation
Candidate of veterinary sciences, Associate Professor of the Department of Epizootology, M.M. Dzhambulatov Dagestan State Agrarian University, Makhachkala, Russia
Russian Federation
Candidate of veterinary sciences, Associate Professor of the Department of Epizootology, M.M. Dzhambulatov Dagestan State Agrarian University, Makhachkala, Russia
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Review
For citations:
Mammayev M.A., Shikhshabekov M.M., Rabazanov N.I., Kurbanov M.S., Mirzakhanov M.K., Mammayev R.M., Gunashev Sh.A. INDUSTRIAL METHODS OF CULTIVATION OF STERLET (ACIPENSER RUTHENUS) IN THE CONDITIONS OF DAGESTAN. South of Russia: ecology, development. 2017;12(3):33-42. (In Russ.) https://doi.org/10.18470/1992-1098-2017-3-33-42
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