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Impact of Ecological Factors on Fishery-Biological Parameters of Acipenserids under Arid Conditions of a Closed Water Supply Cycle

Author:
Mammaev, M. A., Shikhsabekov, M. M., Rabazanov, N. I., Kurbanov, M. S., Mirzakhanov, M. K., Mammaev, R. M.
Source:
Arid ecosystems 2018 v.8 no.1 pp. 78-81
ISSN:
2079-0961
Subject:
Acipenser ruthenus, arid zones, basins, biomass, blood, dry environmental conditions, ecosystems, oxidative stress, oxygen, pH, stocking rate, water supply, water temperature
Abstract:
The impact of ecological factors (abiotic and biotic) on some fishery-biological parameters is studied with the raising of acipenserids under arid conditions with a closed cycle of water supply (CCWS). The elements of a CCWS include the temperature, pH, oxygen concentration, and an artificial environment with varying oxygen supply. It was found that a significant increase in the content of a marker of oxidative stress is established in the blood of fish raised under a CCWS with an increased oxygen content by the end of experiment (four weeks). An oxygen content below 70% retards growth in the starlet, as food consumption is noticeably decreased. To obtain a high biomass in CCWS complexes, it is necessary to set the water temperature to 21–22°C in the basins of semidesert climate conditions and to have a stocking density of 60 kg/m³ for the commercial growth of sterlet.
Agid:
5910068