Browsing by Author "Sazykina M."

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Assessing contamination in sturgeons grown in recirculating a uaculture system by Lu - Biosensors and metal accumulation
(2016-01-01) Sönmez A.Y.; Sazykina M.; Bilen S.; Gültepe N.; Sazykin I.; Khmelevtsova L.E.; Kostina N.V.
In the present study, it was aimed to assess of the quality of fish grown in a recirculation aquaculture system (RAS). For this purpose, three sturgeon species especially i en e el en tae tii, i en e ae ii, and i en e tellat were investigated. Concentrations of certain metals (Cu, Cd, Pb, Zn, Fe, Ni) in gills, liver and muscle samples were examined. Metal concentrations in i en e el en tae tii were; Fe:172.43-196.52 μg g-1, Cd: 0.21-0.33 μg g-1, Cu: 29.65-45.11 μg g-1, Ni: 0.52-0.86 μg g-1, Pb: 14.24-19.63 μg g-1, and Zn: 60.13-88.15 μg g-1. In i en e ae ii, metal concentrations were; Fe: 151.47-182.32 μg g-1, Cd: 0.18-0.36 μg g-1, Cu: 27.17-38.52 μg g-1, Ni: 0.72-0.98 μg g-1, Pb:16.45-25.16 μg g-1, and Zn: 72.14-95.41 μg g-1. Concentrations in i en e tellat were; Fe: 206.39-262.38 μg g-1, Cd: 0.26-0.39 μg g-1, Cu:30.26-55.63 μg g-1, Ni: 0.54-0.87 μg g-1, Pb:14.36-21.51 μg g-1, and Zn: 53.52-82.15 μg g-1. In general, the highest metal levels were found in i en e ae ii. Negative biological effects caused by the presence of various toxicants in fish tissues were studied with bacterial lux-biosensors. These assays revealed that the accumulation of genotoxicants, oxidative stressors, and substances causing damage to proteins and membranes mainly occurred in gills and to a smaller extent in liver. i en e ae ii showed the highest accumulation of toxic substances according to the bacterial luxbiosensor assays.
Comparative study of haematological parameters of three sturgeon species in recirculating aquaculture system
(2017-01-01) Gultepe N.; Sazykina M.; Sazykin I.; Sonmez A.Y.; Khmelectsova L.E.; Khammami M.I.
The aim of this study was to evaluate and compare the haematological parameters of cultured Russian sturgeon (Acipenser gueldenstaedtii), stellate sturgeon (Acipenser stellatus) and Siberian sturgeon (Acipenser baerii) in recirculating aquaculture system. Total erythrocytes, thrombocytes, red blood cell distribution, monocytes, basophils as well as haemoglobin levels of stellate sturgeon differed significantly from that of the other two species (p<0.05). Leukocyte and lymphocyte levels of Siberian sturgeon were significantly higher than in stellate sturgeon and Russian sturgeon (p<0.05). Eosinophil percentages of Siberian sturgeon were significantly lower than stellate sturgeon and Russian sturgeon (p<0.05). Haematocrit levels of stellate sturgeon differed from Siberian sturgeon (p<0.05), but no differences between Siberian and Russian sturgeons were found. Neutrophil, mean cellular haemoglobin and mean cellular volume and mean cellular haemoglobin concentration levels did not differ significantly between the three sturgeon species (p>0.05). The information generated may help in monitoring health status and to adopt better management strategies in culture systems.