Browsing by Author "Sonmez A.Y."

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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.
Effect of Ginseng root (Araliaceae sp.) extracts on sperm quality parameters and reproductive performance in rainbow trout (oncorhynchus mykiss)
(2019-01-01) Sonmez A.Y.; Ozdemir R.C.; Bilen S.; Kadak A.E.
In this study, ginseng root extract was manufactured and used as a food additive for 8 to 9-month old male rainbow trout (Oncorhynchus mykiss). The extracts were added to the food in two different ratios, 1 g/kg and 2 g/kg. The control group was given a commercial feed with no additive. The fish ate the provided feed for 120 days ad libitum. Sperm samples were taken from fish every 30 days. We observed that the gonadosomatic index (GSI) in the experimental groups was higher than in the control group. Motility duration of groups 1 and 2 was 10 seconds more than the control group. Sperm density averages (SDA) were 7.74±0.61x109, 8.62±0.53 x109 and 11.27±0.78x109, respectively. All sperm samples taken from each experimental group were used for fertilization. Fertilization ratios of control and experimental groups were 65±10%, 84.9±5% and 90±6%, respectively. The hatching ratio was also very high in the extract added groups compared to the control group.
Fuzzy logic evaluation of water quality classification for heavy metal pollution in karasu stream, Turkey
(2013-01-01) Sonmez A.Y.; Hasiloglu S.; Hisar O.; Aras Mehan H.N.; Kaya H.
Traditional water quality evaluation methods use discrete form that involve upper and lower limits, and the concentrations values are equally important when the values are near to or far away from the limits. Moreover, each quality parameter might belong to one of the four classes; therefore differences of the classes of the parameters may be vagueness. In this study, an index model is purposed for quality evaluation of water quality classification using fuzzy logic. For that purpose, a data set (12 months, total 180 measurements) about several heavy metals such as Copper (Cu), Zinc (Zn), Manganese (Mn), Lead (Pb), Nickel (Ni), Cadmium (Cd) and Iron (Fe) was collected from 5 monitoring stations in Karasu River. After that, fuzzy logic assessment method was used to quality evaluation for heavy metal pollution in Karasu stream. In conclusion, it was supposed that fuzzy logic evaluation method may also be used as an alternative tool for decision-making in environmental management.
Plasma and muscle tissue disposition of enrofloxacin in Nile tilapia (Oreochromis niloticus) after intravascular, intraperitoneal, and oral administrations
(2022-01-01) Corum O.; Terzi E.; Durna Corum D.; Tastan Y.; Gonzales R.C.; Kenanoglu O.N.; Arriesgado D.M.; Navarro V.R.; Bilen S.; Sonmez A.Y.; Uney K.
The aim of the study was to investigate the plasma and muscle pharmacokinetic of enrofloxacin (ENR) and its active metabolite ciprofloxacin (CIP) in Nile tilapia (Oreochromis niloticus) following single intravascular (IV), intraperitoneal (IP), or oral (PO) administration at 30 ± 1 °C. In this study, 234 healthy Nile tilapia (120–150 g) were used. The fish received a single IV, IP, or PO treatment of ENR at a dose of 10 mg/kg. The plasma and muscle tissue concentrations of ENR and CIP were measured using high–performance liquid chromatography with fluorescence detection and were evaluated using non–compartmental analysis. The elimination half–life, volume of distribution at steady state, and total body clearance of ENR were 21.7 h, 2.69 L/kg, and 0.09 L/h/kg, respectively. The peak plasma concentrations of ENR after IP or PO administration were 6.11 and 4.21 µg/mL at 0.25 and 2 h, respectively. The bioavailability of ENR for IP or PO routes was 78% and 86%, respectively. AUC(0–120)muscle/AUC(0–120)plasma ratios following the IV, IP, or PO administrations were 1.43, 1.49, and 1.07, respectively. CIP was detected after all routes, but the AUC0–last ratios of CIP to ENR were <1.0% for plasma and muscle. ENR was detected up to 120 h following the IV, IP, or PO administrations. The long residence time of ENR after single IV, IP, or PO administration ensured the plasma concentration was ≥1 × MIC for bacteria with threshold MIC values of 0.92, 0.72, and 0.80 μg/mL over the whole 120 h observed. However, further studies are necessary to determine the optimum pharmacokinetic/pharmacodynamics data of ENR for the treatment of infections caused by susceptible bacteria in tilapia.