Browsing by Author "Sonmez A."

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An adaptive neuro-fuzzy inference system (ANFIS) to predict of cadmium (Cd) concentrations in the filyos river, Turkey
(2018-01-01) Sonmez A.; Kale S.; Ozdemir R.; Kadak A.
Water quality is one of the main characteristics of a river system and prediction of water quality is the key factor in water resource management. Different physical, biological and chemical parameters including heavy metals can be used to assess river water quality. Evaluation of the water quality in the rivers is quite difficult and requires more time and effort because of the fact that many factors affect water quality. Traditional data processing methods are insufficient to solve this problem. Therefore, in this study, an adaptive neuro-fuzzy inference system (ANFIS) model was developed to predict the concentrations of cadmium (Cd) in the Filyos River, Turkey. For this purpose, water samples collected at 7 sampling locations in the river during December 2014-2015 were used to develop ANFIS model. The available data set was apportioned into two separate sections for training and testing the ANFIS model. Developed models aimed to use the least parameters to estimate Cd concentration. As a result, a relatively higher correlation (R2=0.91) was found between observed and modelled Cd concentrations. The results indicated that the ANFIS model gave reasonable estimates for the concentrations of Cd with a high degree accuracy and robustness. In conclusion, this paper suggests that ANFIS methodology produce very successful findings and has the ability to predict Cd concentration in water resources. The outcomes of this research provide more information, simulation, and prediction about heavy metal concentration in natural aquatic ecosystems. Therefore, ANFIS can be used in further researches on water quality monitoring.
Effects of tetra (Cotinus coggygria) and common mallow (Malva sylvestris) plant extracts on growth performance and immune response in Gilthead Sea bream (Sparus aurata) and European Sea bass (Dicentrarchus labrax)
(2019-10-15) Bilen S.; Kenanoglu O.; Terzi E.; Ozdemir R.; Sonmez A.
In this study, effects of tetra (T) (Cotinus coggygria) and common mallow (CM) (Malva sylvestris) aqueous methanolic extracts on growth performance and immune response in gilthead sea bream, Sparus aurata (19.92 ± 0.40 g) and European sea bass, Dicentrarchus labrax (18.66 ± 0.86 g) were investigated. The experiment was designed as 5 treatment groups: control (0 mg/kg), 500 mg kg−1 (CM500, T500) and 1000 mg kg−1 (CM1000, T1000) for each fish species. Fish were fed the diet supplemented with tetra and common mallow extracts for 60 days and blood samples were collected on the 30th and 60th days of the study. Immunological parameters, such as respiratory burst, phagocytic, lysozyme, myeloperoxidase and bacterial killing activities were determined. At the end of feeding trial, fish were challenged with Vibrio anguillarum infection and survival rate was recorded. Final weight of the both experimental fishes were significantly increased in CM treatment groups compared to control (P <.05). No difference was observed in FCR values in sea bass (P >.05), whereas a decrease in FCR was noticed in CM treatment groups of sea bream (P <.05). Moreover, oxidative radical production was significantly increased in sea bass in all treatment groups at all sampling times. In sea bream, it increased in T500 and CM500 groups on 30th day, and only in CM groups on 60th day compared to control (P <.05). Phagocytic activity was significantly increased in sea bass received only tetra extract on the 30th day compared to control (P <.05) and in all treatment groups except T1000 on 60th day. In sea bream, phagocytic activity was enhanced in all treatment groups on 30th day and only in CM500 and T1000 groups on 60th day. Lysozyme activity was elevated in all treatment groups at all sampling times in sea bass, and in T500 and T1000 groups of sea bream. Myeloperoxidase activity increased in both the fish species at any sampling time compared to that of control (P <.05). Survival rate was significantly higher in treatment groups compared to control of both fish species. These results suggest that both tetra and common mallow could be used as immunostimulants for European sea bass and sea bream with an added advantage of common mallow as a growth promoter.
Mucus from different fish species alleviates carrageenan-induced inflammatory paw edema in rats
(2020-10-01) Hitit M.; Corum O.; Ozbek M.; Uney K.; Terzi E.; Arslan G.; Sonmez A.
Objective: To determine the anti-inflammatory effects of mucus obtained from different fish species on the carrageenan-induced acute paw edema in rats. Methods: Forty-two rats were randomly divided into seven groups. Acute paw edema was induced by 0.1 mL of 1% carrageenan, and a single dose of diclofenac and lyophilized mucus (25 mg/kg) of rainbow trout, brook trout, European sea bass, and gilthead sea bream were administered to rats through gastric gavage 1 h before carrageenan treatment. Rat paws were measured before and 1-4 h after carrageenan treatment. The mRNA expressions of cytokines (TNF-α, IL-1β, IL-6, IL-10, and TGF-β), antioxidant markers (catalase and superoxide dismutase), and COX-2 were investigated using quantitative polymerase chain reaction. The histopathological changes were evaluated by hematoxylin and eosin staining. Results: The inhibition percentage of carrageenan-induced paw edema by different fish mucus ranged from 52.46% to 74.86% at 4 h. Histopathological evaluation showed that all fish mucus diminished carrageenan-induced edema and inflammatory cell infiltration. The upregulation of IL-1β mRNA induced by carrageenan was decreased by the mucus of rainbow trout and gilthead sea bream while an increase in the expression of IL-6 mRNA was reduced by the mucus of rainbow trout, brook trout, and gilthead sea bream. In addition, the mRNA expression of superoxide dismutase was higher in the rainbow trout mucus group than the carrageenan group. Conclusions: Mucus obtained from different fish species may have anti-inflammatory effects.