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    Öğe
    Examination of Ammonium Removal Efficiency and pH Changes with Natural Adsorbents (Zeolite and Bentonite for Water Quality Applying in Aquaculture
    (Centre Environment Social & Economic Research Publ-Ceser, 2019) Oz, M.; Sahin, D.; Sertasi, E.; Oz, U.; Karsli, Z.; Aral, O.
    Various methods can be used to remove ammonium from the water. In this study, the objective was the adsorption of ammonia by using harmless natural adsorbents. The toxic effect of ammonia on aquatic organisms changes depending on pH values. It was also focused on investigate the effects of the adsorbents on the pH in ammonium adsorption process.In this research, six trial groups (zeolite (Z:7 g.l(-1), 14 g.l(-1)), bentonite (B:7 g.l(-1), 14 g.l(-1)), zeolite+bentonite (Z+B:3.5 g.l(-1) + 3.5 g.l(-1), 7 g.l(-1) + 7 g.l(-1))) with 3 repetitions were created. At the end of the experiment, TAN, NH3 and pH values were calculated 7.15 +/- 0.23, 6.04 +/- 0.16, 8.59 +/- 0.20, 7.69 +/- 0.23, 7.61 +/- 0.16, 6.57 +/- 0.15; 0.28 +/- 0.01, 0.24 +/- 0.01, 0.40 +/- 0.01, 0.41 +/- 0.01, 0.32 +/- 0.01, 0.29 +/- 0.00; 8.10 +/- 10.01, 8.10 +/- 0.01, 8.18 +/- 0.01, 8.24 +/- 0.01, 8.13 +/- 0.00, 8.16 +/- 0.01 for 7 g.l(-1)Z, 14 g.l(-1)Z, 7 g.l(-1)B, 14 g.l(-1)B, 7 g.l(-1)Z+B, 14 g.l(-1)Z+B respectively. There were difference in TAN, NH3 and pH values between the experimental groups (p<0.05). Zeolite and bentonite are natural adsorbent used for removal ammonia in aquaculture. When the data acquired in the experiment are evaluated, it was determined that zeolite have the best values in the same conditions like temperature, initial pH, initial concentration, particles size and amount. An increase in the pH and decrease in NH3 values was also detected in 6 experimental groups, but it was determined that this increase did not exceed the optimum values for aquaculture.
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    Öğe
    THE EFFECT OF HORMONE (17α-METHYLTESTOSTERONE, 17β-ESTRADIOL) USAGE ON DEVELOPMENT, SEX INVERSION AND PIGMENTATION OF ELECTRIC YELLOW CICHLID (Labidochromis caeruleus FRYER, 1956)
    (Corvinus Univ Budapest, 2018) Karsli, Z.; Sahin, D.; Oz, M.; Aral, O.
    This research was designed in order to examinate the effects of 17 alpha-methyltestosterone and 17 beta-estradiol hormone use on the development, growth performance, survival, sex ratio and coloration of the electric yellow cichlid (Labidochromis caeruleus Fryer, 1956). Seven different groups were designed in the study. While no hormones were added to the control diet, 6 different rates of hormones were added to the other groups. Cichlid mean weight was determined as 0.64 +/- 0.01 g, were stored such that three replications for each group. The fish were fed with the feeds for a period of 2 months. At the end of this research, the highest weight gain was determined in the 20 mg kg(-1) 17 alpha-MT group (0.39 +/- 0.17 g). When the sex change rates were evaluated, it was determined that the feminization rates in the 17 beta-ES hormone group were 80.00%, 82.22% and 86.67%, respectively, and all fishes in the 17 alpha-MT hormone group were 100% male. When the results of the physical color analysis were evaluated, it was determined that the best coloration was obtained in the 17 alpha-MT groups. At the end of the study, the 17 alpha-MT hormone was determined to have a better effect than 17 beta-ES hormone on the growth, feed conversation rate, sex change and pigmentation of electric yellow cichlid (Labidochromis caeruleus Fryer, 1956).
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    Öğe
    THE POTENTIAL APPLICABILITY OF NATURAL MINERALS AS FILTER MEDIA FOR MODULATING WATER QUALITY IN AQUATIC ECOSYSTEMS
    (Aloki Applied Ecological Research And Forensic Inst Ltd, 2022) Oz, M.; Sahin, D.; Yilmaz, E.; Oz, U.
    The optimal water quality requirement varies among species, and natural filtration materials can be used in aquatic systems to provide and maintain species-specific water quality parameters. Ammonia is one of the nitrogenous compounds originating from the metabolic wastes of aquatic organisms in aquatic ecosystems. Toxic substances and ammonia can be controlled in various ways by ion exchange and adsorption. In this study, the effects of natural clinoptilolite and diatomite on fresh water parameters were determined. This investigation was conducted by trial groups with 3 replicates for 16 days in two experimental systems. For the first experimental group, 3 g of raw zeolite (Z) was directly placed in a 500 ml freshwater aquarium, and the second experimental group was arranged with 3 g of raw diatomite (D) under the same conditions. The third experimental group was described as the control group (C) without zeolite and diatomite. Water parameters (such as pH and ammonium) were determined daily during the experiment period (8 days). After experiment 1, when zeolite and diatomite reached saturation, a desorption system was created with 3 groups containing 3 replicates, and this period was named experiment 2. During the 8-day period, water parameters were determined 7 times. At the end of the study, it was found that the NH4+- N concentrations different statistically (P < 0.05). pH, temperature and oxygen values did not vary among the experimental groups (P > 0.05). The results suggested that zeolite and diatomite have good adsorption performance for NH4+- N removal from the aqueous environment.