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Öğe Adsorption Process of Ammonium by Natural Zeolite (Clinoptilolite) from Aqueous Solution for Aquaculture Application(2019) Şahin, Dilek; Öz, Meryem; Sertaşı, Eda; Öz, Ünal; Karslı, Zafer; Aral, Mustafa OrhanAmmonia is an important nutrient in primary production, but high ammoniaconcentration is directly or indirectly toxic to many species of aquatic organisms.Ammonia and other toxic metabolites can be managed by adsorption and ionexchange. Zeolite is naturally occurring structured, aluminosilicate with highcation exchange and ion adsorption capacity. The purpose of this study was todetermine the effects of zeolite on the ammonium adsorption at different particlesizes (0.075 mm, 3-5 mm) and adsorbent dosages (5 g/l, 10 g/l, 15 g/l) fromaquatic solution. This research was conducted by trial groups with 3 repetitionsduring 330 min. Water temperature, pH, dissolved oxygen and ammonium valueswere measured during the trial period at regular intervals. Depending on therelevant literature, TAN (Total Ammonium Nitrogen) and adsorption efficiencywere also calculated. This study values showed a decrease of TAN concentrationin all the groups with increasing contact time. For different particle size andadsorbent dosage of zeolite, the best efficiency (44.1%) is determined at added 15g/l and 0.075 mm zeolite group (P˂0.05). Our results revealed that zeolite mightbe used for ammonia removal in aquaculture.Öğe Denizsuyunda ve Tatlısuda Ağ Kafeslerde Yetiştirilen Gökkuşağı Alabalığı (Oncorhynchus mykiss W.,1792)'nın Gelişme Farklılıklarının Karşılaştırılması(Fırat Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, 2004) Öz, ÜnalBu araştırmada, denizsuyunda ve tatlısuda ağ kafeslerde yetiştirilen gökkuşağı alabalığı (Oncorhynchus mykiss W., 1792)’ nın gelişme farklılıkları incelenmiştir. Deneme; tatlısu ve denizde, 2 tekerrürlü olarak yürütülmüştür. Çalışma; her iki ortamda da ağ kafeslerde gerçekleştirilmiştir. Ortalama ağırlıkları; gölde 102.95 ± 0.45 g ve denizde 102.61 ± 0.49 g olan gökkuşağı alabalıkları, canlı ağırlıklarının %1.5’i ile %2’si oranında 90 gün süreyle yemlenmişlerdir. Deneme sonunda ortalama, gölde 303.77 ± 2.93 g, denizde 370.89 ± 4.10 g canlı ağırlıklar eldeedilmiş olup tatlısu ve deniz suyu değerleri arasındaki fark istatistiksel olarak önemli bulunmuştur (P<0.05). Spesifik büyüme oranları gölde %1.21 ve denizde %1.46, yem değerlendirme oranı değerleri sırasıyla, 1.29 ve 1.12, kondüsyon faktörü değerleri ise sırasıyla, 1.23 ve 1.22 olarak belirlenmiştir.Öğe Determination of Water Quality of Arılı Stream (Rize) in Terms of Physico-Chemical Structure(2016) Öz, Ünal; Ertaş, Ethemand Ertaş 31(1): 30-39 (2016)doi: 10.18864/TJAS201604Öğe Effect of Bentonite's Different Rates to Ammonium Removal in Aquatic Conditions(Tokat Gaziosmanpasa University, 2018) Sahin, Dilek; Sertasi, Eda; Öz, Meryem; Öz, Ünal; Karsli, Zafer; Aral, OrhanAmmonia has a high toxic effect for all living forms. When exposed to in low quantities, it can be tolareted by the living forms. Compared with clay minerals, bentonite has a high usability due to its high adsorption capacity and low cost. In this study, it was aimed to determine the effects of two different amount of bentonite on the ammonium adsorption in freshwater at 17±1°C. In this research two trial groups with 3 repetitions were created for two different bentonite rate. Experimental groups were prepared by adding 2 liter of water and NH4Cl to each bottle to give an NH4+ amount of 10 mg/l. After that, two amounts of bentonite (7 g/l, 14 g/l) were added to the bottles. Water temperature, pH, dissolved oxygen and TAN (Total Ammonium Nitrogen) values were determined during the trial period. At the end of trial NH3 values were calculated as 0.461±0.01 mg/l and 0.463±0.01 mg/l in different amount of bentonite groups (7 g/l, 14 g/l), respectively. There were difference in TAN values between the experimental groups (p<0.05). As a result in this study, it has been determined that the amount of 14 g/l bentonite is the ideal amount for ammonium removal in aquaculture.Öğe Effect of Natural Diatomite Different Sizes on Ammonia Adsorption in Aquarium Water(2023) Şahin, Dilek; Öz, Meryem; Öz, ÜnalIn this study, it was aimed to examine the effects of four different sizes of diatomite on the retention of ammonium in water. The trial was planned into 5 groups of 3 replicated without fish and aeration. In the plastic aquariums where the trial was conducted, 500 ml of tap water, 0.5 g (47.5% crude protein, 6.5% crude oil, 2% cellulose, 6% moisture) and 3 g of diatomites of different sizes (excluding the control group) were placed in each replicate.When the mean water parameter values at the end of the trial were examined, there was no statistical difference in water temperature, dissolved oxygen and pH values (P>0.05). However, in NH4 and TAN values, it was found that the statistically determined difference between the groups was significant (P<0.05). When the ammonium values were compared between the diatomite groups and the control group, it was found that 25.27%, 28.62%, 31.82% and 34.45% lower in D1, D2, D3 and D4 groups, respectively.. As a result, diatomites of different sizes; It has been established that it does not have a negative effect on important water parameters such as pH and dissolved oxygen. According the results of this study, in which the effects of four different sizes of diatomite on water parameters were investigated, show that it can contribute positively to keeping ammonia values, which is extremely important especially for fish farming, at lower values.Öğe Growth Performance and Feed Utilization of Koi Carp (Cyprinus carpio L., 1758) Fed Partial or Total Replacement of Fish Meal with Hazelnut Meal and Soybean Meal(Journal of Animal and Veterinary Advanses, 2011) Yeşilayer, Nihat; Öz, Meryem; Karslı, Zafer; Aral, Orhan; Karaçuha, Ali; Öz, ÜnalThe effects of soybean and hazelnut meals as partial and total replacements of fish meal were studied on the growth performance and feed utilization of Koi carp juvenile (Cyprinus carpio L., 1758). Juvenile fish (mean initial weights 0.12 g) were fed five isonitrogenously (350 g kg?1) and isocalorically (4.20 kcal g?1) diets with 50 or 100% of the fish meal protein replaced by soybean and hazelnuts protein. The control diet contained fish meal as major protein source. A total of 225 juvenile koi were randomly assigned to each treatment which was replicated three times with 15 fish each. The fish were fed with these diets for 65 days. The results showed that Final Body Weight (FBW), Relative Growth Rate (RGR) and Protein Efficiency Rate (PER) were not significantly different among groups. Fish fed control, 50% SM, 50% HM and 100% SM diets had similar Specific Growth Rate (SGW) values while fish fed the 100% HM diet had lower SGR values than those of other diets (p<0.05). The FCR values of fish fed 50% SM and 50% HM diets were significantly different than that of 100% HM (p<0.05). The highest FCR was obtained from 50% HM diet. The results indicated that koi carp juvenile can be cultivated with feeding diets containing 50% SM, 100% SM and 50% HM without any adverse effect on growth performance of fish.Öğe Investigation of Ammonium Saturation and Desorption Conditions of Clinoptilolite Type Zeolite in Aquarium Conditions(2017) Öz, Meryem; Şahin, Dilek; Öz, Ünal; Karslı, Zafer; Aral, Mustafa OrhanBu çalışmada, doğal bir filtrasyon materyali olan klinoptilolit türü zeolitin, akvaryum yaşamının kontrol altında tutulması için zorunlu olan parametrelerden amonyumun adsorpsiyonunu, doygunluğa ulaşmasını ve desorpsiyonunu belirlemek amaçlanmıştır. Akvaryum suyunda başlangıçta Z1: 20 mg/l TAN ve Z2: 40 mg/l TAN olarak belirlenen konsantrasyonların, deneme sonunda Z1'de 10 mg/l TAN ve Z2'de 24 mg/l TAN konsantrasyonlarına kadar adsorplandığı saptanmıştır. Zeolitlerin doygunluğa ulaştığı bu safhadan sonra desorpsiyon sistemi düzenlenerek 5 litrelik akvaryumlarda 3 tekerrürlü 2 grup oluşturulmuştur. Beş günlük araştırma süresince her gün aynı saatte (10.00) su parametreleri belirlenmiştir. Denemenin başlangıcında Z1 ve Z2 gruplarında 0,4 ± 0,00 mg/l TAN ortalama değerleri, deneme sonunda Z1 ve Z2 gruplarında TAN değerleri sırasıyla 1,55 ± 0,176 mg/l (%15,5) ve 2,153 ± 0,27 mg/l (%13,5) olarak tespit edilmiştir. Bu çalışmada elde edilen veriler değerlendirildiğinde, zeolitin doygunluğa ulaştığı zaman, tutulan amonyum miktarı ile orantılı olarak desorpsiyon yaptığı tespit edilmiştir. Yoğun akuakültür sistemleri veya akvaryum koşullarında, bu veriler dikkate alınarak, belirli sürelerde zeolitin yeniden aktifleştirilmesi önerilmektedir.Öğe Su Ürünleri Yetiştiriciliğinde Sera Sisteminin Kullanımı(Yunus Araştırma Bülteni, 2012) Öz, Ünal[Abstract Not Available]Öğe Suların, Su Taşıma ve Depolama Yapıları Üzerindeki Etkileri ve Alınması Gerekli Önlemler(Su Ürünleri Mühendisleri Derneği, 2006) Öz, Ünal; Öz, MeryemSu ürünleri yetiştiriciliğinde en çok kullanılan malzemelerden biri olan betonun, ortam şartlarının kimyasal ve biyolojik etkilerine karşı dayanıklı olması "servis ömrü" olarak da tanımladığımız dayanıklılık özelliğini artırması bakımından önemlidir. Bu makalede, bu etkilerin neler olduğu incelenmiş ve alınması gerekli önlemler belirtilmiştir.
