Kapalı devre sistemde tatlı su ve ‰5 tuzlulukta yetiştirilen Avrupa yayın balığının (Silurus glanis L.) büyüme performansının karşılaştırılması

Avrupa yayın balığı (Silurus glanis L.) hızlı büyümesi ve etinin lezzetli olmasından dolayı ekonomik değeri yüksek olan bir balıktır. Bu çalışmada, kapalı devre sistemde, hem tatlı suda hem de ‰5 tuzluluktaki suda yayın balıklarının büyüme performansları araştırılmıştır. Çalışma, ortalama ağırlığı 507±13,02 g ve ortalama total boyu 42,85±0,45 cm olan balıklar kullanılarak, üç ay boyunca tatlı su (Y1, Y2, Y3) ve ‰5 tuzluluktaki artezyen suyunda (T1, T2, T3) olmak üzere üçer tekerrür şeklinde dizayn edilmiştir. Balıklara günde iki öğün ağırlıklarının %3’ü kadar besleme yapılmıştır. Deneme sonucunda ortalama canlı ağırlık artışı, total boy artışı, yem tüketimi miktarı ve oranı, SGR ve FCR oranları Y grubunda daha yüksek bir değer göstermiştir (P0,05). Sonuç olarak, bu türün hem tatlı su hem de ‰5 tuzluluğa sahip sularda yetiştiriciliğinin yapılabileceği kanaatine varılmıştır.

Comparison of growth performance of European catfish (Silurus glanis L) rearing in freshwater and 5 ‰ salinity in recirculating system

European catfish (Silurus glanis L.) is a fish that has a high economic value due to its rapid growth and delicious flesh. In this study, the growth performance of European catfish was investigated in freshwater and 5‰ salinity in recirculating system. The study was carried out using fish with an average weight of 507±13.02 g and an average total length of 42.85±0.45 cm in freshwater (Y1, Y2, Y3) and 5‰ salinity of ground water (T1, T2, T3) designed as three replications for three months. Fish were fed with 3% of the total weight two meals a day. The mean body weight gain, total lenght increase, amount and percentage of feed consumption, specific growth rate (SGR) and feed conversion rate (FCR) were higher in group Y (P0.05). As a result, it is concluded that this species can be reared in both fresh water and 5‰ saline water.

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