Ticari Yetiştiricilik Ortamında Gökkuşağı Alabalığı (Oncorhynchus mykiss) Yemine İlave Edilen Karayemiş Yaprağı (Laurocerasus officinalis) Ekstraktının Büyüme, Yaşama Oranı ve Karaciğer Katalaz Enzim Aktivitesi Üzerine Etkisi

Öz

Bu çalışmada, yüksek su sıcaklığının ekonomik kayba neden olduğu yaz döneminde, antioksidan özelliği bilinen karayemiş yaprağı (Laurocerasus officinalis) ekstraktının, ticari işletme koşullarında yemde kullanımının, gökkuşağı alabalığının (Oncorhynchus mykiss) yaşama oranı, büyüme parametreleri, biyokimyasal özellikleri ve katalaz (CAT) enzim aktivitesi üzerine etkileri incelenmiştir. Bu amaçla, biri ön deneme olmak üzere iki deneme yürütülmüştür. Ön denemede yeme çeşitli konsantrasyonlarda (0, 1, 2.5, 5, 10 ve 15 g ekstrakt/kg yem) katılan karayemiş yaprağı ekstraktının, akvaryum koşullarında yüksek sıcaklıkta (21°C) gökkuşağı alabalığının yaşama oranına etkisi araştırılmış ve en uygun konsantrasyonun 10 g ekstrakt/kg yem olduğu belirlenmiştir. Ticari yetiştiricilik ortamında yürütülen diğer denemede ise, elde edilebilirliğinin kolaylığı ve yemlerin elle hazırlanmasından dolayı daha makul olduğu düşünülen miktarda (5 g/kg yem) yeme katılan karayemiş ekstraktının gökkuşağı alabalığının yaşama oranı, büyüme parametreleri, biyokimyasal özellikleri ve karaciğerde CAT enzim aktivitesine olan etkileri incelenmiştir. Ancak bu konsantrasyonda yeme ilave edilen karayemiş yaprağı ekstraktının nem ve ham yağ hariç(p<0.05)  incelenen parametreler üzerine istatistiksel olarak önemli bir etkisi olmadığı tespit edilmesine rağmen (p>0.05), deneme grubunda yaşama oranının kontrol grubuna göre daha yüksek olduğu belirlenmiştir. Sonuç olarak ekonomik ve kolay bulunan bir bitki olan karayemişin, gökkuşağı alabalığı yetiştiriciliğinde yaz aylarındaki sıcaklık artışı süresince yeme ilave edilmesiyle yaşama oranını artıran yeni bir antioksidan madde olma potansiyeline sahip olduğu söylenebilir.

Anahtar Kelimeler

• Karayemiş,Gökkuşağı alabalığı,yaşama oranı,büyüme,antioksidan enzim

The effect of cherry laurel (Laurocerasus officinalis) leaf extract on the survival, growth ratio and catalase enzyme activity in liver of rainbow trout (Oncorhynchus mykiss) reared in commercial production conditions

Öz

In this study, the effects of using cherry laurel (Laurocerasus officinalis) leaf extract, which has known antioxidant feature, in diet in commercial production conditions on the survival rate, growth parameters, biochemical composition and catalase enzyme activity in liver of rainbow trout (Oncorhynchus mykiss) during the summer season causing economic loss since high water temperature were investigated. For this purpose, two studies, one of which was a preliminary study, were conducted. In the preliminary study, the effect of cherry leaf extract supplementation to the diet with different concentrations (0, 1, 2.5, 5, 10 and 15 g extract / kg feed) on the survival rate of rainbow trout at high temperature (21 ° C) in aquarium conditions was examined and the most appropriate concentration was determined as 10 g extract / kg feed. In the other study carried out in a commercial company, the effect of cherry leaf extract supplementation into the diet with a more reasonable concentration (5 g extract / kg feed) because of easily obtainable and manual preparation of the diets on the survival rate, growth parameters, biochemical composition and CAT enzyme activity in the liver of rainbow trout were searched. It was determined that cherry leaf extract supplementation to the diet with this concentration did not have any statistically significant effect on the parameters examined (p> 0.05), except for moisture and crude lipid (p<0.05), on the other hand survival rate in the experimental group was higher than the control group. As a result, it can be said that cherry laurel which is economic and easily obtainable plant has a potential as a new antioxidant substance that increases the survival rate in rainbow trout cultivation by supplementing to the diet during the temperature rise in summer months.

Anahtar Kelimeler

• Cherry laurel,rainbow trout,survival,growth,antioxidant enzyme

Kaynakça

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