Kürşat BAYRAKTAR, ABDULKADİR BAYIR

4943

The effect of the replacement of fish oil with animal fats on the growth performance, survival and fatty acid profile of rainbow trout Juveniles, oncorhynchus mykiss

Yavru gökkuşağı alabalığı diyetlerinde balık yağının (CO) hayvansal yağlarla tamamen ikame edilip edilemeyeceğini araştırmak için 6 haftalık bir besleme denemesi yürütülmüştür. Bu amaçla CO, kaz yağı, koyun kuyruk yağı ve sığır iç yağı içeren dört diyet formüle edilmiştir. Balıkların deneme sonu vücut ağırlıkları bakımından deneme grupları arasında istatistiksel bir farklılık bulunamamıştır. Çalışma boyunca tüm deneme gruplarında yaşama gücü %100 olarak kaydedilmiştir. Deneme gruplarında yağ kaynağı ile tüm vücut yağ asidi kompozisyonu arasında oldukça önemli ilişkiler belirlenmiştir. Baskın doymuş ve tekli doymamış yağ asitleri sırasıyla 16:0 ve 18:1 n-9 olarak tespit edilmiştir. CO diyeti yüksek seviyelerde toplam n-3 çoklu doymamış yağ asitleri içermiştir, özellikle eikosapentaenoik asid ve dokosaheksaenoik asid. CO diyeti ile beslenen balıkların n-3/n-6 oranı da diğer diyetlerle beslenenlerle karşılaştırıldığında oldukça yüksek bulunmuştur. Sonuç olarak, bu çalışmanın sonuçları balık yağının hayvansal yağlarla tamamen ikamesini yavru gökkuşağı alabalıklarının yağ asidi kompozisyonun besin değerini zayıflattığını göstermiştir.

Yavru gökkuşağı alabalığı oncorhynchus mykiss) yemlerinde balık yağının hayvansal yağlarla ikamesinin büyüme performansı, yaşama oranı ve yağ asidi profili üzerinde etkisi

A six-week feeding trial was conducted to investigate the suitability of animal oils as total replacement for cod liver oil (CO) in rainbow trout juvenile feeds. Four experimental diets were formulated: CO, goose fat, sheep tail fat and beef tallow. The final weights of fish were not significantly different among dietary treatments. Survival rate recorded during the experimental period was 100 % for all treatment groups. Highly significant relationships between oil source and whole body fatty acid composition were determined in all treatment groups. The preliminary saturated fatty acid and monounsaturated fatty acid were 16:0 and 18:1 n-9, respectively. The CO diet contained highest levels of total n-3 polyunsaturated fatty acid, especially eicosapentaenoic acid and docosahexaenoic acid. The n-3/n-6 ratio of in fish fed CO diet was also quite higher compared to that in fish fed the other diets. In conclusion, the results of this study show that total substitution of fish oil with animal fats impairs nutritional value of the fatty acid composition of rainbow trout juveniles.
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Turkish Journal of Fisheries and Aquatic Sciences-Cover
  • ISSN: 1303-2712
  • Yayın Aralığı: 12
  • Başlangıç: 2015
  • Yayıncı: Su Ürünleri Merkez Araştırma Enstitüsü - Trabzon
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