ILGIN ÖZŞAHİNOĞLU, ORHAN TUFAN EROLDOĞAN, Pınar MUMOĞULLARINDA, Suat Dikel, KENAN ENGİN, H. Asuman YILMAZ, MURAT ARSLAN, A. Nejdet SİRKECİOĞLU

Partial replacement of fish oil with vegetable oils in diets for european seabass (dicentrarchus labrax): Effects on growth performance and fatty acids profile

Bu çalışma alternatif yağ kaynaklarının; levrek bireylerinde büyüme, vücut kompozisyonu ve yem değerlendirmesi üzerine etkilerini belirlemek üzere yapılmıştır. Denemede kullanılan yağlar susam yağı, kanola yağı ve soya yağı. Denemede kullanılan tüm yağlar, %50sini balık yağının oluşturduğu diyetlere %50 oranında dahil edilmiştir ve %100 balık yağından oluşan bir diyetle karşılaştırılmıştır. Diyetlerin Spesifik Büyüme o ranı üzerinde hiçbir etkisi olmamıştır. Kanola yağı ve soya yağı ile beslenen balıklarla karşılaştırılınca, en yüksek final ağırlığı susam yağı ve balık yağı diyetleriyle beslenen balıklarda görülmüştür (P0 ,05). n -6 yağ asitlerinde, diğer diyetlere oranla soya yağı diyetinin önemli miktarda linoleik asit (LA, 18:2n -6) içerdiği gözlenmiştir.Diyet grupları arasında Eicosapentaenoic acid (EPA, 20:5n -3) ve docosahexaenoic acid (DHA, 22:6n -3)nın depolandığı belirlenmiştir. Sonuç olarak, Avrupa deniz levreği diyetlerinde balık yağına alternatif, 585 mg/g balık unu içeren susam yağı kullanılabilir.

Balık yağ yerine kısmı bitkisel yağlar ın Avrupa deniz levreği (dicentrarchus labrax) nin beslenmesine büyüme performansı ve yağ asitleri profili üzerine etkileri

The study was conducted to determine the effects of alternative oil sources on growth, body composition and feed conversion of sea bass individuals. The tested oils used in the study were as follows: sesame oil (SO), canola oil (CO) and soybean oil (SBO). All tested oils were included at a 50% substitution level of fish oil and were compared with a control diet containing 100% fish oil (FO). There was no effect of diet on specific growth rate. The highest final weight was seen in fish fed SO and FO diets co mpared to that of fish fed CO diet and SBO diets (P<0.05). At the end of the experiment, no statistically significant difference was detected determined in whole body fatty acid composition in terms of saturated fatty acids (SFA) and polyunsaturated fatty acids (PUFA) contents (P>0.05). In the n -6 fatty acids, fish fed SBO diet contained significant amount of linoleic acids (LA, 18:2n -6) compared to that of fish other dietary treatments diets . Deposition of eicosapentaenoic acid (EPA, 20:5n -3) and docosahexaenoic acid (DHA, 22:6n -3) was identical among the dietary treatments. In conclusion, the result of the trial show that sesame oil could be used as an alternative to fish oil in European sea bass diet formulation while when fish meal content of the diet is kept relatively high as it was the case our present in this study (585 mg/g)

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