The Effects of Diets containing Hazelnut Meal Supplemented with Synthetic Lysine and Methionine on Development of Rainbow Trout, Oncorhynchus mykiss
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Tarih
2015
Yazarlar
Dergi Başlığı
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Cilt Başlığı
Yayıncı
Erişim Hakkı
Özet
Araştırmada, balık ununa dayalı kontrol yemi ile artan oranlarda sırasıyla %10, %20, %30, %40 ve %50 oranlarında fındık küspesi içeren, izonitrojenik ve izokalorik altı farklı araştırma yemi hazırlanmıştır. Araştırma yemlerinin metiyonin ve lizin içeriklerini mümkün olduğunca dengelemek amacıyla kontrol yeminin lizin ve metiyonin içeriği esas alınarak, kontrol yemi dışındaki araştırma yemlerinin yapısına sentetik lizin ve metiyonin ilave edilmiştir. Ortalama canlı ağırlıkları 114.160.03 g olan gökkuşağı alabalıkları, her grup için 3 tekerrür olacak şekilde stoklanmış ve hazırlanan araştırma yemleriyle 60 gün boyunca günde iki kez doyuncaya kadar yemlenmişlerdir. Araştırma sonunda, spesifik büyüme oranı, oransal büyüme oranı, yem değerlendirme sayısı, protein değerlendirme randımanı ve prodüktif protein değeri bakımından gruplar arasında istatistiksel olarak önemli bir fark bulunamamış ancak en iyi değerler %40 fındık küspesi içeren gruptan elde edilmiştir (P0.05). Protein sindirim oranının yemdeki fındık küspesi oranından etkilenmediği, toplam sindirim ve yağ sindirim oranının ise yemdeki fındık küspesi oranının %50ye çıkmasıyla önemli derecede azaldığı belirlenmiştir (P0.05). Bu araştırma; fındık küspesinin sentetik lizin ve metiyonin ilavesiyle, gökkuşağı alabalığı yeminde %40 oranında kullanılabileceğini göstermiştir.
In the research, the effects of diets, including hazelnut meal supplemented with synthetic lysine and methionine, on development of rainbow trout were investigated. Six isonitrogenous and isocaloric diets were prepared. One of them was a fish meal based on control diet and the others were diets containing hazelnut meal (HM) with the increasing percentages as follows: 10, 20, 30, 40 and 50%. In order to balance lysine and methionine of the diets as much as possible, synthetic lysine and methionine were added to each diet except the control diet which was based on the lysine and methionine content of the control diet. Rainbow trouts (114.16±0.03 g) were stocked in three replications for each group and fed with test diets twice a day until apparent satiation during 60 days. There were no significant differences among groups in terms of specific growth rate, feed conversion ratio, protein efficiency ratio and productive protein value. However, the best values were obtained from 40% HM group (P&#707;0.05). The results showed that the protein digestibility was not affected from the HM ratio in the diet. Nevertheless, the total digestibility and lipid digestibility were decreased with respect to the increase of HM ratio in the diet to 50% (P<0.05). In conclusion, this research has shown that the HM supplemented with synthetic lysine and methionine could be best used at the rate of 40 % in rainbow trout diets.
In the research, the effects of diets, including hazelnut meal supplemented with synthetic lysine and methionine, on development of rainbow trout were investigated. Six isonitrogenous and isocaloric diets were prepared. One of them was a fish meal based on control diet and the others were diets containing hazelnut meal (HM) with the increasing percentages as follows: 10, 20, 30, 40 and 50%. In order to balance lysine and methionine of the diets as much as possible, synthetic lysine and methionine were added to each diet except the control diet which was based on the lysine and methionine content of the control diet. Rainbow trouts (114.16±0.03 g) were stocked in three replications for each group and fed with test diets twice a day until apparent satiation during 60 days. There were no significant differences among groups in terms of specific growth rate, feed conversion ratio, protein efficiency ratio and productive protein value. However, the best values were obtained from 40% HM group (P&#707;0.05). The results showed that the protein digestibility was not affected from the HM ratio in the diet. Nevertheless, the total digestibility and lipid digestibility were decreased with respect to the increase of HM ratio in the diet to 50% (P<0.05). In conclusion, this research has shown that the HM supplemented with synthetic lysine and methionine could be best used at the rate of 40 % in rainbow trout diets.
Açıklama
Anahtar Kelimeler
Balıkçılık, Zooloji
Kaynak
Turkish Journal of Fisheries and Aquatic Sciences
WoS Q Değeri
Q3
Scopus Q Değeri
Cilt
15
Sayı
1
