Untitled

Abstract

The effect of replacement of fish meal (FM) with graded level of poultry by-product meal (PBM) in diets on growth performance and fatty acid composition of carp fry (Cyprinus carpio) was examined in the experiment. Five isonitrogenous (34% crude protein), isolipidic (9% crude lipid) and isoenergetic (15.0 MJ/kg DE) experimental diets replacing 0 (control group), 25, 50, 75 and 100% of FM protein by PBM protein were formulated with lysine, methionine and threonine supplementation in order to balance the amino acid profiles of the experimental diets. Each diet was fed to twice daily to apparent satiation of groups of twenty fry (mean weight 0.39 g fish -1) stocked into 65L glass aquaria to maintain three replicates per treatment. At the end of the experiment, body weight gain, specific growth rate, protein efficiency ratio and feed conversion ratio decreased with increased dietary replacement of FM with graded levels of PBM, while condition factor, hepatosomatic indices, viscerosomatic indices and whole body composition did not exhibit significant differences among the experimental groups (P>0.05). There were significant differences in total fatty acid composition of each experimental group. Values of Σn-3 polyunsaturated fatty acids and Σn-3/Σn-6 ratio in the muscle of fish decreased. No significant differences in saturated fatty acids values were observed in fish, while monounsaturated fatty acids values increased as the PBM level increased in the diet. Keywords: Cyprinus carpio, feeding, fishmeal replacement, poultry by-product meal, growth, fatty acids.protein (Hardy, 2010). However, FM is the most expensive and limited availability (Nguyen et al., 2009). Hence, the aquafeed industry has to search for less expensive alternative protein sources to reduce Sazan (Cyprinus carpio) Yavrusunun Büyüme Performansı ve Yağ Asit Kompozisyonu Üzerine Tavuk Kesim Atıkları Ununun Etkisi ÖzetBu çalışmada, aynalı sazan (Cyprinus carpio) yavru yeminde balık unu proteini yerine tavuk kesim atıkları ununun (TKAU) artan seviyelerde kullanımının balıklarda büyüme performansı ve yağ asidi kompozisyonu üzerine etkisi araştırılmıştır. Protein (%34 ham protein), yağ (%9 ham yağ) ve enerji (15,0 MJ/kg SE) değerleri eşit olmak üzere balık unu proteini yerine TKAU proteini %0 (kontrol grubu), %25, %50, %75 ve %100 oranında ilave edilerek beş farklı deneme yemi hazırlanmıştır. Ayrıca hazırlanan yemlerin amino asit içeriklerini dengelemek için lisin, metiyonin ve tironin ilave edilmiştir.Deneme, 65L'lik 15 cam akvaryumun her birinde 20 balık (ortalama ağırlık 0,39 g) olacak şekilde üç tekrarlı olarak planlanmıştır. Deneme grubu balıkları günde iki kez doyuncaya kadar 13 hafta süre ile beslenmiştir. Deneme sonunda, vücut ağırlık kazancı, spesifik büyüme oranı, protein etkinlik oranı ve yem dönüşüm oranı TKAU'nun artan oranlarını içeren yemlerle beslenen balıklarda azalırken, kondüsyon faktörü, hepatosomatik indeks, visserosomatik indeks ve balık eti kimyasal kompozisyonunda önemli bir farklılık görülmemiştir (P>0,05). Deneme grubu b...

Bioprocessed poultry by-product meals on growth, gut health and fatty acid synthesis of juvenile barramundi, Lates calcarifer (Bloch)

“…Both bioprocessed and unprocessed PBM diets had no significant effect in fish muscles moisture, protein, lipid and ash content of juvenile barramundi in the present study. This observation was in agreement with several studies demonstrated no effects of dietary PBM on the whole-body composition of fish [50, 56]. However, Shapawi, Ng [43] who reported that whole-body protein content was significantly lower in humpback grouper fed 100% replacement diet with PBM.…”

The investigation of the effects of different feeding strategies on the growth of dolphin cichlid (Cyrtocara moori Boulenger, 1902) fish

“…Weight gain, specific growth rate, feed intake, feed conversion ratio and survival rate were estimated using standard formulae outlined by Gümüş and Aydın (2013), Sevgili, Hoşsu, Emre, and Kanyılmaz (2013) and Adaklı and Taşbozan (2015):…”