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Asian-Australas J Anim Sci > Volume 16(9); 2003 > Article
Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2003;16(9): 1355-1359.
DOI: https://doi.org/10.5713/ajas.2003.1355    Published online January 1, 2003.
Effects of Replacement of Fish Meal with Poultry By-product Meals on Apparent Digestibility, Body Composition and Protein Efficiency Ratio in a Practical Diets for Rainbow Trout, Onchorynchus mykiss
M. Mustafa Erturk, Huseyin Sevgili
Abstract
This study examined the replacement of the fish meal (FM) with commercial poultry by-product meal (PBM) in practical diets for rainbow trout (Onchorynchus mykiss, Walbaum). Five isocaloric and isonitrogenous diets containing levels 0 (control), 10, 20, 30 and 40% of PBM as a replacement for FM were fed to three replicate groups of rainbow trout with a initial weight 34.50 0.43 g (mean횞SE). Protein efficiency ratio (PER) of diets containing PBM up to 20% were similar to the control while significantly lower values were obtained from the groups receiving higher levels of PBM (p<0.05). Apparent protein digestibility coefficients (ADCs) were significantly lower than that of the control group when PBM was included at level of 20% or more. Similarly, significantly lower values were observed with diets containing 30 and 40% PBM in terms of dry matter, organic matter, ether extract, ash and energy digestibility (p<0.05). Dietary treatments did not significantly affect the body composition of the fish in terms of dry matter, crude protein, ether extract and ash. In conclusion, PBM in a proportion of 20% may replace about 40 % of FM in rainbow trout diet without significant impairment grow.
Keywords: Rainbow Trout; Poultry By-product Meal; Protein Efficiency Ratio; Apparent Digestibility; Body Composition
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