Incorporation of Whole Lupin,Lupinus albus,Seed Meal in Commercial Extruded Diets for Rainbow Trout,Oncorhynchus mykiss: Effect on Growth Performance,Nutrient Digestibility,and Muscle Fatty Acid Composition |
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| Authors: | Aliro S Bórquez Adrián J Hernández Patricio Dantagnan Patricio Saez Edison Serrano |
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| Institution: | 1. Grupo de Nutrición Acuícola, Núcleo de Producción Alimentaria/Escuela de Acuicultura, Facultad de Recursos Naturales, Universidad Católica de Temuco, PO Box 15‐D, Temuco, Chile;2. Fish Nutrition Research Laboratory, Department of Animal and Poultry Science, University of Guelph, Guelph, Canada;3. Department of Animal and Aquaculture Sciences, Aquaculture Protein Centre, CoE/Norwegian University of Life Sciences, PO Box 5003, 1432 ?s, Norway |
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| Abstract: | Whole lupin seed meal was evaluated as partial replacement for fishmeal in extruded diets for rainbow trout, with particular emphasis on the effect on growth performance and apparent digestibility coefficient (ADC) of protein, lipids, carbohydrates, and energy. Effect on muscle fatty acid composition was also evaluated. All diets were formulated to be isonitrogenous and isoenergetic and to contain approximately 45% crude protein and 5.5 kcal energy g/diet. Diets were formulated to include whole lupin seed meal at 0, 10, 15, and 20%. Triplicate groups of fish weighing 65.9 ± 15.1 g on average were fed twice a day until apparent satiation during 12 wk. Growth, feed intake, hepatosomatic index, hepatic histology, proximate composition of whole body, and muscular fatty acid profile were determined. Growth and feed utilization were similar in all treatments and whole‐body composition did not vary among treatments. Polyunsaturated fatty acids of the n‐6 and n‐3 series remained constant in muscle as the amount of lupin in diets increased. Furthermore, the ADCs were similar among all diets. These results suggest that inclusion of whole lupin seed meal up to 20% in extruded diets for rainbow trout do not have any negative effect on growth, feed performance, or flesh quality. |
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