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

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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“…Accordingly, the ADCs in the present study are consistent with those reported by other researchers in juvenile beluga (Khajepour and Hosseini, 2012), Nile tilapia (Gaber, 2006), and European sea bass (Adamidou et al, 2009). This study showed that the digestibility of protein was negatively affected by increasing dietary WFBM levels, which was accordance with those reported by Borquez et al (2011) in rainbow trout. The protein d igestibility values of WFBM for beluga were in the range of 77-80% in the current investigation.…”

Effects of dehulling, steam-cooking and microwave-irradiation on digestive value of white lupin (Lupinus albus) seed meal for rainbow trout (Oncorhynchus mykiss) and Atlantic salmon (Salmo salar)

“…Gross energy (GE) in the samples was estimated assuming a theoretical energetic content of 23.6, 37.7 and 16.7 kJ/g for CP, EE and total carbohydrates (NFE + CF), respectively (Bórquez, Hernández, et al 2011). Phosphorus was determined spectrophotometrically as phosphovanadomolybdate (Djurkin et al 1966).…”

“…The use of white lupin (Lupinus albus L.) seed meal as a feed ingredient in diets for salmonid fish has been previously assessed with variable outcomes (Bórquez, Hernández, et al 2011;Borquez, Serrano, et al 2011;Omnes et al Forthcoming 2015). Studies suggest that the occurrence of anti-nutritional factors in lupin seeds can significantly diminish the nutritive value of this ingredient (Burel et al 2000;Peterson 2000;Farhangi and Carter 2001;Glencross et al 2008;Erbas 2010;Serrano et al 2012).…”

Chemical composition and fatty acid profile of Trans-Andean Shovelnose catfish Sorubim cuspicaudus

“…Fatty acid profile. Lipid content was higher in adults than in larvae, possibly because larvae use lipids to increase in size before storing them, thereby resulting in low lipid and high humidity levels (Bórquez et al, 2011).…”