Partial substitution of fish meal with soybean protein concentrate and extracted rapeseed meal in the diet of sterlet (Acipenser ruthenus)

Abstract

Studies were carried out on the possibility of replacing fish meal in the feeds for sterlet (initial body mass 15.9±1.73g) with protein sources of plant origin (concentrate of soybean protein, extracted rapeseed meal). Experimental feeds (40% of crude protein, GE -19 MJ kg -1 ) were prepared by extrusion method. Growth tests (50 days) were carried out in flow-through tanks of 600 dm 3 capacity. During the growth tests, no significant differences were found in biomass gain, specific growth rate (SGR 2.84-3.03 % d -1 ) and feed conversion rate (FCR 1.32-1.41) as well as protein efficiency rate (PER 1.78-1.90). Sterlets obtaining feeds with inclusion of plantoriginating protein were characterized by significantly lower (p<0.05) body contents of dry mass, protein, fat and ash in comparison with fish fed on diets based on animal protein. The studies indicated that feeds for sterlet juveniles, almost one half of the protein required can originate from vegetable components without major loss in conversion efficiency.

Growth performance, body composition, hematological, and serum biochemical responses of beluga (Huso huso) juveniles to different dietary inclusion levels of faba bean (Vicia faba) meal

“…Contrary to our results, the whole-body protein contents decreased with increasing dietary plant protein containing soybean protein concentrates and extracted rapeseed meal in the sterlet (Acipenser ruthenus) (Przyby et al 2006) and Russian sturgeon (Acipenser güeldenstaedtii) juveniles (Sener et al 2006). Also, higher carcass protein values in the gilthead sea bream (Sparus aurata) fed dietary faba bean at low and high inclusion rates (Adamidou et al 2011).…”

Twin-Screw Extrusion Processing of Distillers Dried Grains with Solubles (DDGS)-Based Yellow Perch (Perca flavescens) Feeds

“…Much research has been pursued to find sustainable, cost efficient, and compatible alternatives with high protein availability for fish. In recent years, studies on plant protein sources, such as peas (Carter and Hauler 2000;Schulz et al 2007), lupins (Glencross et al 2006;Farhangi and Carter 2007), rapeseed meal (Przybyl et al 2006;Wu et al 2006), corn gluten meal (Goda et al 2007;Guimarães et al 2008), and cottonseed meal (Mbahinzireki et al 2001;Robinson and Li 2008), have been successful in using these ingredients as partial replacements for fish meal. Based on low palatability, potential presence of anti-nutritional factors, low protein content or imbalances in amino acids in certain plant feedstocks (Carter and Hauler 2000;, high inclusion levels of plant proteins in fish feed are often only achievable with supplementations of essential amino acids (such as methionine and lysine), and preprocessing of the plant materials (Francis et al 2001;Oliva-Teles and Gonçalves 2001).…”

Current status and future perspectives of Italian finfish aquaculture

“…The vitamin C requirement in sturgeon has been a matter of discussion in the literature; nevertheless, a vitamin C supplement is needed, as reported by Papp et al (1999). Sturgeon performance is species-specific and changes with age; for example, juvenile Acipenser rutenus at 18.5-24.5 °C has been reported to show a specific growth rate (SGR) of 2.84-3.03, a FCR of 1.32-1.41, and a protein efficiency ratio (PER) of 1.78-1.90 (Przybył et al 2006).…”