Effects of inulin and fructooligosaccharides on growth performance, body chemical composition and intestinal microbiota of farmed rainbow trout (Oncorhynchus mykiss)

Abstract

The objectives of the present study were to investigate the effects of inulin and fructooligosaccharides (FOS) on growth performance, whole body and fillet chemical composition and intestinal microbiota of rainbow trouts reared under fish farming conditions. Trouts fed inulinor FOS-containing diets (5 and 10 g kg À1 ) exhibited significant (P = 0.030) body weight gain improvements compared with controls. An increase in gross energy (P = 0.044) and Ca content (P = 0.034) in the whole body of trouts was observed for prebiotic treatments. A decrease in crude protein content (P = 0.009) and a tendency to increase total lipid and gross energy contents (P = 0.090 and P = 0.069, respectively) were detected in the fillet tissue for prebiotic treatments. These results clearly indicate that inulin and FOS improved the intestinal absorption of Ca and that the increased amount was predominantly incorporated into bone tissue. Inulin reduced (P = 0.027) the intestinal population of Vibrio spp. in the distal region to such an extent that no viable counts were detected. The presence of Flavobacterium spp. was not detected in any group, and the numbers of Aeromonas spp., Pseudomonas spp. and Gram-positive bacteria were not affected (P > 0.05).

Effects of inulin and Jerusalem artichoke (Helianthus tuberosus) as prebiotic ingredients in the diet of juvenile Nile tilapia (Oreochromis niloticus)

“…The improved growth response observed in the present study was similar to that reported previously in various fish species, including Nile tilapia, Siberian sturgeon (Acipenser baerii), and rainbow trout (Oncorhynchus mykiss) (Mahious et al, 2006a;Ibrahem et al, 2010;Ortiz et al, 2013). However, dietary supplementation with inulin did not affect the growth response in weaning turbot (Psetta maxima), Atlantic salmon (Salmo salar), hybrid striped bass (Morone chrysops x Morone saxatilis) (Mahious et al, 2006b;Bakke-McKellep et al, 2007;Burr et al, 2010), and it had a negative effect on the growth response in beluga (Huso huso) (Reza et al, 2009).…”

“…Instead, they are fermented in the large intestine or colon by beneficial bifidobacteria and other lactic acid producing bacteria, thereby enhancing their relative populations (Pool-Zobel et al, 2002;Roberfroid, 2002;Flickinger et al, 2003). Several dietary grades of inulin are available commercially, and their use as a dietary supplement in animal feed has been shown to enhance growth performance, modulate intestinal microbiota, and improve hematological and immune parameters in fish, poultry, and swine (He et al, 2002;Mahious et al, 2006a;Reza et al, 2009;Ibrahem et al, 2010;Mourino et al, 2012;Nabizadeh, 2012;Ortiz et al, 2013). Nevertheless, the use of inulin as a functional feed additive in the animal feed industry is limited by the cost of the inulin extraction process.…”

Use of food waste as fish feeds: effects of prebiotic fibers (inulin and mannanoligosaccharide) on growth and non-specific immunity of grass carp (Ctenopharyngodon idella)

“…On the other hand, there were no published studies showing improvement in gut morphology with inulin supplementation. As inulin could modulate fish gut bacterial community (Burr et al 2010;Ortiz et al 2013), it could be possible that inulin stimulates fish growth solely by modifying gut bacterial population in intestine of grass carp. Nevertheless, the exact mechanism behind the growth-promoting effect of prebiotic fibers on grass carp is not known and should be a topic of further study as various fish species responded differently to dietary prebiotic fibers.…”

Effects of short-chain fructooligosaccharides (scFOS) and rearing temperature on growth performance and hepatic intermediary metabolism in gilthead sea bream (Sparus aurata) juveniles

“…The effects of prebiotics on growth performance are dependent on aspects such as prebiotic source, fish species and diet composition, which may explain why some studies reported improved fish growth due to dietary FOS incorporation (Mahious et al 2006;Zhou et al 2010;Soleimani et al 2012;Ortiz et al 2013;Wu et al 2013) while others reported no growth improvement (Grisdale-Helland et al 2008;Buentello et al 2010;Ye et al 2011;Hoseinifar et al 2014;Guerreiro et al 2014aGuerreiro et al , 2015b, or even report adverse effects on fish performance (Hoseinifar et al 2011a). In the present study, effect of dietary scFOS supplementation seems to be influenced by temperature.…”

“…Among prebiotics, fructooligosaccharides (FOS) are one of the most tested in fish (Merrifield et al 2010;Ringø et al 2010Ringø et al , 2014Dimitroglou et al 2011;Hoseinifar et al 2014;Zhang et al 2014). However, studies conducted so far in fish have been focused mainly on FOS effects on growth performance, immune response and disease resistance (Grisdale-Helland et al 2008;Buentello et al 2010;Ai et al 2011;Ye et al 2011;Soleimani et al 2012;Ortiz et al 2013;Wu et al 2013;Zhang et al 2013Zhang et al , 2014Hoseinifar et al 2014;Guerreiro et al 2014aGuerreiro et al , b, 2015b. To our knowledge, up to now only two studies aimed to access short-chain fructooligosaccharides (scFOS) effects on fish metabolism (Guerreiro et al 2014a(Guerreiro et al , 2015b.…”