Effect of the application of β-glucans and mannan-oligosaccharides (βG MOS) in an intensive larval rearing system of Paralichthys adspersus (Paralichthydae)

Abstract

For successful rearing of the flounder Paralichthys adspersus, it is important to optimize growth and survival in the early larval stages. Several authors indicate that the application of β-glucans and mannan-oligosaccharides (βG MOS) in rearing water should improve the larval health, diminishing the effects of physiological stress and physical damage that the aquaculture activities cause to the individuals. In order to evaluate the effect of βG MOS on P. adspersus incorporation on P. adspersus larval survival and growth in intensive culture, experiments were carried out with six-days post-hatch larvae, which had only just begun to feed on live prey (rotifers), and fifteen-day post-hatch larvae. Three treatments were used, applying 5 mg•L-1 , 10 mg•L-1 , and 15 mg•L-1 of βG MOS to the rearing water during the first five days of the experiment and then comparing the results with a control. The results indicate that applications of 5 mg•L-1 of βG MOS in the rearing water enhance larval survival and growth with respect to the control, whereas additions of 15 mg•L-1 of βG MOS suppressed both of these parameters. This effect increases for larvae that have recently absorbed the yolk sac. An histological analysis of the intestinal epithelium of the larvae suggests that βG MOS promotes the expression of monocytes (forerunner cells of macrophages) associated with the non-specific immune system of the fish.

Zebrafish as animal model for aquaculture nutrition research

“…In recent years, additives such as prebiotics mannooligosaccharides (MOS) and fructoligosaccharides (FOS), probiotics (bacteria); immunostimulants (β-glucans), and nucleotides have been incorporated into fish diets in order to control diseases, improve health, and the immune status against acute stress ( Piaget et al, 2007 ; Staykov et al, 2007 ; Tahmasebi-Kohyani et al, 2012 ). In the case of MOS, the supplementation of 0.2% into diets with 14% inclusion of soybean meal decreased the intestinal inflammation in Atlantic salmon ( Refstie et al, 2010 ).…”

Effect of hydrolysed fish protein and autolysed yeast as alternative nitrogen sources on gilthead sea bream (Sparus aurata) growth performances and gut morphology

“…Finally, considering the peculiar characteristics of the autolysed yeast, which contain yeast cell wall (typically rich in MOS) in addition to a wide range of amino acids, peptides and nucleotides, and the effect of MOS on the intestinal mucosa described by several studies (Piaget et al 2007;Torrecillas et al 2007;Dimitroglou et al 2010;Torrecillas, Makol, Benitez-Santana et al 2011;Torrecillas, Makol, Cabllero et al 2011;Torrecillas et al 2014), one can speculate that MOS might also play a role in the enhancement of the fish gut traits.…”

“…), immunostimulants (e.g. b-glucans) and nucleotides have also been included in aquafeed (Piaget et al 2007;Staykov et al 2007;Tahmasebi-Kohyani et al 2012;Torrecillas et al 2014;Udayangani et al 2017) to enhance diet digestibility and absorption, fish wellness and gut conditions (Torrecillas, Makol, Benitez-Santana et al 2011;Torrecillas, Makol, Cabllero et al 2011).…”

Effect of dietary supplementation of mannan oligosaccharide on growth performance and salinity tolerance in kutum, Rutilus kutum (Kamensky, 1901) fry

“…MOS also absorb mycotoxins found in feed ingredients commonly used in formulated diets (Pryor et al., ). A number of studies have demonstrated that the administration of MOS can improve the growth performance, stress resistance and gut morphology in several freshwater species (Piaget et al., ; Sado et al., ; Dimitroglou et al., ; Sang et al., ). Rutilus kutum (kutum) is one of the most commercially valuable fish species at the southern coast of the Caspian Sea (Abedi et al., ).…”