Improved feed utilization, intestinal mucus production and immune parameters in sea bass (Dicentrarchus labrax) fed mannan oligosaccharides (MOS)

Abstract

In the present study, the effects of dose dietary administration of mannan oligosaccharides (MOS) (Bio‐Mos; Alltech Inc.) on growth, digestibility, liver morphology, lipid and carbohydrate metabolism enzymes, organoleptic properties, immune parameters and gastrointestinal tract mucus production were assessed. MOS dietary inclusion significantly reduced lipogenic enzymes activity in liver and resulted in a lower lipid vacuolization and more regular‐shaped morphology of hepatocytes around the sinusoidal spaces, which could be associated to a better energy and feed utilization because of the improvement of feed utilization and the reduction of feed intake found in the current experiment. Moreover, MOS inclusion enhanced phagocytic activity of head kidney leukocytes in fish fed 4 and 6 g kg−1 MOS diets at days 30, 45 and 60. Gut quantitative morphological analyses showed a marked dose‐dependent enhancement in the number of cells secreting acid mucins by unit of area which could be related to the previous improvement in resistance to bacterial infection. No effects on sensorial parameters and biochemical composition of flesh were detected.

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“…The current study confirmed resuls reported by Dimitroglou et al (2010). In the study by Dimitroglou et al (2010) dietary MOS inclusion did not affect SGR, FCR and PER in sea bream, while another study showed that 4‰ and 6‰ Bio-Mos addition to feed reduced the FCR (Torrecillas et al, 2011). Moreover, 2‰ MOS addition to rainbow trout feed reduced the FCR (Staykov et al, 2007).…”

“…In addition, the positive impact of haematological parameters of M OS has been tested on European bass, Dicentrachus labrax (Torrecillas et al, 2011) (Welker, Lim, Yildirim-A ksoy, & Klesius, 2011).…”

Dietary supplementation with mannan oligosaccharide influences growth, digestive enzymes, gut morphology, and microbiota in juvenile striped catfish, Pangasianodon hypophthalmus

“…MOS is derived from the cell walls of the yeast Saccharomyces cerevisiae and is used as a dietary supplement in poultry husbandry and aquaculture (Wu et al 2014), because of its ability to improve survival and the gut microfloral environment, and for its immune showing villus length, villus width, villus crypt junctions, and crypt depths after 12-week feeding with various MOS-supplemented diets modulation functions (Zhou and Li 2004;Staykov et al 2007;Torrecillas et al 2007Torrecillas et al , 2011Salze et al 2008;Sang and Fotedar 2010). The current research is the first attempt to demonstrate the effectiveness of MOS on the enhancement of growth and survival of juvenile striped catfish.…”

Effect of nutrition and Enteromyxum leei infection on gilthead sea bream Sparus aurata intestinal carbohydrate distribution

“…However, there is almost no information on the specific effect of diet composition on mucin pattern in the intestine of fish, and most studies are focused on the effects on intestine morphometry (Escaffre et al 2007), intestinal fatty acid uptake (Geurden et al 2009) and digestive enzymes (Santigosa et al 2008, Silva et al 2010). The only remarkable findings are the increased number of cells secreting acidic mucins, associated with reduced gut bacterial translocation and improved resistance to Vibrio alginolyticus in European sea bass Dicentrarchus labrax fed with mannan oligosaccharides (MOS) (Torrecillas et al 2007(Torrecillas et al , 2011a. In other animal models, feeding an enzyme-supplemented diet led to changes in the mucin composition and carbohydrate expression of GC glycoconjugates, which were associated with a reduction in intestinal viscosity and decreased numbers of the bacteria Campylobacter jejuni in chicks (Fernández et al 2000).…”