Mannanoligosaccharides in Fish Nutrition: Effects of Dietary Supplementation on Growth and Gastrointestinal Villi Structure in Gulf of Mexico Sturgeon

Abstract

Although low levels of dietary mannanoligosaccharide (MOS) supplementation have been shown to increase weight gain, decrease feed conversion, and stimulate intestinal villi growth in domestic mammals and birds, the responses of aquacultural species to MOS have not been studied. We examined the effects of MOS supplementation on the growth of and digestive tract morphology in Gulf sturgeon Acipenser oxyrinchus desotoi. There were no differences in growth performance (as measured by condition factors, specific growth rates for weight and fork length, and feed conversion ratios), gross gastrointestinal morphology (gut length and spiral valve length), or spiral valve villi structure (villus length, width, and density) between fish fed control and MOS‐supplemented diets. However, in light of the promising results obtained by similar studies across a wide range of animals, dietary MOS supplementation in other aquacultural species merits further investigation.

Effects of Mannan Oligosaccharide and Inulin on Sharpsnout Seabream (Diplodus Puntazzo) in the Context of Partial Fish Meal Substitution by Soybean Meal

“…The lack of growth response to the MOS is in agreement with results from studies on gulf sturgeon (Pryor et al, 2003), hybrid tilapia (Genc et al, 2007a), Atlantic salmon (GrisdaleHelland et al, 2008) and gilthead seabream (Dimitroglou et al, 2010), and in contrast to studies on rainbow trout (Staykov et al, 2007), green tiger prawn (Genc et al, 2007b) and European sea bass (Torrecillas et al, 2007), that showed that MOS could improve growth performance. The lack of growth response to the fructooligosaccharide in the form of inulin is in agreement with results from studies on turbot larvae (Mahious et al, 2006), Atlantic salmon (Refstie et al, 2006;Grisdale-Helland et al, 2008) and juvenile red drum (Buentello et al 2010).…”

Effect of Dietary Prebiotic Mannan Oligosaccharide (MOS) on Growth Performance, Intestinal Microflora, Body Composition, Haematological and Blood Serum Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss) Juveniles

“…Mannan oligosaccharide promotes the growth of beneficial lactic acid bacteria in the intestine and these bacteria help in inhibiting the growth of pathogens by producing bacteriocins (Andrews et al, 2009). Contrary to the present findings, there are some reports of negative effects of dietary mannan oligosaccharide on other fish species such as Gulf sturgeon (Acipenser oxyrinchus desotoi) (Pryor et al, 2003), African catfish (Clarias gariepinus) (Genc et al, 2006), Hybrid tilapia (Oreochromis niloticus×O. aureus) (Genc et al, 2007), Channel catfish, Ictalurus punctatus (Welker et al, 2007), Nile tilapia (Oreochromis niloticus) (Sado et al, 2008), sea bream (Sparus aurata) (Dimitroglou et al, 2010), Kutum (Rutilus frisii kutum) (Akrami et al, 2010) and Giant sturgeon (Huso huso) juvenile (Razeghi et al, 2012).…”

Untitled

“…Dimit roglou et al (2010) found lower CF in groups fed with MOS-added feed than the control. On the contrary, according to Ye, Wang, Li, &Sun, 2011 andPryor, Royes, Chapman, &M iles, 2003 that feeding flounder and sturgeon with MOS-added feed did not show any statistical difference in CF (P˃0.05). In addition, the studies, carried out in black cod (Genç et al, 2006), rainbow trout (Yılmaz et al, 2007) and hybrid tilapia (Genç et al, 2007a) d id not show any statistical difference (P˃0.05) in HSI with MOSaddition to feed.…”