Effects of dietary mannan oligosaccharides in early weaning diets on growth, survival, fatty acid composition and gut morphology of gilthead sea bream (Sparus aurata, L.) larvae

Abstract

Effects of dietary mannan oligosaccharides in earlyweaning diets on growth, survival, fatty acid composition and gut morphology of gilthead sea bream (Sparus aurata, L.) larvae Abstract Early weaning of marine fish larvae with dry diets delays gut maturation and reduces growth rates. In juvenile and adult forms of several marine fish species, inclusion of dietary mannan oligosaccharides (MOS) improves gut integrity and functionality, but the effects of MOS inclusion in gilthead sea bream (Sparus aurata, L.) larval diets have not been addressed yet. Thus, this study assesses the effects of dietary MOS inclusion on survival, growth performance, gut morphology, feed acceptance and quality of gilthead sea bream larvae. For that purpose, 16 days post-hatched gilthead sea bream larvae were fed four graded levels of MOS (Biomos â , Alltech, Nicholasville, KY, USA) in weaning diets as follows: 0 g kg À1 MOS, 0.5 g kg À1 MOS, 1.5 g kg À1 MOS and 2 g kg À1 MOS. Dietary MOS did not affect feed acceptance in gilthead sea bream larvae (P > 0.05). MOS supplementation was correlated in a dose-dependent way with higher larval survival (P = 0.026). After 15 days of feeding, dietary MOS increased whole larvae (P < 0.01) arachidonic acid, eicosapentaenoic acid and docosahexaenoic acid. Gilthead sea bream larvae fed 2 g kg À1 MOS presented higher gut occupation with goblet cells after feeding compared with larvae fed the other dietary treatments. Overall, the results suggest that inclusion of MOS in early weaning diets for gilthead sea bream improves essential fatty acid utilization and may promote growth and final survival.

Influence of dietary mannan oligosaccharides supplementation on fingerling clownfish, Amphiprion ocellaris (Cuvier, 1830)

“…Growth and survival of fingerling fish were improved when fed diets with 0.10%-0.15% MOS inclusion. This was in agreement with other studies that reported the important role of MOS on boosting growth and survival of aquatic species [4,10,[18][19][20]. In contrast, dietary MOS supplementation did not improve growth in sturgeon, Acipenser oxyrinchus desotoi [21] or in common carp, Cyprinus carpio [22].…”

“…Prebiotic inclusion in the diet significantly improved protein utilization in striped catfish, Pangasianodon hypophthalmus [19]. Similar inclusion of MOS in the diet enhances utilization of essential fatty acid in gilthead sea bream, Sparus aurata [10]. Similarly, the feed conversion ratio and protein efficiency ratio were significantly higher in Macrobrachium rosenbergii fed Agrimos [24].…”

“…Previous research showed prebiotics can boost growth of many aquaculture species [4][5][6][7][8][9][10], boost non-specific immune and pathogen resistance [11] and improve intestinal function and health [4,10,12]. MOS is used commonly in fish and crustacean diet.…”

Combined effects of dietary mannan oligosaccharides and total fish oil substitution by soybean oil on European sea bass (Dicentrarchus labrax) juvenile diets

“…) and ∑n‐3 PUFA in fish tissues (Eryalçin et al . ) and to reduce levels of triglycerides (TAG) on total membrane neutral lipids (Gallaher et al . ; Torrecillas et al .…”

The effect of feeding a novel multistrain yeast fraction on European seabass (Dicentrachus labrax) intestinal health and growth performance

“…Many reports have concluded that the dietary inclusion of MOS can positively influence the health and performance of poultry, swine, and fish (Carbone & Faggio, 2016;Ferket, Parks, & Grimes, 2002;Kogan & Kocher, 2007;Torrecillas, Montero, & Izquierdo, 2014). Several recent reports have demonstrated the effectiveness of MOS in enhancing the health and growth performance of fish, including juvenile striped catfish, Pangasiandon hypophthalmus (Akter, Sutriana, Talpur, & Hashim, 2016) and rainbow trout, Oncorhynchus mykiss (Mínguez, Webster, & Villa, 2016); improving the gut morphology of starry flounder, Platichthys stellatus (Schmidt et al, 2017) and gilthead seabream, Sparus aurata (Eryalçin et al, 2017); and modulating the skin mucous barrier of Atlantic salmon, Salmo salar (Micallef et al, 2017). Although these studies are not directly comparable in terms of dietary regimes, rearing conditions, MOS products, and doses, it is likely that the molecular structure of MOS plays a significant role in the functional effects on the host's intestinal barrier response and physiology (Schiavone et al, 2014).…”