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

Abstract

This study was conducted to evaluate the effects of mannan oligosaccharide (MOS) dietary supplementation on growth, digestive enzyme activities, gut morphology, and microbiota in striped catfish (Pangasianodon hypophthalmus). Triplicate groups of juvenile striped catfish (initial weight 20.41 ± 1.64 g) were fed twice per day at 2.5 % of body weight for 12 weeks, with 0 (control), 0.2, 0.4, 0.6, or 0.8 % MOS diets. Compared to control (0.74 ± 0.03) and fish fed low MOS concentration, those fed 0.6 % (1.01 ± 0.02) or 0.8 % (1.03 ± 0.03) MOS had significantly higher (P \ 0.05) specific growth rates. Feed conversion ratio and protein efficiency ratio, respectively, significantly improved (P \ 0.05) in fish fed 0.6 % (1.62 ± 0.23; 1.71 ± 0.23) or 0.8 % (1.42 ± 0.06; 1.92 ± 0.08) MOS. Further, compared to control and fish fed 0.2 % MOS, those fed 0.6 % MOS had significantly higher (P \ 0.05) apparent protein and dry matter digestibilities. Amylase, protease, and lipase activities, respectively, were significantly higher (P \ 0.05) in fish fed 0.6 % MOS (5.10 ± 0.97; 0.47 ± 0.08; and 5.59 ± 1.82) than in control (2.60 ± 0.53; 0.32 ± 0.05; and 3.78 ± 0.72). Histological analysis of the anterior and posterior gut showed significantly higher (P \ 0.05) villus length in 0.6 and 0.8 % MOS fed fish than in the control and other treatments. The guts of fish fed different MOS concentrations showed similar total lactic acid bacteria counts, which were significantly higher (P \ 0.05) than those in the control. Thus, 0.6 % MOS-supplemented diet improved growth, feed utilization, digestive enzyme activities, gut morphology, and microbiota in juvenile striped catfish. & Mst. Nahid Akter

Change in the intestinal bacterial community structure associated with environmental microorganisms during the growth of Eriocheir sinensis

“…The physiological state can include the health status of the aquatic organisms, their feeding status, and age. Studies on the health status of aquatic organisms have commonly detected differences in sex and body weight (Li, Yan, Einar, & Wu, ) and in feeds (Akter, Sutriana, Talpur, & Hashim, ; Giannenas, Karamaligas, Margaroni, & Pappas, ; Hao, Wu, Jakovlić, & Zou, ) and feeding methods (Rungrassamee, Klanchui, Maibunkaew, & Chaiyapechara, ; Tzeng, Pao, Chen, & Weng, ; Wang, Zhang, Li, & Lin, ). The differences in the gut microbiota at different ages and the exploration of the core bacteria have been studied frequently for human and model organism intestinal microbes; however, relatively little is known regarding gut bacteria in aquatic organisms.…”

Prebiotics as functional ingredients: focus on Mediterranean fish aquaculture

“…, ,c,d, ,c, ; Akter et al . ), and additional information is still needed, not only on those topics but also on age and size responses, timing and duration of prebiotic administration, among others. In addition, more data on fish intermediary metabolism will allow understanding if prebiotic effects in fish are in accordance with the ones reported in mammals.…”

“…The influence of prebiotics in fish metabolism, influence of temperature in prebiotic effects or prebiotic dosages only recently begun to be studied (Hoseinifar et al 2011a,b;Torrecillas et al 2011b;Guerreiro et al 2014Guerreiro et al , 2015bGuerreiro et al ,c,d, 2016bGuerreiro et al ,c, 2017Akter et al 2016), and additional information is still needed, not only on those topics but also on age and size responses, timing and duration of prebiotic administration, among others. In addition, more data on fish intermediary metabolism will allow understanding if prebiotic effects in fish are in accordance with the ones reported in mammals.…”

Dietary synbiotics improved the growth, feed utilization and intestinal structure of largemouth bass (Micropterus salmoides) juvenile

“…Compared to the chemical drugs, the more effective and safer way is to enhance the immunity and promote the growth of aquatic animals through nutritional regulation (Patra, 2011). In recent years, many additives have been developed to replace or decrease the use of antibiotics in aquaculture, including acidulant (Browdy, Bharadwaj, Venero, & Nunes, 2012;Sarker, Satoh, & Kiron, 2005;Su et al, 2014), probiotics (Abu-Elala, Marzouk, & Moustafa, 2013;Banerjee & Ray, 2017), prebiotics (Akrami, Iri, Rostami, & Razeghi Mansour, 2013;Akter, Sutriana, Talpur, & Hashim, 2016;Bindels, Delzenne, Cani, & Walter, 2015), enzyme preparation (Kumar et al, 2009;Lin, Mai, & Tan, 2010;Tian, He, Zhou, Wang, & Mao, 2017), immunopotentiator (Li, Lai, Li, Gong, & Wang, 2016;Liang, Li, Hou, Qiu, & Zhou, 2015;Lu et al, 2016) and plant extracts (Harikrishnan, Balasundaram, & Heo, 2012;Mohamad & Abasali, 2010;Takaoka et al, 2011).…”