Effect of a prebiotic supplementation of mannan oligosaccharide on growth traits and mortality of rainbow trout (Oncorhynchus mykiss)

Abstract:

Use of prebiotics, as dietary supplements, could be beneficial in animal health by improving the non-specific immune system. The objective of this study was to investigate the effect of a diet supplementation of mannan oligosaccharide (MOS) from Saccharomyces cerevisiae strain 1026 on mortality and growth traits of rainbow trout (Oncorhynchus mykiss). The experiment was conducted at "Reina del Cisne" fish farm (Cuenca, Ecuador), from October the 7th, 2015 to December the 9th, 2015 (10 weeks). This study involved 30,000 fish allocated in six raceways (5,000 fishes per raceway) with an initial average weight of 170.3±9.7 g. The control treatment group consisted of a standard commercial diet (three raceways), and the MOS treatment group consisted of the control diet supplemented with 0.2% of MOS (three raceways). Growth traits (net body weight [NBW], feed conversion ratio [FCR], and total fish production [TFP]) and mortality were measured. At the end of the fattening period, there were significant differences for NBW, FCR and TFP in favour of the MOS treatment group (p-value <0.05). The mortality observed was 31% and 17% for the control treatment group and the MOS treatment group respectively. The difference between these two groups was statistically significant (p-values <0.05). This study demonstrated that a dietary supplementation of mannan oligosaccharide (MOS) could improve the growth performance and reduce the mortality in rainbow trout (Oncorhynchus mykiss) reared in raceways.

Año de publicación:

2016

Keywords:

• Feed utilization
• Fish production
• Dietary supplement
• Saccharomyces Cerevisiae
• Growth performance

Fuente:

scopus