Journal ArticleDOI
Effect of a mannan oligosaccharide on the growth performance and immune status of rainbow trout (Oncorhynchus mykiss)
TLDR
These experimental trials demonstrated the ability of MOS to improve the growth performance, survival, and immune status of rainbow trout produced in net cages or raceways.Abstract:
The objective of these experimental trials was to determine the effect of a mannan oligosaccharide (MOS) derived from the outer cell wall of Saccharomyces cerevisiae strain 1026 on the growth performance and immune status of rainbow trout. Two experiments were conducted, one with eight net cages and the other with eight raceways. The net cage experiment (42 days) involved 14,400 fish with an initial average weight of 30 g. The raceway experiment (90 days) was conduced with 40,000 fish with an initial average weight of 101 g. Both experiments compared a commercial extruded diet with and without 2,000 ppm MOS supplementation. The calculated daily feed was supplied in six equal rations. Body weight, feed intake, and mortality were recorded and samples were taken for analysis of indicators of immune status. All data were subjected to ANOVA, with a net cage or raceway regarded as an experimental unit. Significantly improved performance and immune status were observed in the net cage trial—improved weight gain of 13.7% (P < 0.01), reduced feed conversion ratio (FCR) (P < 0.05), reduced mortality (P < 0.01), and improved indicators of immune status (P < 0.01) for fish fed the MOS supplement compared with controls. Similar significantly improved performance was observed for the MOS-treated groups in the raceway trial—9.97% improved weight gain (P < 0.01), lower FCR (P < 0.01), and reduced mortality compared with the control treatment. In the raceway trials, however, only the indicators of immune status lysozyme concentration, APCA, and CPCA were significantly improved by MOS treatment (P < 0.05). These experimental trials demonstrated the ability of MOS to improve the growth performance, survival, and immune status of rainbow trout produced in net cages or raceways.read more
Citations
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Journal ArticleDOI
The current status and future focus of probiotic and prebiotic applications for salmonids
Daniel L. Merrifield,Arkadios Dimitroglou,Andrew D. Foey,Simon J. Davies,R.T.M. Baker,Jarl Bøgwald,Mathieu Castex,Einar Ringø +7 more
TL;DR: The application of probiotics and prebiotics may result in elevated health status, improved disease resistance, growth performance, body composition, reduced malformations and improved gut morphology and microbial balance.
Journal ArticleDOI
Role of gastrointestinal microbiota in fish
TL;DR: The involvement of GI microbiota in fish nutrition, epithelial development, immunity as well as disease outbreak, and the need for manipulating the gut microbiota with useful beneficial microbes through probiotic, prebiotic and synbiotic concepts for better fish health management are indicated.
Journal ArticleDOI
Prebiotics in aquaculture: a review
Einar Ringø,Rolf Erik Olsen,T.Ø. Gifstad,Roy A. Dalmo,Heidi Amlund,Gro Ingunn Hemre,Anne Marie Bakke +6 more
TL;DR: To fully conclude on the effects of adding prebiotics in fish diets, more research efforts are needed to provide the aquaculture industry, the scientific community, the regulatory bodies and the general public with the necessary information and tools.
Journal ArticleDOI
Probiotics and prebiotics associated with aquaculture: A review.
TL;DR: Both probiotics and prebiotics influence the immunomodulatory activity boosting up the health benefits in aquatic animals, and their ability to stimulate systemic and local immunity, deserves attention.
Journal ArticleDOI
Prebiotics as immunostimulants in aquaculture: a review.
TL;DR: The direct effects of prebiotics on the innate immune system of fish are discussed and many studies have indicated that immunosaccharides are beneficial to both finfish and shellfish.
References
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Journal ArticleDOI
Fish stress and health in aquaculture
TL;DR: The present study focuses on the development of a strategy for selective breeding for stress-tolerant fish and its application in the context of finfish rearing and the management of stress.
Journal ArticleDOI
Immune stimulation and improved infection resistance in European sea bass (Dicentrarchus labrax) fed mannan oligosaccharides.
Silvia Torrecillas,A. Makol,Maria Jose Caballero,Daniel Montero,Lidia Robaina,F. Real,John Sweetman,Lluis Tort,M.S. Izquierdo +8 more
TL;DR: A positive correlation was found between the levels of lysozyme and alternative complement pathway activities in blood and the level of inclusion of MOS in diets and growth significantly increased at both MOS dietary inclusion levels.
Journal ArticleDOI
Dietary nucleotides: a novel supplement in fish feeds: 1. Effects on resistance to disease in salmonids
TL;DR: When added to normal fish feed formulations at a combined inclusion level of 0.03%, these additional nucleotides were shown to increase resistance to challenge infections with bacterial, viral and rickettsial diseases as well as ectoparasitic infestation.
Journal ArticleDOI
Immunostimulant effects of nucleotide isolated from yeast RNA on carp, Cyprinus carpio L
TL;DR: Yeast nucleotides appear to enhance non-specific immune responses in fish, and the number of Aeromonas hydrophila in nucleotide-treated fish significantly decreased in the blood, kidney and liver after intraperitoneal injection.