Dietary effect of prebiotic supplementation on fish
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Transcript of Dietary effect of prebiotic supplementation on fish
DIETARY EFFECT OF PREBIOTIC
SUPPLEMENTATION ON FISH
Prebiotics Aquaculture
Introduction
In 1995Concept was introduced By Gibson and Roberfroid.
Criteria to be called as pre-biotic:
Resistant to hydrolysis Fermented by intestinal microbiota. Selectively stimulate growth or activity of
beneficial intestinal bacteria i.e, Lactobacillus species Bifidobacterium species
Prebiotics
Non-digestible food ingredient that beneficially affects the host by selectively stimulating the growth
Chemicals that induce the growth or activity of commensal microorganisms (e.g., bacteria and fungi).
Types of prebiotics
On the basis of source of origin: Disaccharide
Oligosaccharide
Resistant Starch
Disaccharide
Laccitol Lactulose Xylitol
Oligosaccharide
Fructo-oligosaccharide (Fos) Galacto-oligisaccharide Insulin Xylo-oligosaccharide Soybean-oligosaccharide.
What Foods Contain Prebiotics?
Raw dandelion greens Raw garlic Raw leek Raw onion Cooked onion Raw banana
probiotics
Live microbial feed supplements that have beneficial effects on the host by improving its intestinal microbial balance.
Use of prebiotics in aquaculture
Effect on growth Feed conversion Gut microbiota cell damage/morphology resistance against pathogenic bacteria Enhance Immunity
Mechanism of action
Mechanisms by which prebiotics provide
health benefits Increases the amount of lactic acid
producing bacteria (lactobacilli and
bifidobacteria)• Increases the amount of Short Chain
Fatty Acids (SCFAs)- Butyrate,
Acetate, Lactate etc…• Activates carbohydrate
receptor immune cells
Effect of Prebiotic
On Growth of fish On immune system
Effect of prebiotics on growth parameters
A study was conducted by a scientist to find the effect of dietary Prebiotic (Saccharomyces cerevisiae),Acidifier,and prebiotic and acidifier on growth parameters.
Prebiotic and Acidifier mixed with commercial diets.
The fish were evaluated at days 10, 20, 30 and 40 of being fed by the experimental diets.
To check growth rate, feed intake.
Results
Show prebiotic and acidifier has highest feed intake.
Fish fed with prebiotic and prebiotic with acidifier displayed increased growth rate.
Effects of prebiotics on immune system
Experiments exist state their effect as:
1. Selective change in bacterial composition.
Effects of prebiotics on the gastrointestinal tract
microbial community
A significantly reduce bacterial load in the intestine. E.g. MOS
Dawson and Pirulescu 1999 stated: significantly lower Clostridium perfringens population in the gut.
block type-I fimbriae and prevents pathogens from attaching to the
intestinal lining and passes them out of the gut.
Experiment
2 month trial on tilapia, Dietary effect of Ascorbic acid on fish immunity.
Decreases the microbial diversity of gut ,shown through results.
control given normal diet. Treatment 1 given 3% AA diet. Treatment 2 given 5% AA diet.
Results
CFU Control: 7.20×10 6/gm Treatment 1(3%AA): 1.46×10 6/gm Treatment 2(5%AA): 1.04×10 6/gm Show that fishes with treatment 2 has the
lowest microbial diversity.
Demand of prebiotics in aquaculture
Aquaculture is one of the fastest growing industries in the world.
There is a need for enhanced disease resistance feed efficiency growth performance of cultured fish
species.
The cost of production need to be reduce , better capital income
growth performance and feed efficiency increase survivility of the fishes increase. Dietary supplementation of different
feed additives e.g. immunostimulants
Conclusion
Prebiotics have great potential as agents to improve or maintain a balanced intestinal microflora to enhance health and wellbeing
References
Javid Mortazavi Tabrizi1 Abolfazl Barzeghar2 Saeed Farzampour3 Hamid Mirzaii4 Saeid Safarmashaei5