then their overall production cost would be remarkably reduced
Dietary effect of prebiotic supplementation on fish
In 1995Concept was introduced
By Gibson and Roberfroid.
Resistant to hydrolysis
Fermented by intestinal microbiota.
Selectively stimulate growth or activity of
beneficial intestinal bacteria i.e,
Non-digestible food ingredient that beneficially
affects the host by selectively stimulating the
Chemicals that induce the growth or activity
of commensal microorganisms (e.g., bacteria
On the basis of source of origin:
Raw dandelion greens
Live microbial feed supplements that have
beneficial effects on the host by improving its
intestinal microbial balance.
Effect on growth
resistance against pathogenic bacteria
Mechanisms by which prebiotics provide
Increases the amount of lactic acid
producing bacteria (lactobacilli and
• Increases the amount of Short Chain
Fatty Acids (SCFAs)- Butyrate,
Acetate, Lactate etc…
• Activates carbohydrate
receptor immune cells
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
The fish were evaluated at days 10, 20, 30 and
40 of being fed by the experimental diets.
To check growth rate, feed intake.
Show prebiotic and acidifier has highest feed
Fish fed with prebiotic and prebiotic with
acidifier displayed increased growth rate.
Experiments exist state their effect as:
1. Selective change in bacterial composition.
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
passes them out of the gut.
2 month trial on tilapia, Dietary effect of
Ascorbic acid on fish immunity.
Decreases the microbial diversity of gut ,shown
control given normal diet.
Treatment 1 given 3% AA diet.
Treatment 2 given 5% AA diet.
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.
Aquaculture is one of the fastest growing
industries in the world.
There is a need for enhanced
growth performance of cultured fish species.
growth performance and feed efficiency increase
survivility of the fishes increase.
Dietary supplementation of different feed
additives e.g. immunostimulants
Prebiotics have great potential as agents to improve
or maintain a balanced intestinal microflora to
enhance health and wellbeing