Growth improvement and enhanced disease resistance against Vibrio alginolyticus using -glucan as a dietary supplement for Penaeus monodon(Fabricius)
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Authors
-
N Felix
Department of Aquaculture, Fisheries College and Research Institute, Tamil Nadu Veterinary and
Animal Sciences University, Thoothukudi, Tamil Nadu - 628 008, India
-
M J Prince Jeyaseelan
Department of Aquaculture, Fisheries College and Research Institute, Tamil Nadu Veterinary and
Animal Sciences University, Thoothukudi, Tamil Nadu - 628 008, India
-
C John Wesly Kirubakaran
Department of Aquaculture, Fisheries College and Research Institute, Tamil Nadu Veterinary and
Animal Sciences University, Thoothukudi, Tamil Nadu - 628 008, India
Abstract
An investigation was carried out to determine the effect of oral administration of
- glucan on the growth and disease
resistance of
Penaeus monodon (mean initial weight 0.036 ± 0.002 g) against Vibrio alginolyticus.
Three types of diets were
prepared with the supplementation of
- glucan at 0.1 %, 0.7 % and 1.3 % concentrations along with an unsupplemented
control. After 75 days of feeding, weight gain, specific growth rate and survival were found to be higher in shrimps fed with
Â
- glucan supplemented diets when compared to those fed with the control feed. When shrimps were challenged with
Vibrio
alginolyticus
, the survival of shrimp fed with- glucan supplemented diets was found to be significantly higher (p<0.05)
when compared to those fed with control diet. Among the
Â
- glucan supplemented diets, the shrimp fed with diet supplemented
with 0.7 % and 1.3 % showed almost similar weight gain and resistance against
Vibrio alginolyticus
infection. The results
suggests that
- glucan at around 0.7% concentration is ideal for feed supplementation to improve weight gain and disease
resistance of
P. monodon
.
