Effect Of Lactobacillus Acidophilus And Mannan Oligosaccharide On Growth Performance, Digestive Enzyme Activities, Intestinal Morphology, Haematology And Resistance Of Striped Catfish (Pangasianodon Hypophthalmus, Sauvage, 1878) Juveniles Against Aeromonas Hydrophila
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Date
2015-12
Authors
Akter, Mst. Nahid
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Disease has been considered one of the most significant concern for the
sustainable development of striped catfish, Pangasianodon hypophthalmus,
therefore, a series of experiments were carried out to determine the most suitable
level of probiotic Lactobacillus acidophilus (LAB) and prebiotic mannaan
oligosaccharide (MOS), respectively, that can promote growth and improve the
health status of e striped catfish. Triplicate groups of e striped catfish (initial weight
21.69±0.18 g) were fed twice daily at 2.5% of body weight, with 0 (control), 103,
105, 107 and 109 CFU/g LAB diets, for 12 weeks. Results revealed that the growth
performance and health status based on haematology and immunological parameters
were significantly improved when fish were fed the diet supplemented with
105CFU/g and above LAB. In another study under similar experimental conditions,
when striped catfish (20.41±1.64g) were fed with five experimental diets containing
0 (Control), 0.2%, 0.4%, 0.6% and 0.8% MOS, respectively, the growth performance
and health status were significantly improved for 0.6% MOS diet fed group than the
control fed group. The effect of LAB or MOS supplementation on diet digestibility
and subsequently the growth and health status, were evaluated by feeding fish
(20.50±0.28 g) with test diets in which 45% of fish meal protein was replaced with
soybean meal protein. Although feeding fish with the LAB or MOS supplemented in
the diets containing SBM did not improve the growth performance and nutrient
digestibility, the health status of striped catfish was significantly improved by
increasing the haematological parameters, total immunoglobulin content and
lysozyme activity. Based on the results of all the studies, it can be concluded
that supplementation with 105 CFU/g of LAB and 0.6% MOS is sufficient to
improve growth and health status of e striped catfish when they were exposed to A.
hydrophila CT19. Further, supplementation of a soybean based diet containing 55%
protein from FM and 45% protein from soybean meal with 105 CFU LAB or 0.6 %
MOS, improves the health status of P. hypopthalmus es without compromising
growth and nutrient digestibility.
Description
Keywords
Lactobacillus acidophilus