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Article Title:
COMBINATIONAL EFFECTS OF MANNAN (MOS) AND CHITOSAN ON SURVIVAL, GROWTH PERFORMANCE, FEED UTILIZATION, BODY COMPOSITION AND INTESTINAL HISTOLOGY OF SEA BASS(DICENTRARCHUS LABRAX)
| Abstract: This study was conducted in order to investigate the combined effect of dietary Mos and chitosan on sea bass fry (initial weight of 0.30±0.01 g/fish) were fed either control diet without Mos and chitosan or one of five dietary diets (0.5, 1.0, 2.0. 3.0 & 4.0 g/kg diet-1). After 75 days feeding, the results showed that; the highest weight gain (WG) was recorded with fish fed diet 3 (1 g kg-1 of Mos and Chitosan) and diet 4 (2 kg-1 of Mos and Chitosan), compared with fish that were fed on the control diets. The best significantly survival rate was recorded at the fish were fed on the diet 3 compared with fish were fed diets 5 & 6. Feed conversion ratio (FCR) among the fish groups that were fed on Mos and Chitosan are significantly had FCR value better than the fish fed on the control diets. Protein efficiency ratio (PER) were be recorded significantly the highest value among the fish fed on the diets of 5 and 6 compared to the fish were fed on the control diet. Chemical composition of whole fish at the end of the experiment period showed that, the crude protein and gross energy was observed remarkably higher in the group of fish fed on diet 3. The results for dry mater were similar in all fish groups except for fish fed on diet 4 which had lower value. The crude fat value reaches maximum of fish fed on diet 1 and 2. In our study the intestinal microvillus length increased with increasing mixture of Mos and chitosan levels and became well developed at concentration levels 1 & 2 g kg diet-1, while, at higher concentrations of mixture of Mos and chitosan, were highly developed to a degree of blocking the intestine pathway. In conclusion, Chitosan and Mos mixture diets could enhance the growth performance, Non-specific responses and reduce mortality in sea bass, higher than separated Chitosan and Mos diets due to synergistic effects of both compounds. © Ideal True Scholar KEYWORDS: |
| Keywords: Sea Bass- Mos – Chitosan- Growth performance- Intestine Morphology |
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