Mir Ahmadi Baba Heydari, S. B. (2020) Effect of density and probiotics on growth, survival, carcass quality, blood parameters and intestinal microbial flora in western white shrimp (Litopenaeus vanneme). Doctoral thesis, University of Zabol.
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Abstract
The aim of this study was to investigate the interaction of probiotics and density on growth, survival, carcass quality, blood parameters and intestinal microbial flora in white (Litopenaeus vannemei). For this purpose, 3600 shrimp larvae with age of 15 days (PL20) with an average weight of 50 6 6 mg were prepared from Shahid Kolahy Aquatic Breeding Center of Minab, Hormozgan and in 8 treatments, each with 3 replications were distributed in 300-liter circular fiberglass tanks with 250 liters of water and adapted to the new conditions for a week, during which time they were fed with control food. Post-larvae were fed daily in three meals at 6, 14 and 22 hours by food number 4001 and from the middle of the period by food number 4002, at a rate of 7% of body weight for 60 days and were examined in a completely randomized design. The results showed that the interaction effect of probiotics and density on the improvement of some growth indices was not significant (P>0.05) but on the amount of fat indices, final protein, fat efficiency and protein ratio obtained in different treatments were significant (P <0.05). Significant changes were observed in carcass chemical composition index between different treatments except for two indices of energy and soluble carbohydrates (P <0.05). Interaction of probiotics and density on protein as the most important carcass composition among samples treated with probiotics, mixed treatment and additive to water of density 200 showed a significantly higher difference with probiotics added to feed of density 100 and 200. Also, the interaction of probiotics and density on all blood biochemical parameters showed a significant difference (P <0.05). The amount of total protein and albumin in the feed additive treatment increased significantly at both densities (P <0.05). Higher levels of lysozyme and lower levels of cortisol were assigned to the feed additive treatment at both densities, although it was not statistically significant with some treatments (P> 0.05). ALT and AST enzyme levels of feed additive treatment, although did not show a significant difference with the treatment without probiotics, but numerically, had the lowest value compared to other treatments (P <0.05). ALP and glucose levels were the highest in non-probiotic treatments with a density of 200 and a mixture of 100, respectively (P <0.05). The highest level of immunoglobulin was observed in the additive treatment to feed 100 and showed the highest significance with the mixed treatment at the same density (P <0.05). ALP and glucose levels were the highest in non-probiotic treatments with a density of 200 and a mixture of 100, respectively (P <0.05). The highest level of immunoglobulin was observed in the additive treatment to feed 100 and showed the highest significance with the mixed treatment at the same density (P <0.05). In addition, the interaction of probiotics and density caused significant changes in the bacterial flora of TGNB, Enterococcus and coliforms of the shrimp gastrointestinal tract (P <0.05). In relation to other probiotic strains, although there were no significant changes, yeast density, lactobacilli, dietary additives and mixed bacillus treatment 200 showed higher numerical values (P> 0.05). The results of this study showed that although the interaction of probiotics and density did not have a significant effect on growth and nutrition indices, but on the indices of carcass chemical composition, safety and some intestinal bacterial densities were significant and in this Between treatments probiotic additive to feed with a density of 200 showed better effect.
| Item Type: | Thesis (Doctoral) |
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| Uncontrolled Keywords: | Western White Shrimp, Probiotics, Density, Growth Indices, Immunity Improvement, Gastrointestinal Bacterial Flora |
| Subjects: | Q Science > QL Zoology |
| Depositing User: | Mrs najmeh khajeh |
| Date Deposited: | 18 Oct 2021 08:03 |
| Last Modified: | 18 Oct 2021 08:03 |
| URI: | http://eprints.uoz.ac.ir/id/eprint/2770 |
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