Effects of chito-oligosaccharides supplementation on growth performance, intestinal cytokine expression, autochthonous gut bacteria and disease resistance in hybrid tilapia Oreochromis niloticus ♀ × Oreochromis aureus ♂
| Autor: | Zhigang Zhou, Wenshu Liu, Li Xu, Chubin Qin, Yalin Yang, Yuting Zhang |
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| Rok vydání: | 2014 |
| Předmět: |
food.ingredient
Gene Expression Oligosaccharides Aquatic Science Bacterial Physiological Phenomena Real-Time Polymerase Chain Reaction Feed conversion ratio Microbiology Fish Diseases food medicine Environmental Chemistry Animals Oreochromis aureus Food science Pathogen Disease Resistance Chitosan biology Bacteria Tilapia General Medicine Bacterial Infections Cichlids biology.organism_classification Animal Feed Diet Intestines Aeromonas hydrophila Oreochromis Chitinase Dietary Supplements biology.protein Cytokines medicine.symptom Weight gain |
| Zdroj: | Fishshellfish immunology. 40(1) |
| ISSN: | 1095-9947 |
| Popis: | We investigated the effects of incorporating chitinase (ChiB565)-hydrolyzed shrimp shell chitin into the diet of hybrid tilapia (Oreochromis niloticus ♀ × Oreochromis aureus ♂) with regard to production, intestinal immune status and autochthonous gut bacteria, and protection against bacterial pathogen Aeromonas hydrophila. Five experimental diets were formulated by supplementing the basal diet with the hydrolyzed shrimp shell chitin (0.0%, T1 control; 0.8%, T3; 1.6%, T4; or 2.4%, T5) or 0.1% commercial chitosan-oligosaccharides as commercial recommendation dose (T2, positive control). After a 35-day feeding trial, we found no significant difference in weight gain, feed conversion ratio or survival rate in tilapia among all treatment groups. However, the levels of mRNAs encoding the pro-inflammatory protein tumor necrosis factor-α and the stress-response protein heat shock protein 70 were much lower in groups T2, T3, T4 and T5 (p |
| Databáze: | OpenAIRE |
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