Document Type : Research Paper
Authors
1
1 Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
2
DVM, Graduated from the Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
3
Department of Clinical Sciences, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
4
Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
10.22055/ivj.2023.379766.2543
Abstract
Objectives: The present study was carried out to evaluate the influence of dietary supplementation of two strains of intestinal autochthonous bacteria Lactobacillus plantarum, Lactobacillus pentosus from the intestinal tract of the Shabot (Tor grypus) with β-glucan on growth performance, and digestive enzyme activity on the fingerlings of Oncorhynchus mykiss. Methods: The fish were distributed randomly into 8 treatment groups (feeding with isocaloric and isonitrogenous diet for 60 days) containing control (group 1), 1% β-glucan (group 2), Lactobacillus plantarum (group 3), Lactobacillus pentosus (group 4), Lactobacillus plantarum + Lactobacillus pentosus (group 5), Lactobacillus plantarum with 1% β-glucan (group 6), Lactobacillus pentosus with 1% β-glucan (group 7), Lactobacillus plantarum + Lactobacillus pentosus with 1% β-glucan (group 8). Results: After 60 days, the fish fed combination of two probiotics at equal proportion with 1% β-1,3-glucan (group 8) had higher (P < 0.05) growth performances than the other treatment groups. Digestive enzyme activities like ALP, α-amylase, trypsin, lipase and protease in groups including probiotics and prebiotic, particularly in group 8 in parallel with growth performances, had higher (P< 0.05) than other groups. However, the enzyme activity of chemotrypsinhad no significante difference between treatments (P > 0.05). Conclusions: These results indicate that combination host-derived probiotics (L. plantarum and L. plantarum) with β-1,3-glucan have a significant potential as an important synbiotics to enhance the nutrients utilization and activity of digestive enzymes in rainbow trout juveniles, However, further research is needed to determine the proper supplement for this commercially valuable product.
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