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Effects of different levels of dietary pectin and probiotic Lactobacillus plantarum on growth indices and antioxidant defense in Asian sea bass (Lates calcarifer)
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Mohammad Homayuni1   , Mirmasoud Sajjadi1 * , Bahram Falahatkar1 , Rogayeh Safari2 , Seyed Hosein Hoseinifar2 |
1-Department of Fisheries, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, Iran , mmsajjadi@hotmail.com
2- Department of Fisheries, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran |
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Abstract: (266 Views) |
Introduction: Aquatic animals are consistently exposed to the threats of environmental deterioration and infection outbreaks because of the excessive use of antibiotics and synthetic drugs. This practice leads to the accumulation of residues in aquatic systems and the development of antimicrobial resistance among pathogens. Nature-based solutions, such as functional feeds containing synbiotics and their active components, such as probiotics, prebiotics, and postbiotics, play a crucial role in maintaining a healthy environment and promoting the well-being of animals in aquaculture. Drawing upon a thorough literature survey and experimental evidence, these agents have been shown beneficial to aquatic animals and their ecosystems. Consequently, these synbiotic agents and related components emerge as promising natural alternatives to traditional synthetic drugs and antibiotics in aquaculture. Therefore, considering the importance and properties of pectin and the probiotic bacteria L. plantarum, in the present study, the effects of separate and combined use of pectin and L. plantarum on Asian sea bass were investigated in order to investigate the growth performance and antioxidant indices in Asian sea bass.
Materials and Methods: The effects of different levels of dietary pectin and probiotic Lactobacillus plantarum on growth and antioxidant defense indices in Asian sea bass with an average weight of 8.2±0.2 g and 900 fish in 6 treatments and 3 replications were conducted for 8 weeks at Niksa Design and Development Company farm in Charak city of Hormozgan province in 200 L fiberglass tanks. In this study, pectin extract at levels of 0.5 and 1% and Lactobacillus plantarum at a rate of 108 L. plantarum cells were used. At the end of the period, growth factors and antioxidant indices were examined.
Results and Discussion: In the study of the interaction effect of pectin and L. plantarum, final weight, final length, weight gain, weight gain percentage, lipid efficiency ratio, protein efficiency ratio and specific growth rate, there was a significant difference between the combination treatment of 1% pectin and 108 CFU/g L. plantarum and other treatments (p<0.05). Also, among the separate treatments, a significant difference was observed in the treatment containing 108 CFU/g L. plantarum compared to the separate treatments containing pectin (p<0.05). In the index of feed conversion ratio and condition factor, the combined treatments containing pectin and L. plantarum with an interaction effect, as well as the treatment containing 108 CFU/g L. plantarum, showed a significant difference with other experimental treatments (p<0.05). There was a significant difference in the levels of catalase and superoxide dismutase between the combined treatment of 1% pectin and 108 CFU/g L. plantarum and other treatments (p<0.05). Among the separate treatments, a significant difference was observed in the treatment containing 108 CFU/g L. plantarum and 1% pectin compared to other treatments (p<0.05). In the amount of glutathione peroxidase of the combined treatments containing pectin and L. plantarum with an interaction effect, a significant difference was observed compared to the other experimental groups (p<0.05). There was a significant difference between the individual treatments, such that in the treatment containing 108 CFU/g L. plantarum and 1% pectin, it was observed compared to the other treatments (p<0.05).
Conclusion: According to the results of this study, the combination of 1% pectin and 108 CFU/g L. plantarum can be used in combination per kilogram of fish diet to increase production and antioxidant indices in Asian sea bass.
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| Keywords: Probiotics, Barramundi, Immune Stimulants, Prebiotics |
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Type of Study: Research |
Subject:
Special
Received: 2025/09/2 | Accepted: 2025/09/13
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