The effect of probiotic bacteria isolated from fish intestines of Khuzestan, Bushehr and Hormozgan provinces on oxidative stress system in liver tissue and blood serum of Asian sea bass (Lates calcarifer)

Abstract

Introduction: Probiotics are bacteria that in sufficient quantities have beneficial effects on the
host. Today, the use of probiotics as food supplements in the aquatic industry has grown
exponentially.
Materials & Methods: The aim of this study was to investigate the effect of various probiotics
on antioxidant factors in the liver and blood serum of Asian sea bass (Lates calcarifer). For this
purpose, Asian bass fish with an initial weight of 171.29±8.79 g, for 60 days using four diets
including control group (without bacteria), the first group (selected strain isolated from fish in
Khuzestan province), the second group (selected strain isolated from fish of Bushehr province)
and the third group (selected strain isolated from fish of Hormozgan province) were fed. Fish
sampling was performed on days 0, 30, and 60 of the experiment.
Results: The results showed that after 60 days of probiotic use, liver superoxide dismutase
levels decreased in all groups and glutathione levels in the second and third groups increased
significantly compared to the control group (p<0.05). Also, serum superoxide dismutase levels
in all groups and glutathione levels in the first group increased significantly compared to the
control group (p<0.05).
Conclusion: The results of this study showed that the selected strain isolated from fish in
Khuzestan, Bushehr, and Hormozgan provinces can improve the antioxidant indices of the liver
and serum of Asian seabass.