Evaluation of the use of chronic ozone concentrations on growth and survival, Body composition, and water quality of West White leg Shrimp (Litopenaeus vannamei)

Water quality management in culture ponds is the most important factor in the proper growth of shrimp and achieving proper production, which can help to improve the quality of the conditions of the pool floor and achieve the desired production. Poor quality water causes stress and illness. Today, ozone technology can be used in areas with viruses, bacteria, and fungi. Due to the high oxidation potential, ozone oxidizes the cellular components of the bacterial cell wall to reduce the number of inactive microorganisms. In this study, chronic ozone concentrations (0.02, 0.04, 0.06 mg/l) were applied serially to western white-leg shrimp for 60 days two hours after each diet. During the experiment, quality factors were measured, and at the end, growth factors and Body composition were performed. The results showed that salinity and temperature were in the optimal range of western white-leg shrimp and there was no significant difference between treatments (p>0.05). With increasing ozone concentration between treatments, dissolved oxygen, pH and nitrate increased and total ammonia, suspended solids, and nitrite decreased. Also, according to Body composition, there was a significant difference between the treatments in protein and ash levels with a decreasing trend and fat and moisture with an increasing trend concerning ozone concentration. The results of growth factors showed a significant difference between ozone levels, indicating the optimal level of growth factors in concentrations of 0.02 and 0.04, respectively.