Effect of propolis on blood electrolyte levels of juvenile rainbow trout (Oncorhynchus mykiss W. 1792) under hypoxic stress

In this study, the effect of dietary supplementation of propolis on blood electrolytes (Na⁺, K⁺, Ca⁺², Mg⁺², Cl^-) of juvenile rainbow trout under hypoxic stress (4.5 mg/l 0₂) was investigated. Three diets were prepared differing only in the type of supplementation as follows: P10 dietary group with 10 g/kg propolis, P30 dietary group with 30 g/kg propolis and control (C) dietary group with no propolis. Based on statistical evaluations, it was observed that serum Ca⁺ and K⁺ level of C group was significantly higher than P10 and P30 groups (p<0.05). Serum Na⁺ and Cl^- levels of C groups were determined to be significantly lower than P10 and P30 groups (p<0.05). Serum Mg⁺² level was not statistically different among the groups (p>0.05).