Effect of different levels of essential oils (<i>Satureja hortensis</i>) in diet on improvement growth, blood biochemical and immunity of Angelfish (<i>Pterophyllum scalare</i> Schultze, 1823)

<p>The aim of this study was designed to analyse the effect of Savoury essential oil (<i>Satureja hortensis</i>) on growth performance, biochemical parameters and immunity of angelfish (<i>Pterophyllum scalare</i>). The angelfishes (average body weight of 5.12 ± 0.01 g) were treated with three effective dosage of Savoury essential oil 100, 200 and 400 mg/kg in three separated aquaria water with one control group for 60 days. At the end of experiment, the angelfishes treated with 400 mg/kg Satureja showed minimum Feed Conversion Ratio, maximum Specific Growth Rate and Survival Rate. There was significant difference (<i>p</i> < 0.05) between the treated and control fish in the serum total protein, albumin, globulin, triglyceride, cholesterol, glucose and cortisol. Maximum significant amount (<i>p</i> < 0.05) in immunoglobulin is found in both 200 and 400 mg/kg Savoury concentration group, while significant enhancement in serum lysozyme was only found in 200 mg/kg group. Overall, the results presented in the current study revealed that savoury is a beneficial dietary supplement to improve growth performance, stress resistance and innate immune response of angelfish and the best level of inclusion was 200 mg/kg.</p