en aquaculture aquaculture پژوهشي Orginal research papers <span lang="TR" style="font-size:11.0pt"><span calibri="" style="font-family:"><span style="color:black">The study investigated the effect of dietary supplementation with savory (<i>Satureja hortensis</i>) extract (SE) on <a href="http://www.sturgeon-web.co.uk/stellate-sturgeon-acipenser-stellatus"><span style="background:white"><span style="color:black"><span style="letter-spacing:.25pt"><span style="text-decoration:none"><span style="text-underline:none">stellate sturgeon (<i>Acipenser stellatus</i>)</span></span></span></span></span></a> growth and health status. The fish with an initial body weight of 68.94&plusmn;2.8 g were allocated randomly into 9 tanks, with a stocking density of 5 fish per tank and were fed with an un-supplemented diet (control, SE0), 1% SE (SE1), and 2% SE (SE2) for 8 weeks in freshwater. After 8 weeks, the feeding was stopped for 24 h and the</span></span></span><span lang="TR" style="font-size:11.0pt"><span calibri="" style="font-family:"><span style="color:black"> blood samples were collected to measure immune parameters. The results showed that </span></span></span><span lang="TR" style="font-size:11.0pt"><span calibri="" style="font-family:"><span style="color:black">SE2 exhibited significantly higher values for final weight (164.67 g), specific growth rate (1.55 %/day), and weight gain (95.90 g) as compared to the SE0 (<i>p</i><0.05). No statistically significant effects were noted among the experimental treatments in terms of the survival rate (<i>p</i>>0.05). The experimental diets significantly affect hematocrit and the highest level was observed in SE2. Total immunoglobulin, lysozyme, and ACH50 levels were significantly higher in the supplemented diets (<i>p</i><0.05). The present study demonstrates that the administration of savory extract can improve the growth and immunity in stellate sturgeon.</span></span></span> Immunity, Starry sturgeon, Acipenser stellatus, Herbal extract, Growth performance 527 537 http://jifro.ir/browse.php?a_code=A-10-5028-1&slc_lang=en&sid=1 Y. Ebrahimi ebrahimiyaser60@gmail.com 100319475328460056741 100319475328460056741 No Department of Fisheries, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran S. Bahram Bahram.somayeh123@gmail.com 100319475328460056742 100319475328460056742 Yes Department of Fisheries, Qaemshahr Branch, Islamic Azad University, Qaemshahr, Iran