Research Article: Dietary supplementation of savory (Satureja hortensis L) extract improves the growth performance, hematological, and immune parameters of stellate sturgeon (Acipenser stellatus)

The study investigated the effect of dietary supplementation with savory (Satureja hortensis) extract (SE) on stellate sturgeon (Acipenser stellatus) growth and health status. The fish with an initial body weight of ۶۸.۹۴±۲.۸ g were allocated randomly into ۹ tanks, with a stocking density of ۵ fish per tank and were fed with an un-supplemented diet (control, SE۰), ۱% SE (SE۱), and ۲% SE (SE۲) for ۸ weeks in freshwater. After ۸ weeks, the feeding was stopped for ۲۴ h and the blood samples were collected to measure immune parameters. The results showed that SE۲ exhibited significantly higher values for final weight (۱۶۴.۶۷ g), specific growth rate (۱.۵۵ %/day), and weight gain (۹۵.۹۰ g) as compared to the SE۰ (p<۰.۰۵). No statistically significant effects were noted among the experimental treatments in terms of the survival rate (p>۰.۰۵). The experimental diets significantly affect hematocrit and the highest level was observed in SE۲. Total immunoglobulin, lysozyme, and ACH۵۰ levels were significantly higher in the supplemented diets (p<۰.۰۵). The present study demonstrates that the administration of savory extract can improve the growth and immunity in stellate sturgeon.

کلیدواژه ها:

Immunity ، Starry sturgeon ، Acipenser stellatus ، Herbal extract ، Growth performance