Effect of the extract of lemon verbena (Aloysia citrodora) on the growth performance, digestive enzyme activities, and immune-related genes in Siberian sturgeon (Acipenser baerii)

Abstract Herbal extracts are illustrated as functional substances for sustainable aquaculture. The study evaluated the effects of lemon verbena (LV) extracts (0, 5, 10, and 20 mg/kg) on the performances of the Siberian sturgeon. Fish fed the test diets for eight weeks, then the growth performance and health condition were tested. The results showed enhanced gain weight and specific growth rate in 5, 10, and 20 g/kg groups (P