S Bazari Moghaddam - International Sturgeon Research Institute, Iranian Fisheries Science Research Institute Agricultural Research Education and Extension Organization, Rasht, Guilan, Iran
F Bagherzadeh Lakani - International Sturgeon Research Institute, Iranian Fisheries Science Research Institute Agricultural Research Education and Extension Organization, Rasht, Guilan, Iran
J Jalilpour - International Sturgeon Research Institute, Iranian Fisheries Science Research Institute Agricultural Research Education and Extension Organization, Rasht, Guilan, Iran
M Masoumzadeh - International Sturgeon Research Institute, Iranian Fisheries Science Research Institute Agricultural Research Education and Extension Organization, Rasht, Guilan, Iran
A Shenavar Masouleh - International Sturgeon Research Institute, Iranian Fisheries Science Research Institute Agricultural Research Education and Extension Organization, Rasht, Guilan, Iran

In recent years, the used of herbal medicine as an alternative method has been introduced to prevent diseases and increase survival in aquaculture. This study was performed to evaluate the effects of two types of powdered extract Echinacea purpurea and Allium sativum on growth indices and survival rate of Huso huso during a two-month period. For this purpose, ۲۱۰ fry with an average weight of ۲۷.۷۴± ۰.۲۶ g were randomly placed in ۲۱ half-ton fiberglass tubs in seven different treatments with three replications, including a control group and three experimental groups of different amounts of Echinacea purpurea powder extract (۲۵۰, ۵۰۰ and ۱۰۰۰ mg/kg) and three experimental groups of different amounts of garlic powder extract (۲۵۰, ۵۰۰ and ۱۰۰۰ mg/kg) were studied. At the end of experiment, a statistically significant difference was observed between the treatments in the mean final weight, mean final length, final biomass, final production, fish weight gain, mean daily growth, body weight gain increase, specific growth rate and daily growth rate (p<۰.۰۵). These indices in the treatments had an increasing trend compared to the control and in T۶ (۱۰۰۰ mg of Echinacea purpurea powder extract per kg of food) was significantly higher than other treatments (p<۰.۰۵). The feed conversion ratio in this treatment also decreased significantly compared to other treatments (p<۰.۰۵). The results of this study showed that the addition of ۱۰۰۰ mg of turmeric powder extract per kg of food is more effective in improving growth indices.

Huso huso, Echinacea purpurea, Allium sativum, Growth