A Comparison of dietary Immunogen Prebiotic and Protexin Probiotic on Growth and Survival Rate of Astacus leptodactylus, Eschscholtz, 1823
Subject Areas : New Technologies in Aquaculture Development
Keywords: Nutrition, growth, Probiotic, Prebiotic, protexin, Keywords: Astacus leptodactylus, Immunogen,
Abstract :
Abstract[1] An 8-week experiment was conducted on the to effects of dietary Immunogen prebiotic and Protexin probiotic on growth indices and survival of Astacus leptodactylus. This experiment was done with two treatments, including of trade probiotic (Protexin) in levels 1 and 3 g/kg in food, and a kind of prebiotics with trade name of Immunogen prebiotic in levels 2 and 4 g/kg in food, and control group without probiotic and prebiotic and three replication for each of them with energy 4500 cal/gr and with 40 percent protein and 7 percent lipid. 120 crayfish with an average individual weight of 23.05±0.74 gram were selected and randomly stocked into the 15 fiberglass tanks of 100 liter capacity and tanks were filled with 70 liter freshwater and approximately 30% of the total water volume was replaced daily with freshwater. The experimental Cray fish were fed with diet pellet 1 once a day according to 3% of body weight at 5:00 pm. the results showed with adding probiotic and prebiotic in experimental dietary, such growth indices of crayfish as weight gain, mean daily growth, specific growth rate, food conversion ratio, protein efficiency rate were improved as there are statistical significant differences among treatment with 3 g/kg probiotic and control diet (p Astacus leptodactylus and in all of the levels the most effective content were levels of 3 g/kg probiotic in probiotic treatment and in the prebiotic treatments,the best level was 2 g/kg prebiotic in dry food. *- Corresponding authors; amir_sajedi61@yahoo.com
_||_