Different sterategies to improve immunity of aquatics

Improved growth, nutritional efficiency and resistance aganist diseases are among the most important goals of the aquaculture industry. Sustainable aquaculture development requires the use of novel techniques mainly including the use of probiotics to optimize the physiochemical factrors of rearing environment and improving the animal performance. In this regard, the isolation of biologically active bacteria from the intestines of farmed fish and the use of commercial products of such beneficial bacteria as an important strategy for biocontrol and bio-enhancement of aquatic animal performance would play a very important role in achieving aforementioned objectives of the industry. However, using ingredients which are not of nutritional importance to aquatic animal per se (prebiotics), while are beneficial to probiotic bacteria (synbiotics) can be effective in improving immune system of aquatics.