IMPACTS OF SPIRULINA PLATENSIS IN FISH DIETS ON GROWTH PERFORMANCE AND IMMUNITY OF OREOCHROMIS NILOTICUS AND THE ANTIMICROBIAL ACTIVITY OF SPIRULINA EXTRACTS
Reham A. E. Abd – El hay1; Walaa T. El Ekiaby2 and Samah A.A.2
1Limnology Dept., Central Lab. for Aquaculture Research, Agricultural Research Center.
2Fish health Dept., Central Lab. for Aquaculture Research, Agricultural Research Center.
|Received 17/ 2/ 2016||
Accepted 5/ 3/ 2016
This study was conducted in two experiments. The first experiment aimed to test Spirulina extracts against pathogenic bacteria by three types of solvents “petroleum ether ,diethyl ether and acetone” The second experiment aimed to evaluate of the use of Spirulina at different rates “10-15 and 20 g/kg feed” on growth performance of Oreochromis niloticus and fish immunity (Heamatocrite, Lysozome, Respiratory Brust and Total Antioxidant Capacity).The results clear that: First :the acetone extract had significantly antibacterial against bacteria. Second: The addedtive of Spirulina in fish diets were significantly increased growth performance of Nile Tilapia. The 15g Spirulina in fish diets were significantly increased of fish immunity. The permissible level of Spirulina to fish diets was 15g/kg feed. The study recommended using Spirulina in fish diets on a commercial scale.