1. Abdallah MAM, Morsy FAE (2013) Persistent organochlorine pollutants and metals residues in sediment and freshwater fish species cultured in a shallow lagoon, Egypt. Environ Technol 34:2389–2399
2. Afshar Mazandaran N and Rajab A (2001) Probiotics and their use in animal and poultry diets. Second edition, Noorbakhsh Tehran Publication, 392 pp
3. Anderson, DP (1990) Immunological indicators: effects of environmental stress on immune protection and disease outbreaks. In: American fisheries society symposium, 8:38–50
4. AOAC (1990) Association of official analytical chemists, official methods of analysis, 15th edn. Office of the Federal Register, Washington, D.C.
5. Ayyat MS, El-Marakby HI (2005) Studies on counteracting the dietary mercury toxicity in Nile tilapia (Oreochromis niloticus). Egypt J Nutr feeds 8(especial issue):1129–1144