Abdullah, S. and Muhammad, J (2006) Studies on acute toxicity of metals to the fish, Catla catla. Pakistan Journal of Biology Sciences, 9(9): 1807-1811. Atchison, G.J., Sandheinrich, M.B. and Bryan, M.D (1996) Effects of environmental stressors on interspecific interactions of aquatic animals. In Newman, M.C., and Jagoe, C.H.(eds). Quantitative Ecotoxicology: A Hierarchical Approach. Chelsea, MI: Lewis. ATSDR (1990) Toxicological Profile for Copper. U.S Public Health Service. Agency for Toxic Substances and Disease Registry, Atlanta, G.A. Bagdonas, E. and Vosylienė, M.Z (2006) A study of toxicity and genotoxicity of copper, zinc and their mixture to rainbow trout (Oncorhynchusmykiss). Biologiaja, Nr (1): 8–13. Ezeeonyejiaku, C.D., Obiakor, M.O. and Ezenwelu, C.O (2011) Toxicity of copper sulphate and behavioral locomotor response of tilapia (Oreochromis niloticus) species., Awka, Anambra State Volume 1, Issue 4: 130-134. Farhangi, M (2010) In vitro, Determination of LC5096h of zinc on common carp (Cyprinus carpio). 2nd International congress on aquatic animal health Effect of Copper...78 management and disease, October, 26-27, 2010 .Tehran- Iran. Farhangi, M. and Hajimoradloo, A.M (2008) The study of clinical signs of acute toxicity by ammonia on rainbow trout (Oncorhynchus mykiss). The First National Conference on the Caspian Sea Fisheries Resources. 9-10 November, 1999. Gorgan, Iran. Giguere, A., Campbell, P.G.C., Hare, L., McDonald, D.G. and Rasmussen, J.B (2004) Influence of lake chemistry and fish age on cadmium , copper, zinc concentrations in various organs of indigenous yellow perch (Perca flavescens). Canadian Fish Aquaculture Sciences, 61:1702-1716. Gul, A., Yilmaz, M. and Isilak, Z (2009) Acute Toxicity of Zinc Sulphate (ZnSO4.H2O) to Guppies (Poecilia reticulate). Journal of Science, 22 (2): 59-65.Horne, M.T. and Dunson, W.A (1995) Effects of Low pH, Metals, and Water Hardness on Larval Amphibians. Archives of Environmental Contamination and Toxicology, 29: 500-505. Imanpour Namin, J.*, Mohammadi, M., Heydari, S., Monsef Rad, F., ( 2011 ) Heavy metals Cu, Zn, Cd and Pb in tissue, liver of Esox lucius and sediment from Anzali International Lagoon- Iran , Caspian Journal of Environmental Sciences, 9, 1-8. Khunyakari, R.P., Vrushali, T., Sharma, R.N. and Tare, V (2001) Effects of some trace heavy metals on Poecilia reticulate”. Journal of Environmental Biology, 22 (2): 141- 144. Kirk, R.S. and Lewis, J.W (1993) An evaluation of pollutant induced changes in the gills of rainbow trout using scanning electron microscopy. Environmental Technology, 14: 577–585. Knoph, M.B (1996) Gill ventilation frequency and mortality of Atlantic salmon (salmo salar) exposed to higher ammonia levels in seawater. Water Research oxford, 30: 837-842. Lemus, M.J. and Hung, K.S.C (1999) Effect of Temperature on Copper Toxicity, Accumulation and Purification in Tropical Fish Juveniles Petenia kraussii(Pisces: Cichlidae). Caribbean Journal of Science, 35 (1-2): 64-69. Ololade, A. and Oginni, I (2010). Toxic stress and hematological effects of African catfish, Clarias gariepinus, fingerlings. Journal of environmental chemistry and Ecotoxicology, 2 (2): 14-19. Olaifa, F. E., Olaifa, A. K. and Onwude, T. E (2004) Lethal and sub lethal effects of copper to African catfish (Clarias gariepinus). African Journal of Biomedical Research, 7: 65 -70. Peyghan, R (1999) Study of experiential of acute toxicity by ammonia in common carp (Cyprinus carpio) based on histopathological changes and serum enzymes and possibility of prevent it by zeolite. Ph.D Dissertation of Aquatic Animal Health Management and Diseases. Tehran University. 104 p. Rahbar Hashemi, M. M.*, Ashournia, M., Rahimipour, M. A., Modaberi, H., ( 2013 ) Survey of heavy metal (Copper, Iron, Lead, Cadmium, Zinc and Nickel) concentrations and their effects on the water quality of Anzali wetland , Caspian Journal of Environmental Sciences,, 11, 11-18. Sprague, J. B (1969) Measurement of pollution toxicity to fish: I bioassay method for acute toxicity. Water Resource, 3(11): 792-821. Tuurala, H. and Soivio, A (1982) Structural and circulatory changes in the secondary lamellae of Salmo gairdnerigills to dehydioabietic acid and zinc. Aquatic Toxicology, 2: 21-29. Witeska, M. and Jezierska, B (2003) The effecte of environmental factors on metal toxicity to fish. Fresenius Environmental Bulletin 824- 829. Wong, M.H., Luk, K.C. and Choi, K.Y (1977) The effects of zinc and copper salts on Cyprinus carpio and Ctenopharyngodon idellus. Acta Anatomica, 99 (4): 450-454.