References included in article:

Order of appearence	Full citation	SRCosmos Link
1	Ahern MD, Morris S, 1998, Accumulation of lead and its effects on Na balance in the freshwater crayfish Cherax destructor. J. Exp. Zool., 281: 270-279.
2	Demayo A, Taylor MC, Taylor KW, Hodson PV, 1981, Toxic effects of lead and lead compounds on human health, aquatic life, wildlife plants, and livestock. Critical Reviews in Environmental Control, 12(4): 257-305.
3	Dimitrova MS, Tishinova T, Velcheva V, 1994, Combined effects of zinc and lead on the hepatic superoxide dismutase-catalase system in carp. Comp. Biochem. Physiol., 108C: 43-46.
4	Donaldson EM, 1981, The pituitary-interrenal axis as indicator of stress in fish. In: A. D. Pickering (ed.), Stress and fish. Academic Press, London.
5	Evans DH, Piermarini PM, Potts WTW, 1999, Ionic transport in the fish gill epithelium. J. Exp. Zool., 283: 641-652.
6	Hamilton MA, Russo RC, Thurston RV, 1977, Trimmed Spearman-Karber method, for estimating median lethal concentrations in toxicity bioassays. Environ. Sci. Technol., 11(7): 714-719. Correction, 12(4): 417, 1978.
7	Heath AG, 1987, Water pollution and fish physiology. CRC Press, Boca Raton, Fl.
8	Hinton DE, Baumann PC, Gardner GR, Hawkins WE, Hendricks JD, Murchelano RA, Okihiro MS, 1992, Histopathological biomarkers. In: R.J. Huggett, R.A. Kimerle, P.M. Mehrle-Jr. & H.L. Bergman (eds.), Biomarkers: biochemical, physiological, and histological markers of anthropogenic stress. Lewis Publishers, Boca Raton, Fl.
9	Hodson PV, 1976, ?-amino levulinic acid dehydratase activity of fish blood as an indicator of a harmful exposure to lead. J. Fish. Res. Board Can., 33: 268-271.
10	Hodson PV, Blunt BR, Spry DJ, Austen K, 1977, Evaluation of erythrocyte ?-amino levulinic acid dehydratase activity as a short-term indicator in fish of a harmful exposure to lead. J. Fish. Res. Board Can., 34: 501-508.
11	Hodson PV, Blunt BR, Spry DJ, 1978a, Chronic toxicity of waterborne and dietary lead to rainbow trout (Salmo gairdneri) in lake Ontario water. Water Res., 12: 869-878.
12	Hodson PV, Blunt BR, Spry DJ, 1978b, pH-induced changes in blood lead of lead-exposed rainbow trout (Salmo gairdneri). J. Fish. Res. Board Can., 35: 437-445.
13	Hodson PV, Blunt BR, Jensen D, Morgan S, 1979, Effect of fish age on predicted and observed chronic toxicity of lead to rainbow trout in lake Ontario water. J. Great Lakes Res., 5: 84-89.
14	Hodson PV, Hilton JW, Blunt BR, Slinger SJ, 1980, Effect of dietary ascorbic acid on chronic lead toxicity to young rainbow trout (Salmo gairdneri). Can. J. Fish. Aquat. Sci., 37: 170-176.
15	Hodson PV, Whittle DM, Wong PTS, Borgmann U, Thomas RL, Chau YK, Nriagu JO, Hallet DJ, 1984, Lead contamination of the Great Lakes and its potential effects on aquatic biota. In: J. O. Nriagu & M. S. Simmons (eds.), Toxic contaminants in the Great Lakes. John Wiley and Sons, Indianapolis, In.
16	Jobling M, 1994, Fish bioenergetics. Chapman & Hall, London.
17	Lacher TE, Goldstein MI, 1997, Tropical ecotoxicology: status and needs. Environ. Toxicol. Chem., 16(1): 100-11.
18	Mallat J, 1985, Fish gill structural changes induced by toxicants and other irritants: a statistical review. Can. J. Fish. Aquat. Sci., 42: 630-648.
19	Mayer FL, Versteeg DJ, Mckee MJ, Folmar LC, Graney RL, Mccume DC, Rattner BA, 1992, Physiological and non-specific biomarkers. In: R. J. Huggett, R. A. Kimerle, P.M. Mehrle-Jr. & H.L. Bergman (eds.), Biomarkers: biochemical, physiological, and histological markers of anthropogenic stress. Lewis Publishers, Boca Raton, Fl.
20	Mazon AF, Fernandes MN, 1999, Toxicity and differential tissue accumulation of copper in the tropical freshwater fish, Prochilodus scrofa (Prochilodontidae). Bull. Environ. Contam. Toxicol., 63: 797-804.
21	Mazon AF, Monteiro EAS, Pinheiro GHD, Fernandes MN, 2002, Hematological and physiological changes induced by short-term exposure to copper in the freshwater fish, Prochilodus scrofa. Braz. J. Biol., 62(4A): 621-631.	SRCosmos
22	Mc-Donald DG, Wood CM, 1993, Branchial mechanisms of acclimation to metals in freshwater fish. In: J. C. Rankin & F. B. Jensen (eds.), Fish ecophysiology _ fish and fisheries series 9. Chapman and Hall, London.
23	OLIVEIRA RIBEIRO, C.A., FANTA, E., TURCARATTI, N.M., CARDOSO, R.J. & CARVALHO, C.S., 1996, Lethal effects of inorganic mercury on cells and tissues of Trichomycterus brasiliensis (Pisces, Siluroidei). Biocell, 20: 171-178.
24	OLIVEIRA RIBEIRO, C.A., PELLETIER, E., PFEIFFER, W.C. & ROULEAU, C., 2000, Comparative uptake, bioaccumulation, and gill damages of inorganic mercury in tropical and Nordic freshwater fish. Environ. Research, 83(A): 286-292.
25	Pelgrom SMG, Lock RAC, Balm PHM, & WENDELAAR BONGA, S.E., 1995, Effects of combined waterborne Cd and Cu exposures on ionic composition and plasma cortisol in tilapia, Oreochromis mossambicus. Comp. Biochem. Physiol., 111(c): 227-235.
26	Pickering QH, Henderson P, 1966, The acute toxicity of some heavy metals to different species of warmwater fishes. Int. J. Air Water Pollut., 10: 453-463.
27	Pratap HB, & WENDELAAR BONGA, S.E., 1990 Effects of water-borne cadmium on plasma cortisol and glucose in the cichlid fish Oreochromis mossambicus. Comp. Biochem. Physiol., 95(C): 313-317.
28	Rand GM, Wells PG, Mccarthy LS, 1995, Introduction to aquatic toxicology. In: G. M. Rand (ed.), Fundamentals of aquatic toxicology: effects, environmental fate and risk assessment. 2nd ed. Taylor & Francis, Washington, DC.
29	Randy AS, Monserrat JM, Rodriguez EM, Romano LA, 1996, Histpathological effects of cadmium on the gills of the freshwater fish Macropsobrycon uruguayanae Eigenmann (Pisces, Atherinidae). J. Fish Dis., 19: 311-322.
30	Salmeron-Flores P, Melendez-Camargo ME, Martinez-Tabche L, 1990, Efecto hepatotoxico y nefrotoxico del plomo sobre la tilapia (Sarotherodon aureus). An. Esc. Nac. Cienc. Biol. Mex., 33: 147-156.
31	Schwaiger J, Wanke R, Adam S, Pawert M, Honnen W, Triebskorn R, 1997, The use of histopathological indicators to evaluate contaminant-related stress in fish. J. Aquat. Ecosyst. Stress and Recov., 6(1): 75-86.
32	SEMA, 1988, Manual de testes para avaliacao da ecotoxicidade de agentes quimicos. Secretaria Especial do Meio Ambiente, Brasilia.
33	Thomas P, 1990, Molecular and biochemical responses of fish to stressors and their potential use in environmental monitoring. In: S. M. Adams (ed.), Biological indicators of stress in fish. American Fisheries Society, Bethesda, Maryland.
34	Walker CH, Hopkin SP, Sibly RM, Peakall DB, 1996, Principles of ecotoxicology. Taylor & Francis, London.
35	WENDELAAR BONGA, S.E., 1997, The stress response in fish. Physiol. Rev., 77: 591-625.
36	WHO, 1995, Environmental health criteria 85: Lead — environmental aspects. World Health Organization, Geneva.
37	Yabe MJS, Oliveira EO, 1998, Metais pesados em aguas superficiais como estrategia de caracterizacao de bacias hidrograficas. Quimica Nova, 21: 551-556.
38	Zaia DAM, Obara MM, Rockenbach SR, Barreto WJ, Gaziri LCJ, Zaia CTBV, Lichtig J, 1992, Spectrophotometric determination of total proteins in blood plasma with ??benzoquinone. Braz. J. Med. Biol. Res., 25: 549-555.
39	Zar JH, 1996, Biostatistical analysis. 3rd. ed. Prentice Hall, New Jersey.