Abdel-Tawwab, M., Mousa, M. A.A., Ahmad, M. H., Sakr, S. F.M. 2007. The use of calcium pre-exposure as a protective agent against environmental copper toxicity for juvenile Nile tilapia, Oreochromis niloticus (L.). Aquacult. 264 : 236–246.
Abernathy, M. A. 2004. Effect of water hardness on the survival of rainbow sharkminnow (Epalzeorhynchos frenatum) eggs and larvae. Thesis submitted in fulfillment of the requirements for the degree of Master of Science. University of Florida. Pp : 63.
Barrett, K. J., Mc Donald, D. G., O, Donnell, M. J. 2001. Changes in ion content and transport during development of embryonic rainbow trout. J. Fish Biol. 59: 1323-1335.
Bigveld, M. J. C., Van Der Velden, J. A., Kolar, Z., Flik, G. 1998. Magnesium transport in freshwater teleost. J. Exp. Biol. 201: 1981-1990.
Brown, D. J. A., Lynam, S. 1981. The effect of sodium and calcium concentration on the hatching of eggs and the survival of the yolk sac fry of brown trout, salmo trutta L. at low pH. J. Fish Biol. 19: 205-211.
Depeche, J., Billard, R. 1994. Embryonic in fish a review. Society France Ichthyology, Paris. Pp: 123.
Geertz Hansen, P. and Rasmussen, G. 1994. Influence of ochre and acidification on the survival and hatching of brown trout eggs (Salmo trutta). In: Muller, R. and Lloyd, R. (eds). Chronic effects of pollutants on freshwater fish. FAO-Fishing New Books, Cambridge, Pp: 317.
Hagiwara, S., Jeffe, L. 1979. Electrical properties of egg cell membrane. J. Biophys. 8: 385-416.
Hayes, F. R., Darcy, D. A., Sullivan, C. M. 1946. Changes in the inorganic constituents of developing salmon eggs. J. Biol. Chem. 163: 621-631.
Hubbard, M. 2005. Integrated sub-lethal biomarker responses to aqueous copper exposure in the mozambique tilapia, Oreochromis mossambicus. Thesis submitted in fulfillment of the requirements for the degree of Philosophy Doctor. Faculty of Science, University of Johannesburg. Pp: 306.
Hwang, P. P., Tsai, Y. N., Tung, Y. C. 1994. Calcium balance in embryos and larvae of the freshwater-adapted teleost, Orechromis mossambicus. J. Fish Physiol. Biochem. 13: 325-333.
Ketola, G. H., Longacre, D., Greulich, A., Phetterplace, L., Lashomb, R. 1988. High calcium concentration in water increases mortality of salmon and trout eggs. Prog. Fish-Cult. 50: 129-135.
Lonning, S., Kjorsvik, E. 1984. The hardening process of the egg chorion of the cod, Gadus morhua L., and lumpsucker, Cyclopterus lumpus L. J. Fish Biol. 24: 505-522.
Lucu, C. and Obersnel, V. 1996. Cadmium influx across isolated Carcinus gill epithelium: interaction of lanthanum and calcium with cadmium influxes. J. Comp. Physiol. B. 166: 184–189.
Mackareth, F. J. H., Heron, J., Talling, J. F. 1978. Water analysis: some revised methods for limnologist. Freshwater Biological Association Sci. Pul. 36. Freshwater Biological Association. U.K. Pp:119.
Maetz, J. 1974. Aspect of adaption to hypo-osmotic and hyper-osmotic environment. In: Malins, D. C., Sargent, J. R (eds). Biochemichal and Biophysical Perspectives in Marine Biology.1. Academic Press, London. Pp: 1-165.
Matsuo, A. Y., Val, A. L. 2002. Low pH and calcium effects on net Na+ and K+ fluxes in two cat fish species from the Amazon River (Corydoras:Callichthyidae). Braz. J. Med. Biol. Res. 35: 361-367.
Matsuo, A.,Y. O., Wood, C. M., Val, A. L. 2005. Effects of copper and cadmium on ion transport and gill metal binding in the Amazonian teleost tambaqui (Colossoma macropomum) in extremely soft water. Aquat. Toxicol. 74: 351–364.
Moopam, M. 1983. Manaul of Oceanographic Observation and Pollution Analysis. Regional Organization for the Protection of Marine Environment (ROPME).
Poxton, M. G. 1991. Incubation of salmon eggs and rearing of alevins. Aquacult. Eng. 10: 30-35.
Spade, S., Bristow, B. 1999. Effects of increasing water hardness on egg diameter and hatch rates of striped bass eggs. N. Am. J. Aquacult. 61: 263- 265.
Spear, P. A. and Pierce, R. C. 1979. Copper in the aquatic environment: chemistry, distribution, and toxicology. National Research Council of Canada, Environmental Secretariat Publication. No.16454, Ottawa, Ontario. Pp: 227.
Stubblefield, W. A., Brinkman, S. F., Davies, P. H., Garrison, T. D., Hockett, J. R., McIntyre, M. W. 1996. Effects of water hardness on the toxicity of manganese to developing brown trout (salmo trutta). Environ. Toxicol. Chem. 16(10): 8.
Van der velden, J. A., Spaning, F. A., Bongu, S. E. 1991. Early stages of carp (Cyprinus carpio) depend on ambient for their development. J. Exp. Biol. 191: 37-58.
Yamagami, K., Hamazaki, T. S., Yasumasu, S., Masuda, K., Iuchi, I. 1992. Molecular and cellular basis of formation, hardening and breakdown of the egg envelope in fish. Int. Rev. Cytol. 136: 51–92.
Zia, S., Mc Donald, D. G. 1994. Role of the gills and gill chloride cells in metal uptake in the freshwater-adapted rainbow trout, Oncorhynchus mykiss. Can. J. Fish Aquat. Sci. 51: 2482-2492.
