Changes in the whole body mineral concentration of the Rainbow trout (Oncorchynchus mykissWalbaum) yolk-sac fry exposed to various combinations of aluminium and calcium concentrations in two different acidic water

Authors : Metin ÇALTA

Pages : 293-298

View : 25 | Download : 12

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The effects of 12 combinations of pH insert ignore into journalissuearticles values(4.5 and 7.0);, aluminium insert ignore into journalissuearticles values(4 and 8 ?mol/L); and calcium insert ignore into journalissuearticles values(10 and 100 mmol/L); on survival and body mineral insert ignore into journalissuearticles values(Ca, Mg, K and Na); concentrations of rainbow trout insert ignore into journalissuearticles values( Oncorhynchus mykissWalbaum); at the yolk-sac stage were investigated. Mortality was low insert ignore into journalissuearticles values(< 17%); in most combinations and increased insert ignore into journalissuearticles values(> 27%); in the presence of aluminium and low pH insert ignore into journalissuearticles values(4.5);. Aluminium insert ignore into journalissuearticles values(4 and 8 ?mol/L); impaired larval development, net uptake of calcium, potassium and sodium, and slightly increased the net loss of magnesium. It was found that these effects of aluminium were more severe at low calcium concentration insert ignore into journalissuearticles values(10 ?mol/L); and low pH insert ignore into journalissuearticles values(4.5); than at high calcium concentration insert ignore into journalissuearticles values(100 ?mol/L); and high pH insert ignore into journalissuearticles values(7.0);. In the absence of aluminium, only the combination of low pH insert ignore into journalissuearticles values(4.5); and low calcium insert ignore into journalissuearticles values(10 ?mol/L); significantly reduced body mineral concentrations.
Keywords : Aluminium, pH, calcium, rainbow trout, Oncorhynchus mykiss, body mineral concentration