Influence of exposure of CrCl3 in Aquatic Environment on Biology of Ostracoda Crustacean" Eucypris".


The paper deals with problem of presented of Cr3 element with CrlCl3) form in aquatic ecosystem on individuals of freshwater Ostracoda crustacean. This was done by examining its Biological & Toxical effecting for individuals of Cyclocypris. The concentrations of chromium chloride used in experiment were (0.05. 1, 1.5, 2 & 3 mg/l).They were applied to Juveniles and adults of these organisms. Tests were performed to assess the survival period, fertility, and body structure and mortality percentage rate. The result showed that there are serious effects for all levels of concentrations used in this study. It is started from 0.05 & 1 mg/l through marked effect on the youngsters and adults of Cyclocypris during 24 and 72 hours, and when the concentration has been increased to (1.5, 2 & 3 mg/l) the effect was prepared during 6 on the youngsters and 12 - 24 hours 0n adults respectively. When the mortality rate measured the results showed that Individuals of Cyclocypris recommended 100% percentage at 12, 24 & 48 in Juveniles and 24, 48 & 72 hours in adults, after administration. Also the results prepared that the chromium element had possibility to change the pH of water from 7.8 to 5.4 .That which lead to toxics effect lest on the body structure no also on the level of basic food of these crustacean.