Effect of Magnetotron on the Rates of Growth and Fecundity in Ostracoda Cyprislaevis O.F Müller,1776 under the Laboratory Conditions

The magneototron technique considers as recent and advanced techniques in magnetic water treatment, which application in different; ecological, agricultures, industrial, medical and scientific fields. therefore this study making to determine the effects of magnetotron system with different intensities 0.05,0.10 and 0.15 tesla on some biological aspects for one species of freshwater ostracoda cyprislaevis o.f. müller, 1776 for economical important, because both juveniles and adults of fishes feeding on it and as a tool for water cleaning, which consideration feeding on dead and decay animals and vegetables the samples of ostracoda were collected from al-jaesh canal- baghdad province for period from 1/9/2012 to 1/11/2012.the obtained results compared with this species of ostracoda which lived in raw water (unexposed to magnetotron system).the present study demonstrated increased significance the rates of growth by increased the bivalve carapace dimensions (length and width) for both ostracodean males and females with increased intensity of magnetotron system comparative with untreated water. although increase significant observed in fecundity in ostracodean females by increase the number and diameter of eggs with increased intensity comported with untreated females. also this study detected to predominant females upon males in both treated and untreated water with magnetotron system. then the magnetotron system does not effect on heterogonous in sexual formation for this species in same ecosystem