استخدام بعض المواد الكيميائية في معالجة القشري مجذافي الاقدام( Ergasilus rostralis , Ergasilus mosulensis )المتطفلة على غلاصم اسماك الخشني Liza abu .

Abstract

Effect of different concentrations of four chemicals ( Sodium chloride , copper sulfate , formalin , Acetic acid ) on two copepod crustacean species ( E. mosulensis , E.rostralis ) infecting the mugilid fish Liza abu ( Heckel ) from Alus region of the Upper Euphrates River in AL-Anbar .The dip method was used to achieve the treatment course . The exposure of the fishes to 2ml/ L formalin for a period range of five minutes was very affective against E. mosulensis ، E. rostralis . The use of 2ml/L acetic acid for one minutes killed 60% of crustaceans , However , it is recommended not to exceed such period . because may be lead to killing of Fishes . Both sodium chloride and copper sulfate were affective against crustaceans only in concentrations harmful to fishes .