Study the relationship between th length of the fish and the incidence external parasites of common carp Cyprinus carpio in the AL-Shark AL-Awsat Fish Farm in Babylon Province

Abstract

ABSTRACT Examined atotal of 305 Cyprinus carpio from The AL-Shark AL-Awsat fish farm in Babylon province during the period from April 2011 till November 2011 for ectoparasitic infiction fauna. The inspection results showed the occurrence of nine species of ectoparasites which included of Ichthyophthirius multifiliis, Trichodina cotidarum, T. nigra, Haemogregarina sp., Emeria mylopharygnyodon, Dactylogyrus Vastator, D. simplex, D. proprnquus and D. arcuatus, The Cyprinus carpio incousidered as anew host in Iraq for Haemogregarina SP. fish infection with these parasites increased with increasing fish length (age).