Study of infection of external parasites of fish cyprinus carpio covered infloating cages on the river euphrates-dhi Qar c

الملخص EN

Morbidity rate with severity of infection was recorded in 405 carp fish, 124 in the firststation, 143 in the station and 138 in the third station in the fish laboratory in college ofAgriculture, theqar university, The results revealed presence of 14 type of externalparasites, tow types of them are recorded at the first time in carp fish in Iraq asahost for which, included asingle type of protozoa which carry cilia (Ichthyophthirius multifiliis Fouquet, 1876).

the study recorded 13 type of monogenodea of single origin and it was noticed appositiverelationship between water temperature and the increased of morbidity rate and severity ofinfection by some external parasite but there was a reverse relation between the increasedconcentration of dissolved salts and morbidity and severity of infection with parasites and it wassignificant1(p<0.01)1during1the1studied1period.