Comparison of Ectoparasites Infestation for Fresh and Saltwater Fishes from Euphrates, and Razzaza Lake, Iraq (original) (raw)

Parasitic infestations represent one of the main challenges to freshwater and marine fish in all areas of the world. The infections are commonly found on the skin and gills of fish and can cause dangerous problems, as mortality, in heavily parasitized infections. This study was conducted to detect of ectoparasite types in fishes, 200 of Coptodon zillii from Euphrates and 120 Cyprinus carpio from Razzaza Lake, was used for this studying aquatic environment. The samples were obtained from the market by purchasing fish caught using gill nets in different periods in 2022-2023. After the macroscopic examination of the fish brought to the laboratory alive, native preparations prepared from the skin, gills and eyes were examined under a light microscope. The results of the both infected fishes revealed the presence of several clinical signs. The prevalence was 65.6%, in Coptodon zillii was 60% and Cyprinus carpio was 100%. Indeed, we observed the appearance of necrotic areas, ulcerations and hemorrhage on the gills. On other body parts, we found protozoan and monogenean parasites. The identification of ectoparasite was obtained in fins, skin, and gills and no infection in the eyes. Coptodon zillii were infected with 4 types of ectoparasites, Trichodina spp., Ichthyophthirius multifiliis spp., Dactylogyrus spp., and Gyrodactylus spp. Cyprinus carpio was infected by 2 types of parasites, I. multifiliis and Gyrodactylus spp. significant of results at P≤0.05 of fish type with weight and long but not significant for genders in both types. In future studies should be focusing on modern tools to the identification of parasite species in different environments.