Abstract
This study was conducted to estimate the prevalence, mean abundance, and mean intensity of Haemogregarina infection on Sawrow fish (Trachurus mediterraneus) from Zliten coast, Libya. A total of 12 specimens of Sawrow fish species were collected randomly, the length (19.23 ± 0.72cm) and the weight (110.25 ± 7.88 g). The fish were transported immediately alive to the laboratory in the Department of Fish Biology and Fish Culture, College of Marine Resources, Asmarya University, where they were maintained alive in well aerated glass aquaria (1x2x4 m). The gills, fins, and skin were examined for ectoparasitic protozoa using a light microscope. The results showed positive effect of haemogregarina in the Sawrow. Blood recorded the highest prevalence and abundance among all the other organs in Sawrow fish followed by kideny, liver and spleen respectively. The results provide a significant difference at (p<0.01), and the results were discussed with other studies in the haemogregarinidae.
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