The Effect of Water Temperature on Argulus foliaceus L. 1758 (Crustacea; Branchiura) on Different Fish Species

Parasites belonging to Argulus genus, known as fish louse (Argulus foliaceus L.) significantly affect in negative way both in natural and farming environment. In this study, the pathogenic effect of fish louse temperature on fish depending on water was investigated. In this research to estimate the effects of several factors such as water temperature, gender of the fish and the infection of fish louse were studied through Poisson regression method. As fish species, Alburnus alburnus (bleak), Carassius carassius (crucian carp) and Carassius auratus (golden carp) were caught periodically, starting from May during the year, and the parasites were counted. The gender and metrical measures of the examined fish were categorized separately. The degrees of water temperature of the dam were measured. Results from Poisson regression analysis showed that fish louse has harmful effect on the mentioned fish, depending on the water temperature.