An ecological study on digenetic trematode parasite of Channa punctatus of Lucknow, Uttar Pradesh

Channa punctatus is one of the common freshwater fish species of Uttar Pradesh abundantly found in river Gomti, different ponds and canals of Lucknow. This fish species carry heavy infection of helminth parasites and serve as thehost of different helminth parasites. Infection of these parasites may be result in poor growth, postpone sexual maturity and mortality of fishes, and cause human and animal diseases. Digenean trematodes are important helminth parasites of Channa punctatus. In this paper wehave reported the seasonal changes in prevalence, intensity and relative density patterns of digenean infection in Channapunctatus during the October 2007 to September 2008.