Infection with trematode parasites can lead to severe change in nutrient content and may result in host mortalities and character of a water body may influence the parasitic fauna. Hence a study was carried out from 2010 to 2011 to find out a correlation of water’s physic-chemical characteristics and trematode parasites of Channa punctata (Bloch) in Awangsoi Lake, Manipur, India. During the present investigation three species of trematodes were recorded. In the present study there were concurrent infections by two or more parasite species. The percentage of infection was positively correlated with temperature, pH, DO and conductivity in Awangsoi Lake. There was a significant positive correlation (r = 0.652; p<0.05) with FCO2 and a negative correlation with alkalinity. Seasonal variation in the occurrence of these parasites may be attributed to ecological conditions, particularly distribution of intermediate hosts and also the age of the host and the life cycle of the parasite species.
Awangsoi Lake, Channa punctata, Physico-chemical parameters, Trematodes
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