Trematodes (Plathelminthes) of Clarias gariepinus (Pisces: Clariidae) in Lake Tana, Ethiopia

All of the 166 Clarias gariepinus catfishes in Lake Tana, Ethiopia, were examined for trematode infestation in 2006-2009. Seven trematode species-Eumasenia bangweulensis, Astiotrema reniferum, Orientocreadium batrachoides, Paralecithodendrium chilostomum, Phyllodistomum bavuri, P. tana, and Cladorchiidae gen. sp.-as adult were found. The common catfish parasites were Eumasenia bangweulensis (20% prevalence and 1-62 intensity of invasion), Orientocreadium batrachoides (30% prevalence and 1-31 intensity of invasion), Phyllodistomum bavuri (24.8% prevalence and 1-8 intensity of invasion), Ph. tana (17.6% prevalence and 1-23 intensity of invasion), and Ph. bavuri. Astiotrema reniferum (three specimens were only found) was a rare species; Paralecithodendrium chilostomum was an accidental parasite of catfish. All these trematodes were first recorded in Ethiopia and Eastern Africa.