| Summary: | Parasitic Prevalence and Efficacy of Three Treatments on the Growth of Cat Fish Chrysichthys nigrodigitatus (Lacépède 1803) Reared in Fish Ponds in the Southof Ivory Cost. The parasitic prevalence and the efficacy of three anti-parasitic treatments were evaluated in fish ponds. The tested products were lime, Ovaldine-Slice ® and the combination of Pesticide-S®-Pyceze®. Five parasite species were identified during the study. Two monogenes, namely Protoancylodiscoides chrysichthes Paperna, 1969 and Protoancylodiscoides sinonchium Paperna, 1969. Three intestinal parasites including a microsporidie, Pleistophora sp., and two trematodes (Nephrocephalus sessilis Odhner, 1902 and Siphodera ghanensis Fischthal & Thomas, 1968) were found. The highest observed prevalences were found in the treatment without pest control. The observed prevalences were 45.11%, 1.1%, 1.15% and, 1.21% respectively for P. chrysichthes, N. sessilis, Pleistophora sp. and S. ghanensis. The ponds that did not receive a pesticide are characterized by the lowest growth rate (0.76 g/) and survival rate (70%). Ments, the lowest parasitic prevalence and the best zootechnical performances were observed for the combination of Ovaldine-Slice®: final average weight of 497.98 g and, final average length of 377.7 mm. The survival rate (81%), the daily growth (0,94 g/d) and the specific growth rate (2.5 %/d) were the highest while the condition factor was the lowest (1.30) compared to other treatments.
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