Conventional therapeutic treatments on the control of the parasite Ichthyophtirius multifiliis in Rhamdia quelen

Abstract

The objective of this work was to test the efficiency of conventional treatments to control ich infection in "jundiá" (Rhamdia quelen) fingerlings. Twenty fish (3–6 cm) were placed in 28 aquaria (10 L) for 192 hours, and submitted to the following treatments: control, formalin (0.2 mL L^-1), potassium permanganate (1.3 mg L^-1), copper sulfate (0.63 mg L^-1), common salt (10 g L^-1), malachite green (0.05 mg L^-1) and temperature elevation (32°C). Copper sulfate, common salt and the elevation of temperature reduced the number of parasites in "jundiá". These treatments can substitute malachite green to control ich in this species.