Al Marzouk, A. (2002). Preliminary study of direct freshwater bath treatment for a parasitic copepod, Caligus antennatus sp.nov. Boxshall and Gurney, infesting cultured yellow-fin porgy, Acanthopagrus latus (Houttuyn) in Kuwait. Journal of Aquaculture in the Tropics 17(1): 1-6.

73242

Al Marzouk, A.

2002

17(1): 1-6.

Publication

Yellow-fin porgy, A. latus, is vulnerable to infestation by parasitic copepod C. antennatus sp.nov. under tank culture conditions. Severe haemorrhages occurred to heavily infested fish, causing high mortalities. Direct freshwater bath treatment was used to eradicate the parasite and to evaluate the stress caused by its application. Heavily infested fish (total 1500 nos.) were transferred directly from three 20 m3 rearing tanks to three new 20 m3 treatment tanks of the same capacity, each filled with 3 m3 of freshwater. Duration of the bath was 45 min. The prevalence of different developmental stages were determined. The treatment was effective in reducing the chalimus stages by 70% and eliminating pre-adult and adult stages. No mortality was observed during the treatment and no stress was observed. This method can be considered as the preferable method for treating yellow-fin porgy in a commercial tank-cultured fish farm.

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