| Popis: |
Parasite-related disease outbreaks in intensive fish culture are becoming a serious problem in Asia. The fish-farming industry needs proper parasite-treatment and control methods in order to be economically viable. Formalin, malachite green, dipterex and fresh water were tested for their effectiveness in removing monogeneans from heavily infected cage-cultured golden snapper ( Lutjanus johni ) gills. Treatment was carried out in glass aquaria using a 30-min short bath with aeration utilizing 10 fish in each test concentration. Formalin significantly reduced Haliotrema johni (48%) and Haliotrema sp. (78%) at 300 ppm. Fresh water was effective in reducing Haliotrema sp. by 91%. Other chemicals (dipterex and malachite green) were not effective. However, formalin at 300 ppm, and fresh water affected the fish towards the end of the 30-min experimental period. |
