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Evaluation Of Three Embryo Disinfectants On Hatching Success In Four Freshwater Ornamental Fish Species
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2019
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Source: North Am J Aquaculture, 82: 63-70
[PDF-192.81 KB]
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Journal Title:North American Journal of Aquaculture
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Description:Maintaining optimum conditions for embryo incubation is a critical consideration in finfish aquaculture. To this end, prophylactic disinfectant protocols have been widely used in culture practices for many finfish species. However, empirical evaluations of safety and effectiveness for disinfectants in ornamental fish species are uncommon. We evaluated hatching success in embryos of four ornamental fishes (Redtail Sharkminnow Epalzeorhynchos bicolor, Rainbow Sharkminnow E. frenatum, Featherfin Squeaker Synodontis eupterus, and Blotched Upsidedown Catfish S. nigriventris) after a 15-min immersion in one of three common disinfectant solutions: formalin at 1,500 mg/L, iodine at 100 mg/L, and hydrogen peroxide at 1,000 mg/L. A 15-min immersion in hatching water served as the control. All disinfectants were administered according to either the manufacturer's recommendation or protocols found in published literature for other species. At the tested concentrations, hydrogen peroxide and formalin can be safely used as prophylactic treatments for the majority of species evaluated, with no detrimental effects. In addition, Redtail Sharkminnow embryos treated with formalin exhibited numerically higher hatch success with less variation among replicates than the control treatment. For all species, a 15-min immersion in 100-mg/L iodine resulted in significantly lower hatching success when compared with all other treatments.
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Source:North Am J Aquaculture, 82: 63-70
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Rights Information:Accepted Manuscript
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Compliance:Submitted
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