Location: Harry K. Dupree Stuttgart National Aquaculture Research CntrTitle: Controlling fungus on channel catfish eggs with peracetic acid
|Straus, David - Dave|
|MEINELT, THOMAS - Leibniz Institute Of Freshwater Ecology And Inland Fisheries|
Submitted to: International Conference on Recirculating Aquaculture
Publication Type: Abstract Only
Publication Acceptance Date: 4/29/2016
Publication Date: 8/19/2016
Citation: Straus, D.L., Meinelt, T. 2016. Controlling fungus on channel catfish eggs with peracetic acid [abstract]. 11th International Conference on Recirculating Aquaculture, August 19-21, 2016, Roanoke, Virginia. 2p.
Technical Abstract: There is much interest in the use of peracetic acid (PAA) to treat pathogens in aquaculture. It is a relatively new compound and is approved for use in Europe, but not in the United States. This study determined the effectiveness of PAA for fungus control on channel catfish Ictalurus punctatus eggs. The study consisted of five PAA concentrations (2.5, 5, 10, 15 and 20 mg/L) and an untreated control in a flow-through system. A single spawn was used for each replication (N=4). Eggs were treated twice daily until the embryos developed eyes. When hatching was complete for all viable eggs, fry were counted to determine the percent survival in each treatment. Fungal growth was severe in the untreated controls resulting in 11% survival. Treatments of 2.5, 5 and 10 mg/L PAA were significantly different from the controls (P < 0.05). The highest percent survival of hatched fry, was 5 mg/L PAA administered twice daily; the 2.5 mg/L PAA treatment had slightly less survival, but gives a higher margin of safety in case of treatment error. Very little fungus was present in treatments receiving 2.5 mg/L PAA or higher, and concentrations of 15 and 20 mg/L PAA were toxic to the eggs. The mean survival in the 0, 2.5, 5, 10, 15 and 20 mg/L PAA treatments were 11, 60, 63, 62, 32 and 0%, respectively. Therefore, PAA may be a novel compound which merits further investigations regarding its use in U.S. aquaculture.