Submitted to: Global Aquaculture Advocate
Publication Type: Trade Journal
Publication Acceptance Date: 6/25/2008
Publication Date: 7/1/2008
Citation: Zimba, P.V., Grimm, C.C. 2008. Ultrasound Tested in Channel Catfish Production Systems. Global Aquaculture Advocate. Interpretive Summary: Channel catfish food fish production relies on timely sales of fish –this schedule can be hampered by off-flavor occurrence and fish mortality from disease. Efforts to control off-flavor have used chemical treatments such as diuron, NaCl, hydrogen peroxide, TiO2 and copper-these are effective but can lead to increases in chemically resistant forms in ponds requiring repeated applications that can be labor intensive and increase production cost. Diseases result from presence of bacteria, viruses, and fungi in ponds-typically these forms account for less than 1% of the total pond community. An alternative to these chemical methods is the use of ultrasound. Results from three studies are presented-these results show strong potential for ultrasound use for controlling specific algal groups, reducing bacterial biomass, as well as reducing off-flavor.
Technical Abstract: Data are provided demonstrating application of ultrasound technologies for enhancing water quality in aquaculture systems, including the potential use in hatchery and grow-out ponds. Experiments included demonstration of no-impact on fish growth, reduction of bacterial biomass in tank studies by 60%, as well as ability to change algal composition and density in production ponds.