Efficacy of Hydrogen Peroxide in Controlling Mortality Associated with External Columnaris on Walleye and Channel Catfish Fingerlings
J.J. Rach, S.M. Schleis, M. Gaikowski, A.
Johnson-2003
North American Journal of Aquaculture, 65(4):
300–305
Abstract:
The efficacy of hydrogen peroxide in controlling
mortality associated with external columnaris infections on walleye Sander
vitreus (formerly Stizostedion
vitreum) and channel catfish Ictalurus
punctatus fingerlings was evaluated in two on-site trials.
Microscopic examination of skin scrapes before treatment confirmed the
presence of bacteria indicative of columnaris disease. In separate trials,
walleyes (12 g) and channel catfish (2.3 g) were exposed to a total of three
every-other-day hydrogen peroxide treatments of 0, 50, 75, or 100 mg/L for
60 min. Each treatment regimen was tested in triplicate, and each replicate
contained 13 walleyes or 26 channel catfish. Hydrogen peroxide exposures of
50 mg/L for 60 min significantly increased walleye survival relative to that
at other treatment concentrations, including the controls. Exposures of 50,
75, or 100 mg/L of hydrogen peroxide for 60 min significantly increased
channel catfish survival in comparison with that of controls. These trials
indicated that hydrogen peroxide treatments effectively reduce mortality in
walleyes and channel catfish infected with external columnaris.