Comparison of ozone,hydrogen peroxide and removal of infected eggs for prevention of fungal infection in sturgeon hatchery |
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Authors: | Mohammad R Ghomi Abbas Esmaili Gholamhosein Vossoughi Amin Keyvan Rajab M Nazari |
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Affiliation: | Department of Fisheries &Environment, Islamic Azad University of Tonekabon, Tonekabon,;Department of Natural Resources, University of Tarbiatmodarres, Noor,;Department of Veterinary Medicine, University of Tehran, Tehran,;Department of Fisheries Science, Science and Research Campus, Islamic Azad University of Tehran, Tehran, and;Department of Fisheries &Environment, University of Mazandaran, Sari, Iran |
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Abstract: | ABSTRACT: The objective of this study was to evaluate the effects of ozone, hydrogen peroxide and removal of infected eggs (five times per day) on prevention of fungal infection on Iranian sturgeon Acipenser persicus . The effects of 0.05, 0.1 and 0.15 p.p.m. of ozone, and 500 and 1000 p.p.m. of hydrogen peroxide in two different egg disinfection procedures (with and without removal of infected eggs) were examined on hatching ratio. Egg disinfection by 1000 p.p.m. hydrogen peroxide (with removal of infected eggs) resulted in the greatest hatching ratio (78%) among all treatments. Among ozone treatments, 0.15 p.p.m. (with removal of infected eggs) showed the highest hatching ratio (76.4%). The hatching ratio of the control group (without disinfectant and removal of infected eggs) was 34.4%. Removal of infected eggs increased the hatching ratio by 16.1% compared to treatments without infected egg removal, and there was a significant difference ( P < 0.01). Ozone is preferred to hydrogen peroxide because a lower concentration of ozone is required to disinfect the culture medium; consequently, environmental pollution will be decreased. A low correlation ( r = −0.35) was observed between hatchery water temperature and fungal infection percentage in the control. |
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Keywords: | fungal infection hatching ratio hydrogen peroxide ozone removal of infected eggs sturgeon hatchery |
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