Journal
AQUACULTURE
Volume 577, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.aquaculture.2023.739932
Keywords
Aquaculture; Harmful algal bloom; Pond water; Hydrogen peroxide
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This study found that applying hydrogen peroxide (7 mg/L) could effectively reduce the population of Microcystis sp. in both laboratory and pond trials, without affecting other algal species. The treatment also promoted the growth of beneficial algae. Additionally, it was observed that the gill status of Tilapia and Giant tiger prawn remained unaffected by the H2O2 treatment, suggesting its potential as a mitigation strategy for cyanobacteria in pond aquaculture.
Microcystis sp. is a harmful cyanobacterial species commonly seen in earthen ponds. The overgrowth of these algae can lead to fluctuations in water parameters, including DO and pH. Also, the microcystins produced by these algae are toxic to aquatic animals. This study applied hydrogen peroxide (7 mg/L) to treat Microcystis sp. in a laboratory setting and in three earthen pond trials. In the lab we observed a 64.7% decline in Microcystis sp. And in our earthen pond field experiments we measured, on average, 43% reductions in Microcystis sp. cell counts within one hour. The treatment was found to eliminate specifically Microcystis sp. and did not reduce the cell count of the other algae species in the pond. A shift of the algae community towards the beneficial algae was also found post-treatment. Lastly, during the pond trials, the gill status of Tilapia and Giant tiger prawn were not affected by the H2O2 treatment suggesting this may be a good mitigation strategy for reducing cyanobacteria in pond aquaculture.
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