I am currently managing freshwater ponds at northern part of Bangladesh and encountering intense harmful red blooms of Euglena. These blooms are negatively impacting water quality and fish health. I would greatly appreciate insights into innovative technologies or control measures that have shown proven results in mitigating such blooms. Specifically, are there any effective chemical treatments, biological agents, or alternative methods with minimal environmental impact that have been tested successfully? I am also interested in hearing about any long-term management strategies or novel research in this area.
Dear Atique Ashab.
It would be very helpful if you could share with us what species of fish you produce. Based on the photos you share, I can guess that you possibly produce tilapia (Oreochromis), since with this we would have a horizon of possible solutions.
If what you produce is tilapia, you could read about the production of this organism with biofloc technology. There are various works that detail how this biotechnology helps to maintain a balance in production systems between microorganisms and water quality, in addition to functioning as a mechanism for generating feed in situ that is rich in proteins and helps, among other things, to save pelleted feed (approximately 20% savings in this area) and greater size homogeneity (especially in early stages).
You can start by reading introductory materials to understand the qualities and functions of this biotechnology, which you can download from the following links:
Article Biofloc technology. A practical guide book. The World Aquacu...
Book Biofloc Technology – A Practical Guide Book
Chapter Calidad del agua para el cultivo de tilapia roja (Oreochromi...
I hope this first contact is helpful for your question.
Regards.
JC_Dorantes
Controlling harmful Euglena red blooms in freshwater ponds involves a few innovative solutions and control measures. Implementing aeration techniques can help increase oxygen levels, thus reducing the severity of blooms. Regular monitoring of nutrient levels is crucial, as over-fertilization often exacerbates the problem. Additionally, the introduction of biocontrol agents, like certain bacteria or other microorganisms, can naturally inhibit Euglena growth. Physical removal through filtration systems or manual harvesting is also an effective method to mitigate blooms
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