{"id":15542,"date":"2020-07-13T23:32:35","date_gmt":"2020-07-13T21:32:35","guid":{"rendered":"http:\/\/fishconsult.org\/?p=15542"},"modified":"2020-07-13T23:32:37","modified_gmt":"2020-07-13T21:32:37","slug":"supersaturation-of-dissolved-oxygen-in-fish-ponds","status":"publish","type":"post","link":"https:\/\/fishconsult.org\/?p=15542","title":{"rendered":"Supersaturation of dissolved oxygen in fish ponds"},"content":{"rendered":"\n

Photo credit: <\/strong>Samy Ndala (Congo DR) Review:<\/strong> Abdel Rahman El Gamal (Founder of the website) <\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

The supersaturation of dissolved\noxygen (DO) is often observed near the surface of water bodies as a result of\nthe strong the photosynthetic activity resulting from phytoplankton abundance.\nThis occurs during bright sunlit days in eutrophic water bodies such as rivers,\nlakes and\/or fish ponds. The supersaturation of oxygen during daylight is always\nfollowed by much lower oxygen levels at night when the photosynthesis ceases\nwhile the respiration by all living organisms continues.<\/p>\n\n\n\n

For illustration, the dissolved oxygen in the inserted photo\nreads 14.8 mg\/l which is much higher that the saturation levels of dissolved\noxygen. For example, the 100% DO saturation is 8.09 mg\/l at water temperature\nof 26\u00b0C and 7.81 mg\/l at 26\u00b0C. This photo was taken during\nAugust in a freshwater fish pond in Egypt where temperature is usually at\nhighest and so the sun light. One can notice the dark green color of pond water\nindicating the abundance of phytoplankton in the water. \n\nIt may\nworth mentioning that in highly productive fish ponds,\nsome DO may be lost to the atmosphere through oxygen supersaturated surface\nwaters.\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"

Photo credit: Samy Ndala (Congo DR) Review: Abdel Rahman El Gamal (Founder of the website) The supersaturation of dissolved oxygen (DO) is often observed near the surface of water bodies as a result of the strong the photosynthetic activity resulting from phytoplankton abundance. This occurs during bright sunlit days in eutrophic water bodies such as … <\/p>\n

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