Diurnal changes of dissolved oxygen in fouling land-based tanks for rearing of sea bass |
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| Authors: | Mladen Tudor |
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| Institution: | Institute of Oceanography and Fisheries, PO Box 500, 21000 Split, Croatia |
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| Abstract: | Concentration of dissolved oxygen (DO) was measured in non-fouling tanks with sea bass and in fouling tanks without fish. The rate of oxygen production and respiration of fouling organisms and the rate of oxygen consumption by sea bass were calculated from the changes of DO. It was possible to approximate diurnal changes of these rates as periodical functions of time. A mathematical model was used to study the effects of fouling, density of fish and water flow on DO during the day (0–24 h). During the sunlight the fouling increases DO in the tank, while during the night it does not affect DO significantly. Water detention time significantly affects the minimum values of DO, and relatively little the maximum ones during the day. |
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| Keywords: | Rearing tank Fouling Dissolved oxygen Model Sea bass |
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