Moreover, when comparing treatments differing in temperature, but where the balance between oxygen demand and supply was similar, high temperature increased both growth rate and final size.
Occurrence of potential toxicants in aquatic ecosystem causes a reduction in the quality of the aquatic environment that results in impaired level of dissolved oxygen (DO), pH, temperature, biological oxygen demand, and chemical oxygen demand (Roberts 2001).
Further research is needed to define the fine balance between oxygen demand and delivery for the organ or tissue of interest at relevant temperatures.
Because stressfully-high temperatures in aquatic ectotherms exacerbate the discordance between metabolic oxygen demand and oxygen solubility [ 18– 20], we hypothesize that the observed down-regulation may be the molecular mechanism of metabolic compensatory reaction [ 28] to nearly lethal temperature.
In aquatic organisms high-temperature tolerance is often constrained by the mismatch between metabolic oxygen demand and oxygen availability.
This method also helps in reduction of chemical oxygen demand and biochemical oxygen demand in wastewater.
However, effluents from textile and dyeing have a low biological oxygen demand and strong chemical oxygen demand.
For evaluating the water purification effect, COD (chemical oxygen demand) and biochemical oxygen demand (BOD) were determined.
The water samples were analysed for temperature, pH, salinity, conductivity, total dissolved solids, alkalinity, hardness, turbidity, dissolved oxygen, chloride, nitrite, nitrate, phosphate, sulphate, sodium, ammonium, potassium, total chlorophyll, biochemical oxygen demand and chemical oxygen demand.
This ratio represents the imbalance between oxygen demand and delivery.
