The biomass production, chlorophyll a, protein contents was varied with temperature, pH and salinity for all the species tested in the present study. There was an increase in biomass production, chlorophyll a, protein contents with increasing temperature. In most of the species, the maximum biomass was obtained at 30 - 400C and minimum at 10- 200C and 500C. The maximum biomass, chlorophyll a and protein content was obtained at pH 9 and 10, while the pH of 7, 8 and 11 showed minimum production of biomass, chlorophyll a and protein contents in almost all the species. Regarding salinity the maximum biomass was obtained at 30 – 40 ppt and minimum in 10, 20 and 50 ppt.
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