The presence of sunlight or solar radiation was found to be important factor for considering the effect of copper and cadmium on the survival of penaeid shrimp. The survival rate was inversely proportional to the intensity of light at each larval stage of penaeid shrimp. The effect of solar radiation on the uptake of copper and cadmium was expressed by linear regression. The coefficient of regression was used to determine the effect of solar radiation on uptake of copper and cadmium.The temperature of the experimental chamber also increased, during the day at 12.00h. Showing that the sunlight may have acted synergistically with temperature for permeability of Cu and Cd. The LC50 value was calculated at each larval stage for copper and cadmium separately.
A B MUNSHI ,Y Q SU ,S J LI ,
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