Correlated Parameters Correlation Coefficients   Experimental Pullets (n = 25) Control (n = 25) Dry-bulb Temperature and Cloacal Temperature 0.559* 0.477* Hour of Day and Cloacal Temperature -0.796* 0.850* Hour of Day and Maximum Cloacal Temperature 0.832*** 0.806*** Hour of Day and Minimum Cloacal Temperature 0.946*** 0.887*** Hour of Day and Range Cloacal Temperature - 0.902*** - 0.590* Maximum and Minimum Cloacal Temperature 0.951*** 0.897*** Maximum and Range Cloacal Temperature -0.873*** 0.364NS Minimum and Range Cloacal Temperature -0.939*** - 0.732**

* = Significant (P < 0.05) correlation; ** = Highly significant (P < 0.01) correlation; *** = Very highly significant (P < 0.001) correlation; NS = Non-significant correlation

Table 6: Relationships between Hour of Day and Parameters of Cloacal Temperature in Experimental and Control Pullets during the Study Period.