Abstract
The environmental changes in the animal’s body status could manifest as a physiological response. The present study investigated the impact of body condition, microclimate, wind speed, and air pollutants on the physiological response of laying hens. Therefore, a total of 172 laying hens at 16 weeks of age from Isa Brown were investigated for 5 days. Data on body condition, microclimate, wind speed, and physiological response were recorded and then analyzed using the SEM model by Partial Least Square- Structural Equation Modeling using smartPLS. The obtained result revealed that 59.71% of the physiological response of the chickens (respiratory rate and rectal temperature) reared at the open house system could be predicted by the independent. The microclimate (y = 0.465) was found to be more effective than body condition (y = 0.237), wind speed (y = -0.364), and air pollutant (y = 0.08). Moreover, it was found that as much as 83.1% of the air pollutants in the open house system could be predicted by the independent variables, and wind speed (y = -0.890) was more effective than microclimate (y = 0.074) variables.
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