a positive trendp = 0.07
In Flock-A, PAR had a significant negative correlation with the use by the hens of the 50% UV-filtering shelter ( p < 0.0001) showing the greatest contributory effect (64.86% variation, Table 2 ) in the model, and a positive trend for the 90% shelters ( p = 0.07) but no association with use of the 70% UV-filtering shelters ( Figure 9 ).