Means and significance levels (p value) obtained from statistical analysis of the effect of sources of variation on stress protein in worker bees.

As a result of the effect of various sources in worker bees, stress protein averages from lowest to highest MSP: 9.53 ± 0.71, Control: 12.95 ± 0.71, SS: 14.46 ± 0.71, HS:16.15 ± 0.71 and P= 0.001. Nutritional supplementation with MSP also resulted in a significantly lower level of stress protein in worker bees compared to other groups. Feeding groups were defined by abbreviations (MSP: Mixed Spring Pollen, HS: Honey Syrup, SS: Sugar Syrup, Control: Control). a, b, c:The difference between the group means indicated with different letters within each feeding group is significant (p<0.05).