Figure 6 from: Ali H, Alqarni AS, Iqbal J, Owayss AA, Raweh HS, Smith BH (2019) Effect of season and behavioral activity on the hypopharyngeal glands of three honey bee Apis mellifera L. races under stressful climatic conditions of central Saudi Arabia. Journal of Hymenoptera Research 68: 85-101. https://doi.org/10.3897/jhr.68.29678

Figure 6 - Comparisons between nurse and forager bees in the accumulation of lipofuscin in hypopharyngeal glands. A summer bees B winter bees. Asterisks (*) in the graph represent significant differences between the groups (LSD test at p ≤ 0.05).