Acini sizes (length, width, and surface area) of nurse and forager bees. A A. m. jemenitica B A. m. carnica C A. m. ligustica. Nurse bees (summer & winter) had significantly larger acini than forager (summer & winter) bees in the three races. Asterisks (*) in the graphs represent the significant differences between the groups (LSD test at p ≤ 0.05).

  Part of: 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.