A new study sheds light on how the stinger of a western honey bee is a potent defense mechanism that can be deadly for the bee itself. The research, recently published in the Proceedings of the National Academy of Sciences, utilized high-speed cameras to capture the intricate details of bee stingers in action.
Lead author Fiorella Ramirez Esquivel, a postdoctoral researcher at Macquarie University in Australia, emphasized the importance of modern camera technology in observing the bees’ behavior. By recording at hundreds of frames per second, the researchers were able to capture the rapid stinging process, aided by the translucent nature of the bee’s venom sac and stinger.
The study involved experiments with live honey bees, where researchers removed the stingers and promptly euthanized the bees due to the limited active duration of the stinger once detached. Ramirez Esquivel highlighted the precision required in inserting the stinger into an artificial skin substitute within a narrow space.
The findings revealed a unique double-piston design in the bee’s stinger, where specialized valves facilitate both deeper penetration and continuous venom delivery. This complex mechanism, likened to a piston system, was further analyzed using 3D printing to simulate the intricate movements of the valves.
Juliana Rangel, an apiculture professor at Texas A&M University, expressed fascination with the study’s visual insights, surpassing traditional microscopy images. The study also uncovered that the stinger’s twitching movements can persist for up to 15 minutes after deployment.
The defense strategy of sacrificing part of its body, known as autotomy, serves a crucial role for the western honey bee in protecting its colony, described as a “superorganism.” The stinger’s barbs and venom release not only deter threats but also attract fellow bees to join in defending the hive.
While the study focused on the European-native western honey bee, researchers pondered the evolutionary implications for other honey-producing bee species. The intricate workings of bee stingers, as elucidated in this research, could potentially offer valuable insights for medical applications in the future.