A new study has revealed that a balanced diet is crucial for the health and task performance of honeybees. The research shows that an unbalanced diet significantly delays the onset of nursing, reduces nursing frequency, and alters care for larvae. These findings highlight the importance of maintaining a balanced diet for honeybees to ensure their efficiency and survival, especially in cultivated landscapes with limited nutritionally balanced pollen sources.
A new study from the Hebrew University of Jerusalem has revealed that a balanced diet is essential for the optimal health and task performance of honeybees, a key species for pollination and ecosystem stability. The study, led by Prof. Sharoni Shafir from the Robert H. Smith Faculty of Agriculture, Food and Environment, investigates how honeybees balance their nutritional intake to maintain homeostasis and enhance fitness. The findings indicate that an unbalanced diet with a high omega-6:3 ratio (5:1) significantly affects the bees' ability to nurse larvae, delaying the onset of nursing, reducing the frequency of nursing visits, and altering the attention given to larvae of different ages.
To test these effects, one-day-old adult worker bees were fed either a balanced diet or an unbalanced diet for seven days. The bees were then released into a common-garden hive, tagged with barcodes, and continuously filmed for six days. The analysis revealed that those on the unbalanced diet exhibited delayed nursing behavior and reduced efficiency in caring for larvae, particularly in differentiating between three-day-old and four-day-old larvae.
"Balanced nutrition is fundamental for honeybee colonies, impacting not just individual health but also the overall efficiency and survival of the hive," said Prof. Shafir. "Our study underscores the importance of maintaining a balanced omega-6:3 ratio in the diet of honey bees to ensure they can perform their crucial roles within the colony effectively."
The implications of this research are far-reaching, particularly in cultivated landscapes where the availability of nutritionally balanced pollen sources may be limited. The shift towards a greater omega-6:3 ratio in these areas could pose a significant threat to bee populations, affecting their health, cognitive abilities, and ability to sustain their colonies. "This study opens new avenues for further research linking fitness-related behaviors to nutritional balancing in honeybees," added Prof. Shafir. "It also highlights the need for conservation efforts to ensure diverse and nutritionally adequate pollen sources are available for these essential pollinators."
The research aligns with broader findings in other species, where nutritional imbalances are known to affect survival, reproductive success, and offspring health. It calls for increased awareness and measures to support the nutritional needs of honeybees, essential for maintaining their populations and the vital pollination services they provide.
The research paper titled “Unbalanced dietary omega-6:3 ratio affects onset of nursing and nurse–larvae interactions by honey bees, Apis mellifera” is now available in Animal Behaviour and can be accessed at https://doi.org/10.1016/j.anbehav.2024.05.007.
Researchers:
Danny Minahan, Maya Goren, Sharoni Shafir
Institution:
B. Triwaks Bee Research Center, Department of Entomology, Institute of Environmental Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem
The Hebrew University of Jerusalem is Israel's premier academic and research institution. Serving over 23,000 students from 80 countries, the University produces nearly 40% of Israel’s civilian scientific research and has received over 11,000 patents. Faculty and alumni of the Hebrew University have won eight Nobel Prizes and a Fields Medal. For more information about the Hebrew University, please visit http://new.huji.ac.il/en.
Pictures:
Title: Worker Honey Bees with Barcodes Engaging in Nursing Behavior
Description: Under red light (used to film the bees without disturbing them), with one barcoded bee as detected by the image-analysis software and its personal identification number appears on the screen.
Credit: Danny Minahan
Title: Barcoded nurse bees patrolling the brood area.
Credit: Danny Minahan
