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Swarming generates rebel workers in honeybees. | LitMetric

Swarming generates rebel workers in honeybees.

Curr Biol

Institute of Environmental Sciences, Jagiellonian University, Gronostajowa 7, 30-387 Krakow, Poland.

Published: April 2012

AI Article Synopsis

  • Kin selection theory explains how the genetic relationships within a colony influence the altruistic behaviors of eusocial insects, like honeybees, leading to worker sterility or limited reproduction.
  • Workers in honeybee colonies may adopt more selfish behaviors, such as laying their own eggs, when they detect signs that their relatedness to other colony members is decreasing, especially after swarming and replacing the queen.
  • Research shows that workers from the original queen, when reared in a temporarily queenless environment, demonstrate a shift in reproductive strategy, indicating that kin selection impacts both cooperative and competitive dynamics within honeybee societies.

Article Abstract

According to kin selection theory, the colony kin structure of eusocial insects motivates workers' altruistic behaviors and therefore their sterility or restricted reproduction [1]. Indeed, theory and cross-species comparison confirm that workers engage in their own reproduction depending on relatedness among colony members [2, 3]. We show that in a honeybee colony, the workers switch from their typical altruistic role to a more selfish one if at their larval stage there are environmental cues of an upcoming decline in intracolony relatedness. This happens inevitably when a colony multiplies by swarming and replaces the mother queen with her daughter, because the mother queen's workers are faced with rearing the sister queen's offspring related to them half as much as between sisters. Workers developing from the mother queen's eggs immediately after swarming, in a temporarily queenless colony, had more ovarioles in their ovaries and less-developed hypopharyngeal glands producing brood food than control workers reared in queenright conditions. These "rebel" workers were more engaged in laying their own male-determined eggs than in rearing offspring, whether or not the sister queen was present in the colony. The finding of this previously unknown rebel strategy confirms that kin selection shapes both cooperation and conflict in honeybee societies.

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Source
http://dx.doi.org/10.1016/j.cub.2012.02.063DOI Listing

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