Abstract
The ability to learn food odors inside the nest and to associate them with food sources in the field is of essential importance for the recruitment of nestmates in social bees. We investigated odor learning by workers within the hive and the influence of these odors on their food choice in the field in the stingless bee Scaptotrigona pectoralis. During the experiments, recruited bees had to choose between two feeders, one with an odor that was present inside the nest during the recruitment process, and one with an unknown odor. In all experiments with different odor combinations (linalool/phenylacetaldehyde, geraniol/eugenol) a significant majority of bees visited the feeder with the odor they had experienced in their nest (χ 2-tests; p < 0.05). By contrast, the bees showed no preference for one of two feeders when they were either baited with the same odor (linalool) or contained no odor. Our results clearly show that naïve workers of S. pectoralis can learn the odor of a food source during the recruitment process from the nest atmosphere and that their subsequent food search in the field is influenced by the learned odor.
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Acknowledgments
We would like to express our thanks to Javier Guevara from the Ministerio del Ambiente y Energia (MINAE) of Costa Rica, for his help in obtaining research permits (080-2006-SINAC, 133-2007-SINAC). This work was supported by a scholarship from the German Academic Exchange Service (DAAD) granted to CR.
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Reichle, C., Jarau, S., Aguilar, I. et al. Recruits of the stingless bee Scaptotrigona pectoralis learn food odors from the nest atmosphere. Naturwissenschaften 97, 519–524 (2010). https://doi.org/10.1007/s00114-010-0662-2
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DOI: https://doi.org/10.1007/s00114-010-0662-2