Abstract
Predators use olfactory, visual and sometimes acoustic cues from the preys to assess food information. However, it is not known if the aggressive hornets (Vespa spp.) use olfactory, visual, or both types of information to find and recognize prey. In the present study, we trained hornet workers (Vespa velutina) to a feeding area. Once the hornets began consistently foraging at this feeding area, we determined whether they located prey (bees, Apis cerana) via olfactory or visual cues. We did this by testing whether hornets were attracted to a dummy bait (bee dummy bait or non-bee dummy bait) treated with extracts of honeybee cuticular hydrocarbons. We then tested whether hornets could distinguish between bee dummy bait and cotton ball dummy bait, both treated with bee odors. Hornets preferred the dummy treated with bee odors, and bee dummies (with bee images) were more attractive to the hornet than the cotton ball dummies with only bee odors. These results clearly indicate that a combination of olfactory and visual cues helps the hornet to locate its prey.
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Acknowledgments
We thank Dr. Tanya Latty for her kind statistic help. We also would like to thank one reviewer Dr. D. Thiéry and another anonymous reviewer for their valuable comments on this manuscript, Dr. James Nieh for his careful English polishing. This work was supported by grants from the Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, and the CAS 135 program (XTBG-T01) of Chinese Academy of Science, China National Research Fund (31260585 to Ken Tan) and West Doctor Foundation of Chinese Academy of Sciences (Y02F7311W1 to Gao Chen).
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Wang, Z.W., Chen, G. & Tan, K. Both olfactory and visual cues promote the hornet Vespa velutina to locate its honeybee prey Apis cerana . Insect. Soc. 61, 67–70 (2014). https://doi.org/10.1007/s00040-013-0326-2
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DOI: https://doi.org/10.1007/s00040-013-0326-2