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Evidence for instantaneous e-vector detection in the honeybee using an associative learning paradigm
| Title: | Evidence for instantaneous e-vector detection in the honeybee using an associative learning paradigm |
| Authors: | Sakura, Midori Browse this author | | Okada, Ryuichi Browse this author | | Aonuma, Hitoshi Browse this author |
| Keywords: | polarization vision | | insect | | dorsal rim area | | navigation | | proboscis extension reflex |
| Issue Date: | 7-Feb-2012 |
| Publisher: | The Royal Society |
| Journal Title: | Proceedings of the Royal Society B : Biological Sciences |
| Volume: | 279 |
| Issue: | 1728 |
| Start Page: | 535 |
| End Page: | 542 |
| Publisher DOI: | 10.1098/rspb.2011.0929 |
| Abstract: | Many insects use the polarization pattern of the sky for obtaining compass information during orientation or navigation. E-vector information is collected by a specialized area in the dorsal-most part of the compound eye, the dorsal rim area (DRA). We tested honeybees' capability of learning certain e-vector orientations by using a classical conditioning paradigm with the proboscis extension reflex. When one e-vector orientation (CS+) was associated with sugar water (US), while another orientation (CS-) was not rewarded, the honeybees could discriminate CS+ from CS-. Bees, whose DRA was inactivated by painting, did not learn CS+. When ultraviolet polarized light (350 nm) was used for CS, the bees discriminated CS+ from CS-, but no discrimination was observed in blue (442 nm) or green light (546 nm). Our data indicate that honeybees can learn and discriminate between different e-vector orientations, sensed by the UV receptors of the DRA, suggesting that bees can determine their flight direction from polarized UV skylight during foraging. Fixing the bees' heads during the experiments did not prevent learning, indicating that they use an "instantaneous" algorithm of e-vector detection; i.e. the bees do not need to actively scan the sky with their DRAs ("sequential" method) to determine e-vector orientation. |
| Relation: | http://rspb.royalsocietypublishing.org/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/48200 |
| Appears in Collections: | 電子科学研究所 (Research Institute for Electronic Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 青沼 仁志
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