Olfactory experience modifies the effect of odour on feeding behaviour in a goal-related manner |
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Authors: | E S Nikitin T A Korshunova I S Zakharov P M Balaban |
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Institution: | (1) Institute of Higher Nervous Activity and Neurophysiology, RAS, 5A Butlerova Str., Moscow, 117485, Russia;(2) Institute of Developmental Biology (N.K. Koltsov), RAS, 33 Leninsky Prospect, Moscow, 117071, Russia |
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Abstract: | Natural food odours elicit different behavioural responses in snails. The tentacle carries an olfactory organ, and it either
protracts toward a stimulating carrot odour or retraces in a startle-like fashion away from a cucumber odour. The tentacle
retraction to cucumber was still present after the snails were fed cucumber during inter-trial periods. Also, snails without
any food experience displayed a longer latency to the first bite of cucumber than of carrot and rejected cucumber more often.
After tasting these foods, the latency to carrot was not affected while the latency to and number of rejections of cucumber
decreased. These results suggest that initial repulsive features of food odour can be only partially compensated by olfactory
learning and feeding experience. In the present study, we demonstrated that an invertebrate can be repulsed or attracted by
the same natural odour at the same time and that these behavioural responses are likely aimed at achieving different physiologically
relevant goals. |
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Keywords: | Olfaction Odour Conditioning Feeding Latency |
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