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The role of dopamine and serotonin in conditioned food aversion learning in the honeybee.
MedLine Citation:
PMID:  21980568     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
For most animals, eating entails the risk of being poisoned. Learning how to identify foods with toxins is an important mechanism that reduces the risk of poisoning. While conditioned food aversions have been studied in vertebrates for over 50 years, the neural circuits underlying this form of learning have been difficult to elucidate because of their complexity. Insects, such as fruit flies and honeybees, are important models for the study of the neural mechanisms of learning and memory, but conditioned food aversions have not yet been reported from either species. My collaborators and I recently established that the honeybee has the ability to learn to avoid odors associated with toxins in food using two independent neural pathways. In these experiments, we found that honeybees can learn to associate scents with toxins that they can pre-ingestively detect using their proboscis. This form of learning is primarily mediated by the neurotransmitter, dopamine. We also found a second mechanism: bees can learn to avoid odors associated with the malaise caused by ingesting toxins. This form of learning is mediated by serotonin. Our data are the first to show that two different mechanisms account for conditioned food aversions in insects.
Authors:
Geraldine A Wright
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Communicative & integrative biology     Volume:  4     ISSN:  1942-0889     ISO Abbreviation:  Commun Integr Biol     Publication Date:  2011 May 
Date Detail:
Created Date:  2011-10-07     Completed Date:  2011-11-10     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  101478473     Medline TA:  Commun Integr Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  318-20     Citation Subset:  -    
Affiliation:
Centre for Behaviour and Evolution; Institute of Neuroscience; Newcastle University; Newcastle upon Tyne, UK.
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