NDLI: High and low temperatures have unequal reinforcing properties in Drosophila spatial learning

Content Provider	Springer Nature Link
Author	Zars, Melissa Zars, Troy
Copyright Year	2006
Abstract	Small insects regulate their body temperature solely through behavior. Thus, sensing environmental temperature and implementing an appropriate behavioral strategy can be critical for survival. The fly Drosophila melanogaster prefers 24°C, avoiding higher and lower temperatures when tested on a temperature gradient. Furthermore, temperatures above 24°C have negative reinforcing properties. In contrast, we found that flies have a preference in operant learning experiments for a low-temperature-associated position rather than the 24°C alternative in the heat-box. Two additional differences between high- and low-temperature reinforcement, i.e., temperatures above and below 24°C, were found. Temperatures equally above and below 24°C did not reinforce equally and only high temperatures supported increased memory performance with reversal conditioning. Finally, low- and high-temperature reinforced memories are similarly sensitive to two genetic mutations. Together these results indicate the qualitative meaning of temperatures below 24°C depends on the dynamics of the temperatures encountered and that the reinforcing effects of these temperatures depend on at least some common genetic components. Conceptualizing these results using the Wolf–Heisenberg model of operant conditioning, we propose the maximum difference in experienced temperatures determines the magnitude of the reinforcement input to a conditioning circuit.
Starting Page	727
Ending Page	735
Page Count	9
File Format	PDF
ISSN	03407594
Journal	Journal of Comparative Physiology A
Volume Number	192
Issue Number	7
e-ISSN	14321351
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-02-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spatial learning Temperature Risk aversion Drosophila Animal Physiology Zoology Neurosciences
Content Type	Text
Resource Type	Article
Subject	Physiology Behavioral Neuroscience Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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