NDLI: Out of the blue: the spectral sensitivity of hummingbird hawkmoths

Content Provider	Springer Nature Link
Author	Telles, Francismeire Jane Lind, Olle Henze, Miriam Judith Rodríguez Gironés, Miguel Angel Goyret, Joaquin Kelber, Almut
Copyright Year	2014
Abstract	The European hummingbird hawkmoth Macroglossum stellatarum is a diurnal nectar forager like the honeybee, and we expect similarities in their sensory ecology. Using behavioural tests and electroretinograms (ERGs), we studied the spectral sensitivity of M. stellatarum. By measuring ERGs in the dark-adapted eye and after adaptation to green light, we determined that M. stellatarum has ultraviolet (UV), blue and green receptors maximally sensitive at 349, 440 and 521 nm, and confirmed that green receptors are most frequent in the retina. To determine the behavioural spectral sensitivity (action spectrum) of foraging moths, we trained animals to associate a disk illuminated with spectral light, with a food reward, and a dark disk with no reward. While the spectral positions of sensitivity maxima found in behavioural tests agree with model predictions based on the ERG data, the sensitivity to blue light was 30 times higher than expected. This is different from the honeybee but similar to earlier findings in the crepuscular hawkmoth Manduca sexta. It may indicate that the action spectrum of foraging hawkmoths does not represent their general sensory capacity. We suggest that the elevated sensitivity to blue light is related to the innate preference of hawkmoths for blue flowers.
Starting Page	537
Ending Page	546
Page Count	10
File Format	PDF
ISSN	03407594
Journal	Journal of Comparative Physiology A
Volume Number	200
Issue Number	6
e-ISSN	14321351
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-02-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Spectral sensitivity Macroglossum stellatarum Sphingidae Insect colour vision Action spectrum Animal Physiology Neurosciences Zoology
Content Type	Text
Resource Type	Article
Subject	Physiology Behavioral Neuroscience Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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