NDLI: New kind of polarotaxis governed by degree of polarization: attraction of tabanid flies to differently polarizing host animals and water surfaces

Content Provider	Springer Nature Link
Author	Egri, Ádám Blahó, Miklós Sándor, András Kriska, György Gyurkovszky, Mónika Farkas, Róbert Horváth, Gábor
Copyright Year	2012
Abstract	Aquatic insects find their habitat from a remote distance by means of horizontal polarization of light reflected from the water surface. This kind of positive polarotaxis is governed by the horizontal direction of polarization (E-vector). Tabanid flies also detect water by this kind of polarotaxis. The host choice of blood-sucking female tabanids is partly governed by the linear polarization of light reflected from the host’s coat. Since the coat-reflected light is not always horizontally polarized, host finding by female tabanids may be different from the established horizontal E-vector polarotaxis. To reveal the optical cue of the former polarotaxis, we performed choice experiments in the field with tabanid flies using aerial and ground-based visual targets with different degrees and directions of polarization. We observed a new kind of polarotaxis being governed by the degree of polarization rather than the E-vector direction of reflected light. We show here that female and male tabanids use polarotaxis governed by the horizontal E-vector to find water, while polarotaxis based on the degree of polarization serves host finding by female tabanids. As a practical by-product of our studies, we explain the enigmatic attractiveness of shiny black spheres used in canopy traps to catch tabanids.
Starting Page	407
Ending Page	416
Page Count	10
File Format	PDF
ISSN	00281042
Journal	Naturwissenschaften
Volume Number	99
Issue Number	5
e-ISSN	14321904
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-05-12
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Tabanid fly Polarization vision Polarotaxis Degree of polarization Direction of polarization Water detection Host choice Visual ecology Environment Life Sciences
Content Type	Text
Resource Type	Article
Subject	Medicine Ecology, Evolution, Behavior and Systematics

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