Fiddler crabs (Afruca tangeri) detect second-order motion in both intensity and polarization.

Autor: Smithers SP; School of Biological Sciences, University of Bristol, Bristol Life Sciences Building, Bristol, UK. s.smithers@northeastern.edu.; Department of Psychology, Northeastern University, Boston, MA, USA. s.smithers@northeastern.edu., Brett MF; School of Biological Sciences, University of Bristol, Bristol Life Sciences Building, Bristol, UK., How MJ; School of Biological Sciences, University of Bristol, Bristol Life Sciences Building, Bristol, UK., Scott-Samuel NE; School of Psychological Science, University of Bristol, Bristol, UK., Roberts NW; School of Biological Sciences, University of Bristol, Bristol Life Sciences Building, Bristol, UK. nicholas.roberts@bristol.ac.uk.
Jazyk: angličtina
Zdroj: Communications biology [Commun Biol] 2024 Oct 03; Vol. 7 (1), pp. 1255. Date of Electronic Publication: 2024 Oct 03.
DOI: 10.1038/s42003-024-06953-5
Abstrakt: Motion vision is vital for a wide range of animal behaviors. Fiddler crabs, for example, rely heavily on motion to detect the movement of avian predators. They are known to detect first-order motion using both intensity (defined by spatiotemporal correlations in luminance) and polarization information (defined separately as spatiotemporal correlations in the degree and/or angle of polarization). However, little is known about their ability to detect second-order motion, another important form of motion information; defined separately by spatiotemporal correlations in higher-order image properties. In this work we used behavioral experiments to test how fiddler crabs (Afruca tangeri) responded to both second-order intensity and polarization stimuli. Fiddler crabs responded to a number of different intensity based second-order stimuli. Furthermore, the crabs also responded to second-order polarization stimuli, a behaviorally relevant stimulus applicable to an unpolarized flying bird when viewed against a polarized sky. The detection of second-order motion in polarization is, to the best of our knowledge, the first demonstration of this ability in any animal. This discovery therefore opens a new dimension in our understanding of how animals use polarization vision for target detection and the broader importance of second-order motion detection for animal behavior.
(© 2024. The Author(s).)
Databáze: MEDLINE
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