Visual discrimination and resolution in freshwater stingrays (Potamotrygon motoro)

Potamotrygon motoro has been shown to use vision to orient in a laboratory setting and has been successfully trained in cognitive behavioral studies using visual stimuli. This study explores P. motoro ’s visual discrimination abilities in the context of two-alternative forced-choice experiments, wit...

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Bibliographic Details
Published in:Journal of Comparative Physiology 2021-01, Vol.207 (1), p.43-58
Main Authors: Daniel, Martha M. M., Alvermann, Laura, Böök, Imke, Schluessel, Vera
Format: Article
Language:English
Subjects:
Animal Physiology
Animals
Behavior, Animal - physiology
Biomedical and Life Sciences
Cognition - physiology
Cognitive ability
Dasyatidae
Discrimination Learning - physiology
Elasmobranchii - physiology
Fresh Water
Horizontal orientation
Life Sciences
Memory - physiology
Neurosciences
Orientation - physiology
Orientation behavior
Original Paper
Potamotrygon motoro
Vertical orientation
Visual discrimination
Visual Perception - physiology
Visual stimuli
Zoology
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Summary:Potamotrygon motoro has been shown to use vision to orient in a laboratory setting and has been successfully trained in cognitive behavioral studies using visual stimuli. This study explores P. motoro ’s visual discrimination abilities in the context of two-alternative forced-choice experiments, with a focus on shape and contrast, stimulus orientation, and visual resolution. Results support that stingrays are able to discriminate stimulus-presence and -absence, overall stimulus contrasts, two forms, horizontal from vertical stimulus orientations, and different colors that also vary in brightness. Stingrays tested in visual resolution experiments demonstrated a range of visual acuities from 
ISSN:0340-7594
1432-1351
DOI:10.1007/s00359-020-01454-2