Visual discrimination and resolution in freshwater stingrays (Potamotrygon motoro)

Martha M. M. Daniel; Laura Alvermann; Imke Böök; Vera Schluessel

doi:10.1007/s00359-020-01454-2

Visual discrimination and resolution in freshwater stingrays (Potamotrygon motoro)

Martha M. M. Daniel, Laura Alvermann, Imke Böök, Vera Schluessel^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

5 Downloads (Pure)

Abstract

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 < 0.13 to 0.23 cpd under the given experimental conditions. Additionally, this report includes the first evidence for memory retention in this species.

Original language	English
Pages (from-to)	43-58
Number of pages	16
Journal	Journal of Comparative Physiology A
Volume	207
Issue number	1
DOIs	https://doi.org/10.1007/s00359-020-01454-2
Publication status	Published - Jan 2021
Externally published	Yes

Bibliographical note

Keywords

Behavioral cognition
Visual acuity
Shape
Learning
Elasmobranch

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10.1007/s00359-020-01454-2Licence: CC BY

Publisher version (open access)Final published version, 3.2 MBLicence: CC BY

Cite this

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title = "Visual discrimination and resolution in freshwater stingrays (Potamotrygon motoro)",

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doi = "10.1007/s00359-020-01454-2",

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AU - Daniel, Martha M. M.

AU - Alvermann, Laura

AU - Böök, Imke

AU - Schluessel, Vera

N1 - © The Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

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N2 - 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 < 0.13 to 0.23 cpd under the given experimental conditions. Additionally, this report includes the first evidence for memory retention in this species.

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KW - Behavioral cognition

KW - Visual acuity

KW - Shape

KW - Learning

KW - Elasmobranch

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Visual discrimination and resolution in freshwater stingrays (Potamotrygon motoro)

Abstract

Bibliographical note

Keywords

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