Visual Acuity in Octopus Pallidus and Octopus Australis
نویسنده
چکیده
Specimens of Octopus pallidus and 0. australis were trained to discriminate vertical from horizontal rectangles, vertical from horizontal gratings, and vertical and horizontal gratings from uniform grey. In the discriminations that involved gratings a conditional simultaneous discrimination procedure was used, in which the two stimuli to be discriminated were presented stationary at the two ends of the tank, and a moving white disc was shown in front of each of them. Attacks on a disc were then rewarded or punished depending on the background against which it was shown. Animals rapidly reached performance levels of better than 80% correct responses on all discriminations.
منابع مشابه
Short Communication the Visual Acuity of Octopuses for Gratings of Different Orientations
A recent study has shown that the minimum separable angle of visual acuity of Octopus pallidus and O. australis lies between 4-4' and 9-7' when vertical and horizontal gratings are used as test objects (Muntz & Gwyther, 1988). In view of other observations the horizontal rectangular shape of octopus pupils, the pronounced astigmatism of the lens of Eledone cirrhosa (Sroczynski & Muntz, 1985), t...
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