Visual Acuity in Octopus Pallidus and Octopus Australis
نویسندگان
چکیده
منابع مشابه
Visual Acuity in Octopus Pallidus and Octopus Australis
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 end...
متن کاملReconsideration of Serial Visual Reversal Learning in Octopus (Octopus vulgaris) from a Methodological Perspective
Octopuses (Octopus vulgaris) are generally considered to possess extraordinary cognitive abilities including the ability to successfully perform in a serial reversal learning task. During reversal learning, an animal is presented with a discrimination problem and after reaching a learning criterion, the signs of the stimuli are reversed: the former positive becomes the negative stimulus and vic...
متن کاملEarly temperamental traits in an octopus (Octopus bimaculoides).
During their 3rd week of life, 73 Octopus bimaculoides were observed to test whether discrete behaviors could be grouped reliably to reflect dimensions of temperament. Frequencies of behaviors during Week 3 were subjected to principal-components analysis (PCA), resulting in 4 components (active engagement, arousal/readiness, aggression, and avoidance/disinterest) that explain 53% of the varianc...
متن کاملDelayed Responses in Octopus
Since Hunter's (1912) original experiment with rats, it has been shown that many animals can learn to choose correctly between identical shapes even though the signal indicating the correct choice is removed before the animal is allowed to make the choice. The period during which an animal can be kept waiting after the signal has been removed and still make the correct choice varies from specie...
متن کاملProprioception and Visual Discrimination of Orientation in Octopus
Octopuses can be trained to discriminate between figures seen that differ only in orientation. Thus a rectangle shown with its long axis vertical can readily be distinguished from an exactly similar rectangle shown horizontally (Boycott & Young, 1957; Sutherland, 1957). A wide variety of cues are potentially available to octopuses in the training situation used; the figures might, for example, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Experimental Biology
سال: 1988
ISSN: 1477-9145,0022-0949
DOI: 10.1242/jeb.134.1.119