Evidence for the Intraocular Discrimination of Vertically and Horizontally Polarized Light by Octopus

Author:

MOODY M. F.1

Affiliation:

1. Anatomy Department, University College London

Abstract

1. Four groups of octopuses (6 animals in all) were trained to discriminate between vertically and horizontally plane-polarized light. Two different sources of polarized light were used: a torch, and a disk of polaroid backed by white plastic. Half the octopuses were trained using the former source, and half using the latter. 2. With each polarized light source, discrimination could be based on a reflexion or scattering pattern, but the extra-ocular cues would be different for the two sources. 3. After training, each octopus was shown, without reward or punishment, the polarized light source with which it was not trained. The aggregate score shows efficient transfer, and three of the four groups showed a significant preference for the new source when the plane of polarization was the same as that which they were trained to attack. 4. It is concluded that the discrimination is not based on extra-ocular patterns, i.e. that the analysis of the polarized light occurs within the octopus's eye.

Publisher

The Company of Biologists

Subject

Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics

Cited by 16 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Measurements of large optical rotary dispersion in the adipose eyelid of Atlantic mackerel ( Scomber scombrus );Journal of The Royal Society Interface;2023-04

2. Polarization Vision in Cephalopods: Neuroanatomical and Behavioral Features that Illustrate Aspects of Form and Function;Marine and Freshwater Behaviour and Physiology;2002-01

3. Active marine predators: The sensory world of cephalopods;Marine and Freshwater Behaviour and Physiology;1996-01

4. Cephalopod sense organs, nerves and the brain: Adaptations for high performance and life style;Marine and Freshwater Behaviour and Physiology;1995-01

5. Polarization Sensitivity;Comparative Physiology and Evolution of Vision in Invertebrates;1981

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