The pupil response of a teleost fish, Porichthys notatus: description and comparison to other species

The pupil response of Porichthys notatus to different intensities of illumination is described and compared to that of P. myriaster, Cephaloscyllium ventriosum, and a human. While the fully dark adapted pupil is round, at the highest light intensities it consists of only two small, almost independen...

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Bibliographic Details
Published in:Vision research (Oxford) 1998-09, Vol.38 (18), p.2697-2710
Main Authors: Douglas, R.H, Harper, R.D, Case, J.F
Format: Article
Language:English
Subjects:
Adaptation, Ocular
Animals
Biological and medical sciences
Bioluminescence
Cell Movement
Eye and associated structures. Visual pathways and centers. Vision
Fiber Optic Technology
Fish
Fishes - physiology
Fundamental and applied biological sciences. Psychology
Humans
Iris
Photic Stimulation
Pupil
Pupil - physiology
Reflex, Pupillary
Retina - cytology
Retinomotor
Vertebrates: nervous system and sense organs
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Description
Summary:The pupil response of Porichthys notatus to different intensities of illumination is described and compared to that of P. myriaster, Cephaloscyllium ventriosum, and a human. While the fully dark adapted pupil is round, at the highest light intensities it consists of only two small, almost independent, apertures with a total area 4.9% of that observed in the fully dilated animal. The response is at least partially consensual and occurs, albeit at a much reduced rate, in isolated eyes. P. notatus also displays retinomotor movements comparable to those seen in most teleosts, suggesting that, contrary to most previous assumptions, pupillary responses and retinomotor migrations are not mutually exclusive.
ISSN:0042-6989
1878-5646
DOI:10.1016/S0042-6989(98)00021-2