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Sense of Sight: Photoreception

Sense of Sight: Photoreception

Chapter:
(p.185) Chapter 8 Sense of Sight: Photoreception
Source:
The Biology of Sharks and Rays
Author(s):
A. Peter Klimley
Publisher:
University of Chicago Press
DOI:10.7208/chicago/9780226923086.003.0008

This chapter discusses the underwater photic environment, the anatomy of the eye, the spectral sensitivities of visual pigments, and the visual capabilities of the different cartilaginous fishes. All of the sharks, rays, and chimaeras have small pores on the underside of their heads connected to gel-filled tubules that lead to the nervous system, called the ampullae of Lorenzini. These sense minute electrical fields, which are produced by fish, clams, and crabs while out of sight buried in the sand.

Keywords:   cartilaginous fishes, vision, eye, underwater photic environment

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