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Visual Ecology$
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Thomas W. Cronin, Sönke Johnsen, N. Justin Marshall, and Eric J. Warrant

Print publication date: 2014

Print ISBN-13: 9780691151847

Published to Princeton Scholarship Online: October 2017

DOI: 10.23943/princeton/9780691151847.001.0001

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PRINTED FROM PRINCETON SCHOLARSHIP ONLINE (www.princeton.universitypressscholarship.com). (c) Copyright Princeton University Press, 2017. All Rights Reserved. Under the terms of the licence agreement, an individual user may print out a PDF of a single chapter of a monograph in HSO for personal use (for details see http://www.universitypressscholarship.com/page/privacy-policy).date: 19 January 2018

Visual Pigments and Photoreceptors

Visual Pigments and Photoreceptors

Chapter:
(p.37) 3 Visual Pigments and Photoreceptors
Source:
Visual Ecology
Author(s):

Thomas W. Cronin

Sönke Johnsen

N. Justin Marshall

Eric J. Warrant

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691151847.003.0003

This chapter focuses on visual pigments and photoreceptors. In living things, photoreception inevitably begins with a photochemical event—a molecule intercepts a photon of light and is somehow changed. Various molecules, generally known as photopigments, perform this function in animals and plants. The molecules involved in vision are called visual pigments. In all animals, vision ultimately depends on a single family of proteins that all have descended from one common ancestor—these are the opsins. The chapter cites the hydrothermal vent crab as a good example of how changes of visual pigments appearing in various developmental states reflect ecological adaptation. The animal's life stages require visual systems sampling opposite ends of the visual spectrum.

Keywords:   visual pigments, photoreceptors, photoreception, photon, molecule, ospins, hydrothermal vent crab, visual spectrum, photopigments

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