Functional changes of the visual system of the damselfish Dascyllus marginatus along its bathymetric range

Physiology & Behavior
Eran BrokovichNadav Shashar

Abstract

Shallow-water zooplanktivorous fish rely on their vision for foraging. In shallow water, feeding efficiency decreases in dim light and thus the fish cease foraging at crepuscular hours. Creatures living in the lower parts of their depth ranges are expected to be exposed to limited light levels for longer hours. However, observations of the zooplanktivore Dascyllus marginatus showed little change in foraging duration down to 40m deep. We asked whether the visual system's functionality changes with depth along the depth range of this damselfish; we examined eye and retina anatomy for changes in visual acuity and light sensitivity and used the optomotor response to test for spatial and temporal light summation. We found only minor changes in the anatomy of the eye that are not expected to affect visual sensitivity or acuity. However, behavioural experiments showed that the deeper water fish's test performance exceeded those of fish in shallow water under lower light levels. We found that deeper water fish responded to the optomotor test at lower light levels and also had more discriminating visual acuity in low light, which can increase their potential reactive distance. The plastic adaptive ability of the visual system to low lig...Continue Reading

References

Jan 1, 1984·Vision Research·J N Lythgoe
Jan 1, 1980·Vision Research·D G GreenM S Banks
Jun 1, 1994·Vision Research·W N McFarland, E R Loew
Apr 16, 1998·Vision Research·E J Warrant, D E Nilsson
Aug 17, 1999·Current Opinion in Neurobiology·E N PughT D Lamb
Nov 18, 2000·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·M F Land
Nov 18, 2000·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·E Warrant
Feb 28, 2002·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·M E Cummings, J C Partridge
Mar 10, 2004·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Nicholas W RobertsCraig W Hawryshyn
Sep 16, 2004·Biological Reviews of the Cambridge Philosophical Society·Eric J Warrant, N Adam Locket
Apr 23, 2005·Progress in Retinal and Eye Research·Hans-Joachim Wagner, Ronald H H Kröger
Apr 1, 2006·Biological Reviews of the Cambridge Philosophical Society·David I WartonMark Westoby
Nov 25, 2006·The Journal of Physiology·Yiu Tak LeungHugh R Matthews
Jul 25, 2007·Proceedings of the National Academy of Sciences of the United States of America·Sunhwa Lee, Charles F Stevens
Mar 11, 2008·Physiology & Behavior·Anne-Sophie Darmaillacq, Nadav Shashar

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Citations

Feb 12, 2014·PloS One·Igal BerenshteinClaire B Paris
Aug 29, 2014·PeerJ·Peter ShumStefano Mariani
Jan 23, 2016·Proceedings. Biological Sciences·Tom C L BridgeRandall K Kosaki
Jun 30, 2018·Journal of Fish Biology·Katherine R Znotinas, Emily M Standen

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