Physiological response of the eye to different col

Authors: Hajime Matsui Go Takayama Yasunori Sakurai

Publish Date: 2016/01/12

Volume: 82, Issue: 2, Pages: 303-309

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Abstract

To effectively introduce lightemitting diode LED lights into Japanese flying squid Todarodes pacificus fisheries information is required regarding how LED lights affect physiological responses of the squid eye In order to examine the effects of LED emissioncolor on squid eyes we observed the pupillary constriction and migration of blackscreening pigment in the retina The pupils constricted in all squid after exposure to LED lights the pupils gradually opened and pigment migration occurred Both of the physiological responses to LED light were affected by blue green and white lights which have wavelengths close to the visual pigment sensitivity peak in T pacificus 482 nm However response rates were much lower under red colored LED which comprises wavelengths that are far from the visual pigment sensitivity peak Thus the eyes of squid responded sensitively to light which included the wavelengths close to the visual pigment sensitivity peak of T pacificus and responded little to the light which did not include these wavelengths These results suggest that the eyes of T pacificus react in different ways to various LED light colors where the first reaction to a lighting change is the pupillary response and pigment migration occurs only if the illumination continuesWe would like to thank AkebonoSuisan Hakodate Japan for providing the live squid We would also like to thank H Inada and J Yamamoto for their valuable advice during the research activities We gratefully acknowledge D Vijai for his comments on the manuscript

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