Photopic Spectral Sensitivity of Green and Loggerhead Sea Turtles

Autor:	Michael A. Crognale, David H. Levenson, Jess F. Deegan, Gerald H. Jacobs, Scott A. Eckert
Rok vydání:	2004
Předmět:	genetic structures Ecology business.industry Aquatic Science Biology Long wavelength Wavelength Optics Spectral sensitivity Flicker electroretinography Oil droplet Animal Science and Zoology Photopigment sense organs business Erg Ecology Evolution Behavior and Systematics Photopic vision
Zdroj:	Copeia. 2004:908-914
ISSN:	1938-5110 0045-8511
DOI:	10.1643/cp-03-217r1
Popis:	Flicker electroretinography (ERG) was used to examine the in situ photopic (cone-photoreceptor based) spectral sensitivities of Green and Loggerhead Sea Turtles. Both species were responsive to wavelengths from 440–700 nm, and both had peak sensitivity in the long wavelength portion of the spectrum (∼580 nm). For Loggerhead Sea Turtles, no measurable responses were obtained below about 440 nm, whereas reliable signals were seen for Green Sea Turtles at wavelengths down to 400 nm. Both species exhibited significant declines in sensitivity below 500 nm. The overall shapes of the spectral sensitivity functions were similar for the two species. These results support previous findings that sea turtles have well-developed photopic visual systems. The characteristics of these spectral sensitivity functions indicate that both species possess multiple cone photopigment types, and these, in conjunction with the presence of colored oil droplets, strongly imply a capacity for color discrimination. Comparativ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d947ac98df0f6bdcdee4f7b6ef419eb3 https://doi.org/10.1643/cp-03-217r1 Zobrazit plný text záznamu