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dc.contributor.authorKopperud, Kristin L.
dc.contributor.authorGrace, Michael S.
dc.identifier.citationKopperud, K. L., & Grace, M. S. (2017). Circadian rhythms of retinomotor movement in a marine megapredator, the atlantic tarpon, megalops atlanticus. International Journal of Molecular Sciences, 18(10) doi:10.3390/ijms18102068en_US
dc.descriptionCircadian rhythm, Photoreceptors, Retinomotor movement, animal tissue, antibody labeling, Article, biological rhythm, circadian rhythm, controlled study, darkness, eye movement, fish immunofluorescence, immunohistochemistry, light pollution, Megalops atlanticus, nonhuman, predator avoidance, retinomotor movementen_US
dc.description.abstractMany ecologically and economically important marine fish species worldwide spend portions of their lives in coastal regions that are increasingly inundated by artificial light at night. However, while extensive research illustrates the harmful effects of inappropriate light exposure on biological timing in humans, rodents and birds, comparable studies on marine fish are virtually nonexistent. This study aimed to assess the effects of light on biological clock function in the marine fish retina using the Atlantic tarpon (Megalops atlanticus) as a model. Using anti-opsin immunofluorescence, we observed robust rhythms of photoreceptor outer segment position (retinomotor movement) over the course of the daily light-dark cycle: cone outer segments were contracted toward the inner retina and rods were elongated during the day; the opposite occurred at night. Phase shifting the daily light-dark cycle caused a corresponding shift of retinomotor movement timing, and cone retinomotor movement persisted in constant darkness, indicating control by a circadian clock. Constant light abolished retinomotor movements of both photoreceptor types. Thus, abnormally-timed light exposure may disrupt normal M. atlanticus clock function and harm vision, which in turn may affect prey capture and predator avoidance. These results should help inform efforts to mitigate the effects of coastal light pollution on organisms in marine ecosystems.en_US
dc.description.sponsorshipPublication of this article was funded in part by the Open Access Subvention Fund and the Florida Tech Libraries.
dc.rights© 2017 by the authors.en_US
dc.titleCircadian rhythms of retinomotor movement in a marine megapredator, the atlantic tarpon, Megalops atlanticusen_US

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© 2017 by the authors.
Except where otherwise noted, this item's license is described as © 2017 by the authors.