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Deep-Sea Fishes; Vertical-Distribution; Crystalline Lens; Feeding Ecology; Eastern Gulf; Eye; Bioluminescence; Pisces; System; Mexico
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Full-Text Articles in Life Sciences
Visual Acuity In Pelagic Fishes And Mollusks, Yl Gagnon, Tt Sutton, S Johnsen
Visual Acuity In Pelagic Fishes And Mollusks, Yl Gagnon, Tt Sutton, S Johnsen
VIMS Articles
In the sea, visual scenes change dramatically with depth. At shallow and moderate depths (<1000 >m), there is enough light for animals to see the surfaces and shapes of prey, predators, and conspecifics. This changes below 1000 m, where no downwelling daylight remains and the only source of light is bioluminescence. These different visual scenes require different visual adaptations and eye morphologies. In this study we investigate how the optical characteristics of animal lenses correlate with depth and ecology. We measured the radius, focal length, and optical quality of the lenses of pelagic fishes, cephalopods, and a gastropod using a …