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- W2003992294 abstract "Lake sturgeon ( Acipenser fulvescens Rafinesque, 1817) photoreceptors were studied with scanning electron microscopy and microspectrophotometry. The retina contains both rods and cones, with cones estimated composing about 30% of the photoreceptor population. Only large single cones were identified and they are similar to those found in other species of the order Acipenseriformes. The rods are large, with long, broad outer segments, and are similar to the dominant rod found in other sturgeons and the North American paddlefish ( Polyodon spathula (Walbaum, 1792)). Mean (SD) rod packing density at 22 624 ± 3 509 rods/mm 2 is low compared with those of other animals that function primarily in dim light. The visual pigment of the rods has a mean (SD) peak absorbance (λ max ) at 541 ± 2 nm. Three different cone populations were identified: a long wavelength sensitive cone containing a visual pigment with λ max at 619 ± 3 nm; middle wavelength sensitive cone with λ max at 538 ± 1 nm; and short wavelength sensitive cone with λ max at 448 ± 1 nm. All the visual pigments are based on the vitamin A 2 chromophore." @default.
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- W2003992294 date "2007-04-01" @default.
- W2003992294 modified "2023-09-26" @default.
- W2003992294 title "Spectral absorbance, structure, and population density of photoreceptors in the retina of the lake sturgeon (Acipenser fulvescens)" @default.
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- W2003992294 doi "https://doi.org/10.1139/z07-033" @default.
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