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- W1967053343 abstract "Older studies have claimed that bats including the Megachiroptera (fruit bats or flying foxes) have pure-rod retinas and possess no cone photoreceptors. We have determined the presence and the population densities of spectral cone types in six megachiropteran species belonging to four genera: <i>Pteropus rufus</i>, <i>P. niger</i>,<i> P. rodricensis</i>, <i>Rousettus madagascariensis</i>, <i>Eidolon dupreanum</i>, and <i>Epomophorus gambianus</i>. Spectral cone types and rods were assessed immunocytochemically with opsin-specific antibodies. All six species have rod-dominated retinas but possess significant cone populations. The high rod densities (range 350,000–800,000/mm<sup>2</sup>, depending on species and retinal location) provide good scotopic sensitivity in these predominantly nocturnal animals. With the cones (density range 1,300–11,000/mm<sup>2</sup>, corresponding to 0.25–0.6% of the photoreceptors, depending on species and retinal location) the retinas also possess the prerequisite for vision at photopic light levels. The three <i>Pteropus</i> species have two spectral cone types, a majority of middle-to-long-wave sensitive (L-) cones, and a minority of short-wave sensitive (S-) cones, indicating the potential for dichromatic color vision. This conforms to the pattern found in most mammals. In contrast, <i>Rousettus</i>, <i>Eidolon</i> and <i>Epomophorus</i> have L-cones but completely lack S-cones, indicating cone monochromacy and color blindness. The discussion relates these findings to the visual behavior of fruit bats." @default.
- W1967053343 created "2016-06-24" @default.
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- W1967053343 date "2005-05-18" @default.
- W1967053343 modified "2023-10-14" @default.
- W1967053343 title "Cone Photoreceptor Diversity in the Retinas of Fruit Bats (Megachiroptera)" @default.
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- W1967053343 doi "https://doi.org/10.1159/000102971" @default.
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