Ophthalmology of Ruminantia: Giraffe, Deer, Wildebeests, Gazelles, and Relatives

Plummer, Caryn E.; Ledbetter, Eric C.

doi:10.1007/978-3-030-81273-7_7

Wild and Exotic Animal Ophthalmology 2022

DOI: 10.1007/978-3-030-81273-7_7

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Ophthalmology of Ruminantia: Giraffe, Deer, Wildebeests, Gazelles, and Relatives

Caryn E. Plummer

Eric C. Ledbetter

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2023

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“…Intuitively we would expect diurnal Arctic mammals to have eyes that filter-not transmit-UV light. Overexposure to UV light could explain why cataracts are common among domesticated reindeer (Plummer & Ledbetter, 2022), but not the absence of photokeratitis, which hints at photoprotective mechanisms in the eye, such as the upregulation of ascorbic acid (Ringvold et al, 2003). The mystery deepens.…”

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Reindeer and the quest for Scottish enlichenment

Dominy,

Hobaiter,

Harris

2023

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In the hall of animal oddities, the reindeer ( Rangifer tarandus) is the only mammal with a color-shifting tapetum lucidum and the only ruminant with a lichen-dominated diet. These puzzling traits coexist with yet another enigma––ocular media that transmit up to 60% of ultraviolet (UV) light, enough to excite the cones responsible for color vision. It is unclear why any day-active circum-Arctic mammal would benefit from UV visual sensitivity, but it could improve detection of UV-absorbing lichens against a background of UV-reflecting snows, especially during the extended twilight hours of winter. To explore this idea and advance our understanding of reindeer visual ecology, we recorded the reflectance spectra of several ground-growing (terricolous), shrubby (fruticose) lichens in the diets of reindeer living in Cairngorms National Park, Scotland.

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confidence: 99%

Reindeer and the quest for Scottish enlichenment

Dominy,

Hobaiter,

Harris

2023

i-Perception

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Ophthalmology of Ruminantia: Giraffe, Deer, Wildebeests, Gazelles, and Relatives

Cited by 1 publication

References 85 publications

Reindeer and the quest for Scottish enlichenment

Reindeer and the quest for Scottish enlichenment

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