Griebel, Ulrike

2 publications

Griebel, Ulrike; Schmid, Axel (detail)
1996Color vision in the manatee (Trichechus manatus).
Vision Res. 36(17): 2747-2757. 4 tabs. 3 figs. Sept. 1996.
—Antillean manatees at the Nuremberg Zoo showed the ability, in air, to distinguish blue and green from a series of grays, but failed to distinguish red and blue-green from certain shades of gray, and could not tell UV-reflecting from UV-absorbing white targets. This shows that they possess color vision that is most likely dichromatic, in agreement with the known presence of two types of cone cells in the manatee retina.
Griebel, Ulrike; Schmid, Axel (detail)
1997Brightness discrimination ability in the West Indian manatee (Trichechus manatus).
Jour. Exper. Biol. 200(11): 1587-1592.
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