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- Title
Ganglion Cells Density and Retinal Resolution in the Sea Otter, Enhydra lutris.
- Authors
Mass, Alla M.; Supin, Alexander Ya.
- Abstract
The topographic distribution, density, and size of ganglion cells were studied in retinal wholemounts of the sea otter, Enhydra lutris. The cell distribution showed a well defined horizontal streak of higher cell density, and within this streak, a narrow area of the highest cell density. The peak cell density in this area ranged from 4050 to 4400 cells/mm[sup 2] , with a mean of 4225 cells/mm[sup 2] . The ganglion cell size ranged from 7 μm to 47 μm, but the majority of cells were 7 to 30 μm. Cell size distribution revealed three size groups: 7–16, 17–28, and 29–47 μm. The highest-density area contained mainly small (7–16 μm) cells. The cell-density data predict a retinal resolution around 7’ in water. Retinal organization in the sea otter exhibits more properties common with terrestrial rather than aquatic mammals, both in terms of ganglion cell characteristics and in terms of their topographic distribution.Copyright © 2000 S. Karger AG, Basel
- Subjects
RETINA; RETINAL ganglion cells; SEA otter; CYTOLOGICAL research
- Publication
Brain, Behavior & Evolution, 2000, Vol 55, Issue 3, p111
- ISSN
0006-8977
- Publication type
Article
- DOI
10.1159/000006646