Abstract

The topography of ganglion cells in the retina of three neonatal bottlenose dolphins Tursiops truncatus has been studied in retinal wholemounts. Two areas of high ganglion cell density have been identified in the form of local spots in the temporal and nasal quadrants of the retina, near a horizontal diameter at a distance of 10–15 mm from the optical disk. The maximum density of ganglion cells in these areas on average for five preparations is 657 and 636 cells/mm² in the temporal and nasal quadrants, respectively. The retinal resolution, estimated by the maximum density of ganglion cells and a posterior nodal distance of 13 mm, was 0.17° for the temporal quadrant and 0.18° for the nasal one. These data are comparable with the results for the previously studied adult dolphin and whale species.

中文翻译：

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新生宽吻海豚Tursiops truncatus视网膜的最佳视区和视觉分辨率。

摘要

在整个视网膜中研究了三个新生宽吻海豚Tursiops truncatus视网膜中神经节细胞的形貌。已经确定了两个神经节细胞密度高的区域，以视网膜的颞和鼻象限中的局部斑点的形式出现，它们的水平直径接近光盘，距光盘的距离为10-15 mm。五种制剂在这些区域中神经节细胞的平均最大密度平均为657和636个细胞/ mm ²分别位于颞和鼻象限。通过神经节细胞的最大密度和后结节距离为13 mm估算的视网膜分辨率，颞象限为0.17°，鼻象限为0.18°。这些数据与先前研究的成年海豚和鲸鱼物种的结果相当。