Electroretinographic recordings were made from hatchling loggerhead and leatherback sea turtle eyecup preparations during presentation of sinusoidally modulated lights of different frequencies, mean intensities and colors. Cross-correlation analysis was performed to determine the extent to which the responses followed the intensity modulated light sources. For both species mean light intensity had no significant effect on the frequency modulated responses over a 1.5 log unit range of intensities. Both species showed the best following to blue light and the poorest tracking to red light. Leatherback retinas did not follow frequencies above 10 Hz, while loggerhead responses extended out to 15 Hz. These visual low pass filter characteristics are consistent with attributes of the visual ecology of each species, as well as with the latencies and slow rise times exhibited by these retinas to brief flashes of light.

译文

:视网膜电图记录是在呈现不同频率,平均强度和颜色的正弦调制光时,用孵化的logger和棱皮海龟眼罩制备的。进行互相关分析以确定响应遵循强度调制光源的程度。在强度的1.5 log单位范围内,两种物质的平均光强度对调频响应均无显着影响。两种物种对蓝光的追踪最佳,对红光的追踪最差。棱皮视网膜未遵循高于10 Hz的频率,而的响应扩展至15 Hz。这些视觉低通滤波器的特性与每种物种的视觉生态属性以及这些视网膜对短暂闪光所表现出的潜伏期和缓慢上升时间相一致。

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