Department of Visual Ecology, Harbor Branch Oceanographic Institution, 5600 U.S. 1 N, Ft. Pierce, Florida 34946.
Integr Comp Biol. 2003 Aug;43(4):559-70. doi: 10.1093/icb/43.4.559.
The effects of light adaptation on flicker fusion frequency were examined in the photoreceptors of 13 species of deep-sea crustaceans. Light adaptation produced a significant increase in the maximum critical flicker fusion frequency (CFF(max)) in 7 species-all 6 species of euphausiids in the study, and 1 species of oplophorid (Group 1). This is the first example of an increase in temporal resolution due to light adaptation in a deep-sea species. In the other six species-2 oplophorids, 1 pandalid, 1 pasiphaeid, 1 penaeid and 1 sergestid (Group 2)-light adaptation had no effect, or resulted in a decrease in the flicker fusion frequency. The mean dark-adapted CFF(max) of the Group 1 species was significantly higher, and the mean response latency significantly lower, than those of the Group 2 species. Possible explanations for these differences include the activity and bioluminescence mode of preferred prey items, as well as the retention of larval/juvenile adaptations in adult eyes.
光适应对 13 种深海甲壳动物感光器中闪烁融合频率的影响进行了研究。光适应使 7 种生物的最大临界闪烁融合频率（CFF(max)）显著增加——所有 6 种磷虾，以及 1 种磷虾（第 1 组）。这是深海物种因光适应而导致时间分辨率提高的首例。在其他 6 种生物中——2 种磷虾、1 种对虾、1 种长尾磷虾、1 种真虾、1 种短沟对虾和 1 种长尾对虾（第 2 组）——光适应没有效果，或者导致闪烁融合频率下降。第 1 组生物的平均暗适应 CFF(max)显著高于第 2 组生物，平均反应潜伏期也显著降低。这些差异的可能解释包括偏好猎物的活动和生物发光模式，以及在成年眼睛中保留幼虫/幼体适应性。
