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鳗鲡幼鱼(平均体长55.4—250.0毫米)在水平光梯度下对10~(-2)—10~3lux的光刺激都能表现出趋光反应。随着鳗鲡幼鱼的生长发育,其适宜光照强度也由10~1—10~2lux逐渐移至10~(-2)—10~(-1)lux.在弱光区(10~(-2)—10~(-1)lux)的趋光反应随着鳗鲡幼鱼的生长发育而逐渐坛大,而在强光区(10~2—10~3lux)情况正好相反。 鳗鲡幼鱼对光的反应在12分钟内就出现了光适应,但是其发育阶段不同,光适应也不一样。 在背景光下鳗鲡幼鱼趋光反应的辐度比无背景光时低。但趋光反应的规律在有或无背景光下基本相似。原来趋光反应较强者,受背景光的影响较小,反之则较大。
Eels juveniles (mean body length 55.4-250.0 mm) exhibited phototactic responses to light stimulation of 10 -2 -10 -10 lux under a horizontal optical gradient. With the growth and development of juvenile eel juveniles, the suitable light intensity was gradually shifted from 10 ~ 1-10 ~ 2lux to 10 ~ (-2) -10 ~ (-1) lux. ) -10 ~ (-1) lux) gradually increased with the growth of juvenile eel (Anguilla anguilla), while the opposite was true in the bright region (10 ~ 2-10 ~ 3 lux). The response of juvenile eels to light appeared in 12 minutes light adaptation, but its developmental stage is different, light adaptation is not the same. In the background light juvenile angiosperm reactivity than the absence of backlight low. But the law of photophoretic response is similar with or without background light. The original photophobia reaction strong, less affected by the background light, on the contrary larger.