Laboratory of Animal Physiology and Behavior, Departamento de Fisiologia, Instituto de Biociências (IBB)/CAUNESP, UNESP, Botucatu, SP, Brazil.
Zoology (Jena). 2013 Feb;116(1):64-6. doi: 10.1016/j.zool.2012.08.001. Epub 2013 Jan 3.
We investigated the effects of environmental light colors (blue, yellow and white) on the stress responses (measured by changes in ventilatory frequency - VF) of Nile tilapia to confinement. After 7 days of light treatment, the VF was similar for fish in each color. On the 8th day, fish were confined for 15 min. After release, the post-confinement VF was measured six times (first period: 0, 2 and 4 min; second period: 6, 8 and 10 min). Irrespective of the light color treatment, confinement increased the VF to higher levels during the first post-confinement period than during the second one. When color was analyzed, irrespective of time, fish under white light increased their VF post-confinement, and blue light prevented this effect. We conclude that blue light is the preferred color for Nile tilapia in terms of reducing stress. This finding is in contrast to previous choice test studies that indicated that yellow is their preferred color.
我们研究了环境光颜色（蓝色、黄色和白色）对尼罗罗非鱼因被限制而产生的应激反应（通过通气频率变化测量 - VF）的影响。经过 7 天的光照处理后，每种颜色的鱼的 VF 相似。第 8 天，鱼被限制 15 分钟。释放后，测量了 6 次限制后的 VF（第一期：0、2 和 4 分钟；第二期：6、8 和 10 分钟）。无论光色处理如何，与第二期相比，限制后的第一个时期鱼的 VF 更高。当分析颜色时，无论时间如何，在限制后，白光下的鱼增加了 VF，而蓝光则阻止了这种效果。我们得出结论，从减少应激的角度来看，蓝色是尼罗罗非鱼的首选颜色。这一发现与之前的选择测试研究相反，表明黄色是它们的首选颜色。
