Pan Jinming, Yang Yefeng, Yang Bo, Yu Yonghua
College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.
PLoS One. 2014 Dec 3;9(12):e113595. doi: 10.1371/journal.pone.0113595. eCollection 2014.
Despite the overwhelming use of artificial light on captive animals, its effect on those animals has rarely been studied experimentally. Housing animals in controlled light conditions is useful for assessing the effects of light. The chicken is one of the best-studied animals in artificial light experiments, and here, we evaluate the effect of polychromatic light with various green and blue components on the growth and physiology in chicks. The results indicate that green-blue dual light has two side-effects on chick body mass, depending on the various green to blue ratios. Green-blue dual light with depleted and medium blue component decreased body mass, whereas enriched blue component promoted body mass in chicks compared with monochromatic green- or blue spectra-treated chicks. Moreover, progressive changes in the green to blue ratios of green-blue dual light could give rise to consistent progressive changes in body mass, as suggested by polychromatic light with higher blue component resulting in higher body mass. Correlation analysis confirmed that food intake was positively correlated with final body mass in chicks (R2 = 0.7664, P = 0.0001), suggesting that increased food intake contributed to the increased body mass in chicks exposed to higher blue component. We also found that chicks exposed to higher blue component exhibited higher blood glucose levels. Furthermore, the glucose level was positively related to the final body mass (R2 = 0.6406, P = 0.0001) and food intake (R2 = 0.784, P = 0.0001). These results demonstrate that spectral composition plays a crucial role in affecting growth and physiology in chicks. Moreover, consistent changes in spectral components might cause the synchronous response of growth and physiology.
尽管人工光照在圈养动物中被广泛使用，但其对这些动物的影响却很少经过实验研究。将动物饲养在可控光照条件下有助于评估光照的影响。鸡是人工光照实验中研究得最充分的动物之一，在此，我们评估了具有不同绿色和蓝色成分的多色光对雏鸡生长和生理的影响。结果表明，绿蓝光对雏鸡体重有两种副作用，这取决于不同的绿蓝比例。与单色绿光或蓝光处理的雏鸡相比，蓝色成分减少和中等的绿蓝光会降低体重，而富含蓝色成分的绿蓝光则会促进雏鸡体重增加。此外，绿蓝光中绿蓝比例的逐步变化可能会导致体重的一致逐步变化，如蓝色成分较高的多色光会导致体重增加所示。相关性分析证实，雏鸡的食物摄入量与最终体重呈正相关（R2 = 0.7664，P = 0.0001），这表明食物摄入量的增加有助于暴露于较高蓝色成分的雏鸡体重增加。我们还发现，暴露于较高蓝色成分的雏鸡血糖水平较高。此外，血糖水平与最终体重呈正相关（R2 = 0.6406，P = 0.0001）和食物摄入量呈正相关（R2 = 0.784，P = 0.0001）。这些结果表明，光谱组成在影响雏鸡生长和生理方面起着至关重要的作用。此外，光谱成分的一致变化可能会导致生长和生理的同步反应。
