Chang Shen-Chang, Zhuang Zi-Xuan, Lin Min-Jung, Cheng Chuen-Yu, Lin Tsung-Yi, Jea Yu-Shine, Huang San-Yuan
Department of Animal Science, National Chung Hsing University, Taiwan; Changhua Animal Propagation Station, Livestock Research Institute, Council of Agriculture, Taiwan.
Department of Animal Science, National Chung Hsing University, Taiwan.
Anim Reprod Sci. 2016 Apr;167:96-102. doi: 10.1016/j.anireprosci.2016.02.012. Epub 2016 Feb 16.
Light is an essential external factor influencing various physiological processes, including reproductive performance, in birds. Although several attempts have been made to understand the effect of light on poultry production, the effect of light of a particular wavelength (color) on the reproductive function in geese remains unclear. This study evaluated the effect of various monochromatic light sources on the levels of sex hormone and on semen quality of ganders. Of 30 male White Roman geese in their third reproductive season (average age=3 years), 27 were divided into three groups receiving monochromatic white or red or blue lights. The birds were kept in an environmentally controlled house with a lighting photoperiod of 7L:17D for six weeks as the adaptation period. The photoperiod was subsequently changed to 9L:15D and maintained for 24 weeks. Three ganders at the beginning of the study and three from each group at the end of the adjusting period and the 20th and 30th week of the study period were sacrificed, and their testes and blood samples were collected for determining the sex hormone levels. Semen samples were collected for determining semen quality parameters, including the semen collection index, sperm concentration, semen volume, sperm motility, sperm viability, sperm morphology, and semen quality factor. The results showed that the testosterone and estradiol levels remained unchanged in all three groups at all time points. The ratio of testosterone to estradiol of ganders exposed to white light was significantly higher than that of ganders exposed to red light at the 30th week (P<0.05). Semen collection index and sperm viability of ganders exposed to blue light were significantly the lowest (P<0.05). Moreover, sperm motility, sperm viability, and percentage of morphologically normal spermatozoa of ganders in white light were the highest (P<0.05). In conclusion, the results of this study suggested that artificial illumination with white light may maintain a better semen quality than that with red or blue lights in ganders.
光照是影响鸟类各种生理过程（包括繁殖性能）的重要外部因素。尽管人们已多次尝试了解光照对家禽生产的影响，但特定波长（颜色）的光对鹅繁殖功能的影响仍不明确。本研究评估了各种单色光源对雄鹅性激素水平和精液质量的影响。在30只处于第三个繁殖季节的雄性白罗曼鹅（平均年龄 = 3岁）中，将27只分为三组，分别接受单色白光、红光或蓝光照射。这些鹅被饲养在环境可控的禽舍中，适应期的光照周期为7小时光照：17小时黑暗，持续6周。随后将光照周期改为9小时光照：15小时黑暗，并维持24周。在研究开始时选取3只雄鹅，在调整期结束时以及研究期的第20周和第30周，从每组中各选取3只雄鹅进行宰杀，采集它们的睾丸和血液样本以测定性激素水平。采集精液样本以测定精液质量参数，包括采精指数、精子浓度、精液体积、精子活力、精子存活率、精子形态和精液质量因子。结果表明，在所有时间点，三组的睾酮和雌二醇水平均保持不变。在第30周时，接受白光照射的雄鹅的睾酮与雌二醇之比显著高于接受红光照射的雄鹅（P<0.05）。接受蓝光照射的雄鹅的采精指数和精子存活率显著最低（P<0.05）。此外，接受白光照射的雄鹅的精子活力、精子存活率和形态正常精子的百分比最高（P<0.05）。总之，本研究结果表明，在雄鹅中，白光人工照明可能比红光或蓝光照明能维持更好的精液质量。
