Fantie B D, Brown R E, Moger W H
J Reprod Fertil. 1984 Nov;72(2):435-41. doi: 10.1530/jrf.0.0720435.
Adult male Long-Evans rats (90 days of age) were housed in 12 h light: 12 h dark (Group LD), constant white light (Group LL), or constant dark (dim red light) (Group DD) for 60-90 days. The first of two sexual behaviour tests revealed that more (P less than 0.05) rats in Group LD achieved intromission than did those in Groups LL and DD. Only 33% of Group LL and 32% of Group DD rats ejaculated. In contrast, all Group LD rats that mounted eventually ejaculated. Males in Group LD achieved more (P less than 0.05) ejaculations (mean of both tests combined, 3.4) than did males in Groups LL (1.5) or DD (1.2). Although there were no notable differences amongst the groups in the weights of the accessory sex organs, males in Group DD had higher (P less than 0.05) serum androgen levels than did those in Groups LL and LD while Group LL males had higher (P less than 0.05) serum prolactin levels than did those in Groups LD and DD. There were no differences in LH or FSH levels. In addition, more rats in Group LL had disrupted activity rhythms than did Group DD rats. These results indicate that housing in constant white or dim red light disrupts sexual behaviour in male rats and may do so through different neuroendocrine mechanisms.
成年雄性长 Evans 大鼠（90 日龄）分别饲养在 12 小时光照：12 小时黑暗环境（LD 组）、持续白光环境（LL 组）或持续黑暗（暗红色光）环境（DD 组）中 60 - 90 天。两项性行为测试中的第一项显示，LD 组中成功插入的大鼠比 LL 组和 DD 组更多（P < 0.05）。LL 组只有 33%的大鼠射精，DD 组为 32%。相比之下，LD 组中所有骑跨的大鼠最终都射精了。LD 组的雄性大鼠射精次数更多（P < 0.05）（两项测试合并后的平均值为 3.4 次），而 LL 组（1.5 次）和 DD 组（1.2 次）的雄性大鼠射精次数较少。虽然各实验组附属生殖器官的重量没有显著差异，但 DD 组雄性大鼠的血清雄激素水平高于 LL 组和 LD 组（P < 0.05），而 LL 组雄性大鼠的血清催乳素水平高于 LD 组和 DD 组（P < 0.05）。促黄体生成素（LH）或促卵泡生成素（FSH）水平没有差异。此外，LL 组中活动节律紊乱的大鼠比 DD 组更多。这些结果表明，饲养在持续白光或暗红色光环境中会扰乱雄性大鼠的性行为，并且可能通过不同的神经内分泌机制实现。
