Barrell G K, Lapwood K R
J Endocrinol. 1979 Mar;80(3):397-405. doi: 10.1677/joe.0.0800397.
Two experiments were carried out to study the effects of controlled lighting régimes on plasma levels of LH were low in all groups of rams, which made the detection of significant effects of any treatment very unlikely. Pinealectomy reduced the effects of changes in the daily photoperiod on the patterns of secretion of testosterone and prolactin. These findings establish the pineal gland as an organ which influences the endocrine responses of rams to photoperiodic stimuli and it is concluded that the pineal gland is probably important as a mediator of seasonal reproductive changes in these animals.
进行了两项实验来研究可控光照制度对公羊血浆中促黄体生成素水平的影响，所有公羊组的促黄体生成素水平都很低，这使得检测任何处理的显著效果都极不可能。松果体切除减少了每日光照周期变化对睾酮和催乳素分泌模式的影响。这些发现确立了松果体作为一个影响公羊对光周期刺激的内分泌反应的器官，并且得出结论，松果体可能作为这些动物季节性生殖变化的介质很重要。
