Vivien-Roels B, Meiniel A
Gen Comp Endocrinol. 1983 May;50(2):313-23. doi: 10.1016/0016-6480(83)90232-0.
Serotonin concentrations were measured by spectrofluorimetry in the pineal complex and the lateral eyes of Lampetra planeri, living in a natural environment, throughout two consecutive years. Large seasonal fluctuations with bimodal annual patterns of variations were observed in both the pineal complex and the lateral eyes. In the pineal complex, peak values occurred in February and August and low values in April and November. In the lateral eyes, peak values occurred in March and September. Comparison of the serotonin concentrations between the pineal complex and the lateral eyes showed that in ammocoetes the serotonin concentrations were similar in these organs, while in metamorphosing forms and adults the serotonin concentrations were significantly higher in the lateral eyes. The physiological significance of the seasonal variations of serotonin observed in both the pineal organ and the lateral eyes and the importance of environmental factors in their control remain to be determined and need further investigations.
连续两年，采用荧光分光光度法对生活在自然环境中的七鳃鳗松果复合体和侧眼中的血清素浓度进行了测定。松果复合体和侧眼中均观察到较大的季节性波动，呈现双峰年度变化模式。松果复合体中，峰值出现在2月和8月，谷值出现在4月和11月。侧眼中，峰值出现在3月和9月。松果复合体和侧眼之间血清素浓度的比较表明，在沙隐虫阶段，这些器官中的血清素浓度相似，而在变态期和成年期，侧眼中的血清素浓度显著更高。松果体器官和侧眼中观察到的血清素季节性变化的生理意义以及环境因素在其调控中的重要性仍有待确定，需要进一步研究。
