Balthazart J, Hendrick J C
Laboratoire de Biochimie Générale et Comparée et Laboratoire de Radioimmunologie, Université de Liège, 17, place Delcour, B 4020 Liège, Belgium.
Behav Processes. 1979 Jul;4(2):107-28. doi: 10.1016/0376-6357(79)90027-5.
The daily variations of plasma follicle-stimulating hormone (FSH), luteinizing hormone (LH) and testosterone were studied in three groups of 10-12 male domestic ducks at different times in their reproductive cycle. Rapid and significant changes in the mean plasma hormone levels were observed in each case but no reproducible pattern of daily variation could be defined. Before being submitted to repeated blood sampling, the birds were observed for their social behavior on several days from dawn to dusk. The frequencies of social displays and sexual behavior also changed significantly during the day but, once again, the pattern of changes was different from one case to another. There was, however, some indication that the pattern of daily changes could be a function of the season. The study of the relationships between the daily changes in behavior and in plasma hormone levels revealed several significant positive correlations. The variations in plasma FSH and/or testosterone are correlated with the variations in social displays and sexual behavior. Furthermore the same correlations could be detected in different groups of animals which had otherwise completely different patterns of daily variations. This suggests that the short-term changes in behavior could be controlled by these hormones, but it is still unclear whether the changes in hormone levels can cause behavioral changes within hours rather than the converse.
在三组10 - 12只雄性家鸭处于生殖周期的不同阶段时，研究了血浆促卵泡激素（FSH）、促黄体生成素（LH）和睾酮的每日变化情况。在每种情况下均观察到血浆激素平均水平的快速且显著变化，但无法确定可重复的每日变化模式。在进行重复采血之前，连续几天从黎明到黄昏观察这些鸭子的社会行为。社会展示和性行为的频率在一天中也有显著变化，但同样，变化模式因个体而异。然而，有迹象表明每日变化模式可能是季节的函数。对行为的每日变化与血浆激素水平之间关系的研究揭示了若干显著的正相关。血浆FSH和/或睾酮的变化与社会展示和性行为的变化相关。此外，在具有完全不同每日变化模式的不同动物组中也能检测到相同的相关性。这表明行为的短期变化可能受这些激素控制，但激素水平的变化是否能在数小时内引起行为变化而非相反情况仍不清楚。
