Correlation between reproductive photoresponsiveness and photoregulated locomotor activity in meadow voles.
Correlation between reproductive photoresponsiveness and photoregulated locomotor activity in meadow voles.
复制标题
草甸田鼠生殖光响应性与光调节运动活动之间的相关性。
DOI：
10.1016/0031-9384(93)90046-i
复制
发表时间：
1993
影响因子：
2.9
通讯作者：
Bronson,FH
中科院分区：
文献类型：
--
作者：
Kerbeshian,MC;Bronson,FH
一些啮齿类动物种群中的个体在短日照长度下经历了性腺完全退化，其他个体的性腺几乎不受这种治疗的影响，还有一些个体的反应处于中间状态。表现出这种变异的草地田鼠被用来探索生殖光响应性和光调节运动活动之间的关系。比较了两种极端表型（生殖光响应性与非响应性）的活动模式，首先在短日照长度下，然后在长日照长度下。两种条件下两种表型的日常跑轮活动模式的主要组成部分都是亚电。在这个框架内，生殖光响应田鼠在两种白天的运动活动中主要是夜间活动。相比之下，无反应的个体在任一日长下的活动均未表现出显着的昼夜节律变化。这些结果表明，在野外，具有生殖光反应性和无反应性的个体全年可能具有根本不同的活动模式。此外，数据表明，一些田鼠无法对光周期变化作出生殖反应，可能是由于昼夜节律系统与日长的影响脱钩造成的。
Some rodent populations contain individuals that undergo complete gonadal regression under short day lengths, other individuals whose gonads are little affected by such treatment, and still others that are intermediate in their response. Meadow voles exhibiting this variation were used to explore the relationship between reproductive photoresponsiveness and photoregulated locomotor activity. The activity patterns of the two extreme phenotypes—reproductively photoresponsive vs. nonresponsive—were compared, first under short day lengths and then under long day lengths. The primary component of the daily running wheel activity pattern for both phenotypes under both conditions was ultradian. Within that framework, reproductively photoresponsive voles were predominantly nocturnal in their locomotor activity under both day lengths. In contrast, the nonresponsive individuals showed no significant circadian variation in their activity under either day length. These results suggest that reproductively photoresponsive and nonresponsive individuals may have fundamentally different patterns of activity throughout the year in the wild. Furthermore, the data suggest that the inability of some voles to respond reproductively to variations in photoperiod may be caused by a decoupling of the circadian system from the entraining effects of day length.