• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chronobiology international >Circadian Rhythms of Locomotor Activity in the Nile Tilapia Oreochromis niloticus
【24h】

Circadian Rhythms of Locomotor Activity in the Nile Tilapia Oreochromis niloticus

机译：尼罗罗非鱼尼罗罗非鱼运动能力的昼夜节律

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Behavioral rhythms of the Nile tilapia were investigated to better characterize its circadian system. To do so, the locomotor activity patterns of both male and female tilapia reared under a 12:12h light-dark (LD) cycle were studied, as well as in males the existence of endogenous rhythmicity under free-running conditions (DD and 45min LD pulses). When exposed to an LD cycle, the daily pattern of activity differed between individuals: some fish were diurnal, some nocturnal, and a few displayed an arrhythmic pattern. This variability would be typical of the plastic circadian system of fish. Moreover, reproductive events clearly affected the behavioral rhythms of female tilapia, a mouth-brooder teleost species. Under DD, 50% (6 of 12) of male fish showed circadian rhythms with an average period () of 24.10.2h, whereas under the 45min LD pulses, 58% (7 of 12) of the fish exhibited free-running activity rhythms with an average of 23.90.5h. However, interestingly in this case, activity was always confined to the dark phase. Furthermore, when the LD cycle was reversed, a third of the fish showed gradual resynchronization to the new phase, taking 7-10 days to be completely re-entrained. Taken together, these results suggest the existence of an endogenous circadian oscillator that controls the expression of locomotor activity rhythms in the Nile tilapia, although its anatomical localization remains unknown.
机译：对尼罗罗非鱼的行为节律进行了研究，以更好地表征其昼夜节律系统。为此，研究了在12：12h的明暗（LD）周期下饲养的雄性和雌性罗非鱼的运动能力模式，以及雄性在自由行驶条件下（DD和45min LD）存在内源性节律脉冲）。当暴露于LD周期时，个体之间的日常活动模式有所不同：有些鱼是昼夜运动的，有些是夜行性的，有些则表现为心律不齐。这种可变性将是鱼类塑性昼夜节律系统的典型特征。此外，生殖事件明显影响雌性罗非鱼的行为节律。在DD下，50％（12中的6）雄性鱼表现出昼夜节律，平均周期为（24.10.2h），而在LD脉冲为45min时，58％（12中的7）的鱼表现出自由活动节律平均23.90.5h。然而，有趣的是，在这种情况下，活动始终限于黑暗阶段。此外，当LD周期逆转时，三分之一的鱼显示逐渐重新同步到新阶段，需要7-10天才能完全重新夹带。两者合计，这些结果表明存在内源性昼夜节律振荡器，其控制尼罗罗非鱼中运动活动节律的表达，尽管其解剖学定位仍然未知。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号