温度偏好的每日节奏在夜间和盲鱼中保持不变
F Conti1, E Gatto2, G de Alba3
1Department of Physiology, Faculty of Biology, University of Murcia, 30100, Murcia, Spain; Department of Life Sciences and Biotechnology, Faculty of Biology, University of Ferrara, 44121, Ferrara, Italy.
Journal of thermal biology
|November 26, 2025
概括
鱼在偏好的温度下表现出日常节律,白天寻找更温暖的地方,晚上寻找更凉爽的地方. 这种保存的热选择行为主要由昼夜时钟控制,而不仅仅是光线线索.
科学领域:
- 时间生物学 时间生物学
- 动物行为 动物行为
- 生态生态学 生态生态学
背景情况:
- 循环时钟同步生物过程与环境线索,如光和温度.
- 热体鱼通过调整体温以与环境周期相匹配来进行行为温度调节.
- 夜行和盲鱼的每日热偏好模式仍未得到充分探索.
研究的目的:
- 研究夜生活 (Tinca tinca,Ameiurus melas) 和盲洞穴鱼 (Astyanax mexicanus,Phreatichthys andruzzii) 热偏好的昼夜节律.
- 确定热选择模式是否在白天活动,夜间活动和盲目鱼类物种之间有所不同.
- 探索昼夜控制与光线暗示在鱼的热偏好中的作用.
主要方法:
- 使用具有水平热梯度的多腔,在27天内评估鱼类的热偏好.
- 鱼类暴露在不同的光/黑暗 (LD,DL) 和恒定的黑暗 (DD) 条件下.
- 在四种鱼类中监测温度选择的每日变化.
主要成果:
- 所有测试的物种都表现出显著的热偏好日常节律,有利于白天更高的温度和晚上更低的温度.
- 夜生活物种在持续的黑暗中保持节奏温度选择,表明昼夜控制.
- 盲洞鱼物种在不断的黑暗中变得节律失常,这表明它们依赖光线线或丧失昼夜功能.
结论:
- 鱼类中存在着保存在的热选择的每日节奏,独立于它们的活动模式 (白天/夜间).
- 循环节控制在调节鱼类热偏好节奏方面发挥着主要作用.
- 这些发现可以为水产养殖实践提供信息,通过模仿自然热循环来提高鱼类福利.
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