Physiological Basis of Metabolism and Activity: Phenotypic and Evolutionary Plasticity of Locomotor Performance Capacity

水温是一个关键的环境变量，在决定鱼类的分布和丰度方面起着重要作用。温度的变化会改变肌肉功能，从而影响逃跑速度和对捕食者的脆弱性。本项目将研究温度、温度变化和捕食对鱼类逃生行为的影响。通过对几种鲤科鱼类的逃逸行为进行高速录像，分析其肌肉收缩特性和这些特性的酶基础，研究它们对长期温度变化的适应。同样的技术将用于检查历史（多代）暴露于不同水平的捕食对鱼类种群的影响，以确定暴露于捕食是否会导致运动表现能力的差异。这项研究将为预测水温对自然界鱼类表现的可能影响、这些鱼类在长期温度暴露下调整表现的能力以及引入具有新的捕食制度的新地区的鱼类的潜在进化变化提供基础。这一信息对于渔业管理和了解冷血脊椎动物种群如何适应气候变化或活动范围的扩大都很重要。

9420155 Bennett Water temperature is a critical environmental variable that plays a major role in determining the distribution and abundance of fish species. Temperature changes alter muscle function and hence escape speed and vulnerability to predators. This project will examine the effects of temperature, temperature changes and predation on escape behavior of fish. Acclimation to long-term temperature changes will be examined in several species of cyprinid fish by high speed video filming of escape behavior and analysis of muscle contractile properties and the enzymatic bases of those properties. The same techniques will be used to examine the effect of historical (multigenerational) exposure to differing levels of predation on fish populations to determine whether exposure to predation causes divergence in locomotor performance capacities. The research will provide a basis for predicting likely effects of water temperature on stock performance in nature, the ability of those stocks to adjust performance over longer term temperature exposure, and potential evolutionary changes in fish stocks introduced into new areas with new predatory regimes. This information is important to both fisheries management and to understanding how populations of cold-blooded vertebrates may adjust to climate change or range extension.