Physiological and behavioural aspects of exercise in fish

动物在不同的栖息地中使用许多运动策略来生存。许多因素(例如，捕食者与猎物的相互作用)具有深远的生态重要性，并在很大程度上取决于鱼的游泳能力。在过去的几十年里，大量的研究集中于确定与鱼类运动相关的生理机制(例如，能量燃料使用模式、恢复过程)，一些努力描述了物种对疲惫运动的反应差异。最近，研究人员表明，在对运动的生理反应中，存在大量的种内变异性，这种变异性几乎与物种之间的变异性一样大。然而，鱼类物种可变性的潜在原因还不是很清楚。我的研究将集中在影响运动后恢复过程的因素(如温度)，以及最终可能解释鱼类运动反应的种内差异的潜在机制。我将具体研究运动后行为(即行为体温调节--跟踪温度以降低新陈代谢成本的能力)和个体发育(即发育)对鱼类运动后过程的作用。研究人员最近提出，这些因素在描述这种可变性方面可能很重要。我还将评估一种独特的鱼类--鲟鱼--的游泳行为和生理。我的实验方法包括代谢物分析、行为评估和呼吸测量技术的应用。我的最终目标是更好地了解导致鱼类对运动的生理反应的巨大种内差异的潜在过程/机制。我提议的研究是独一无二的，因为它们将研究行为和运动后恢复过程之间的关系。此外，这些研究将集中在鱼类新陈代谢的发育和可塑性上。

Animals use many locomotor strategies for survival in various habitats. Many factors (e.g., predator-prey interactions) are of profound ecological importance and depend heavily on a fish's ability to swim. Over the past few decades, a significant amount of research has focused on determining the physiological mechanisms (e.g., patterns of energy fuel use, recovery processes) associated with exercise in fish, with some effort describing species differences in the response to exhaustive exercise. More recently, researchers have shown that substantial intraspecific variability exists in the physiological response to exercise, and that this variability is almost as great as the variability noted between species. However, the underlying cause of this within species variability in fish is not well known. My research will focus on factors (e.g., temperature) that influence the post-exercise recovery process, and ultimately the underlying mechanisms that may account for the intraspecific variability in the exercise response in fish. I will specifically examine the roles of post-exercise behaviour (i.e., behavioural thermoregulation- the ability to track temperatures to reduce metabolic costs) and ontogeny (i.e., development) on the post-exercise processes in fish. Researchers have recently suggested that these factors may be important in describing the variability. I will also assess the swimming behaviour and physiology of a unique group of fish, the sturgeons. My experimental approach involves the analysis of metabolites, assessment of behaviour and utilization of respirometric techniques. My ultimate goal is to gain a better understanding of the underlying processes/mechanisms that account for the enormous intraspecific variation in the physiological response to exercise in fish. My proposed studies are unique in that they will examine the relationship between behaviour and post-exercise recovery processes. In addition, these studies will focus on the development and plasticity of metabolism in fish.