Physiological and behavioural aspects of exercise in fish

动物使用许多运动策略在不同的栖息地生存。 许多因素（例如，捕食者与猎物之间的相互作用）具有深远的生态重要性，并且在很大程度上取决于鱼的游泳能力。 在过去的几十年里，大量的研究集中在确定生理机制（例如，能量燃料的使用模式，恢复过程）与鱼类的运动，与一些努力描述物种的差异，在响应力竭运动。 最近，研究人员已经表明，在对运动的生理反应中存在大量的种内变异性，并且这种变异性几乎与物种之间的变异性一样大。 然而，这在鱼类物种变异的根本原因是不为人所知。 我的研究将集中在因素（例如，温度），影响运动后的恢复过程，并最终的潜在机制，可能占种内变异的鱼类运动反应。 我将具体研究运动后行为的作用（即，行为温度调节-跟踪温度以降低代谢成本的能力）和个体发育（即，发展）对鱼类运动后的过程。 研究人员最近提出，这些因素在描述变异性方面可能很重要。我还将评估一种独特的鱼类鲟鱼的游泳行为和生理学。 我的实验方法包括代谢物的分析，行为的评估和呼吸技术的利用。 我的最终目标是更好地了解导致鱼类对运动的生理反应存在巨大种内差异的潜在过程/机制。 我提出的研究是独一无二的，因为他们将研究行为和运动后恢复过程之间的关系。 此外，这些研究将侧重于鱼类新陈代谢的发展和可塑性。

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.