Japan JSPS Program: Direct Determination of the Metabolic Costs of Activity, Including Migration, in Adult Masu and Sockeye Salmon

该奖项为日本北海道大学吉尔·b·k·伦纳德博士提供为期24个月的日本科学促进会（JSPS）博士后奖学金。伦纳德博士将与托谷湖站站长上田浩博士合作，开展一项名为“直接确定成年马苏和红鲑鱼活动（包括迁徙）的代谢成本”的研究项目。本研究将在湖泊模型系统中评估马苏鲑鱼和红鲑鱼个体迁移的相对代谢成本。在动物中，迁徙过程是一种常见的、能量昂贵的生活史策略，迁徙的进化与它们对异质环境的生理适应能力有关。洄游鱼类在生态和商业上都是重要的物种，它们的生存依赖于成功的洄游，但与海洋生物相比，成年鲑类洄游的能量成本——这是生命史策略进化发展的一部分——尚未得到详细的研究。在研究期间，将用肌电图发射器对动物进行无线电标记，并比较非迁徙期和迁徙期的活动水平。此外，将测量生化代谢和激素参数，以描述从非迁移到迁移的任何直接影响，并确定生化变化与活动变化之间的关系。拟议的研究结果将首次在实地情况下对成年鲑类的洄游所需能量与非洄游活动成本进行综合评价。＊＊＊

Leonard 9703681 This award supports a 24 month Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowship for Dr. Jill B.K. Leonard at the University of Hokkaido, Abuta, Japan. Dr. Leonard will work with Dr. Hiroshi Ueda, Director of the Toya Lake Station, on a research project entitled, "Direct Determination of the Metabolic Costs of Activity, Including Migration, in Adult Masu and Sockeye Salmon." The proposed research will evaluate the relative metabolic cost of migration in individual adult Masu and Sockeye salmon in a lacustrine model system. The migration process is a common, energetically expensive life-history strategy among animals, and the evolution of migration is linked to their ability to physiologically adapt to a heterogeneous environment. Migratory fish are ecologically and commercially important species that are dependent upon successful migration for survival, but the energetic cost of migration - integral to the evolutionary development of life- history strategies - in adult salmonids relative to oceanic life has not been studied in detail. During the research, animals will be radio-tagged with electromyographic transmitters and the activity levels between non-migratory and migratory periods will be compared. Additionally, biochemical metabolic and hormonal parameters will be measured in order to describe any direct effects of the shift from non-migrant to migrant and the relationship between biochemical changes and changes in activity will be determined. Results of the proposed research will provide the first comprehensive evaluation in a field situation of the energy required for migration relative to non-migratory activity costs on an individual basis in adult salmonids. ***