Otolith-based studies of the thermal ecology of northern salmonids

基于耳石的北方鲑鱼热生态学研究

• 批准号: RGPIN-2016-03627
• 负责人: Power, Michael
• 金额: $ 2.7万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=662543
• 关键词: Otolith; based; studies; thermal; ecology

Research proposed here will focus primarily on the continued study of two iconic Canadian fish species, Arctic charr (Salvelinus alpinus) and Atlantic salmon (Salmo salar), valued as sport and subsistence fisheries and both considered as useful indicators of ecosystem change because of their ecological status as a keystone species in the environments they inhabit. Both species are projected to experience significant negative impacts from climate change. Indeed evidence is mounting that both are already being significantly affected by climate regime shifts either directly as a result of ocean warming or indirectly as a result of distributional shifts of key prey resources. Preparedness to meet the challenges of climate change through the development of mitigative management strategies for these species requires improved knowledge about the thermal ecology of both species relative to that of other possible competitor species such as Brook charr (S. fontinalis). Research proposed here will address that knowledge gap by focusing on studies that aim to: [1] understand differences in temperature use among competing northern salmonids (e.g., Arctic charr, Atlantic salmon, and also Brook charr), the physiological and growth consequences of those differences and how variation among individuals within populations may help buffer the population from the immediate consequences of temperature change; and, [2] improve the oxygen isotope analytical tools available for the study of northern fishes thermal ecology, both past and present, through experimental cross-validation of key assumptions of the techniques used. Studies will, therefore, help to maintain Canadian science at the forefront of the rapidly developing field of otolith stable isotope micro-chemistry. Research will combine cutting-edge laboratory methods with field work to optimize both time and resources. Investigations will be conducted in a number of northern locations along a north-south gradient, including: Baffin Island, Nunavik (northern Quebec) and Nunatsiavut (Labrador). The studies will also contribute significantly to the development of the next generation of trained scientists and resource managers. And for the salmonids studied, the acquired information will improve understanding of functional biological relationships, thereby permitting improved understanding of the implications of ecosystem change and improved science-based stewardship of the affected species.**

这里提出的研究将主要集中在对两种标志性加拿大鱼类物种，北极Charr（Salvelinus alpinus）和大西洋鲑鱼（Salmo Salar）（Salmo Salar）的持续研究，被视为体育和自给自足的渔业，并且都被认为是生态系统的有用指标，因为它们在环境中作为Akeological Schement in Hebiits in hebit。预计这两种物种都会遭受气候变化的重大负面影响。的确，有证据表明，由于海洋变暖或间接由于关键猎物资源的分布转移而导致的，由于海洋变暖或间接而导致的气候政权已经显着影响。通过制定这些物种的缓解管理策略来应对气候变化的挑战，需要提高有关这两种物种的热生态的知识，相对于其他可能的竞争者物种，例如Br​​ook Charr（S. fontinalis）。这里提出的研究将通过关注旨在：[1]了解北部鲑鱼中温度使用差异（例如北极Charr，Atlantic Salmon和Brook Charr）的研究差异来解决该知识差距，以及这些差异的生理和成长后果以及人群中人群中的变异可能会帮助缓解直接变化的直接后果;并且，[2]通过对所使用技术的关键假设进行实验性交叉验证，改善了用于研究北部鱼类热生态学的氧同位素分析工具。因此，研究将有助于将加拿大科学保持在耳石稳定的同位素微化学领域的最前沿。研究将将最先进的实验室方法与现场工作相结合，以优化时间和资源。调查将在南北梯度沿线的许多北部地区进行，其中包括：巴芬岛，努纳维克（魁北克北部）和努纳西亚夫（Nunatsiavut）（拉布拉多）。 这些研究还将为下一代训练有素的科学家和资源经理的发展做出重大贡献。对于研究的鲑鱼，获得的信息将提高对功能生物关系的理解，从而提高人们对生态系统变化的含义的理解，并改善了受影响物种的基于科学的管理。** **