CAREER: Using Otolith Chemistry to Reveal the Life History of Antarctic Toothfish in the Ross Sea, Antarctica: Testing Fisheries and Climate Change Impacts on a Top Fish Predator
职业:利用耳石化学揭示南极洲罗斯海南极齿鱼的生活史:测试渔业和气候变化对顶级鱼类捕食者的影响
基本信息
- 批准号:2141555
- 负责人:
- 金额:$ 80.1万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:2022
- 资助国家:美国
- 起止时间:2022-05-01 至 2027-04-30
- 项目状态:未结题
- 来源:
- 关键词:
项目摘要
The Ross Sea, Antarctica, is one of the last large intact marine ecosystems left in the world, yet is facing increasing pressure from commercial fisheries and environmental change. It is the most productive stretch of the Southern Ocean, supporting an array of marine life, including Antarctic toothfish – the region’s top fish predator. While a commercial fishery for toothfish continues to grow in the Ross Sea, fundamental knowledge gaps remain regarding toothfish ecology and the impacts of toothfish fishing on the broader Ross Sea ecosystem. Recognizing the global value of the Ross Sea, a large (2 million km2) marine protected area was adopted by the multi-national Commission for the Conservation of Antarctic Marine Living Resources in 2016. This research will fill a critical gap in the knowledge of Antarctic toothfish and deepen understanding of biological-physical interactions for fish ecology, while contributing to knowledge of impacts of fishing and environmental change on the Ross Sea system. This work will further provide innovative tools for studying connectivity among geographically distinct fish populations and for synthesizing and assessing the efficacy of a large-scale marine protected area. In developing an integrated research and education program in engaged scholarship, this project seeks to train the next generation of scholars to engage across the science-policy-public interface, engage with Southern Ocean stakeholders throughout the research process, and to deepen the public’s appreciation of the Antarctic. A major research priority among Ross Sea scientists is to better understand the life history of the Antarctic toothfish and test the efficacy of the Ross Sea Marine Protected Area (MPA) in protecting against the impacts of overfishing and climate change. Like growth rings of a tree, fish ear bones, called otoliths, develop annual layers of calcium carbonate that incorporates elements from their environment. Otoliths offer information on the fish’s growth and the surrounding ocean conditions. Hypothesizing that much of the Antarctic toothfish life cycle is structured by ocean circulation, this research employs a multi-disciplinary approach combining age and growth work with otolith chemistry testing, while also utilizing GIS mapping. The project will measure life history parameters as well as trace elements and stable isotopes in otoliths in three distinct sets collected over the last four decades in the Ross Sea. The information will be used to quantify the transport pathways Antarctic toothfish use across their life history, and across time, in the Ross Sea. The project will assess if toothfish populations from the Ross Sea are connected more widely across the Antarctic. By comparing life history and otolith chemistry data across time, the researchers will assess change in life history parameters and spatial dynamics and seek to infer if these changes are driven by fishing or climate change. Spatially mapping of these data will allow an assessment of the efficacy of the Ross Sea MPA in protecting toothfish and where further protections might be needed.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
南极洲罗斯海是世界上仅存的大型完整海洋生态系统之一,但面临着来自商业渔业和环境变化的越来越大的压力。它是南大洋生产力最高的海域,支持着一系列海洋生物。包括南极齿鱼——该地区的顶级鱼类捕食者。虽然罗斯海的齿鱼商业捕捞持续增长,但有关齿鱼生态和齿鱼捕捞对更广泛的罗斯海生态系统的影响的基本知识仍然存在。 2016年,南极海洋生物资源保护多国委员会通过了罗斯海的一个大型(200万平方公里)海洋保护区。这项研究将填补南极洋枪鱼知识的关键空白并加深了解这项工作将进一步提供创新工具,用于研究不同地理鱼类种群之间的连通性以及综合和评估鱼类生态学的有效性。在制定参与型学术的综合研究和教育计划时,该项目旨在培训下一代学者参与科学-政策-公共界面,在整个研究过程中与南大洋利益相关者进行接触,加深公众对南极的了解 罗斯海科学家的一个主要研究重点是更好地了解南极齿鱼的生活史并测试罗斯海海洋保护区 (MPA) 在防止过度捕捞影响方面的功效。和气候变化。就像树的年轮一样,鱼的耳骨(称为耳石)会形成年度碳酸钙层,其中含有来自环境的元素。耳石提供了有关鱼类生长和周围海洋条件的信息。该研究以海洋环流为结构,采用多学科方法,将年龄和生长工作与耳石化学测试相结合,同时还利用地理信息系统绘图来测量生命史参数以及微量元素和稳定物。过去四十年在罗斯海收集的三组不同的耳石中的同位素这些信息将用于量化南极齿鱼在其整个生命史和时间范围内在罗斯海使用的运输途径。通过比较不同时期的生活史和耳石化学数据,来自罗斯海的齿鱼种群之间的联系更加广泛,研究人员将评估生活史参数和空间动态的变化,并试图推断这些变化是否是由捕鱼或气候驱动的。这些数据的空间映射将有助于评估罗斯海海洋保护区在保护犬牙鱼方面的功效以及可能需要进一步保护的地方。该奖项是 NSF 的法定使命,并通过使用基金会的智力价值和评估进行评估,被认为值得支持。更广泛的影响审查标准。
项目成果
期刊论文数量(0)
专著数量(0)
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会议论文数量(0)
专利数量(0)
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Cassandra Brooks其他文献
Taking climate-smart governance to the high seas
将气候智能型治理引入公海
- DOI:
- 发表时间:
2024 - 期刊:
- 影响因子:56.9
- 作者:
Catarina Frazão Santos;T. Agardy;Cassandra Brooks;K. Gjerde;Cymie Payne;Lisa M. Wedding;José C. Xavier;Larry B. Crowder - 通讯作者:
Larry B. Crowder
Cassandra Brooks的其他文献
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{{ truncateString('Cassandra Brooks', 18)}}的其他基金
Collaborative Research: ORCC: Understanding Organismal Behavioral Responses to Climate Change to Forecast Eco-evolutionary Dynamics of Albatrosses Populations
合作研究:ORCC:了解生物体对气候变化的行为反应以预测信天翁种群的生态进化动态
- 批准号:
2222058 - 财政年份:2023
- 资助金额:
$ 80.1万 - 项目类别:
Standard Grant
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