Plasticity of Life History Traits: Arctic Charr as a Paradigm

生命史特征的可塑性：北极红点鲑作为范例

• 批准号: 9123017
• 负责人: Richard Radtke
• 金额: $ 38.07万
• 依托单位: University of Hawaii
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-05-15 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123017&HistoricalAwards=false
• 关键词: Plasticity; Life; History; Traits; Arctic

Due to the disparate nature of environmental conditions in oceanic and freshwater systems, the characteristics of these environments strongly influence total population structure of species with plastic life history patterns. To conduct meaningful research on these processes, it is essential to identify which life history stages and/or environmental events are significant. The Arctic charr (Salvelinus alpinus L.) is characterized by a variety of morphological types. These morphs appear to be reflect differences in environmental conditions. This project will investigate the relationships between morph, growth and environmental history. This research will apply novel analytic techniques to evaluate the periods in the life history of the Arctic charr. The otoliths of fish have incorporated within their structural and chemical components a large amount of life history and physiological information. Age, growth rate and environmental perturbations will be determined from otolith microstructure, while environmental trends in the history of an individual will be determined through elemental composition analyses of otoliths. The result of these investigations will be a comprehensive and detailed understanding of physiologically and ecologically induced changes in otolith microstructure and chemical composition. This knowledge is vital to an understanding of the processes foundational to adaptable life history patterns and should make it possible to link growth and migration to nutritional and environmental occurrences.

由于海洋环境条件的不同性质， 和淡水系统，这些环境的特征 强烈影响物种的总种群结构， 可塑性生活史模式 进行有意义的研究 这些过程中，重要的是要确定哪些生活史 阶段和/或环境事件是重要的。 北极 红点鲑（Salvelinus alpinus L.）其特点是多种多样的 形态类型 这些变体似乎反映了 in environmental环境conditions条件. 该项目将调查 形态、生长和环境历史之间的关系。 这项研究将采用新的分析技术来评估 北极红点鲑生活史上的各个时期 的耳石 鱼类在其结构和化学成分中 成分大量的生活史和生理 信息. 年龄、生长率和环境扰动 将从耳石显微结构中确定，而 个人历史上的环境趋势 通过耳石的元素组成分析确定。 这些调查的结果将是一个全面的， 详细了解生理和生态 诱发耳石微结构和化学变化 混合物. 这一知识对于理解 适应性生活史模式的基础过程， 应该能够将增长和移徙联系起来， 营养和环境事件。