FAH/REU: The Influence of Environmental and Nutritional Event on Recruitment Variability

鱼类补充量的波动可以由以下因素引起： 死亡率、增长率或 鱼的早期生命阶段的持续时间。 的分析 增长率的变化，这可能是更可靠的， 调查估计死亡率，可以提供重要的 深入了解征聘水平波动的问题。 为了理解招聘，必须确定 变量（生长率、温度、营养）显著 影响幼虫的存活，并随后招募到 成人人口。 微结构耳石分析的使用， 以及耳石和 身体组织，将被用作过去环境的指标 温度和食物条件。 通过执行 控制实验室实验，变量可能会改变 耳石的显微结构和化学成分 耳石和身体组织将被研究。此外，本发明还提供了一种方法， 幼虫的饲养将为 研究生长，喂养，生理和解决期间， 这个重要但难以捉摸的阶段 的细化和 耳石分析的新兴方法的应用将 不仅进一步发展和推进技术，而且将 还为适用的渔业问题提供答案。

Fluctuations in fish recruitment can be precipitated by relatively small variations in mortality rates, growth rates or stage durations in the early life stages of fish. The analyses of growth rate variability which may be more reliable than survey estimation of mortality rates, can provide important insights into the problem of fluctuating recruitment levels. To understand recruitment, it is essential to identify which variables (growth rates, temperature, nutrition) significantly affect larval survival, and subsequent recruitment into the adult population. The use of microstructural otolith analyses, as well as stable isotopic composition of both otoliths and body tissues, will be used as indicators of past environmental temperatures and food conditions. And, through the execution of controlled laboratory experiments, variables which may alter the microstructure of otoliths and the chemical composition of otoliths and of body tissues will be investigated. In addition, the rearing of larvae will provide a unique opportunity for the study of growth, feeding, physiology, and settlement during this important, but elusive phase. The refinement and application of emerging methodologies of otolith analyses will not only further develop and advance the technology, but will also provide answers to applicable fisheries problems.