基于高分辨率耳石 δ18O 图谱和流体力学模型的鱼类洄游史简易可视化技术

IF 5.1 2区 地球科学 Q1 LIMNOLOGY
Tatsuya Sakamoto
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引用次数: 0

摘要

耳石中的氧稳定同位素(δ18O)有助于推断海洋鱼类的洄游。然而,由于耳石中的δ18O受两个参数(温度和环境水的δ18O)的影响,当这两个参数都不恒定时,其解释就变得很有挑战性。在此,我介绍一种简单的方法,利用水动力模型从高分辨率耳石δ18O年表中直观地显示潜在的洄游历史。通过预测潜在耳石δ18O的分布,即根据建模的温度和盐度分布预测耳石δ18O等值线,并将其与观测值进行比较,可以推断出鱼类可能的洄游地点。北太平洋西部地区沙丁鱼幼鱼的演示准确地再现了其季节性向北洄游的过程。预测的地点与鱼卵和幼鱼的取样调查结果显示一致,并正确地接近了捕获鱼类的地点。本研究提出的方法建议和成功演示有助于规划未来利用碳酸盐δ18O值进行的clerochronology研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Simple visualization of fish migration history based on high‐resolution otolith δ18O profiles and hydrodynamic models
Oxygen‐stable isotope (δ18O) in otoliths has been useful to infer marine fish migrations. However, because otolith δ18O is affected by two parameters, temperature and δ18O of ambient water, its interpretation becomes challenging when neither of them is constant. Here, I describe a simple method using hydrodynamic models to visualize potential migration histories from high‐resolution otolith δ18O chronologies. By predicting the distribution of potential otolith δ18O, that is, otolith δ18O isoscape from modeled temperature and salinity distributions and comparing these with observed values, possible fish locations can be inferred. The demonstration of sardine juveniles in the western North Pacific region reproduced their seasonal northward migrations accurately. The predicted locations were consistent with the results of sampling surveys of eggs and juveniles and correctly approached the point where fish were caught. The methodological recommendations and the successful demonstration in this study may help in planning future sclerochronology research using carbonate δ18O values.
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来源期刊
CiteScore
10.00
自引率
3.80%
发文量
63
审稿时长
25 weeks
期刊介绍: Limnology and Oceanography Letters (LO-Letters) serves as a platform for communicating the latest innovative and trend-setting research in the aquatic sciences. Manuscripts submitted to LO-Letters are expected to present high-impact, cutting-edge results, discoveries, or conceptual developments across all areas of limnology and oceanography, including their integration. Selection criteria for manuscripts include their broad relevance to the field, strong empirical and conceptual foundations, succinct and elegant conclusions, and potential to advance knowledge in aquatic sciences.
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