The influence of water, diet, and temperature on 87Sr/86Sr in fin spines of juvenile Atlantic Sturgeon Acipenser oxyrinchus oxyrinchus

IF 1.8 3区 生物学 Q3 ECOLOGY
Joshua J. Neary , Brenda M. Pracheil , Rinat I. Gabitov , Menghe H. Li , Peter J. Allen
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引用次数: 0

Abstract

Analysis of microchemistry in fish fin spines offers a non-lethal approach to address key questions about life history specific movement and habitat use. Reconstruction of life history is based on chemical changes within calcified structures with an underlying assumption of elemental incorporation relative to environmental concentration. However, information on the relative contributions of water and diet to trace elements in calcified structures of fishes, including fin spines, is limited. Strontium (Sr) is commonly used in trace element studies because of its predictable changes within watersheds, with recent applications showing utility of 87Sr/86Sr for greater spatial resolution. In this study we evaluated the influence of water and diet 87Sr/86Sr on pectoral fin spines of Atlantic Sturgeon A. oxyrinchus oxyrinchus in controlled laboratory experiments. To understand the extent to which water and diet 87Sr/86Sr contribute to levels in fin spines, we exposed fish to one of four treatments for 12 weeks; a control, water spiked with 87Sr, and diet spiked with medium and high levels of 87Sr. To determine the amount of time it takes to elicit a shift in fin spine 87Sr/86Sr following a change in 87Sr/86Sr, fish were maintained in water- or diet-spiked treatments for up to 6 weeks. Lastly, we investigated how temperature may influence fin spine 87Sr/86Sr by holding fish at either 16 °C or 24 °C for 12 weeks. Our experiments indicated water is the primary contributor of 87Sr/86Sr levels in fin spines of Atlantic Sturgeon, and these levels shifted 1 week and 12 weeks following changes in water and diet, respectively. Water temperature did not have an effect on 87Sr/86Sr fin spine chemistry, although sample size was low (n = 3). These results provide guidance for interpretation of 87Sr/86Sr in pectoral fin spines of sturgeon and indicate usefulness of the technique for retrospectively estimating movement and habitat use.

水、饲料和温度对大西洋鲟幼鱼鳍棘87Sr/86Sr的影响
分析鱼类鳍刺中的微量化学成分为解决有关生活史、特定运动和栖息地利用的关键问题提供了一种非致命的方法。生命史的重建是基于钙化结构内的化学变化,其基本假设是与环境浓度相关的元素结合。然而,关于水和饮食对鱼类钙化结构(包括鳍刺)中微量元素的相对贡献的信息是有限的。锶(Sr)通常用于微量元素研究,因为它在流域内的变化是可预测的,最近的应用表明87Sr/86Sr具有更高的空间分辨率。通过室内对照试验,研究了水和饲料87Sr/86Sr对大西洋鲟胸鳍棘的影响。为了了解水和饮食中87Sr/86Sr对鳍棘水平的影响程度,我们将鱼暴露在四种处理中的一种中12周;作为对照,水中添加87Sr,饮食中添加中、高浓度87Sr。为了确定在87Sr/86Sr变化后引起鳍87Sr/86Sr变化所需的时间,将鱼维持在水或饮食中长达6周。最后,我们通过在16°C或24°C的温度下保存12周来研究温度对鳍87Sr/86Sr的影响。我们的实验表明,水是大西洋鲟鱼鳍棘中87Sr/86Sr水平的主要贡献者,这些水平分别在水和饮食变化后1周和12周发生变化。水温对87Sr/86Sr鳍的化学成分没有影响,尽管样本数量很少(n = 3)。这些结果为解释鲟鱼胸鳍中87Sr/86Sr的含量提供了指导,并表明该技术对回顾性估计运动和栖息地利用的有用性。
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来源期刊
Journal of Experimental Marine Biology and Ecology
Journal of Experimental Marine Biology and Ecology 生物-海洋与淡水生物学
CiteScore
4.30
自引率
0.00%
发文量
98
审稿时长
14 weeks
期刊介绍: The Journal of Experimental Marine Biology and Ecology provides a forum for experimental ecological research on marine organisms in relation to their environment. Topic areas include studies that focus on biochemistry, physiology, behavior, genetics, and ecological theory. The main emphasis of the Journal lies in hypothesis driven experimental work, both from the laboratory and the field. Natural experiments or descriptive studies that elucidate fundamental ecological processes are welcome. Submissions should have a broad ecological framework beyond the specific study organism or geographic region. Short communications that highlight emerging issues and exciting discoveries within five printed pages will receive a rapid turnaround. Papers describing important new analytical, computational, experimental and theoretical techniques and methods are encouraged and will be highlighted as Methodological Advances. We welcome proposals for Review Papers synthesizing a specific field within marine ecology. Finally, the journal aims to publish Special Issues at regular intervals synthesizing a particular field of marine science. All printed papers undergo a peer review process before being accepted and will receive a first decision within three months.
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