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首页> 外文期刊>Marine biology >Scales of variation in otolith elemental chemistry of juvenile staghorn sculpin (Leptocottus armatus) in three Pacific Northwest estuaries
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Scales of variation in otolith elemental chemistry of juvenile staghorn sculpin (Leptocottus armatus) in three Pacific Northwest estuaries

机译：西北太平洋三个河口幼小鹿角的耳石元素化学变化量表

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摘要

Although distinct otolith elemental signatures are often observed in fish collected from different estuaries, significant differences are also observed among sites within estuaries. Variation at these smaller spatial scales is not well quantified and has the potential to lead to inappropriate interpretations of otolith elemental data. To quantify variation at multiple scales, the otolith elemental composition (Mg:Ca, Mn:Ca, Sr:Ca, Ba:Ca, and Pb:Ca) of juvenile staghorn sculpin {Leptocottus armatus Girard, 1854) collected from five sites within three estuaries, the Columbia River (two sites) and Coos Bay (one site), Oregon, and Humboldt Bay, California (two sites), was examined. Using laser ablation-inductively coupled plasma mass spectrometry, each otolith was sampled at three zones: (1) within the primordium, which represents the egg and early larval periods; (2) at the outer edge, which represents the juvenile period just prior to collection; and (3) midway between the primordial and edge samples, which represents the late larval and early juvenile period. There were significant differences in otolith metal-to-calcium ratios at all scales examined. Using multi-element otolith signatures, fish were classified to estuary and site within estuary with relatively high levels of accuracy (av = 70-90%). The largest differences in metal-to-calcium ratios were observed between sites within estuaries ( ＜ 5 km apart) and the smallest differences were observed among otolith zones. Variation in otolith chemistry may be used to provide information on probable habitat use by estu-arine fish but studies must be carefully designed.
机译：尽管通常在从不同河口收集的鱼类中观察到耳石元素特征，但在河口内各地点之间也观察到了显着差异。这些较小的空间尺度上的变化没有得到很好的量化，并且可能导致对耳石元素数据的不恰当解释。为了量化多尺度的变化，从三个地点中的五个地点收集了幼年的鹿角tag鱼（Leptocottus armatus Girard，1854）的耳石元素组成（Mg：Ca，Mn：Ca，Sr：Ca，Ba：Ca和Pb：Ca）在河口，检查了俄勒冈州的哥伦比亚河（两个站点）和库斯湾（一个站点），以及加利福尼亚的洪堡湾（两个站点）。使用激光烧蚀-电感耦合等离子体质谱法，每个耳石在三个区域采样：（1）在原基内，代表卵和幼虫早期； （2）在外缘，代表即将采集之前的少年时期； （3）原始样本和边缘样本之间的中点，代表幼虫后期和少年早期。在所有检查的尺度下，耳石中金属钙的比例均存在显着差异。使用多元素耳石签名，将鱼分类到河口和河口内的地点，具有相对较高的准确度（av = 70-90％）。在河口（相距＜5 km）之间的站点之间，金属钙比的差异最大，而在耳石区之间的差异最小。耳石化学的变化可用于提供有关河豚鱼可能使用的栖息地的信息，但研究必须精心设计。

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  • 来源
    《Marine biology》 |2007年第2期|483-494|共12页
  • 作者

    J. A. Miller;

  • 作者单位

    Coastal Oregon Marine Experiment Station, Hatfield Marine Science Center, Department of Fisheries and Wildlife, Oregon State University, 2030 SE Marine Science Drive, Newport, OR 97365, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境生物学;
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