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首页> 外文期刊>Marine ecology progress series >Physiological influences can outweigh environmental signals in otolith microchemistry research
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Physiological influences can outweigh environmental signals in otolith microchemistry research

机译：在耳石微化学研究中，生理影响可能超过环境信号

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摘要

Most studies that infer geographic distributions of fish using otolith microchemistry assume that environmental factors (e.g. temperature, salinity) outweigh intrinsic effects (e.g. size, condition); however, this assumption has not been rigorously tested, particularly in marine fish. Here, we report the results of a long-term experimental study of European plaice Pleuronectes platessa L. and explore relationships between blood plasma and ambient water chemistry over a 12 mo reproductive cycle. Overall, blood plasma was found to be highly regulated, with few elements exhibiting strong, if any, correlation with ambient concentrations. This sets a first order limit on the sensitivity of otolith chemistry to fluctuations in ambient seawater chemistry. The observed temporal, ontogenetic and sex-specific variations in blood plasma elemental concentrations indicated significant physiological influences on elemental uptake and processing mechanisms. Physiological variables exerted relatively strong influences on the uptake and regulation of the softer, more thiophilic elements (Mn, Cu, Zn, Se and Pb), as well as Sr and Ca. By contrast, seasonal and sex-related variations were relatively minor among the hard acid metal ions (Li~+, Mg~(2+), K~+, Rb~+, Ba~(2+)). Overall, plasma elemental concentrations covaried most strongly and consistently with plasma protein concentrations. For this exclusively marine species, seasonal changes in physiology governed intra-annual variations in blood chemistry and, by implication, also regulate ion availability to the otolith. Based on these observations, we recommend that sex and age should be controlled for in future experimental designs using otolith microchemistry to infer stock structure or migration patterns.
机译：大多数使用耳石微化学方法推断鱼类地理分布的研究都假设环境因素（例如温度，盐度）胜过内在影响（例如大小，状况）。但是，这一假设尚未经过严格检验，尤其是在海水鱼类中。在这里，我们报告了欧洲P Pleuronectes platesa L.的长期实验研究结果，并探讨了在12 mo繁殖周期中血浆与环境水化学之间的关系。总的来说，血浆被高度调节，几乎没有元素表现出与环境浓度的强相关性。这对耳石化学对周围海水化学变化的敏感性设置了一个一级极限。在血浆元素浓度中观察到的时间，个体发生和性别特异性变化表明对元素摄取和加工机制的显着生理影响。生理变量对较软，较亲硫的元素（Mn，Cu，Zn，Se和Pb）以及Sr和Ca的吸收和调节产生相对较大的影响。相比之下，季节性和性别相关的变化在硬酸金属离子（Li〜+，Mg〜（2 +），K〜+，Rb〜+，Ba〜（2+））中相对较小。总体而言，血浆元素浓度与血浆蛋白浓度的变化最大且一致。对于这种专门的海洋物种，生理学的季节性变化决定着血液化学的年内变化，并且也暗示着调节耳石的离子利用率。基于这些观察结果，我们建议在将来的实验设计中，应使用otolith微观化学方法来控制性别和年龄，以推断种群结构或迁移方式。

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  • 来源
    《Marine ecology progress series》 |2014年第17期|245-264|共20页
  • 作者

    Anna M. Sturrock; Clive N. Trueman; J. Andy Milton; Colin P. Waring; Matthew J. Cooper; Ewan Hunter;

  • 作者单位

    Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton, Hampshire SO14 3ZH, UK,Institute of Marine Sciences, A317 Earth & Marine Sciences Building, University of California, Santa Cruz, 1156 High Street, Santa Cruz, California 95064, USA;

    Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton, Hampshire SO14 3ZH, UK;

    Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton, Hampshire SO14 3ZH, UK;

    University of Portsmouth, Institute of Marine Sciences, Ferry Road, Eastney, Hampshire PO4 9LY, UK;

    Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton Waterfront Campus, European Way, Southampton, Hampshire SO14 3ZH, UK;

    Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory, Pakefield Road, Lowestoft, Suffolk NR33 0HT, UK;

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  • 正文语种 eng
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  • 关键词

    Trace metals; Blood plasma; Otolith microchemistry; Plaice; Reproductive cycles;

    机译：痕量金属;血浆;耳石微化学;鲽;生殖周期;

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