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首页> 外文期刊>Estuarine Coastal and Shelf Science >The after-effects of hypoxia exposure on the clam Ruditapes philippinarum in Omaehama beach, Japan
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The after-effects of hypoxia exposure on the clam Ruditapes philippinarum in Omaehama beach, Japan

机译：缺氧暴露对日本Omaehama海滩上的菲律宾蛤仔Ruditapes的影响

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摘要

A number of reports describe the impact of hypoxic conditions on the manila clam Ruditapes philippinarum, but few deal with the after-effects of hypoxia on this clam species. Exposure experiments were carried out on the manila clam under conditions of low dissolved oxygen (DO, 0.5 mg/L). In the first exposure experiment (i.e., 3 days of hypoxia), a substantial change in mortality rate, glycogen content, and clearance rate was not observed in the period following the hypoxia. However, in the second exposure experiment (i.e., an additional 3 days of hypoxia following recovery from the first exposure), the mortality rate was significantly increased relative to that of the first exposure experiment, and glycogen content underwent a long-term decline. At the end of the experimental period, subsequent to the 2 exposures to hypoxia, the clearance rate had decreased until it was 77% of that of the normal manila clams unexposed to hypoxia. Moreover, the clearance rate was unable to recover following the second exposure. Thus, when the manila clams were repeatedly exposed to hypoxic conditions, the surviving individuals showed a residual disability, as reflected in the increased mortality and unrecovered clearance capacity. Afterward, the after-effects of hypoxia exposure on the clearance function of the manila clams in Omaehama beach, Japan, were assessed using the experimental results and the observed data. An examination of the effects of the residual disability showed a more extensive decrease in filtering capacity when a formula accounting for residual disability was used rather than a standard one. The clearance volume using our new formula was 75% of that of a standard formula. The formula equations that have been used up until now have only evaluated whether the manila clams die. However, the surviving individuals have a residual disability, and our formula indicates this effect would cause a further decline in the purification function of the beach.
机译：许多报告描述了低氧条件对菲律宾蛤仔Ruditapes philippinarum的影响，但很少有研究探讨低氧对这种蛤species物种的后遗症。在低溶解氧（DO，0.5 mg / L）的条件下，对马尼拉蛤进行了暴露实验。在第一个暴露实验（即缺氧3天）中，在缺氧后的一段时间内未观察到死亡率，糖原含量和清除率的实质性变化。但是，在第二次暴露实验中（即，第一次暴露恢复后又缺氧3天），相对于第一次暴露实验，死亡率显着提高，糖原含量长期下降。在实验期结束时，在两次低氧暴露之后，清除率一直下降，直到清除率是未暴露于低氧的正常马尼拉蛤的清除率的77％。此外，第二次接触后清除率无法恢复。因此，当马尼拉蛤repeatedly反复暴露于低氧条件下时，幸存的个体显示出残废的残疾，这反映在死亡率的增加和清除能力的恢复上。然后，使用实验结果和观察到的数据评估了低氧暴露对日本Omaehama海滩马尼蛤的清除功能的影响。残留残障影响的检查显示，当使用解释残障率的公式而不是标准残渣公式时，过滤能力的下降幅度更大。使用我们的新配方的间隙体积为标准配方的间隙体积的75％。直到现在为止使用的公式方程式仅评估了马尼拉蛤die是否死亡。但是，幸存的个体仍有残障，我们的公式表明这种影响将导致海滩的净化功能进一步下降。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2013年第1期|50-56|共7页
  • 作者

    Yasunori Kozuki; Ryoichi Yamanaka; Maya Matsushige; Azusa Saitoh; Sosuke Otani; Tatsunori Ishida;

  • 作者单位

    Ecosystem Design, Institute Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan;

    Ecosystem Design, Institute Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan;

    Department of Ecosystem Engineering, College of Earth and Life Environmental Engineering, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan;

    Department of Ecosystem Engineering, College of Earth and Life Environmental Engineering, Graduate School of Advanced Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan;

    Research Center for Environmental Quality Management, Kyoto University, 1-2 Yumihama, Otsu, Shiga 520-0811, Japan;

    Ecosystem Design, Institute Technology and Science, The University of Tokushima, 2-1 Minamijosanjima-cho, Tokushima 770-8506, Japan;

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  • 正文语种 eng
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  • 关键词

    omaehama beach; ruditapes philippinarum; hypoxia; clearance rate; glycogen; mortality;

    机译：omaehama海滩菲律宾芸香缺氧清除率;糖原死亡;

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