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首页> 外文期刊>Marine biology >Stable Isotopes Changes In The Adductor Muscle Of Diseased Bivalve Ruditapes Philippinarum
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Stable Isotopes Changes In The Adductor Muscle Of Diseased Bivalve Ruditapes Philippinarum

机译：患病双壳类菲律宾蛤仔的收视肌中稳定同位素的变化

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In this article, we show how a disease could bias stable isotope analyzes of trophic networks and propose a strategy in the choice of tissues to be analyzed. In the past few years, a new pathology (brown muscle disease or BMD) affecting the posterior adductor muscle of Ruditapes philippinarum has emerged in Arcachon Bay. BMD induces a necrosis of muscle tissues which become infused by conchiolin and hence calcified. As muscle of mollusks are often used for trophic food webs studies through stable isotopic analyzes, this work investigated the effect of BMD on carbon and nitrogen isotopic ratios of anterior and posterior adductor muscles of clams collected in February and August 2007. Infected clams displayed a lower condition index and a posterior adductor muscle δ~(13)C enrichment of 1.2‰ in February and 0.7‰ in August. δ~(15)N of posterior muscles was however not affected by the disease. Anterior muscle of diseased clams remained healthy and displayed the same isotopic signature as both posterior and anterior muscular tissues of healthy clam. Acidification significantly depleted δ~(13)C in posterior muscles of infected clams, suggesting calcification, contrary to anterior muscles of infected clam and to both muscles of healthy clams, where no effect was observed. An X-ray diffractometry analysis confirmed the presence of CaCO_3 (aragonite). Trophic food web studies relying on stable isotope ratios should utilize only healthy animals or anterior adductor muscles when expertise in mollusk pathology is lacking.
机译：在本文中，我们展示了疾病如何使营养网络的同位素分析偏倚，并提出了选择要分析的组织的策略。在过去的几年中，Arcachon湾出现了一种新的病理学（棕色肌肉疾病或BMD），它影响了菲律宾蛤仔的后内收肌。 BMD引起肌肉组织坏死，其被贝壳杉素注入并因此被钙化。由于软体动物的肌肉经常通过稳定的同位素分析用于营养性食物网的研究，因此本研究调查了BMD对2007年2月和2007年8月收集的蛤的前内收肌和后内收肌的碳氮同位素比率的影响。受感染的蛤显示较低状况指数和后内收肌δ〜（13）C的富集在2月为1.2‰，8月为0.7‰。后部肌肉的δ〜（15）N不受该疾病的影响。患病蛤s的前肌保持健康，并表现出与健康蛤的前后肌组织相同的同位素特征。酸化显着耗尽了受感染蛤的后肌中的δ〜（13）C，表明钙化，与受感染蛤lam的前肌和健康蛤both的两块肌肉相反，没有观察到作用。 X射线衍射分析证实了CaCO_3（文石）的存在。在缺乏软体动物病理学知识的情况下，依赖稳定同位素比率的营养性食物网研究应仅利用健康的动物或前内收肌。

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