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首页> 外文期刊>Estuarine Coastal and Shelf Science >Assessing parasite community structure in cockles Cerastoderma edule at various spatio-temporal scales
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Assessing parasite community structure in cockles Cerastoderma edule at various spatio-temporal scales

机译：在各种时空尺度下评估蛤C皮疹中的寄生虫群落结构

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摘要

Cockles (Cerastoderma edule) are among the most exploited bivalves in Europe. They live in lagoons and estuaries where they undergo many stressors including parasites. Trematodes are the most prevalent macroparasites of cockles and can exert a significant impact on their host populations depending on parasite species and infection intensity. Monitoring these parasite-host systems in order to predict potential host mortalities require a correct knowledge of the spatio-temporal variation of infection. A yearly monitoring of cockles from six stations around He aux Oiseaux, Arcachon Bay (France) was conducted between 1998 and 2005. Distance between two stations was ca. 1 km. Nine trematode species were identified. Despite a relative homogeneity of the parasite community structure in cockles, between three and six clusters were identified by Hierarchical Ascendant Classification showing that among-sites heterogeneity of trematode communities in cockles was higher than within-site heterogeneity. At the scale of 8 years, and for 2-year old cockles, these patterns remained stable in four out of six stations. Spatial aggregation disappeared with cockle age, since parasite communities in 3-year cockles did not reflect any particular station(s): with age, cockles eventually accumulated most trematode species and lost the site signature. On the other hand, we demonstrated that the commonly accepted theory stating that older/larger cockles accumulate more trematode larvae was not verified and that there could exist a vulnerable age/size that doesn't correspond to largest values. This study provided a new insight in the parasite community heterogeneity in their host, and in the significance of samples in relation with space and time.
机译：鸟蛤（Cerastoderma edule）是欧洲最被利用的双壳类动物之一。他们生活在泻湖和河口，在那里他们受到许多压力，包括寄生虫。吸虫是最常见的鸟蛤大寄生虫，根据其寄生虫种类和感染强度，它们可以对它们的寄主种群产生重大影响。监测这些寄生虫宿主系统以预测潜在的宿主死亡率，需要对感染的时空变化有正确的认识。在1998年至2005年之间，对阿尔卡雄湾（法国）的He aux Oiseaux周围六个站点的鸟蛤进行了年度监测。两个站点之间的距离大约为0。 1公里鉴定了九种吸虫。尽管鸟蛤中寄生虫群落结构相对均一，但通过层次上升分类法却发现了三到六个集群，这表明鸟蛤中吸虫线虫群落的站点间异质性高于站点内异质性。在8年的规模和2岁的鸟蛤中，这些模式在六个站点中的四个站点中保持稳定。空间聚集随着鸟蛤年龄的增长而消失，因为3年鸟蛤中的寄生虫群落没有反映任何特定的位置：随着年龄的增长，鸟蛤最终会积聚大多数吸虫物种并失去部位特征。另一方面，我们证明了公认的理论，即年龄较大/较大的鸟蛤积聚了更多的线虫幼虫，并且可能存在不符合最大值的脆弱年龄/大小。这项研究为寄主中的寄生虫群落异质性以及与时间和空间有关的样本意义提供了新的见解。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2012年第10期|p.54-60|共7页
  • 作者

    Xavier de Montaudouin; Cindy Binias; Geraldine Lassalle;

  • 作者单位

    Univ. Bordeaux, EPOC, UMR 5805, 2, rue du Pr Jolyet, F-33120 Arcachon, France,CNRS, EPOC, UMR 5805, F-33120 Arcachon, France,Univ. Bordeaux, EPOC, UMR 5805, 2, rue du Pr Jolyet, F-33120 Arcachon, France;

    Univ. Bordeaux, EPOC, UMR 5805, 2, rue du Pr Jolyet, F-33120 Arcachon, France,CNRS, EPOC, UMR 5805, F-33120 Arcachon, France;

    Univ. Bordeaux, EPOC, UMR 5805, 2, rue du Pr Jolyet, F-33120 Arcachon, France,CNRS, EPOC, UMR 5805, F-33120 Arcachon, France,Littoral Environnement et Societes, UMR 6250 CNRS-Uni-versite de la Rochelle, 2 rue Olympe de Gouges, 17042 La Rochelle, Cedex, France;

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  • 正文语种 eng
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  • 关键词

    cockle; parasites; scaling; spatial heterogeneity; temporal trend; shellfish;

    机译：鸟蛤寄生虫缩放空间异质性时间趋势;贝类;

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