ABSTRACT: Suspension-feeding bivalve molluscs perform important ecological roles by coupling pelagic and benthic systems during their feeding activities. Particle capture, and thus feeding, is dependent on particle encounter and retention on the gill filaments, with several factors influencing this process. Over the past 30 yr, different types of synthetic microspheres have been used to examine aspects of particle capture and ingestion by bivalves. Critics of this work have posited that manufactured particles may contain surfactants, chemicals commonly used in manufacturing to reduce surface tension, that could produce spurious capture and ingestion rates. The goal of this work was to experimentally assess whether the presence of different types of surfactants on manufactured polystyrene particles can result in instantaneous effects on particle capture by the blue mussel Mytilus edulis. The effects of 3 different types of common surfactants (sodium dodecyl sulfate, benzalkonium chloride, Triton-X) on clearance rates (CR) and capture efficiencies (CE) were tested. Results indicated that none of the surfactant treatments had an effect on CR. Treatment with one of the surfactants (Triton-X) significantly lowered CE for 3 µm sized spheres compared to the control spheres (Milli-Q treated). None of the other tested surfactants significantly affected CE when compared to the control treatment. These data add to an understanding of particle handling by bivalves, and suggest that concentrations of surfactants found on commercially available microspheres used for experiments or found in the environment have little immediate effect on feeding processes.

中文翻译：

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检查表面活性剂对蓝贻贝Mytilus edulis的清除率和捕获效率的影响

摘要：悬浮饲料双壳类软体动物通过在其进食活动中将浮游和底栖系统耦合而发挥重要的生态作用。颗粒的捕获以及因此的进料取决于颗粒的接触和g丝上的保留，并有几个因素影响该过程。在过去的30年中，已经使用了不同类型的合成微球来检查双壳类动物对颗粒的捕获和吸收。这项工作的批评者认为，人造颗粒可能含有表面活性剂，即通常用于制造中以降低表面张力的化学物质，它们可能会产生虚假的捕获和摄入速率。食用菌。测试了3种不同类型的常用表面活性剂（十二烷基硫酸钠，苯扎氯铵，Triton-X）对清除率（CR）和捕获效率（CE）的影响。结果表明，表面活性剂处理均未对CR产生影响。与对照球体（Milli-Q处理）相比，用一种表面活性剂（Triton-X）处理可显着降低3 µm尺寸球体的CE。与对照处理相比，其他测试表面活性剂均未对CE产生显着影响。这些数据加深了对双壳类动物对颗粒处理的理解，并表明在用于实验的市售微球上发现或在环境中发现的表面活性剂浓度对进料过程几乎没有直接影响。