Spiders capture prey by applying sticky coating substances to the spiral line of their orb webs. The main constituents of these sticky substances are glycoproteins and salts. This sticky substance is an intelligent material. Salt plays a key role regarding the properties of the sticky substance. Spiders typically weave a new orb webs by recycling used orb webs, and salts, typically salts of the alkali metals sodium and potassium, were therefore assumed to be recycled in this process. Here, we fed cesium (Cs) carbonate (which is an alkali metal salt) to spiders (Araneus ventricosus) to test this hypothesis. After feeding, we mapped the sticky substance in the spiders' orb web using an in‐house time‐of‐flight secondary ion mass spectrometer with high lateral resolution. The results showed that Cs ion was ingested and integrated into the sticky substance, and it showed properties similar to those of sodium ion and potassium ion.

中文翻译：

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蜘蛛球网胶球中的铯积累

蜘蛛通过将粘性涂层物质涂在其球网的螺旋线上来捕获猎物。这些粘性物质的主要成分是糖蛋白和盐。这种粘性物质是一种智能材料。盐在粘性物质的性质方面起着关键作用。蜘蛛通常通过回收用过的球网来编织新的球网，因此盐，通常是碱金属钠和钾的盐被假定在此过程中被回收。在这里，我们将碳酸铯（Cs）（一种碱金属盐）喂给蜘蛛（Araneus ventricosus）以检验该假设。进食后，我们使用具有高横向分辨率的室内飞行时间二次离子质谱仪在蜘蛛的球网上绘制了粘性物质。结果表明，Cs离子被摄入并整合到粘性物质中，其性质类似于钠离子和钾离子。