The faucet snail, Bithynia tentaculata, is an invasive snail that facilitates outbreaks of waterfowl disease in the Upper Mississippi River of the United States. In response, there is interest in identifying strategies that mitigate its population and spread. In this study we assessed the effects of a copper (Cu) molluscicide, EarthTec® QZ, at three concentrations (0, 0.1 and 0.6 mg/L Cu) on adult B. tentaculata and a coexisting native species, Physa gyrina. We found that in the 0.6 mg/L Cu treatment, ~ 68% of B. tentaculata snails remained alive after a 4-day exposure whereas all P. gyrina snails died. In contrast, a majority of both snail species remained alive and active after 4 days in the control and 0.1 mg/L Cu treatments. Although B. tentaculata demonstrated higher survivorship, it bioaccumulated more Cu than P. gyrina. Additionally, examination of B. tentaculata individuals revealed that females tended to exhibit higher mortality than males.

水龙头蜗牛Bithynia tentaculata是一种侵入性蜗牛，它促进了美国密西西比河上游水禽疾病的爆发。作为回应，人们有兴趣确定减轻其人口和传播的策略。在这项研究中，我们评估了三种浓度（0、0.1 和 0.6 毫克/升铜）的铜 (Cu) 杀软体动物剂 EarthTec® QZ 对成虫B. tentaculata和共存的本地物种Physa gyrina 的影响。我们发现，在 0.6 mg/L Cu 处理中，约 68% 的B. tentaculata蜗牛在暴露 4 天后仍然存活，而所有P. gyrina蜗牛死了。相比之下，在对照和 0.1 mg/L Cu 处理 4 天后，两种蜗牛物种中的大多数仍然存活和活跃。尽管B. tentaculata表现出更高的存活率，但它比P. gyrina生物积累了更多的铜。此外，对B. tentaculata个体的检查表明，雌性的死亡率往往高于雄性。