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Use of carbon dioxide in zebra mussel (Dreissena polymorpha) control and safety to a native freshwater mussel (Fatmucket, Lampsilis siliquoidea)

Diane L. Waller·Michelle R. Bartsch
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Abstract

Control technology for dreissenid mussels ( Dreissena polymorpha and D. bugensis ) currently relies heavily on chemical molluscicides that can be both costly and ecologically harmful. There is a need for more environmentally neutral tools to manage dreissenid mussels, particularly in cooler water. Carbon dioxide (CO 2 ) has been shown to be lethal to several species of invasive bivalves, including zebra mussels and Asian clams ( Corbicula fluminea ). We evaluated the effectiveness of unpressurized infusion of CO 2 for 24 to 96 h (100 000–300 000 µatm PCO 2 ) at a water temperature of 12 °C on mortality, byssal thread formation, and attachment of zebra mussels. The safety of elevated CO 2 to a nontarget native freshwater mussel (Fatmucket, Lampsilis siliquoidea ) was also determined. Elevated PCO 2 exposure induced narcotization and reduced attachment of zebra mussels within 24 h. Mortality increased with exposure duration and PCO 2 . An estimated LT50 (lethal time to produce 50% mortality) for fixed PCO 2 ranged from 24 h at 275 000 µatm to ~ 96 h at 100 000 µatm. Exposure of zebra mussels to CO 2 for 96 h caused 80–100% mortality at all treatment levels. Fatmucket juveniles survived all PCO 2 treatments but burial and byssal thread production were adversely affected during exposure. Our results demonstrate that CO 2 is a viable option for management of zebra mussels in cool water and may have less adverse effect for native lampsiline mussels than current-use molluscicides.

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Diane L. Waller, Michelle R. Bartsch. 2018. Use of carbon dioxide in zebra mussel (Dreissena polymorpha) control and safety to a native freshwater mussel (Fatmucket, Lampsilis siliquoidea). https://doi.org/10.3391/mbi.2018.9.4.07

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