Supplemental information for: Assessing the lethal effects of granular Bayluscide® on the early life stages of the freshwater mussel Lampsilis siliquoidea

Native freshwater mussels are present in many similar habitats that larval sea lamprey prefer, making them susceptible to non-target effects. The active ingredient of gB, niclosamide, was derived specifically as a molluscicide, therefore it is crucial to understand its impacts on a group of mollusks that have been imperiled due to many factors including the input of contaminants in the aquatic environment.

Two early life stages of Lampsilis siliquoidea were tested in 7-day exposures to gB. Mortality was significant in both sub-adult and newly metamorphosed mussels, with the latter being significantly sensitive to gB applications that were less than 1% of the suggested application rate. A significant decrease in mussel growth was seen at 0.78% of the suggested application rate.