The effects of salinity on the survival and reproduction of the freshwater snail, Physa gyrina.

Abstract

The effects of five different salinity levels were assessed on the freshwater snail Physa gyrina, survival rate based on mortality and reproduction based on production of jelly masses. Biofilm accumulation in recirculating aquaculture tanks can negatively affect fish health. The introduction of Physa gyrina to these aquaculture systems can significantly reduce biofilm. Snails were placed in treatments of typical salinity levels, 0ppt – 4ppt, in aquaculture systems normally dosed with salt.