Ponto-Caspian gammarids: Change water temperature
Overall effectiveness category Likely to be beneficial
Number of studies: 1
Background information and definitions
The use of warm water in which to dip nets, waders and wetsuits could provide a useful biosecurity tool, and help to reduce the risk of moving gammarids between waterbodies.
Supporting evidence from individual studies
A controlled laboratory study in 2011, England, UK (Stebbing et al. 2011) found that heating water killed the invasive killer shrimp Dikerogammarus villosus. All shrimp died within a 15 minute exposure period when immersed into water at temperatures >36°C. All shrimps died immediately when immersed into water at temperatures >43°C. For each temperature tested, a container holding five shrimp was filled with water with measured temperatures of 28.4, 31.1, 36.3, 38.9, 43.2°C. A control set of five shrimps was held at ambient temperature (14-15°C). Shrimps were observed over a 15 minute period and then moved to freshwater at ambient conditions (14-15°C) to check for mortality over an 80 minute period.Study and other actions tested