1.8 Threat: Invasive and other problematic species

1.8.1 Reduce predation by other species Beneficial ● Remove or control fish by drying out ponds One before-and-after study in the USA found that draining ponds to eliminate fish increased numbers of amphibian species. Four studies, including one review, in Estonia, the UK and USA found that pond drying to eliminate fish, along with other management activities, increased amphibian abundance, numbers of species and breeding success. Assessment: beneficial (effectiveness 80%; certainty 66%; har..