Rudd from DOC eradication at Lake Janet, Mt Grey. Photo: Pamela Kane.

Rudd from DOC eradication

Freshwater ecosystems are vulnerable to invasion by pests and weeds because it is very hard to detect them until they are a problem. In recent years there has been a rapid expansion of some species of introduced freshwater fish.

Once pest fish have invaded a waterway and become established it is very difficult to remove them because they are able to spread through a whole river catchment. It is very important to prevent pest fish from invading into places where they aren’t already.