Outcomes and success stories

Does management work?

Success is not always 100%, regardless of whether the objective is to fully eradicate an introduced fish population or to control it. Yet, success stories exist. Listen to Marc Ventura from the Centre for Advanced Studies in Spain and Dirk Schmeller from the University of Toulouse in France talk about it!

What happens when fishes have been removed?

When the removal of introduced fish species is successful, mountain lakes and their species can recover.

• the water becomes more transparent
  Find out more about lake transparence in lakes before and after fish removal from the LIMNOPIRINEUS project
• populations of amphibians and of other invertebrate species recover
  In the high mountain lakes of the Pyrenees, for example, amphibian populations have recovered, reaching the specific abundance levels of the natural control lakes
  Find out more about amphibian recovery from the LIMNOPIRINEUS project
• native fish populations improve
  In Yellowstone Lake, for example, fish suppression of lake trout resulted in an increase in the abundance of large native Yellowstone cutthroat trout
  Listen to Todd Koel from the US National Park Service to find out more about the Yellowstone lake ecosystem restoration