Eradication of invasive alien species in fish corridors and the role of recreational anglers


Thursday, 6 December 2018

Migratory fish corridors compensate the fragmentation of natural waterways due to the presence of human obstacles such as dams, dykes and locks. These barriers prevent the natural movements of the Adriatic sturgeon (Acipenser naccarii) and other native species migrations in Po River, Italy.

However, these fishways also present the risk of facilitating the spread of invasive alien species. To counter this effect, fish passes can be monitored for the isolation of unwanted invasive species. Within the LIFE+ ConFluPo Project invasive species such as the wels catfish (Silurus glanis) can be trapped in their way through the fish bypass.  

Traditional recreational fishing has been usually perceived as an activity that can contribute to the introduction of alien species, but recreational fishers can also have a pivotal role in monitoring and stop the spread of IAS. Anglers are an important source of data on alien aquatic species, as they frequently share their experiences through online platforms (blogs, forums, social networks, fishery websites and citizen science platforms).

For more information:

Video (minute 17.44):