With the ease of world-wide travel the impact of invasive species is now an international problem and many countries have introduced legislation covering the materials and construction techniques used in the production of clothing – notably wading boots. Legislation covering the entry of fishing tackle and clothing is now very restrictive in some countries.
Animals and plants that have been introduced to a place where they do not naturally occur are known as non-native species. Many of these live happily in the UK without causing a problem but a few become what’s called invasive. Invasive species upset the balance of the ecosystem as they may be bigger, faster growing or more aggressive than the native species. They may also have fewer natural predators to control numbers. The native species are o
ften unable to compete and fairly quickly the invasive species take over. For more information refer to NON NATIVE SPECIES SECRETARIAT website use this link to the NNSS website page or for the Species Page to go to the listing of Invasive Species Identification Sheets.
Invasive plants found along the Derwent : Himalayan Balsam, Giant Hogweed and Japanese Knotweed
Invasive species which may be found in and around the Derwent are mink and signal crayfish – which were introduced from North America in the 1970’s For more information use this link to the NNSS website information sheet on signal crayfish.
Members should report all sightings of mink or crayfish to a committee member.
The Angling Trusts page of information on Cormorant Predation
For information on Non Native Species use this link to visit the NON NATIVE SPECIES SECRETARIAT website INVASIVE AQUATIC SPECIES page with details of the Check -Clean-Dry campaign