1. National Institute for Aquatic Research, Technical University of Denmark, Silkeborg, Denmark
2. ZSL Institute of Zoology, Zoological Society of London, Regent's Park NW1 4RY, UK
3. The Tweed Foundation, The Tweed Fish Conservancy Centre, Drygrange Steading, Roxburghshire, Melrose TD6 9DJ, UK
4. Environment Agency, Newcastle Business Park, Newcastle Upon Tyne NE4 7AR, UK
5. Environment Agency, Rivers House, Threshelfords Business Park, Feering, Kelvedon, Colchester CO5 9SE, UK
6. Environment Agency, Riversmeet House, Tewkesbury, UK
7. Thünen Institute of Fisheries Ecology, Bremerhaven, Germany
8. Department of Biosciences, University of Exeter, Exeter EX4 4PS, UK
9. The Rivers Trust, Cornwall PL17 8PH, UK