1. Department of Biological Sciences, Faculty of Applied Sciences; Rajarata University of Sri Lanka; Mihintale Sri Lanka
2. Department of Zoology and Environmental Management; University of Kelaniya; Kelaniya Sri Lanka
3. Department of Aquatic Ecology; Netherlands Institute of Ecology (NIOO-KNAW); Wageningen The Netherlands
4. Institute for Limnology of the Austrian Academy of Sciences; Mondsee Austria
5. River Ecology and Conservation, Institute of Ecology; University of Innsbruck; Innsbruck Austria