There are good reasons for concern that both these dams will substantially diminish fish stocks in the Mekong, though as lan Baird, a long-time researcher on Mekong issues, points our in relation to the dam in Cambodia, NGOs have probably placed too much importance on the relocation of affected communities above the likely loss of fish stocks. At the same time, WWF has repeatedly drawn attention to the possibility that the Don Sahong dam could lead to the extinction of the critically endangered Mekong dolphins in the Mekong. While this is a legitimate cocern, the much more extensive loss of fish stocks risks being undervalued by the stress om this one issue.