The worrying declines we are seeing in freshwater fish should be a wake-up call to those capable of changing policy (Freshwater fish populations in ‘freefall’, 23 February). As part of the Missing Salmon Alliance we are working hard to build an evidence base to show national decisionmakers what can be done for species like Atlantic salmon before it’s too late. Saving these beloved fish is possible, but only with research providing the evidence-based solutions.