 The scientists involved believed that this was because of a lack of suitable spawning sites, they built a pond filled with gravel and vegetation and soon there were many juvenile fish seen.In 2005, a second attempt to reintroduce them to the upper part of the river was reportedly more successful, following engineering to create suitable spawning sites In 2014, the IUCN declared this species sufficiently 'wild' (i.e.no direct intervention) to remove it from its "Extinct in the Wild" category, and is now considered "Vulnerable".