Population trend
Trend
Although the range of this species is reasonably well known, information about population trends is lacking. There has most likely been a loss of mainstream habitats in the last ten years, and the distribution range in the Noordhoeks tributary has fluctuated depending on where water extraction occurs. However, more accurate information is needed to study long-term trends. The last population estimate was done by Bills in 1999 and he estimated a total of 5020 individuals (Bills and Impson 2013).