The Razorback sucker was once common throughout the Gila River watershed regions of Arizona. Commercial fishing together with dam building decimated the fish stock, which were unable to breed due to lower water temperatures in the reservoirs while dams blocked their movement into smaller channels (Nabhan 1988:553).
The Razorback sucker was once widespread in the Gila River watershed regions of Arizona. Commercial fishing combined with dam construction drastically reduced the fish population, which could not reproduce due to cooler water temperatures in reservoirs while dams prevented their migration into smaller streams (Nabhan 1988:553).