 Paiute cutthroats are also notable for a purple coloration, whereas Lahontan cutthroats have bronze coloration.The Paiute strain must have adapted to a diet mainly of insects and become less migratory since juvenile fish swimming downstream in search of larger waters would have passed below downstream barriers and left the isolated gene pool.Basque sheepherders began grazing sheep along upper Silver King Creek in the 1800s.