Scientists are breeding the endangered brook trout species at Mountain Pond New York under a Department of Environmental Conservation program.

This species has become endangered owing to agriculture, damming, logging and industrial pollution (acid rain). Rivers in the Saranac Lake Wild Forest area have seen this species fall from 94% brook trout to only 3%.

Controversially, the chemical rotenone was used to kill all fish in Mountain Pond before restocking work. Rotenone has the capacity to kill all gill-breathing creatures.