Globally, salmonids have been widely introduced into freshwater areas for aquaculture and recreational angling. brown trout (Salmo trutta), which are native to Europe, and brook trout (Salvelinus fontinalis), which are native to North America, were introduced to Japan, and currently there are concerns that they are having a negative impact on the distribution and habitat of native white-spotted charr (Salvelinus leucomaenis) in Japan.