| Introduced in early 20th century (Ref. 1971), but local sources suggest late 1800s. Recent research suggests well established populations in still waters but not rivers (Gordon Copp, pers. comm., Oct. 18, 2006). Has become established and has bred in several waters during the first world war at Groombridge in East Sussex (England) and at Newport-on-Tay, Fife (Scotland); since 1938 near Crawley, West Sussex, and in 1953 near Bridgewater, Somerset (both England). The first two populations have since died out. Also from a lake on Broadlands estate in Hampshire and since 1973 in several waters in and around London. This species was listed in the paper on the introduction of Catostomus commersoni as introduced species in UK from North America (Ref. 13736). Also Ref. 1971, 13686, 56550, 56555, 57525 and 56552.
Ref:
Lever, C., 1996
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