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I think using the term "landlocked" in the taxonomy section is misleading because anadromous, riverine (stream resident), and lacustrine (lake dwelling) populations may intermingle. Potamodromous populations which migrate entirely in freshwater may indeed not be landlocked. There is evidence that males, returning from the sea and spawning remain in freshwater as stream resident while females return to the saltwater if they survive the spawn. The original classification of sea trout, lake trout, and river trout continues to cause confusion today that is aggravated by the unpredictable migratory behavior of introduced populations which are for the most part from stocks with mixed ecological forms. Being landlocked has nothing to do with it. Brown trout are migratory by nature and will move to the most productive feeding and spawning grounds available to them. --Mike Cline (talk) 01:36, 5 October 2016 (UTC)[reply]
Although reliably sourced, mentioning it might be seen as problematic. Prior to damming of the Volga, Salmo trutta caspius, the Caspian brown trout, was anadromous into the Black sea. Today it is critically endangered and I cannot find any sourced evidence that there is still capability to migrate from the Caspian to the Black sea. Should we leave it or dump it? --Mike Cline (talk) 13:39, 6 October 2016 (UTC)[reply]
