Resident trout and movement : consequences of a new paradigm /

Abstract

Trout living in streams have been thought to move very little throughout their entire lives. Recent research has demonstrated that adult brown trout, Colorado River cutthroat trout, brook trout, and rainbow trout were far more mobile than previously believed. The mobility of trout has probably affected estimates of fish abundance, preceptions of habitat quality, and the delineation of populations, and could nullify the desired outcome of restrictive angling regulations. Also, by fragmenting streams we may be reducing the probability of persistence of native trout populations by restricting movement and thus restricting population size.