Preferred Temperature of Yearling Colorado Squawfish

Abstract
Temperature preference of yearling Colorado squawfish, P. lucius, was determined in a horizontal gradient trough. Fish were acclimated to 14, 20, and 26.degree. C, and 20 fish were tested from each acclimation temperature. Acute preferenda were 21.9, 27.6, and 23.7.degree. C for 14, 20, and 26.degree. C-acclimated fish, respectively. Final preferendum was estimated as 25.degree. C.