Carol Ann Woody Thomas P. Quinn John T. Konecki 1995 <p><span>Juvenile coho salmon (</span><i>Oncorhynchus kisutch</i><span>) from three populations in Washington State were captured in the field and tested for critical thermal maximum (CTM). Tolerances varied among the populations (mean CTMs were 28.21, 29.13, and 29.23 °C) and exceeded published data from some laboratory tests. The population from a relatively cool stream had a lower CTM than the two populations from warmer streams. However, after the salmon had been in the laboratory for 3 months under constant, common temperature regimes, the CTMs no longer differed, indicating that the population-specific differences resulted from different acclimation regimes rather than from genetic adaptation.</span></p> application/pdf 10.1139/z95-117 en NRC Research Press Critical thermal maxima of coho salmon (<i>Oncorhynchus kisutch</i>) fry under field and laboratory acclimation regimes article