Relation between the Ultimate Upper Lethal Temperature and the Temperature-range for Good Health in the Roach (Rutilus rutilus)

Abstract

THE ultimate upper lethal temperature for roach, as defined by Fry1, is 33.5° C. These fish remain in good condition and all survive at 26° C. (for at least three months). At 30° C. roach lose condition and individuals die after a few weeks, while at 32° C. their condition deteriorates rapidly and individuals die within a week. 
DOI: 10.1038/180661a0

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