Determination of thermal tolerance in rainbow trout Oncorhynchus mykiss based on effective time, and its reproducibility for a large number of fish

摘要

Thermally selected male rainbow trout selectively bred at high temperatures were crossed with females of the Nikko strain with normal thermal tolerance. The F2 pedigrees, comprising 1641 individuals, were divided into 26 batches. The fish were acclimated to 17?°C, then their thermal tolerance determined by measuring the effective time (ET) required for them to lose equilibrium at an approximate upper lethal temperature (28?°C). The fish were categorized into 0- to?