Combs, B.D. and Burrows, R.E. (1957) Threshold temperatures for the normal development of Chinook salmon eggs. The Progressive Fish-culturist, pp. 3-6
| Species | Development state | Trait | Primary Data | Secondary Data |
| Oncorhynchus tshawytscha | Egg | Temperature for incubation | [High constant incubating temperatures established tha range between 57.5 and 60°F as the upper temperature threshold. Incubation at 35°F, resulted in complete mortality, thereby establishing this temperature as a lower limit for future trials. Other experiments, established the range 10 and 42.5°C as the lower threshold] | 57.5 °C |