Combs and Burrows 1957: Incubation Temp and Chinook Eggs

Data and plot summarized from Bratovich et al., 2020:

"Myrick and Cech (2001) combined mortality data of Chinook salmon eggs from fertilization to
hatching from laboratory experiments for multiple water temperature treatments, ranging from
35°F to 68.4°F (~2 to 20°C) (Figure 4). The function applied to the mortality data appears to be a
quadratic function, where mortality decreases at an increasing rate as water temperature warms
from about 35°F to 50°F, and higher mortality at an increasing rate as water temperature warms
from about 50°F to 65°F. Because these data represent total mortality of incubating eggs over the
course of the respective incubation periods for each treatment and study, this relationship was not
used to estimate daily mortality rates in this TM. However, it does illustrate the notable increases
in mortality that occur with increases in water temperature above about 15°C (59°F)."

Function roughly equal to Survival = -1.0925x2 + 20.202x + 2.9062; R² = 0.9936 (where x is temp in degrees C)