Frederick Ernest Joseph Fry MBE FRSC (April 17, 1908 – May 22, 1989) was a Canadian ichthyologist and aquatic ecologist.
He is known for his early research in physiological ecology and population dynamics in fishes.
[1][2][3] In the late 1940s, he became the first scientist to model how environmental factors affect the activity of fish.
During World War II Fry served in the Royal Canadian Air Force from 1941 to 1945, working in aviation medicine, where he helped develop equipment aiding in respiration at high altitudes.
In an influential 1949 paper,[6] Fry developed "virtual population" analysis to understand effects of fishing on fish populations, a method which 50 years later was still in a chief way of determining total allowable catches in fisheries management.