A summer sight record project was conducted in Iowa from 1948 through 1963 to check annual production of pheasants. The ratio of juveniles to adult hens, or young per hen, indicated the rate of reproductive success. Young per hen figures indicated trends in the fall pheasant populations each year except 1950. There was a close relationship between reproductive success and mean temperatures for April. This correlation was significant at the 0.05 probability level when results for 1954 were eliminated. Temperatures averaged 12 degrees below normal during the first week of May in 1954, which reduced pheasant production. Results of the survey illustrate the importance of annual production and indicate that production is closely associated with spring weather conditions.
Proceedings of the Iowa Academy of Science
©1964 Iowa Academy of Science, Inc.
Nomsen, Richard C.
"Some Aspects of Pheasant Reproductive Success in Iowa, 1948-1963,"
Proceedings of the Iowa Academy of Science, 71(1), 228-234.
Available at: https://scholarworks.uni.edu/pias/vol71/iss1/37