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Document Type

Research

Abstract

In the fall of 1935, the Iowa Cooperative Wildlife Research Unit inaugurated field investigations on the ring-necked pheasant, Phasianus colchicus, on the Winnebago Research Area, sections 9-12, 13-16, and 21-24, Eden Township, Winnebago County. Early investigations (Green, 1938) were centered around winter mortality of pheasants and the improvement of habitat to alleviate winter losses. In 1939-41 intensive investigations were shifted to the nesting and production of the ring-necked pheasant on a 1520-acre plot lying within sections 13, 14, 15, 23 and 24 (Baskett, 1947). Although the pheasants were increasing in numbers during 1939 and 1940, in 1941 and accelerated rate of summer production was noted. Instead of the usual 150-175 percent rate of summer increase over the spring population, production jumped to 220 percent in spite of the largest observed spring density - 125 birds per section. A parallel rise in the 1941 rate of production was also recorded in North Dakota (Bach, 1944).

Publication Date

1951

Journal Title

Proceedings of the Iowa Academy of Science

Volume

58

Issue

1

First Page

491

Last Page

495

Copyright

© Copyright 1951 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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