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Home > Iowa Academy of Science > Journals & Newsletters > Journal of the Iowa Academy of Science > Volume 98 (1991) > Number 2

 

Document Type

Research

Keywords

Iowa, Phasianus colchicus, Colinus virginianus, Perdix perdix, Syvilagus floridanus, Lepus townsendii, population trends, roadside survey

Abstract

Results of the August roadside survey collected from 1963 through 1988 were examined to determine if trends could be detected in the counts of ring-necked pheasants (Phasianus colchicus), northern bobwhite (Colinus virginianus), gray partridge (Perdix perdix), cottontail rabbits (Sylvilagus floridanus), and white-tailed jackrabbits (Lepus townsendii). The counts also were compared to harvest estimates co determine if correlations exist. Statistically significant linear trends were detected statewide for pheasants, gray partridge and jackrabbits during the 1963 co 1988 period. Trends were downward for all species except gray partridge. During the late 12 years (1977 through 1988), the only significant trend detected was for gray partridge, where counts increased. The survey results also were examined for trends on a regional basis where possible. Significant correlations were found between the mean counts and harvest for all species. For cottontails, however, chis relationship appears to have changed as the correlation of the counts with harvest since 1977 is near zero.

Publication Date

June 1991

Journal Title

Journal of the Iowa Academy of Science

Volume

98

Issue

2

First Page

82

Last Page

90

Copyright

© Copyright 1991 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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