Date of Award

Spring 5-1-1991

Document Type

Thesis

Degree Name

Master of Arts (MA)

Department

Life Sciences

First Advisor

John O. Whitaker Jr.

Second Advisor

Marion T. Jackson

Third Advisor

Scott A. Johnson

Abstract

A reduction in the distribution of the Franklin's ground squirrel in the eastern portion of its range has led to its classification as a threatened species in Indiana. Information is lacking on this species' habitat requirements and population characteristics in Indiana, which limits management capabilities. The purpose of this study was to identify preferred habitat and population characteristics of the Franklin's ground squirrel in Indiana. Radio telemetry was conducted from April 1987 to September 1988 at 3 sites along a railroad right-of-way (ROW} in Benton County, Indiana. Land use and habitat types were mapped; species composition, density, percent cover, percent litter, and vegetation height were measured in each habitat type. Squirrels preferred railroad ROW over other land use types. Habitat use within the ROW varied among study sites. Habitat preference did not appear to be related to the vegetation characteristics measured. Adult densities ranged from 5.0-10.0 squirreljha (x = 7.4; n = 5), and the sex ratio was approximately 1:1. Males emerged from hibernation in late April approximately 1 week before females. Parturition occurred in late May and early June. Litter size ranged from 6.5 to 10.3 young/litter. Adult males immerged from mid-July to mid-August, followed by adult females and juveniles in September.

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