Degree Discipline

Degree Level

3 Matching Results

Results open in a new window/tab.

Biogeographic Relationships of Pocket Gophers (Geomys breviceps and Geomys bursarius) in the Southeastern Portion of Their Ranges (open access)

Biogeographic Relationships of Pocket Gophers (Geomys breviceps and Geomys bursarius) in the Southeastern Portion of Their Ranges

This research utilized population genetic analyses (protein starch-gel electrophoresis and DNA sequencing of the cytochrome b mtDNA gene), host-parasite specificity (lice coevolution), remote sensing of satellite data, and geographic information systems (GIS) to characterize newly discovered populations of pocket gophers (genus: Geomys) in Arkansas. These populations are isolated and occur in seemingly unsuitable habitat in the Ozark Mountains of Arkansas. Analyses of electrophoretic and ectoparasite data suggested the populations in the Ozark Mountains represented isolates allied to Geomys bursarius, a species not known to occur in Arkansas. Comparison of mitochondrial DNA sequence data of the cytochrome b gene with that of other taxa and morphometric analyses confirmed that these populations are most closely allied to G. bursarius occurring to the north in Missouri. Moreover, these mtDNA sequence analyses indicated a degree of differentiation typical of that between other subspecies of pocket gophers. Therefore, these populations represent a distinct genetic entity in an intermediate stage of speciation and should be designated as a new subspecies, Geomys bursarius ozarkensis. Molecular clock analysis revealed a time of lineage divergence for this new subspecies as approximately 511,000 YBP. Due to the isolated nature and limited distribution of this subspecies, an evaluation of critical habitat …
Date: August 1998
Creator: Elrod, Douglas Allen
Object Type: Thesis or Dissertation
System: The UNT Digital Library
[The Randle Family Collection, No. 5 - Arkansas Vacation] captions transcript

[The Randle Family Collection, No. 5 - Arkansas Vacation]

This home video documents Kathy and George Randle visiting Kathy's parents, Gerald and Ruby, in Arkansas, including footage of a Lion's Club meeting.
Date: 1998-10/1998-11
Creator: Randle, George
Object Type: Video
System: The Portal to Texas History
The Southwestern Historical Quarterly, Volume 101, July 1997 - April, 1998 (open access)

The Southwestern Historical Quarterly, Volume 101, July 1997 - April, 1998

The Texas State Historical Association Quarterly Report includes "Papers read at the meetings of the Association, and such other contributions as may be accepted by the Committee" (volume 1, number 1). These include historical sketches, biographical material, personal accounts, and other research. Index is located at the end of the volume starting on page 557.
Date: 1998
Creator: Texas State Historical Association
Object Type: Journal/Magazine/Newsletter
System: The Portal to Texas History