Featured Research

from universities, journals, and other organizations

Texas Tortoise And Cattle Can Co-Exist

Date:
July 23, 2001
Source:
Society For Conservation Biology
Summary:
The conventional wisdom is that tortoises and cattle don't mix. But new research shows that the Texas tortoise and cattle can share rangelands as long as the grazing is managed.

The conventional wisdom is that tortoises and cattle don't mix. But new research shows that the Texas tortoise and cattle can share rangelands as long as the grazing is managed.

Related Articles


"Generalities about the effect of cattle grazing on North American tortoises should be avoided," say of Richard Kazmaier Oklahoma State University in Stillwater, Oklahoma, and his co-authors. This research is in the August issue of Conservation Biology.

Most tortoises live in dry areas that are ideal for rangeland, and livestock grazing has been implicated in the decline of tortoises in Argentina, southern Morocco and the Turkmen Republic. Grazing is also thought to threaten the desert tortoise, one of four tortoise species in North America. However, there is little direct evidence to support this belief.

Kazmaier and his colleagues studied the effects of moderate grazing on the Texas tortoise, which lives primarily on privately-owned rangelands in southern Texas and northeastern Mexico. The researchers compared tortoise populations in grazed and ungrazed pastures in the 6150-ha Chaparral Wildlife Management Area in southern Texas. Each grazed pasture had up to 23 steers/acre for a three-eight week rotation between October and May, when the tortoises typically hibernate.

To compare the tortoise populations, Kazmaier and his colleagues evaluated a variety of factors, including abundance, size, growth rate and adult survival. They found no differences in any of these factors between tortoises in grazed and ungrazed pastures, and so concluded that this moderate grazing regime has little if any effect on them.

However, the researchers stressed that there are some caveats. For instance, although the study area had been grazed previously, the current grazing regime began only six years ago. Thus, this work would not reveal any long-term effects of moderate grazing on the Texas tortoise and its habitat. Second, they caution that their work should not be applied to the desert tortoise, in part because the Texas tortoise evolved in presence of large grazers such as bison but the desert tortoise did not.

For more information about the Society for Conservation Biology: http://conbio.net/scb/

Kazmaier's co-authors are: Eric Hellgren of Oklahoma State University in Stillwater, Oklahoma; and Donald Ruthven and David Synatzske of the Texas Parks and Wildlife Department's Chaparral Wildlife Management Area in Artesia Wells, Texas.


Story Source:

The above story is based on materials provided by Society For Conservation Biology. Note: Materials may be edited for content and length.


Cite This Page:

Society For Conservation Biology. "Texas Tortoise And Cattle Can Co-Exist." ScienceDaily. ScienceDaily, 23 July 2001. <www.sciencedaily.com/releases/2001/07/010723101242.htm>.
Society For Conservation Biology. (2001, July 23). Texas Tortoise And Cattle Can Co-Exist. ScienceDaily. Retrieved December 22, 2014 from www.sciencedaily.com/releases/2001/07/010723101242.htm
Society For Conservation Biology. "Texas Tortoise And Cattle Can Co-Exist." ScienceDaily. www.sciencedaily.com/releases/2001/07/010723101242.htm (accessed December 22, 2014).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, December 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Earthworms Provide Cancer-Fighting Bacteria

Earthworms Provide Cancer-Fighting Bacteria

Reuters - Innovations Video Online (Dec. 21, 2014) Polish scientists isolate bacteria from earthworm intestines which they say may be used in antibiotics and cancer treatments. Suzannah Butcher reports. Video provided by Reuters
Powered by NewsLook.com
Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Existing Chemical Compounds Could Revive Failing Antibiotics, Says Danish Scientist

Reuters - Innovations Video Online (Dec. 21, 2014) A team of scientists led by Danish chemist Jorn Christensen says they have isolated two chemical compounds within an existing antipsychotic medication that could be used to help a range of failing antibiotics work against killer bacterial infections, such as Tuberculosis. Jim Drury went to meet him. Video provided by Reuters
Powered by NewsLook.com
Researchers Test Colombian Village With High Alzheimer's Rates

Researchers Test Colombian Village With High Alzheimer's Rates

AFP (Dec. 19, 2014) In Yarumal, a village in N. Colombia, Alzheimer's has ravaged a disproportionately large number of families. A genetic "curse" that may pave the way for research on how to treat the disease that claims a new victim every four seconds. Duration: 02:42 Video provided by AFP
Powered by NewsLook.com
Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Monarch Butterflies Descend Upon Mexican Forest During Annual Migration

Reuters - Light News Video Online (Dec. 19, 2014) Millions of monarch butterflies begin to descend onto Mexico as part of their annual migration south. Rough Cut (no reporter narration) Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins