Navigation Links
Deadly Black Widow Spider Edged Aside in California
Date:7/5/2012

THURSDAY, July 5 (HealthDay News) -- What's bad news for the black widow spider may be good news for California homeowners: The less-toxic brown variety appears to be taking over.

Although they are relatively new to North America, a new study found that brown widow spiders may be displacing the black widow spiders that are native to southern California.

Researchers found the brown widow spider likes to hide outside people's homes. They noted, however, that it's less toxic than the black widow.

In conducting the study, the researchers performed time searches in various habitats, such as developed parks, urban properties and undeveloped natural areas to compare the abundance and habitat selection of the brown widow spider to that of the black widow spider.

Using data collected from 72 sites, the researchers found 20 times as many brown widows as black widows outside homes, especially under outdoor furniture and in tiny cracks in walls, fences and other objects. The researchers noted that none of the spiders was found inside people's homes.

"Homeowners would benefit to know about the hiding places of brown widows, displaying care when placing their hands in nooks and crannies," the study's authors wrote.

Brown widow spiders were first seen in Florida back in 1935, but they were not documented in southern California until 2003, the researchers pointed out.

"The brown widows really burst on to the scene in a very short time, and we found brown widows in many habitats where we expected to find black widows," study corresponding author Richard Vetter, of the University of California, Riverside, said in a Entomological Society of America news release. "There may be some competition where brown widows are displacing black widows because there is some habitat overlap. There are also places where only brown widows were able to make homes, but in other habitats the black widows still predominate."

The research was published in the July issue of the Journal of Medical Entomology.

More information

The University of California, Riverside provides more information on brown widow spiders.

-- Mary Elizabeth Dallas

SOURCE: Entomological Society of America, news release, July 2, 2012


'/>"/>
Copyright©2012 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. UW research shows new prognosis tool for deadly brain cancer
2. Tylenol Overdose Can Be Deadly for a Child
3. Markey receives $6.25 million to study deadly blood and bone marrow disease
4. MSU plan would control deadly tsetse fly
5. Mens Breast Cancer Often More Deadly, Study Suggests
6. Pacemakers, Defibrillators Sources of Deadly Infections: Study
7. Scientists uncover multiple faces of deadly breast cancer
8. Despite hardships, black men in urban communities are resilient, MU researcher says
9. 9 in 10 Blacks With High Blood Pressure Have Early Heart Disease
10. Exercise Controls Weight in White Girls Better Than in Black Girls: Study
11. Blacks, Hispanics Have Higher Colon Polyp Risk Than Previously Thought
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Deadly Black Widow Spider Edged Aside in California 
(Date:2/9/2016)... ... ... The Journal of Pain Research has published the commentary “ Terminology of ... Dr John F. Peppin says “Terminology matters, yet little attention has been paid to ... cancer pain’ and ‘chronic non-cancer pain’ are replete in the literature; however, the distinction ...
(Date:2/9/2016)... , ... February 09, 2016 , ... ... The guide will ensure lab personnel have a basic understanding of the techniques ... measurement protocols. Enhanced understanding will help them reduce waste and rework to create ...
(Date:2/9/2016)... , ... February 09, 2016 , ... ... cleaning and sealing company , is proud to announce that many of their ... levels of customer service. The hard surface restoration franchises received customer recognition through ...
(Date:2/8/2016)... PLAINSBORO, N.J. (PRWEB) , ... February 08, 2016 , ... ... on cancer patients, has officially launched the Multiple Myeloma Heroes Awards event , ... (MM) or in the lives of patients with MM. The MM Heroes Awards ...
(Date:2/8/2016)... ... February 08, 2016 , ... Stephanie ... celebrates the beginning of a new charity campaign. As part of their ongoing ... Advocates (CASA). In the belief that children deserve a voice, and in the ...
Breaking Medicine News(10 mins):
(Date:2/9/2016)... LONDON , Feb. 9, 2016 Hearing ... amount of sound energy transmitted to the inner ear. ... and hearing bands. These devices are recommended for users ... eight hours. Earplugs refer to HPD that are inserted ... attenuation earplugs are designed to provide more natural sound ...
(Date:2/9/2016)... -- Increasingly, health care professionals are enhancing patient care and ... With the Vios Monitoring System from Vios Medical, health ... problems before they become serious by continuously tracking and ... the United States . --> ... --> The Vios Monitoring System connects patient-worn sensors, ...
(Date:2/9/2016)... -- The new report "Global Anti-Bacterial Drugs Market Assessment & Forecast: ... reveals that the North America continued to ... 2014 that translated into revenues worth US$ 16,907.3 million. ... Asia-Pacific , Latin America , ... The global anti-bacterial market is inclined towards North America ...
Breaking Medicine Technology: