Salamanders suffer delayed effects of common herbicide

razine exposure paled in comparison to the persistent effects of atrazine that continued to cause mortality after exposure ceased, said researchers. Compared to salamanders not exposed to atrazine, survivors of the atrazine exposure had significantly lower survival 421 days after being exposed. In other words, effects of early exposure to the chemical were showing up over the long term, such that the net effect of atrazine exposure was even worse later in life than it was while the animals were being exposed.

"The biggest surprise was that it took nearly a year to detect the effects of atrazine at 4 parts per billion, which is just 1 part per billion above the maximum allowable level in drinking water set by the U.S Environmental Protection Agency," said Rohr, who presented his findings at a recent workshop organized by the U.S Geological Survey in St. Louis, Missouri.

"What this tells me is that we need to consider the long-term effects of chemicals, and that exposure to atrazine during formative stages might have permanent effects on these salamanders that increases their risk of mortality," he added.

While the mechanism by which atrazine causes elevated mortality remains unclear, Rohr says other scientists have evidence suggesting that this pesticide is an endocrine disruptor.

Such chemicals disrupt the production of hormones that are vital to normal bodily functions. Concentrations of atrazine as low as 0.1 parts per billion have been shown to cause male frogs to develop both male and female organs by altering their production of sex hormones.

Findings from Rohr's study, which was funded by the U.S Environmental Protection Agency, National Science Foundation, and the Kentucky Academy of Sciences, could have implications for global amphibian declines.

"Salamanders, and amphibians in general, are crucial to ecosystems, as both predators and prey. They can be seen as bioindicators of environmental stress and harbingers of risk

Contact: Amitabh Avasthi
Penn State

Page: 1 2 3

Related biology news :

1. Better sleep may put Huntingtons disease sufferers back on track
2. Male or female factor infertility -- men suffer just the same
3. New treatment increases life time expectancy of patients suffering from advanced liver cancer
4. Coarse particulate matter in air may harm hearts of asthma sufferers, UNC study finds
5. Vaccine hope for sufferers of potentially fatal stomach bug
6. Swell gel could bring relief to back pain sufferers
7. How fish species suffer as a result of warmer waters
8. Wolves are suffering less from inbreeding than expected
9. Hope remains for Alzheimers sufferers
10. New biologic treatment for tennis elbow may replace surgery for chronic sufferers
11. Children of allergy sufferers prone to same problem

Post Your Comments:
TAG: Salamanders suffer delayed effects common herbicide

(Date:9/24/2015)... Publiceringsförbud fram till: ... Kerv ( http://kerv.com ), det Londonbaserade ... första kontaktlösa betalningsring på kickstarter.com i ett ... för massproduktion via crowdfunding.       ... Kerv-bärare kan göra direkta kontaktlösa betalningar ...
(Date:9/10/2015)... Sept. 10, 2015 Pursuant Health has ... to create an interactive, image-based health risk assessment ... wellness kiosk.  The unique assessment quantifies user results ... that suggests an individual,s biological age based on ... measured by the kiosk. Comprised of ...
(Date:9/8/2015)... , Sept. 8, 2015  Affectiva, global ... Emotion as a Service, a new data solution, ... Based on Affectiva,s highly accurate and patented ... analytics capabilities, slated to transform industries such as ... development, retail, customer experience, online education, HR, automotive, ...
Breaking Biology News(10 mins):
(Date:10/9/2015)... Governor Tom Wolf announced today that Adaptimmune ... T-cell receptor cancer immunotherapy treatments, will create at least ... Pennsylvania , and today,s announcement ... high-paying jobs will be created with this project," said ... sustained funding for the life science sector and increased ...
(Date:10/9/2015)... Oct. 9, 2015  DePuy Synthes Trauma* announced today ... Q-PACK ®  Technology**, the only pre-hydrated demineralized cancellous ... procedures (foot and ankle, hand and wrist), including fusion, ... here at the 2015 Orthopaedic Trauma Association (OTA) Annual ... scaffold for new bone growth) and osteoinductive 2,3 ...
(Date:10/9/2015)... ... October 09, 2015 , ... ... the current methods of separating those cells from their surroundings for research, diagnostics, ... the cells. , To address this, Ann Arbor-based startup Akadeum Life Sciences ...
(Date:10/8/2015)... ... October 08, 2015 , ... Researchers at the University of Washington (UW) ... providing a new tool to study how diseases like dementia, Alzheimer's, and brain tumors ... and Ruikang Wang of the UW Department of Bioengineering, today in the Journal ...
Breaking Biology Technology:
Cached News: