Navigation Links
Pitt research suggests EPA pesticide exposure test too short, overlooks long term effects
Date:8/17/2009

t kill one the world's most susceptible species in four days, then the four-day test period may not adequately gauge the long-term effects on larger, less-sensitive species.

"When a pesticide's toxic effect takes more than four days to appear, it raises serious concerns about making regulatory decisions based on standard four-day tests for any organism," Relyea said. "For most pesticides, we assume that animals will die during the period of exposure, but we do not expect substantial death after the exposure has ended. Even if EPA regulations required testing on amphibians, our research demonstrates that the standard four-day toxicity test would have dramatically underestimated the lethal impact of endosulfan on even this notably sensitive species."

Andrew Blaustein, a professor in Oregon State University's nationally ranked Department of Zoology, who is familiar with the Pitt study, said the results raise concerns about standards for other chemicals and the delayed dangers that might be overlooked. Some of the frog eggs the Pitt team used had been collected by Blaustein's students for an earlier unrelated experiment, but he had no direct role in the current research.

"The results are somewhat alarming because standards for assessing the impacts of contaminants are usually based on short-term studies that may be insufficient in revealing the true impact," Blaustein said. "The implications of this study go beyond a single pesticide and its effect on amphibians. Many other animals and humans may indeed be affected similarly."

Tadpoles in the Pitt project spent four days in 0.5 liters of water containing endosulfan concentrations of 2, 6, 7, 35, 60, and 296 parts-per-billion (ppb), levels consistent with those found in nature. The team cites estimates from Australiawhere endosulfan is widely usedthat the pesticide can reach 700 ppb when sprayed as close as 10 meters from the ponds amphibians typically call home and 4 ppb when sprayed
'/>"/>

Contact: Morgan Kelly
mekelly@pitt.edu
412-624-4356
University of Pittsburgh
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Research shows skeleton to be endocrine organ
2. Newly created cancer stem cells could aid breast cancer research
3. Dominant cholesterol-metabolism ideas challenged by new research
4. Researchers identify proteins involved in new neurodegenerative syndrome
5. Texas researchers and educators head for Antarctica
6. MGH researchers describe new way to identify, evolve novel enzymes
7. University of Pennsylvania researchers develop formula to gauge risk of disease clusters
8. University of Oregon researcher finds that on waters surface, nitric acid is not so tough
9. U of MN researchers discover noninvasive diagnostic tool for brain diseases
10. U of Minnesota researchers discover noninvasive diagnostic tool for brain diseases
11. Story ideas from the Journal of Lipid Research
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/10/2014)... 2014  Pomerantz LLP has filed a class ... the "Company")(NYSE-MKT: PVCT) and certain of its officers.  ... Court, Middle District of Tennessee ... class consisting of all persons or entities who ... 17, 2013 and May 22, 2014, both dates ...
(Date:7/10/2014)... , July 2, 2014 NXT-ID, Inc., (OTCQB: NXTD) a biometric ... CEO Mr. Gino Pereira was interviewed on July ... Tampa Florida . Mr. Pereira discusses the ... Cedric Harris and how the Wocket™ aims to replace ... Cedric Harris tells Gino he has ...
(Date:7/10/2014)... Fingerprint Cards, (FPC,s) new mobile touch ... Asian OEM has selected FPC1021 for a flagship model with ...   FPC is proud to announce this DW ... for start of mass production in August 2014. FPC has ... delivery in the first half of July. The OEM wants ...
Breaking Biology News(10 mins):SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 2SHAREHOLDER ALERT: Pomerantz Law Firm Announces the Filing of a Class Action against Provectus Biopharmaceuticals, Inc. and Certain Officers - PVCT 3Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 2Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 3Security and Your Money: Tampa Bay Radio Host Cedric Harris Talks to NXT-ID CEO Mr. Gino Pereira about the Wocket Smart Wallet 4FPC Wins DW and Initial Ramp Order for FPC1021 Touch Sensor for Flagship Smartphone from Asian OEM 2
... made the world,s temperature records available via Google Earth. ... temperature dataset is one of the most widely used records ... allows users to scroll around the world, zoom in on ... data more easily than ever before. Users can drill ...
... . . . With the installation this ... Arena will become the first major sports venue to ... 85 percent more efficient than conventional arena metal halide ... LED North America incorporate an Oak Ridge National Laboratory-developed ...
... of 11,500 km2 within the Arabian Peninsula. Both Qatar,s ... decades, thus putting a strong pressure on native species. ... has triggered a variety of studies of its dwindling ... the occurrence of 21 lizard species, two of them ...
Cached Biology News:World temperature records available via Google Earth 2Story tips from the Department of Energy's Oak Ridge National Laboratory, February 2014 2Story tips from the Department of Energy's Oak Ridge National Laboratory, February 2014 3Where do lizards in Qatar live? First distribution maps for the state 2
(Date:7/10/2014)... July 10, 2014 Women in ... access to an additional family planning option. Sayana® ... contraception at all levels of the health system ... of a widely used contraceptive—Pfizer’s Depo-Provera® (depot medroxyprogesterone ... Faso is the first of four African countries ...
(Date:7/10/2014)... July 10, 2014 Unraveling life’s mysteries ... The Archer Family purchased a DNA test ... but ended up with a lifetime of memories, sharing, ... the family members’ DNA genuinely brought the family closer ... search deeper into genetic history and prior to taking ...
(Date:7/10/2014)... Ind. , July 10, 2014 /PRNewswire/ ... its use of capnography for respiratory monitoring ... group of healthcare leaders in embracing state-of-the-art ... how effectively patients are breathing and can ... occurs. By measuring the amount of carbon ...
(Date:7/10/2014)... 10, 2014   Ceres, Inc . (Nasdaq: ... announced today financial results for the three months ended ... business. Ceres reported that the company and ... this growing season in Brazil, which concluded in June, ... sorghum evaluation areas for part of the growing season. ...
Breaking Biology Technology:Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 2Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 3Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 4Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 5Injectable Contraceptive Launched in Burkina Faso to Expand Choice and Address Unmet Need 6Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 2Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 3Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 4Ancestry DNA Test Reveals a Controversial and Undiscovered Family History 5Franciscan St. Anthony Health-Crown Point Underscores Patient Safety Commitment Through Expanded Use of Capnography 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9
... 17 , - MedITEX IVF Facilitates ... - MedITEX from 28 June to 1 ... The IT consulting company CRITEX, which specialises in ... fertilisation, MedITEX IVF,at the 25th Annual Meeting of the European Society ...
... , FREMONT, Calif., June 16 Microfluidic Systems, ... patent number 7,541,166, entitled "Sonication to Selectively Lyse ... the process of differential extraction of male/female DNA ... in a wide variety of biological sample processes ...
... and Webcast on Wednesday, June 17 at 8:30 a.m. Eastern ... Savient Pharmaceuticals, Inc. (Nasdaq: SVNT ) announced ... Food and Drug Administration (FDA) recommended by a vote of ... PEGylated uricase enzyme, be granted marketing approval by the FDA ...
Cached Biology Technology:New IVF Software MedITEX to be Presented at the ESHRE Exhibition 2MicroFluidic Systems (MFSI) Receives Patent for Method to Selectively Process Different Biological Cell Types for Analysis. 2FDA Appointed Arthritis Advisory Committee Recommends U.S. Food and Drug Administration Approval for KRYSTEXXA(TM) for Refractory Chronic Gout 2FDA Appointed Arthritis Advisory Committee Recommends U.S. Food and Drug Administration Approval for KRYSTEXXA(TM) for Refractory Chronic Gout 3FDA Appointed Arthritis Advisory Committee Recommends U.S. Food and Drug Administration Approval for KRYSTEXXA(TM) for Refractory Chronic Gout 4
Smac/DIABLO (CT) - IgG for Western Blotting, Host: Rabbit Family: Smac/DIABLO...
Mouse Amphiregulin MAb (Clone 206220)...
Anti-Digoxigenin-AP, Fab fragments; from sheep...
The antibody recognizes the peptide sequence ESESQGPK (aa 441-448) of human class III beta-tubulin specific for neurones....
Biology Products: