Navigation Links
Pesticide atrazine can turn male frogs into females
Date:3/1/2010

Atrazine, one of the world's most widely used pesticides, wreaks havoc with the sex lives of adult male frogs, emasculating three-quarters of them and turning one in 10 into females, according to a new study by University of California, Berkeley, biologists.

The 75 percent that are chemically castrated are essentially "dead" because of their inability to reproduce in the wild, reports UC Berkeley's Tyrone B. Hayes, professor of integrative biology.

"These male frogs are missing testosterone and all the things that testosterone controls, including sperm. So their fertility is as low as 10 percent in some cases, and that is only if we isolate those animals and pair them with females," he said. "In an environment where they are competing with unexposed animals, they have zero chance of reproducing."

The 10 percent or more that turn from males into females ‑ something not known to occur under natural conditions in amphibians ‑ can successfully mate with male frogs but, because they are genetically male, all their offspring are male.

"When we grow these guys up, depending on the family, we will get anywhere from 10 to 50 percent females," Hayes said. "In a population, the genetically male females can decrease or wipe out a population just because they skew sex ratios so badly."

Though the experiments were performed on a common laboratory frog, the African clawed frog (Xenopus laevis), field studies indicate that atrazine, a potent endocrine disruptor, similarly affects frogs in the wild, and could possibly be one of the causes of amphibian declines around the globe, Hayes said.

Hayes and his UC Berkeley colleagues report their results in this week's online early edition of the journal Proceedings of the National Academy of Sciences. Last week, Hayes and colleagues published a review of pesticide's effects on amphibians in the Journal of Experimental Biology, concluding that a
'/>"/>

Contact: Robert Sanders
rsanders@berkeley.edu
510-643-6998
University of California - Berkeley
Source:Eurekalert

Page: 1 2 3 4

Related biology news :

1. Storm runoff and sewage treatment outflow contaminated with household pesticides
2. A deadly scorpion provides a safe pesticide
3. Even at sublethal levels, pesticides may slow the recovery of wild salmon populations
4. Getting plants to rid themselves of pesticide residues
5. Pesticides -- easier detection of pollution and impact in rivers
6. Pitt research suggests EPA pesticide exposure test too short, overlooks long term effects
7. Natural seed treatment could drastically cut pesticide use
8. Parasite-resistant peppers green alternatives to chemical pesticides
9. Pitt research finds that low concentrations of pesticides can become toxic mixture
10. Pesticide concentrations decreasing
11. Pesticide build-up could lead to poor honey bee health
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/21/2014)... REDMOND, Wash. , Nov. 20, 2014 ... access for the Internet of Things (IoT), today announced ... position of chief operating officer. Previously a strategic advisor ... marketing, finance, and operations. Mr. Traynor is based out ... . He reports to Chris Muench , ...
(Date:11/18/2014)... -- The Secure Identity & Biometrics Association (SIBA) and ... formation of The Airport Entry and Exit Working ... Biometric Entry and Exit Solutions Framework for Airports ... BORDERPOL, the international non-profit organization that works directly ... border security, traveler and migration systems. ...
(Date:11/18/2014)... 2014 The Parenteral Drug Association (PDA) today confirmed ... speak and at least seven more will participate in the ... Shoreham Hotel in Washington D.C. , Dec. ... significant support from the regulatory agencies in the ... in our effort to help advance the use of metrics ...
Breaking Biology News(10 mins):C-Labs Names Former Microsoft and Bsquare Executive as Chief Operating Officer 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 2Identity Management, Document Authentication and Biometric Companies Form "The Airport Entry and Exit Working Group", Releasing the Framework to Help Guide the Department of Homeland Security and Congress Towards Solutions 3FDA's Janet Woodcock, EMA's Emer Cooke Headline PDA Quality Metrics Conference 2
... As solitary animals, giant pandas have developed a number of ... come into close contact. One means of this communication ... Diego Zoo Global researchers, collaborating with researchers at the Institute ... clear and specific choices about what trees are used for ...
... protect plants from freezing are placed in storage during ... In the current issue of the Proceedings ... University Distinguished Professor of molecular genetics, demonstrates how the ... during warmer months when days are long, and how ...
... abundance from Indonesia eastward to Fiji, Samoa, and the Line ... of the Americas, according to a team of researchers led ... State University. Darwin hypothesized in 1880 that most species could ... the first comprehensive test of that hypothesis using coral. The ...
Cached Biology News:Darwin discovered to be right: Eastern Pacific barrier is virtually impassable by coral species 2Darwin discovered to be right: Eastern Pacific barrier is virtually impassable by coral species 3Darwin discovered to be right: Eastern Pacific barrier is virtually impassable by coral species 4
(Date:12/22/2014)... Dec. 22, 2014  ( www.competitivehealth.com ) — Competitive ... medical bill review and advocacy service, has signed an ... WellCard Savings discount health services marketplace. 63% ... more than they expected to pay. As part of ... costs, WellCard Savings is pleased to offer medical bill ...
(Date:12/22/2014)... 22, 2014 Fertility Associates of Memphis ... Bank USA , a network of more than 20 ... partnership, patients have fast access to a national pool ... IVF . Fertility Associates of Memphis is the only ... treatment option. , Dr. William Kutteh , director ...
(Date:12/19/2014)... BioPlus Specialty Pharmacy (BioPlus), one ... of Nick Maroulis, Pharm.D. to the newly created position ... In this position, Dr. Maroulis will continue to manage ... of our multi-site pharmacies as the company expands. Dr. ... that time he has served in many different capacities ...
(Date:12/19/2014)... Dec. 19, 2014 Bina Technologies, Inc. (Bina, ... that they have been acquired by Roche (SIX: RO, ... privately held company that provides a big data platform ... (NGS) data for the academic and translational research markets. ... and will continue to focus on development of their ...
Breaking Biology Technology:WellCard Savings Announces CoPatient Medical Bill Review Service for Members 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 2Fertility Associates of Memphis Announces Partnership with Donor Egg Bank USA 3BioPlus Specialty Pharmacy Promotes Dr. Nick Maroulis to Vice President of Specialty Pharmacy Services 2Bina Technologies is acquired by Roche. 2Bina Technologies is acquired by Roche. 3
... 5 Experts from PAREXEL International Corporation (Nasdaq: ... services provider, will address important industry issues at ... being held from March 23 - 25, 2009 ... leaders will present on topics ranging from global ...
... BEACH, California and AMSTERDAM, March 5 ,Agendia, a ... the,appointment of Dr. Albert A. (Al) Luderer to ... Dr. Luderer has more than 30 years of ... therapeutic development. Currently, he,is the Chief Executive Officer ...
... WALTHAM, Mass., March 5 Proteon Therapeutics, Inc., announced ... Series B equity financing, led by MPM Capital on ... L.P. This announcement follows the initiation of a ... PRT-201, in patients with end stage renal disease undergoing ...
Cached Biology Technology:PAREXEL Experts to Present Leading Insights at Drug Information Association 21st Annual Euromeeting 2PAREXEL Experts to Present Leading Insights at Drug Information Association 21st Annual Euromeeting 3PAREXEL Experts to Present Leading Insights at Drug Information Association 21st Annual Euromeeting 4PAREXEL Experts to Present Leading Insights at Drug Information Association 21st Annual Euromeeting 5Agendia Appoints Seasoned Diagnostics Executive Albert A. Luderer to Supervisory Board 2Proteon Therapeutics Completes $38M Equity Financing; Initiates Phase 1/2 Clinical Study of PRT-201 in Hemodialysis Patients and Signs Option Agreement With Major Pharmaceutical Company 2
... Goat polyclonal to Cholesterol Oxidase ... / Specificity Cross-reacts with bacteria. Not ... Information Cholesterol oxidases exist as both ... are implicated in bacterial pathogenesis. In addition, ...
Phospho-PERK (Thr980) Antibody...
Goat polyclonal to BACE1 ( Abpromise for all tested applications). entrezGeneID: 23621 SwissProtID: P56817...
Sheep polyclonal to Staphylococcus DNase ( Abpromise for all tested applications). Antigen: Full length native protein (purified)....
Biology Products: