HOME >> BIOLOGY >> NEWS
A fish named Wayne-Wanda?

Hermaphrodite fish are on the rise, thanks to the birth control pill and other natural and unnatural forms of estrogen that have made their way into the water. Feminized fish were first found downstream from sewage plants in the United Kingdom.

"Closer to home, we have observed intersex White Perch in various locations in the Great Lakes, " explained Chris Metcalfe, professor of Environmental and Resource Studies at Trent University in Ontario. "And in the Columbia River, there is a much higher proportion of female salmon than males, indicating that some feminization process may be going on."

Metcalfe conducted lab experiments on aquarium fish to try to find out which of the various forms of estrogen were the culprit in the sexual alteration of fish. He will report his research findings as well as share new statistics on estrogen concentrations in water that were generated by the Canadian Department of Environment in Burlington, Ontario, on Monday, November 5, at the Geological Society of America's annual meeting in Boston.

Metcalfe found that very low levels of the estrogen hormones, 17 alpha-ethinylestradiol, 17 beta-estradiol, estrone and estriol, caused intersex and altered sex ratios in the aquarium fish.

"Ethinylestradiol is the active ingredient in the birth control pill," he said. "The other compounds are the natural female estrogen (beta estradiol) and metabolites of that compound excreted by women."

Metcalfe also found from his experiments that estrogen-mimicing degradation products of alkylphenol ethoxylate surfactants (compounds used in such things as pesticides, detergents, and cosmetics) and the plasticizer, Bisphenol A (used in lacquers for dental treatment and to coat food cans and other metal containers), had little or no estrogenic effects on the fish. He believes that it is the female estrogen hormones released from sewage treatment plants that are responsible for the feminization of wild fish.


'"/>

Contact: Ann Cairns
617-954-3214
Geological Society of America
5-Nov-2001


Page: 1

Related biology news :

1. UCSF scientist Joe Derisi named MaCarthur Fellow
2. DuPont scientist named one of the worlds top young innovators by MITs Technology Review Magazine
3. UGA named recipient of $5.6 million grant from NSF for corn improvement
4. USC researcher named General Motors Cancer Research Scholar
5. Device that rapidly detects nerve agents named one of greatest army inventions for 2003
6. Fox Chase Cancer Centers Alfred Knudson Jr. named 2004 Kyoto Prize winner
7. Four tourist destinations named best worldwide
8. UGA professor Jeffrey Bennetzen named to National Academy of Sciences
9. Principal investigators named for international scholars in breast cancer research program
10. Houston scientist named as rising star in chemistry
11. Nerac again named one of Connecticuts fastest growing technology companies

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:6/2/2016)... The Department of Transport Management (DOTM) of ... Dollar project, for the , Supply and Delivery ... IT Infrastructure , to Decatur ... Identity Management Solutions. Numerous renowned international vendors participated in the ... was selected for the most compliant and innovative solution. The ...
(Date:5/20/2016)... May 20, 2016  VoiceIt is excited to ... VoicePass. By working together, VoiceIt and ... VoiceIt and VoicePass take slightly different approaches to ... both security and usability. ... this new partnership. "This marketing and ...
(Date:4/28/2016)... and BANGALORE, India , April 28, ... Systems, a product subsidiary of Infosys (NYSE: INFY ... announced a global partnership that will provide end ... use mobile banking and payment services.      (Logo: ... key innovation area for financial services, but it also plays ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... , June 23, 2016 A person commits ... the crime scene to track the criminal down. ... U.S. Food and Drug Administration (FDA) uses DNA evidence to ... Sound far-fetched? It,s not. The FDA has ... to support investigations of foodborne illnesses. Put as simply as ...
(Date:6/23/2016)... NEW YORK , June, 23, 2016  The ... students to envision new ways to harness living systems ... of Modern Art (MoMA) in New York ... more than 130 participating students, showcased projects at MoMA,s ... included Paola Antonelli , MoMA,s senior curator of ...
(Date:6/23/2016)... ... June 23, 2016 , ... In a new case report published ... how a patient who developed lymphedema after being treated for breast cancer benefitted from ... the paradigm for dealing with this debilitating, frequent side effect of cancer treatment. ...
(Date:6/23/2016)... YORK , June 23, 2016 ... trading session at 4,833.32, down 0.22%; the Dow Jones Industrial ... S&P 500 closed at 2,085.45, down 0.17%. Stock-Callers.com has initiated ... INFI ), Nektar Therapeutics (NASDAQ: NKTR ), ... Therapeutics Inc. (NASDAQ: BIND ). Learn more about ...
Breaking Biology Technology:
Cached News: