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:3/22/2017)... Optimove , provider of the ... as 1-800-Flowers and AdoreMe, today announced two new ... Using Optimove,s machine learning algorithms, these features allow ... recommendations to their customers based not just on ... intent drawn from a complex web of data ...
(Date:3/16/2017)... Germany , March 16, 2017 CeBIT 2017 - Against identity ... Continue Reading ... Used combined in one project, multi-biometric solutions provide ... Used ... Systems) ...
(Date:3/7/2017)... , March 7, 2017 Brandwatch , the ... by The Prince,s Trust to uncover insights to support ... The Trust. The UK,s leading youth charity will be ... campaign results and get a better understanding of the topics and ... ...
Breaking Biology News(10 mins):
(Date:3/23/2017)... March 23, 2017 According to a report ... derivatives market is fragmented due to the presence of a large pool ... Thermo Fisher , and Sigma-Aldrich, compete with each other in ... collectively, held more than 76% of this market in 2016.  ... As of now, a ...
(Date:3/23/2017)... ... March 23, 2017 , ... ... today announced the hire of Dr. Sigmund “Sig” Floyd as Vice President ? ... partnerships and joint development activities. , “Dr. Floyd’s career has spanned 30 years ...
(Date:3/22/2017)... 2017  Ascendis Pharma A/S (Nasdaq: ASND), a ... to address significant unmet medical needs in rare ... year ended December 31, 2016. ... as we broadened our pipeline and pursued our ... company with an initial focus on endocrinology," said ...
(Date:3/22/2017)... 2017 Oramed Pharmaceuticals Inc. (NASDAQ: ... ), a clinical-stage pharmaceutical company focused ... announced today that Dr. Miriam Kidron , ... titled, "Oral Insulin for Diabetes Treatment: Bypassing the ... and Peptide Therapeutics (OPT) Boston Conference in ...
Breaking Biology Technology:
Cached News: