Navigation Links
Gender-bending fish problem in Colorado creek mitigated by treatment plant upgrade
Date:6/21/2010

rmally produced by females.

Contaminants identified in Boulder Creek included ethinylestradiol -- a chemical used in most contraceptives -- as well as other reproductive steroids produced naturally by humans. Estrogen-related chemicals found in the water included bisphenyl A and phthalates associated with plastic, nonylphenols associated with detergents, and pesticides. Most of the compounds came from products flushed down toilets and drains, according to Norris.

In the new study following the treatment plant upgrade, the team studied adult male fathead minnows in 100 percent effluent water, those in a mixture of half effluent and half upstream water, and those in tanks containing all upstream water. Norris and his team saw no effects on male sex characteristics of the minnows in the tank containing 100 percent effluent water directly from the treatment plant until 28 days after exposure.

As part of the study, Norris and his colleagues also analyzed reproductive organs from preserved fish specimens from CU's Museum of Natural History that had been collected from Boulder Creek between 50 and 100 years ago. The researchers and found no evidence of feminized or intersex fish in the museum specimens, he said.

The CU research team also tested brown trout populations below a wastewater treatment in Vail, Colo., said Norris. The trout showed no increases in vitellogenin.

In addition to chemicals that trigger fish feminization, biologists are finding increased concentrations of fluoxetine, a common antidepressant taken by millions of Americans, in waterways across the nation, said Norris. Fluoxetine has been shown to enter the brains of fish and affect fish behavior, said Norris.

Between 2000 and 2002, Norris and his group were among the first in the nation to document the problem of intersex fish following their stream surveys of Boulder Creek, the South Platte River near Denver and Fountain Creek near Colorado
'/>"/>

Contact: David Norris
David.Norris@colorado.edu
303-492-8379
University of Colorado at Boulder
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Abnormal fat metabolism underlies heart problems in diabetic patients
2. Study finds blocking angiogenesis signaling from inside cell may lead to serious health problems
3. Prolonged respiratory problems for oil spill clean-up volunteers
4. Reversing cognitive deficits: Injectable antibody may attack source of problem
5. New thoracic imaging approach can pinpoint underlying venous problems
6. UC-Riverside partners with Chinese university to address Chinas environmental problems
7. Computer solution to delivery problem
8. Closeness is not a problem: New ways to handle spatial dependencies in species distributions
9. Columbia researchers: Growth of CT scan use may lead to significant public health problem
10. Physician-scientists seek solutions to reproductive problems related to chromosomal variations
11. JILA solves problem of quantum dot blinking
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Gender-bending fish problem in Colorado creek mitigated by treatment plant upgrade
(Date:10/22/2014)... -- Aware, Inc. (NASDAQ: AWRE ), a leading ... for its third quarter ended September 30, 2014. ... an increase of 40% compared to $4.3 million in the ... of 2014 was $4.1 million compared to $1.0 million in ... current three month period was primarily due to: i) a ...
(Date:10/18/2014)... a group of 2,000 patients referred for evaluation ... potential molecular diagnosis for 25 percent, including detection ... new mutations contributing to disease, according to a ... is being released to coincide with the American ... sequencing analyzes the exons or coding regions of ...
(Date:10/17/2014)... . Why do ... to reproduce? And why are there two sexes anyway? These ... of the research journal Molecular Human Reproduction published ... Bielefeld University Bielefeld has compiled this special issue on sperm ... to copulate with several males in quick succession – chimpanzees ...
Breaking Biology News(10 mins):Aware, Inc. Reports Third Quarter 2014 Financial Results 2Aware, Inc. Reports Third Quarter 2014 Financial Results 3Aware, Inc. Reports Third Quarter 2014 Financial Results 4Aware, Inc. Reports Third Quarter 2014 Financial Results 5Aware, Inc. Reports Third Quarter 2014 Financial Results 6Aware, Inc. Reports Third Quarter 2014 Financial Results 7Whole-exome sequencing shows potential as diagnostic tool 2Sperm wars 2
... recently discovered compound from the aminopyridine class not only has ... all strains of malaria, but might also be able to ... to a research collaboration involving the Medicines for Malaria Venture ... Centre (H3-D) at the University of Cape Town, South Africa. ...
... cells perform an array of essential functions, including cell ... and out of cells. They are critical targets for ... as disease biomarkers early warning beacons announcing the ... study of the binding properties of membrane proteins is ...
... Disruptions to the circadian rhythm can affect the growth of ... diabetes, obesity, and cancer, according to a new study from ... is regulated by a "clock" that reacts to both incoming ... in the scientific journal Cell Reports , it is ...
Cached Biology News:African research identifies strong candidate for possible single-dose malaria cure 2African research identifies strong candidate for possible single-dose malaria cure 3A new look at proteins in living cells 2A new look at proteins in living cells 3A new look at proteins in living cells 4
(Date:10/22/2014)... 2014 Shimadzu Scientific Instruments introduces its ... for the pain management and clinical markets. The software ... review by allowing users to highlight and review results ... QuantAnalytics allows analysts to filter results by group or ... by eliminating the need to sift through analytes of ...
(Date:10/22/2014)... 22, 2014 Currently offering a ... & D Weighing, Rice Lake, and Ohaus, Pipette.com ... . The Sartorius CPA Semi-Micro Balance is ideal ... precise, and user-friendly laboratory balance. , Sartorius is ... their laboratory balances are well known for their ...
(Date:10/22/2014)... According to new market research report ... Integration, Deployment & Support), by Service Model (SaaS, ... Others (Hybrid & Community)) - Global Forecast to ... Cloud Professional Services Market into various sub-segments with ... also identifies the drivers and restraints for this ...
(Date:10/22/2014)... 22, 2014 Nuvilex, Inc. (OTCQB: NVLX) – ... people worldwide are living with diabetes, with  that number ... The global market for diabetes treatments is approximately $500 ... worldwide died from pancreatic cancer.  Pancreatic cancer is the ... in the United States , and ...
Breaking Biology Technology:Shimadzu Releases QuantAnalytics Open Access LCMS Software Package for Clinical Applications 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 2Pipette.com Launches the Addition of Sartorius CPA Semi-Micro Balance to Their Product Portfolio with Special Promotional Pricing 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 2Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 3Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 4Cloud Professional Services Market by Public, Private, Hybrid & Community Expected to Reach $34.41 Billion by 2019 - New Report by MarketsandMarkets 5Nuvilex Brief Analyst Report: Thinking Outside the Box by BrokerBank Securities, Inc. 2
... issued on 03/24/09 to NexGen Biomedical, Inc. founder Mark ... of treating lung, brain, pancreatic, breast and colon cancers ... overexpression (also called EGFR or c-ErbB-1). The patent ... / S-Phase cytotoxic protocols achieve only a fraction of ...
... HUNTINGTON BEACH, California and AMSTERDAM, The Netherlands, March ... diagnostics,today announced that the Company is scheduled to ... Biotech Industry" Conference on Thursday,April 2, 2009. Presented ... has built a reputation as a major biotech ...
... SUNNYVALE, Calif. March 24 Cepheid (Nasdaq: ... revolutionize the speed of diagnosis of Mycobacterium tuberculosis ... for the disease.The new test technology, developed in partnership ... University of Medicine and Dentistry of New Jersey ...
Cached Biology Technology:Patent for Making Combination Chemotherapy Work Better 2Cepheid Announces New Diagnostic Technology to Aid World Efforts in Halting the Spread of Mycobacterium Tuberculosis (TB) 2Cepheid Announces New Diagnostic Technology to Aid World Efforts in Halting the Spread of Mycobacterium Tuberculosis (TB) 3Cepheid Announces New Diagnostic Technology to Aid World Efforts in Halting the Spread of Mycobacterium Tuberculosis (TB) 4Cepheid Announces New Diagnostic Technology to Aid World Efforts in Halting the Spread of Mycobacterium Tuberculosis (TB) 5Cepheid Announces New Diagnostic Technology to Aid World Efforts in Halting the Spread of Mycobacterium Tuberculosis (TB) 6
Best pricing for 100mg-1.0g scales. Phosphopeptides are our specialty....
... 2D is an automated, two-dimensional fractionation system ... Part of Beckman Coulters ProteomeLab family ... in just hours. The system effectively ... cell lysates, addressing a key challenge in ...
... The Rapid-Screen cDNA Library Panels were designed ... three sets of PCRs to identify the ... is performed in a 96-well "Master Plate," ... 5,000 clones. Having identified the positive well(s) ...
... HORIBA Jobin Yvons Protein 295 ex ... a protein sample in only a few ... the amino acids tyrosine and tryptophan, the ... powerful NanoLED-17, a pulsed diode emitting 295 ...
Biology Products: