Featured Research

from universities, journals, and other organizations

Baylor Toxicologist Identifies Pharmaceutical Contaminants In Texas Waters, Fish

Date:
October 27, 2003
Source:
Baylor University
Summary:
Pharmaceutical contaminants found in tissues of fish caught downstream from urban areas in a north Texas river could cause behavioral changes in fish that impact their ability to survive, according to research by a Baylor University toxicologist.

Pharmaceutical contaminants found in tissues of fish caught downstream from urban areas in a north Texas river could cause behavioral changes in fish that impact their ability to survive, according to research by a Baylor University toxicologist.

Related Articles


Dr. Bryan Brooks, an assistant professor of environmental studies at Baylor's Center for Reservoir and Aquatic Systems Research, has measured fluoxetine, an ingredient in antidepressants, in fish from Pecan Creek, north of Dallas. Fluoxetine is not controlled by EPA regulations for treated wastewater.

Antidepressant accumulation in the fish can cause behavioral changes, which impact aggression, mating and other behaviors necessary for fish survival.

Although treated Texas waters may meet current federal standards, Brooks said no guidelines or federal testing standards exist for pharmaceuticals because their effects in surface waters are not well understood.

The flow of the Trinity River south of Dallas and Fort Worth is greater than 90 percent dominated by wastewater releases. Wastewater refers to water that has been treated and released downstream from urban areas.

In lab and artificial stream studies, Brooks has observed the effects on fish and invertebrates of another class of pharmaceuticals, the active ingredients in birth control medications. Male fish exposed to estrogen have been shown to develop female physical characteristics and lose the ability to reproduce.

"At critical exposure levels, some fish can't reproduce at all, and some have both male and female sexual characteristics," Brooks said.

Another concern Brooks expressed is how the substances may affect humans who eat the fish. “If substances accumulate in fish tissue, and humans ingest them through fish, we don’t know if they’ll be affected,” Brooks said. He added that exposure appears to be below therapeutic levels, but the issue calls for more research to understand the responses of aquatic organisms to pharmaceutical exposures.

Brooks will present his findings at the annual meetings of the Society of Environmental Toxicology and Chemistry (SETAC) in Austin and the Geological Society of America (GSA) in Seattle in November.

Chemosphere, 52: 135-142; Toxicological Sciences, 72: 77-83; Archives of Environmental Contamination and Toxicology, In Press; Bulletin of Environmental Contamination and Toxicology, 71: 504-511.


Story Source:

The above story is based on materials provided by Baylor University. Note: Materials may be edited for content and length.


Cite This Page:

Baylor University. "Baylor Toxicologist Identifies Pharmaceutical Contaminants In Texas Waters, Fish." ScienceDaily. ScienceDaily, 27 October 2003. <www.sciencedaily.com/releases/2003/10/031027062715.htm>.
Baylor University. (2003, October 27). Baylor Toxicologist Identifies Pharmaceutical Contaminants In Texas Waters, Fish. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2003/10/031027062715.htm
Baylor University. "Baylor Toxicologist Identifies Pharmaceutical Contaminants In Texas Waters, Fish." ScienceDaily. www.sciencedaily.com/releases/2003/10/031027062715.htm (accessed October 25, 2014).

Share This



More Plants & Animals News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins