Navigation Links
Contaminants linked to sturgeon decline in Columbia river

White sturgeon populations in the Columbia River may be declining due to the presence of elevated amounts of foreign chemicals including DDT and polychlorinated biphenyls in their bodies, according to new studies by researchers at Oregon State University.

The research by Carl Schreck and Grant Feist, biologists in OSU's College of Agricultural Sciences, has been published in the journals Environmental Health Perspectives and Archives of Environmental Contamination and Toxicology.

Their research shows that white sturgeon living in the Columbia River in some areas above Bonneville Dam have high amounts of toxic contaminants in their livers, sex organs and muscle tissue.

"We don't know the exact source of contamination," Schreck said. "The fish move, the stuff they eat moves and the water and sediments bearing the contaminants moves. The Columbia receives input from numerous sources, so any population of fish at any one site can be exposed to a myriad of substances."

The OSU researchers say it is difficult to estimate the numbers of sturgeon in the Columbia, but there has been a noticeable decline in the number of young fish, indicating productivity is poor, especially in the impounded areas above dams.

In the past, any decreases in population were thought to be linked to the presence of dams, which have changed the temperature and flow of the river. And despite fish ladders in place for salmon, the bottom-dwelling white sturgeon rarely navigate dams successfully making it difficult for them to expand their habitat or access oceanic food sources.

Schreck and Feist studied white sturgeon from three reservoirs along the Columbia River and from areas downstream of Bonneville, the last dam on the river in its path to the Pacific Ocean. The researchers found some of the fish living in reservoirs behind the dams had concentrations of chemicals up to 20 times higher than the fish below Bonneville. The contamination was most sig
'"/>

Source:Oregon State University


Page: 1 2

Related biology news :

1. Newly discovered virus linked to childhood lung disorders and Kawasaki disease
2. Low level of extinction during ice age linked to adaptability
3. Improved statistical tools reveal many linked loci
4. Scientists at Galileo Pharmaceuticals confirm inflammatory response linked to glucose levels
5. Attacks of King George IIIs madness linked to key metabolism molecule
6. Gene controlling circadian rhythms linked to drug addiction
7. Physical and functional interaction of key cell growth molecules linked to cancer
8. VCU Massey Cancer Center study shows enzyme linked to spread of breast cancer cells
9. Naturally occurring asbestos linked to lung cancer
10. Disappearing arctic lakes linked to climate change
11. Genes linked to treatment resistance in children with leukemia
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Contaminants linked sturgeon decline Columbia river

(Date:10/17/2014)... German . ... in order to reproduce? And why are there two sexes ... latest issue of the research journal Molecular Human Reproduction ... Ramm from Bielefeld University Bielefeld has compiled this special issue ... a female to copulate with several males in quick succession ...
(Date:10/16/2014)... Virginia Institute of Marine Science have received a ... to identify the streams and wetlands most vulnerable ... help local governments and citizens conserve these important ... dataset of tidal-marsh observations first gathered by VIMS ... baseline can today,s researchers accurately map the slow ...
(Date:10/16/2014)... Syncytial Virus causes severe respiratory tract infections and ... year. Scientists at VIB and Ghent University have ... counteract this common virus infection. , Xavier ... that paves the way for the development of ... virus that causes suffering in numerous small children ...
Breaking Biology News(10 mins):Sperm wars 2EPA grant will help localities conserve headwater wetlands 2EPA grant will help localities conserve headwater wetlands 3New perspectives for development of an RSV vaccine 2
... University professor of physics and astronomy Apparao Rao has ... Fellows are elected by their peers for outstanding contributions ... one half of 1 percent of the membership. ... nanotubes and for elucidating the properties of carbon nanotubes ...
... PITTSBURGHUniversity of Pittsburgh researchers have developed the first ... finding that could help diminish the environmental and ... of the super-strong materials commonly used in products, ... team has found that carbon nanotubes deteriorate when ...
... 16, 2008) Researchers from Virginia Commonwealth University have identified ... and suppress a key protein that is overexpressed in 90 ... to an effective gene therapy for cancer. According ... the Department of Human and Molecular Genetics and director of ...
Cached Biology News:Pitt researchers create non-toxic clean-up method for potentially toxic nano materials 2Researchers identify new anti-tumor gene 2
(Date:10/19/2014)... 19, 2014 The report "Unmanned ... Homeland Security), Technology, Payload, Type & by Geography ... the global unmanned ground vehicle market into various ... of market sizes. The report also identifies the ... impacting it along with the adoption trends. , ...
(Date:10/18/2014)... The Asian arthroscopic devices report defines and segments the ... revenue. The arthroscopic devices market in Asia is estimated ... CAGR of 6.5% from 2013 to 2018. , Browse ... to get an idea of the in-depth analysis provided. ... arthroscopic devices market in the same region, and is ...
(Date:10/18/2014)... According to a new market research report ... Global Trends & Forecasts up till 2017”, hydraulic fracturing ... This value is expected to increase from $40 billion ... CAGR during the same period. North America is expected ... terms of hydraulic horse power supplied by the year ...
(Date:10/17/2014)... and HILDEN, Germany ...   , Translational research in cancer ... being presented at the American Society of Human ... 250,000-plus DNA samples linked to Ingenuity ®  Knowledge ... for genomic analysis  Ingenuity ®  Variant ...
Breaking Biology Technology:Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 2Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 3Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 4Unmanned Ground Vehicle (UGV) Market Estimated to Reach $8.26 Billion by 2020 - New Research Report by MarketsandMarkets 5The Asian arthroscopic devices market is estimated to grow to $712.3 million by 2018 - New Report by MicroMarket Monitor 2The Asian arthroscopic devices market is estimated to grow to $712.3 million by 2018 - New Report by MicroMarket Monitor 3The Asian arthroscopic devices market is estimated to grow to $712.3 million by 2018 - New Report by MicroMarket Monitor 4Hydraulic Fracturing Market Projected To Reach $64 Billion by 2017 - New Report by MarketsandMarkets 2Hydraulic Fracturing Market Projected To Reach $64 Billion by 2017 - New Report by MarketsandMarkets 3Hydraulic Fracturing Market Projected To Reach $64 Billion by 2017 - New Report by MarketsandMarkets 4QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 2QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 3QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 4QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 5QIAGEN Demonstrates Expanded Bioinformatics Workflows at ASHG; Strong Market Adoption as Researchers Analyze Genomic Data on More Than a Quarter-Million Samples in Secure Private Cloud 6
... 14 IDS is pleased to announce,that their new, ... the specific assessment of type I collagen levels in ... is the first commercial EIA to allow the,specific assessment ... use,of this assay will aid the assessment of new ...
... N.J., Jan. 11 Genta,Incorporated (Nasdaq: GNTA ... from the Listing Qualifications Staff of The NASDAQ ... the stockholders, equity,requirement set forth in NASDAQ Marketplace ... delisting from The NASDAQ Global Market unless,the Company ...
... 11 Barr Pharmaceuticals,Inc. (NYSE: BRL ) ... initiated a challenge of the patent listed by ... tablets, 5mg and 10mg., Barr filed its ... certification for a generic Namenda product with the ...
Cached Biology Technology:A New, Unique and Unrivalled Rat/Mouse PINP Assay for Pharmaceutical, Clinical and Academic Research Organizations. 2Genta Receives Notice of Non-Compliance With NASDAQ Rule 2Genta Receives Notice of Non-Compliance With NASDAQ Rule 3Barr Confirms Patent Challenge of Namenda(R) Tablets, 5mg & 10mg 2Barr Confirms Patent Challenge of Namenda(R) Tablets, 5mg & 10mg 3
... Provides a fast and easy method ... mitochondrial fraction from mammalian tissues. Most ... inner and outer membranes. The kit ... studies and proteome profiling. Also included ...
Sufficient reagents for 50 applications.Mitochondria Isolation Kit Reagent A, 50 ml Mitochondria Isolation Kit Reagent B, 500 l Mitochondria Isolation Kit Reagent C, 70 ml...
...
... stirrers deliver accurate and repeatable ... away from internal components. The ... which allow users to dial-in ... feature a chemical resistant, reflective ...
Biology Products: