HOME >> BIOLOGY >> NEWS
Contaminants linked to sturgeon decline in Columbia river

CORVALLIS, Ore. 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 contamin
'"/>

Contact: Carl Schreck
carl.schreck@oregonstate.edu
541-737-1961
Oregon State University
7-Apr-2006


Page: 1 2

Related biology news :

1. Protein chatter linked to cancer activation
2. Risk of common vaginal infection linked to preterm birth appears higher for blacks
3. Scientists show that mitochondrial DNA variants are linked to risk factors for type 2 diabetes
4. Antibody linked to MS significantly higher in spinal fluid of blacks
5. Loss of cells antenna linked to cancers development
6. Scientists identify first gene linked to scoliosis
7. Gum disease in postmenopausal women linked to oral bone loss
8. Screening approach leads to discovery of gene linked to breast cancer
9. Sensitivity to diverse range of chemotherapeutic drugs linked to common pathway
10. Dietary preferences and patterns may be linked to genes
11. Malaria and Epstein-Barr virus linked to pediatric cancer in Africa

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


(Date:7/31/2018)... ... July 31, 2018 , ... GSL Biotech ... with LabArchives , the leading cloud-based Electronic Lab Notebook (ELN) platform. , ... researchers to store all of their research data records in a secure, compliant online ...
(Date:7/29/2018)... ... 29, 2018 , ... Dr. William Plikerd, an evidence-based energy healer, today announces ... immunity and to combat inflammation and autoimmune disorders. , The preclinical research assessed ... reported:, Up to 260% increase overall immunity as seen ...
(Date:7/26/2018)... ... July 25, 2018 , ... Boston Biotech Conferences will ... 4, 2018 at The Hilton Boston Back Bay Hotel. This peer-to-peer meeting provides ... and dissect the most relevant deals in biotech. , George Golumbeski recently joined ...
Breaking Biology News(10 mins):
(Date:8/7/2018)... ... August 06, 2018 , ... Slone Partners, ... the placement of Dr. Paul Harney as President, North America at Prescient Healthcare ... and enhancing client satisfaction. He was also named to Prescient’s Board of Directors. ...
(Date:7/31/2018)... ... July 31, 2018 , ... ... years, announces the launch of their new website. The new website has been ... the site. Mahoney partnered with Proceed Innovative to build a website created for ...
(Date:7/25/2018)... ... July 25, 2018 , ... Vium, Inc. ... Digital Vivariumâ„¢ and Vium Cloud approach to accelerate preclinical drug discovery and development, ... the company announced the appointment of Jeff Caron to the newly formed role ...
(Date:7/24/2018)... ... July 24, 2018 , ... R3 Stem Cell is now offering regenerative therapies ... offered by Double Board Certified providers, with outcomes significantly improving patient quality of life. ... have done nothing to help repair and regenerate damaged lung tissues. Stem cell ...
Breaking Biology Technology:
Cached News: