Navigation Links
Cleaning up oil spills can kill more fish than spills themselves, say Queen's biologists
Date:3/16/2009

Kingston, ON A new Queen's University study shows that detergents used to clean up spills of diesel oil actually increase its toxicity to fish, making it more harmful.

"The detergents may be the best way to treat spills in the long term because the dispersed oil is diluted and degraded," says Biology professor Peter Hodson. "But in the short term, they increase the bioavailability and toxicity of the fuel to rainbow trout by 100-fold."

The detergents are oil dispersants that decrease the surface tension between oil and water, allowing floating oil to mix with water as tiny droplets. Dr. Hodson and his team found that dispersion reduces the potential impacts of oil on surface-dwelling animals, While this should enhance biodegradation, it also creates a larger reservoir of oil in the water column.

This increases the transfer of hydrocarbons from oil to water, Dr. Hodson explains. The hydrocarbons pass easily from water into tissues and are deadly to fish in the early stages of life. "This could seriously impair the health of fish populations, resulting in long-term reductions in economic returns to fisheries," he says.

The study is published in the journal, Environmental Toxicology and Chemistry.

The researchers also determined that even though chemical dispersants are not typically used in freshwater, turbulent rivers can disperse spilled diesel and create similar negative effects.

"It doesn't matter if the oil is being dispersed by chemicals or by the current," says Dr. Hodson. "Now that we know how deadly dispersed oil is, it is important to assess the risks of diesel spills to fish and fisheries in terms of the spill location, and the timing relative to fish spawning and development."


'/>"/>

Contact: Nancy Dorrance
nancy.dorrance@queensu.ca
613-533-2869
Queen's University
Source:Eurekalert

Page: 1

Related biology news :

1. Cleaning the atmosphere of carbon: African forests out of balance
2. Cleaning heavily polluted water at a fraction of the cost
3. University-industry team developing coal cleaning technology in India
4. First wind turbines on Galapagos Islands will halve diesel imports, reduce risk of future oil spills
5. For honey bee queens, multiple mating makes a difference
6. Biologists solve mystery of black wolves
7. Biologists discover link between CGG repeats in DNA and neurological disorders
8. Biologists learn structure, mechanism of powerful molecular motor in virus
9. Queens University biologists find new environmental threat in North American lakes
10. Biologists discover gene behind plant sex mystery
11. Caltech geobiologists discover unique magnetic death star fossil
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/23/2017)...  The general public,s help is being enlisted in what,s thought to ... and on the human body –and are believed to affect health.  ... The Microbiome Immunity Project is the largest ... the gut. The project's goal is to help advance scientific knowledge of ... ...
(Date:7/20/2017)... Delta (NYSE: DAL ) customers now can use fingerprints instead ... National Airport (DCA). ... Delta launches biometrics to board aircraft at Reagan Washington National Airport ... Delta,s biometric boarding pass experience that launched in ... the boarding process to allow eligible Delta SkyMiles Members who are enrolled ...
(Date:6/23/2017)... and ITHACA, N.Y. , ... and Cornell University, a leader in dairy research, today ... bioinformatics designed to help reduce the chances that the ... the onset of this dairy project, Cornell University has ... for Sequencing the Food Supply Chain, a food safety ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... ... October 12, 2017 , ... BioMedGPS announces expanded coverage ... its newest module, US Hemostats & Sealants. , SmartTRAK’s US Market for Hemostats ... sealants, synthetic sealants and biologic sealants used in surgical applications. BioMedGPS estimates the ...
(Date:10/11/2017)... ... ... eye wash is a basic first aid supply for any work environment, but most personal ... rinse first if a dangerous substance enters both eyes? It’s one less decision, and likely ... dual eye piece. , “Whether its dirt and debris, or an acid or alkali, getting ...
(Date:10/11/2017)... ... October 11, 2017 , ... Disappearing forests and increased ... of over 5.5 million people each year. Especially those living in larger cities are ... - based in one of the most pollution-affected countries globally - decided to take ...
(Date:10/10/2017)... , ... October 10, 2017 , ... ... Center’s FirstHand program has won a US2020 STEM Mentoring Award. Representatives of the ... for Excellence in Volunteer Experience from US2020. , US2020’s mission is to change ...
Breaking Biology Technology: