Navigation Links
NOAA scientists: spilled oil unexpectedly lethal to fish embryos in shallow, sunlit waters
Date:12/27/2011

In a study published today in the scientific journal PNAS, NOAA scientists and their collaborators reported Pacific herring embryos in shallow waters died in unexpectedly high numbers following an oil spill in San Francisco Bay, and suggest an interaction between sunlight and the chemicals in oil might be responsible.

In November 2007, the container ship Cosco Busan released 54,000 gallons of bunker fuel, a combination of diesel and residual fuel oil, into the San Francisco Bay. The accident contaminated the shoreline near the spawning habitats of the largest population of Pacific herring on the West Coast.

In this study, scientists found that herring embryos placed in cages in relatively deep water at oiled sites developed subtle but important heart defects consistent with findings in previous studies. In contrast, almost all the embryos that naturally spawned in nearby shallower waters in the same time period died. When scientists sampled naturally-spawned embryos from the same sites two years later, mortality rates in both shallower and deeper waters had returned to pre-spill levels.

"Based on what we know about the effects of crude oil on early life stages in fish, we expected to find live embryos with abnormal heart function, so it was a surprise to find so many embryos in the shallow waters literally falling apart," said Dr. John Incardona, a toxicologist with NOAA's Northwest Fisheries Science Center and lead author of the study. "The study has given us a new perspective on oil threats in sunlit habitats, particularly for translucent animals such as herring embryos. The chemical composition of residual oils can vary widely, so the question remains whether we would see the same thing with other bunker fuels from around the world."

Two decades of toxicity research since the 1989 Exxon Valdez oil spill has shown that fish embryos and larvae are particularly vulnerable to spilled oil. Most catastrophic spills, such as the Exxon Valdez, involve large volumes of crude oil. However, residual oils used in bunker fuels are the leftovers of crude oil refining, and are not as well studied as crude oils. Bunker fuel is used in maritime shipping worldwide, and accidental bunker spills are more and more common and widespread than large crude oil spills.


'/>"/>

Contact: Vicky Krikelas
Vicky.Krikelas@noaa.gov
206-554-1724
NOAA National Marine Fisheries Service
Source:Eurekalert

Related medicine news :

1. Scientists: Soccer improves health, fitness and social abilities
2. Unexpectedly small effects of mutations in bacteria bring new perspectives
3. Researchers discover Achilles heel in lethal form of prostate cancer
4. Stanford discovery may eliminate potentially lethal side effect of stem cell therapy
5. Antivenom against lethal snake gives hope to developing countries
6. German E. Coli Strain Especially Lethal, Studies Find
7. Scientists identify key component in lethal lung cancer complication
8. Physician participation in lethal injection executions should not be banned, argue 2 ethicists
9. Coffee may reduce risk of lethal prostate cancer in men
10. CSHL team perfects non-lethal way of switching off essential genes in mice
11. Will Loss of Lethal Injection Drug Harm Surgical Patients?
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... KS (PRWEB) , ... June 27, 2016 , ... TopConsumerReviews.com ... retailers of Eyeglasses . , Millions of individuals in the United States and ... have become a way to both correct vision and make a fashion statement. Even ...
(Date:6/26/2016)... ... ... On June 10-11, 2016, A Forever Recovery, a holistic treatment center for ... Table in Battle Creek, MI, where the rehabilitation facility is located. This annual celebration ... world’s leading providers of cereal and other breakfast foods. Its residents often refer to ...
(Date:6/26/2016)... ... , ... PawPaws brand pet supplements owned by Whole Health Supply ... health of felines. The formula is all-natural and is made from Chinese herbs that ... Cat Kidney Support Supplement Soft Chews are Astragalus Root Extract and Rehmannia Root ...
(Date:6/26/2016)... (PRWEB) , ... June 26, 2016 , ... ... fertility once they have been diagnosed with endometriosis. These women need a treatment ... also require a comprehensive approach that can help for preservation of fertility and ...
(Date:6/25/2016)... ... June 25, 2016 , ... Austin residents seeking Mohs surgery services, can now ... and to Dr. Russell Peckham for medical and surgical dermatology. , Dr. Dorsey brings ... The selective fellowship in Mohs Micrographic Surgery completed by Dr. Dorsey was under the ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... 23, 2016  MedSource announced today that it ... software solution of choice.  This latest decision demonstrates ... to their clients by offering a state-of-the-art electronic ... establishes nowEDC as the EDC platform of choice ... clients.  "nowEDC has long been a preferred EDC ...
(Date:6/23/2016)... -- In a startling report released today, National Safety Council ... comprehensive, proven plan to eliminate prescription opioid overdoses. Prescription ... are tackling the worst drug crisis in recorded U.S. history, assigned ... Kentucky , New Mexico , ... 28 failing states, three – Michigan , ...
(Date:6/23/2016)... Research and Markets has announced the addition of ... their offering. The current ... environment for MedImmune to enter. The US ageing population creates ... drive considerable growth for effective anti-influenza medications. The introduction of ... but development is still in its infancy. ...
Breaking Medicine Technology: