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:5/27/2016)... , ... May 27, 2016 , ... ... this installment is bolstered by inspiring human-interest stories, courtesy of awareness-driven celebrities and ... the industry, from leading advocates, associations and industry leaders such as Bioness. ...
(Date:5/27/2016)... ... 2016 , ... Aimed at nurses and employees in the health care world, ... in the nursing and health care industry. It also provides insight to the developing ... , As the nursing industry is coming out of one of the biggest ...
(Date:5/26/2016)... , ... May 26, 2016 , ... There are many ... Dog and Sausage Council (NHDSC) suggests that Americans prefer their dogs straight off the ... percent say grilling is their favorite way to cook a hot dog, far outpacing ...
(Date:5/26/2016)... ... May 26, 2016 , ... Georgia ... to its specialty academic programs. , Answering to the increasing demand for curricular ... in health law, and environmental and land use law. ,  , “The demand ...
(Date:5/26/2016)... ... May 26, 2016 , ... ... a significant negative impact on long-term patient survival, reports a team of UPMC ... online this week in the Journal of Thoracic and Cardiovascular Surgery, provide critical ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... 2016  Granger Diagnostics today announced immediate availability of ... infections. This test ensures discovery of ALL bacteria, ... test requires only a simple swab of the wound ... G. Bostwick , MD, Chief Medical Officer, described ... "We are excited to make available, for the ...
(Date:5/25/2016)... , May 25, 2016 ... H1 2016"market research report that provides an overview ... comparative analysis at various stages, therapeutics assessment by ... administration (RoA) and molecule type, along with latest ... also reviews key players involved in the therapeutic ...
(Date:5/24/2016)... LONDON , May 24, 2016   ... primary endpoints demonstrating non-inferiority in overall bowel cleansing and superiority ... c leansing of ... http://photos.prnewswire.com/prnh/20130829/633895-a ) , Norgine B.V. today announced ... (1 litre PEG and ascorbate bowel preparation) versus standard 2 litre ...
Breaking Medicine Technology: