YubaNet.com
Monday, May 30 2016

            We Deliver News to the Sierra
News Fire News spacer Latest News spacer Regional News spacer California News spacer USA News spacer World News spacer Op-Ed spacer Enviro News spacer Sci Tech News spacer Life spacer Odd News spacer Cartoons spacer
Features The Calendar features features Weather features Sierra NightSky features features features Road Conditions features Home spacer
US
 

Gulf of Mexico Deepwater Horizon Spill Effects on Fish Revealed


    Google+    

By: National Science Foundation (NSF)

fish_gulf_oil2_h.jpg
Louisiana's Grand Terre Island marshes contaminated with oil; here, with a minnow trap. Credit: Andrew Whitehead
Sept. 26, 2011 - Despite low concentrations of oil constituents in Gulf of Mexico waters from the Deepwater Horizon spill, fish were dramatically affected by toxic components of the oil.

So found a team led by scientists Fernando Galvez and Andrew Whitehead of Louisiana State University (LSU).

The researchers published their results this week in the journal Proceedings of the National Academy of Sciences (PNAS).

Galvez, Whitehead and colleagues undertook a combined field and laboratory study. It showed widespread effects of the Deepwater Horizon oil spill on fish in Louisiana marshes.

Gene expression in tissues of the fish studied--in this case killifish--was predictive of oil spill responses such as developmental abnormalities and death, say the biologists.

"It also indicated impairment of fish reproduction," says Whitehead.

The study was funded by a National Science Foundation (NSF) rapid response grant.

"Joining remote-sensing of the spill with gene expression data from wild-caught killifish, these scientists have captured the effects of low-level exposure to pollutants on the long-term health of fish," says George Gilchrist, acting deputy director of NSF's Division of Environmental Biology, which funded the research.

"It's a landmark study in applying genomic technology to wild animal populations under stress."

Fish gill tissues, important for maintaining critical fish body functions, appeared damaged and had altered protein expression.

These effects persisted long after visible oil disappeared from a marsh's surface.

Developing fish embryos exposed to field-collected waters had similar cellular responses, Whitehead says.

"This is of concern because early life-stages of many organisms are particularly sensitive to the toxic effects of oil," says Whitehead, "and because marsh contamination occurred during the spawning season of many species."

A major message of the previous Exxon Valdez oil spill in Alaska, he says, "is that sub-lethal biological effects, especially those linked with reproduction, are most predictive of the long-term effects of oil in many fish species, such as herring and salmon."

The Gulf of Mexico study shows similar early signals of sub-lethal effects after the Deepwater Horizon oil spill.

The scientists are following up with research examining more direct effects of oil exposure on fish reproduction, development and growth.

Other co-authors of the paper are Benjamin Dubansky, Charlotte Bodinier, Scott Miles, Chet Pilley, Vandana Raghunathan, Jennifer Roach, and Nan Walker of LSU; Tzintzuri Garcia and Ronald Walter of Texas State University and Charles Rice of Clemson University.

The research was also funded by the Gulf of Mexico Research Initiative.

 

Help us bring you more news. Be a real reader: Support YubaNet

By submitting a comment you consent to our rules. You must use your real first and last name, not a nickname or alias. A comment here is just like a letter to the editor or a post on Facebook. Thank you.

 

Latest Headlines

US

Hundreds of Writers Including Stephen King and Amy Tan Pen Open Letter Against Donald Trump

Rep. Gutiérrez: Hanen Wants To Dox 100,000 Immigrants For “Every Two-Bit Vigilante And Twitter Troll To Read”

Zika Crisis Exposes Long-Standing Neglect of Women’s Reproductive Health Needs in Latin America and the U.S.

US Govt to “Exclude” 3/4 of Drone Strikes from Civilian Casualty Numbers

Report details 166 near misses for nuclear disasters across the United States

Lawsuit Tackles National Bison Range Giveaway Legislation

Some Northwest Elected Officials, Candidates Embrace Extremist ‘Patriot’ Agenda on Federal Lands -- and Many Fail

EFF Asks Court to Reverse Chelsea Manning’s Conviction for Violating Federal Anti-Hacking Law

CEOs Paid 335 Times Average Rank-and-File Worker; Outsourcing Results in Even Higher Inequality

At NRA Annual Meeting in Louisville, Gun Industry and NRA Work Hand-in-Glove to Target Children as Young as Grade School Age


More

 

 

 

 

NEWS . Fire News . Latest . Regional . California . USA . World . Op-Ed . Enviro . Sci/Tech . Life . Odd News . Cartoons
FEATURES . The Calendar .Weather . Sierra NightSky. Road Conditions
YubaNet.com . Advertising. About Us . Support YubaNet . Contact Us . Terms of Use . Privacy

YubaNet.com © 1999-2016
Nevada City, California (530) 478-9600