* Tests performed on seven dolphins, 106 sea turtles
* None showed visible signs of oil contamination
* All being treated as suspected spill casualties
By Steve Gorman
PORT FOURCHON, La., May 13 Scientists are
examining samples from seven dolphins and over 100 sea turtles
found dead along the U.S. Gulf Coast in the past two weeks to
see if they were victims of the giant oil spill in the region,
wildlife officials said on Thursday.
All of the deaths are being investigated as suspected
casualties of the oil gushing unchecked since April 20 from a
ruptured wellhead on the floor of the Gulf off Louisiana
because of their proximity in time and space to the spill.
But none of the dolphins or turtles examined showed any
obvious visible signs of oil contamination. Necropsies -- the
animal equivalent of autopsies -- are being performed and
analyzed to determine if oil ingestion caused the deaths.
The investigations of most of the animals are still
pending, and none has yet confirmed oil as a cause of death.
The information about dolphin and sea turtle mortality and
the investigation into the cause of those deaths came from two
sources close to the Gulf's wildlife spill-response teams who
spoke to Reuters on condition of anonymity.
The seven dolphins and 106 sea turtles were found along the
coast of Louisiana, Mississippi and Alabama over the past two
weeks, the sources said.
One heavily decayed dolphin carcass was seen on the beach
at the very tip of Port Fourchon in southeastern Louisiana.
Gooey, rust-colored globs believed to be oil debris began
washing ashore on that beach on Wednesday night.
A few deaths were ruled out as spill-related because they
occurred before the spill or were animals that were known to
have been sick or injured beforehand, the sources said.
TOO SOON FOR CONCLUSIONS
Wildlife officials have expressed particular concern for
the well-being of sea turtles in the Gulf following the spill
because all five species that inhabit the region are
endangered, and it is their spring nesting season.
But experts say large numbers of sea turtle deaths this
time of year is not uncommon.
On a conference call with reporters on Wednesday, officials
of the U.S. National Oceanic and Atmospheric Administration
said it was still too early to draw firm conclusions from the
latest wildlife casualties in the Gulf.
"We don't have definitive information for most of the ...
(animals) that have been found," said Jane Lubchenco,
Undersecretary of Commerce for Oceans and Atmosphere.
Impacts on bird life has been relatively light to date,
according to wildlife specialists.
"So far, relatively few birds have been brought in with oil
on their feathers," said David Ringer of the National Audubon
Society, who put the number at between 12 and 20.
"The birds that have been brought in are birds that catch
fish in open waters" and would have come in contact with oil
there, he said.
(Editing by Sandra Maler)