By Madeleine Coorey
Barnacles on a wing part that washed up on a remote Indian Ocean island could yield new clues to the fate of Malaysia Airlines flight MH370 if it's from the plane, experts say.
The hunt for the Boeing 777, which disappeared on March 8 last year en route from Kuala Lumpur to Beijing with 239 people aboard, has focused on the southern Indian Ocean off Australia.
No trace of it has so far been found.
Last week a two-metre long wing component called a flaperon, with barnacles encrusted on its surface, was found on Reunion Island. The part has been confirmed as coming from a Boeing 777.
Technical experts, including from US aerospace giant Boeing, are due to begin from Wednesday (local time) examining the debris in France to determine conclusively whether it belonged to the flight.
Scientists said the main information the barnacles would provide was how long the piece had been in the water.
"They might be able to age the barnacles and if the barnacles are older than the crash date that would suggest it was not the wreckage," said Melanie Bishop, associate professor in biological sciences at Sydney's Macquarie University.
Depending on the species of barnacles found on the flaperon, which appears relatively clean, investigators might also be able to estimate where the piece has been, scientists said.
Geology expert Hans-Georg Herbig said if the barnacles were found to be from the Lepas family, "we can then say with certainty that the accident took place in cold maritime areas to the southwest of Australia".
"If it has cold water barnacles on it that might tell them it went down further south than they think. Or if it's got only tropical barnacles, that might tell them it went down further north," added Shane Ahyong, a crustacean specialist from the Australian Museum.
But he said some oceanic barnacles were so widespread that pinpointing their precise origin would likely be impossible given the lack of genetic and population information about them.
"There are barnacles that occur in the east Indian Ocean, there are barnacles that occur in the west Indian Ocean and that can help narrow the range," Ahyong said.
"The key thing they should be able to tell using these barnacles is how long the wreckage has been in the water and then they can see if that matches with the other evidence in terms of the date in which it went down, the time they think it has been floating."