Hundreds of dolphins have died along Gulf Coast since February, scientists say

At least 279 animals have been stranded, triple the usual figure, and 98% have died, prompting investigation

At least 279 dolphins have become stranded across much of the US Gulf coast since the start of February, triple the usual number, and about 98% of them have died, scientists from the National Oceanic and Atmospheric Administration (Noaa) said.

Scientists will investigate whether lingering effects from the 2010 BP oil spill and more immediate effects from low salinity because of freshwater flowing from high rivers and a Louisiana spillway contributed to the deaths, said Teri Rowles, coordinator for Noaa fisheries' marine mammal health and stranding response program.