July 13, 2015 — MASSACHUSETTS — The South Shore’s first shark-detecting buoy was set afloat off Duxbury Wednesday, with three more placed along the Plymouth coastline Friday.

The buoys, attached to acoustic receivers, will track any tagged sharks swimming within a 200-yard radius.

“We’re trying to get a sense of local movements of white sharks and their behaviors for the purpose of public safety,” said Gregory Skomal, a senior biologist with the state Division of Marine Fisheries.

The receivers on the buoys detect sounds emitted by the transmitters on tagged sharks, Skomal said. The receivers will record the date and time when the shark swims by, he said, and scientists from the Division of Marine Fisheries will download information from the receiver every couple of weeks.

Tracking buoys have floated off Cape Cod since 2010, monitoring shark movements in Chatham, Orleans, and Truro, Skomal said, and additional receivers have been added each year.

Plymouth harbormaster Chad Hunter said Friday that officials are seeking information about the sharks’ behavior that might help keep residents safe.

Read the full story at The Boston Globe