January 9, 2020 — The combination of the curving shape of Cape Cod, the region’s strong winds and currents, and the rapid cooling of the ocean in October and November make for a deadly threat to the rarest and smallest sea turtle on Earth.
That’s the problem being addressed by a series of research projects conducted by an oceanographer at the Northeast Fisheries Science Center in Woods Hole, Mass., and a doctoral student at the University of Rhode Island. The scientists used satellite-tracked oceanographic instruments called drifters to determine where Kemp’s ridley turtles that are late to return south in the fall are most likely to float ashore near death along the Cape Cod shoreline.
The critically endangered turtles lay their eggs on beaches on the Gulf Coast of Mexico in a mass nesting event called an arribada. After spending their first few years far offshore in the Sargasso Sea near Bermuda, many of the young turtles visit the waters of the Gulf of Maine to feed on crabs and other small marine creatures that live on the seafloor.
“There are little warm water bridges from the Gulf Stream that come up here, and we think some of the turtles are riding those into the area,” URI student Felicia Page said. “The problem comes when those little bridges close off and the water in Cape Cod Bay and the Gulf of Maine stay warm, which keeps the turtles here longer than they should instead of heading south in September.”