The record cold snap that froze the northeast Thanksgiving weekend had deadly consequences for sea turtles still swimming in Cape Cod Bay. More than 80 frozen sea turtles were brought into the Massachusetts Audubon Society’s Wellfleet Bay Wildlife Sanctuary the day after Thanksgiving, and most did not survive, ABC News reported.
A full 173 turtles have died off of the Massachusetts coast since Wednesday, Mass Audubon Director Bob Prescott told CNN. A total of 227 near-frozen turtles were brought to the sanctuary over the holiday, but only 54 recovered. In total, more than 400 turtles have washed up on Massachusetts beaches since Oct. 22, more than average for the winter stranding season, the Cape Cod Times reported.
“We are at well over 400 cold-stunned turtles (for the year)—82 today, the vast majority of them frozen solid,” Wellfleet Bay Wildlife Sanctuary communications coordinator Jenette Kerr told the Cape Cod Times Thursday. “[Wednesday] we had 87, the vast majority of them alive. Drastic change in the weather overnight.”
Indeed, the water in Cape Cod Bay fell from lows in the high 30s Wednesday to lows of around 19 degrees Fahrenheit Thursday, ABC News reported.
The sanctuary has posted photos of its rescue efforts on its Facebook page:
Prescott blamed climate change for the deaths.
“The Gulf of Maine prior to 2010 was too cold for sea turtles to come into,” he told CNN.
California Academy of Sciences sea turtle biologist Wallace Nichols agreed.
“Sea turtles are moving further north along our coast, or south to the southern hemisphere, as waters are warming and they are expanding their ranges,” Nichols told NBC. “So when we get these quick swings from warm to cooler, the turtles that haven’t made it south definitely get into trouble.”
Changing climate and the geography of Cape Cod Bay form an especially lethal trap.
“The problem here is that they can’t get out of Cape Cod Bay in time,” Prescott told NBC. “The shape of the bay just confuses them.”
When sea turtles are stuck in rapidly cooling waters, they can fall victim to a potentially lethal condition called “cold stunning,” as the National Oceanic and Atmospheric Administration (NOAA) explains:
“Sea turtle[s] are cold-blooded reptiles that depend on the temperature of their surroundings to maintain their body temperature. Sea turtles can normally control their body temperatures by moving between areas of water with different temperatures or basking in the sun at the water’s surface or on the beach. However, when temperatures rapidly decline and sea turtles are cut off from moving to warmer waters, they can suffer from a form of hypothermia we call cold stunning.”
NOAA works with partners to rescue cold stunned turtles along the Massachusetts coast. The number of turtles washing up between October and Christmas has averaged 600 in recent years.
#HappyThanksgiving We are thankful for @NatlAquarium @OrlandoSea @MarineLifeCtr @NCAquariumatPKS @NCAquarium_RI @NCAquariumFF @PghZoo @VAAquarium @LoggerheadMC @brigantineseals#SeaTurtleRecovery who are opening their doors to cold-stunned #seaturtles https://t.co/7CCRq4yQ2l pic.twitter.com/PDRApIjZFz
— NOAA Fisheries NE/MA (@NOAAFish_GARFO) November 22, 2018
The “cold stunned” sea turtles that washed ashore this week were tropical. The majority were Kemp’s ridley turtles, the most endangered species of sea turtle in the world. Green turtles and loggerheads have also numbered among the victims, the Cape Cod Times reported.
While it’s been a hard week for sea turtles and their allies, there are still some bright spots. The Wellfleet Bay Wildlife Sanctuary shared a video Sunday of a Kemp’s ridley turtle showing signs of life.