Scientists search for answers as baby whales wash up dead in Argentina

PENINSULA VALDES, Argentina (AP) — Investigators in Argentina are trying to solve the mystery of baby whales washing up dead in unusually high numbers along the country’s Patagonian coast.Scores of the calf carcasses have been washing ashore around Peninsula Valdes, a major breeding ground for southern right whales in Argentina’s Chubut province.Hunted to the brink of extinction in the 19th and 20th centuries, the whales now gather in the peninsula’s sheltered waters to give birth and nurse their young.“We’re looking into the whale calf deaths based on 23 years of monitoring that we have of this same population.

That’s what allows us to say that this is an unusual event,” said Marcela Uhart, a veterinarian with the One Health Institute at the University of California, Davis, who is leading the investigation as head of the Southern Right Whale Health Monitoring Program.The leading hypothesis is that the whale calves are suffering infections from marine bacteria that can enter their bodies through injuries inflicted by kelp gulls, Uhart said.For decades, the seabirds have pecked at whales surfacing to breathe, gorging on their skin and blubber.Adults learn to surface with only their heads exposed, keeping their backs underwater and out of reach of the gulls.

Calves can’t do that maneuver, leaving them vulnerable to attacks.The carcasses have been washing ashore around the gulf city of Puerto Madryn, including near the central waterfront where they alarm residents and tourists.Residents have reported hundreds of them, but researchers declined to give a death toll, saying that would become clear after the season ends around late November.Uhart and a team of biologists, veterinarians and park rangers have been searching the area for the dead calves from shore and with boats, planes and drones.The work is gruesome: They photograph and examine the bodies, racing against decomposition to collect skin and organ samples for testing at a veterinary school ...