Scientists try to determine how they died
San Francisco- In the past 9 days, four gray whales were found dead on the beach of San Francisco Bay. Experts say one of them was hit by a boat. Scientists are trying to determine how the other three people died.
Dr. Pag Dugenan, Director of Pathology at the Marine Mammal Center, said: “The response to the deaths of four gray whales in just one week is shocking because it really reflects the current challenges facing the species. .”
On March 3, the carcass of a 41-foot (12.5 m) adult gray whale was found in the Crissy Field area of San Francisco. Last Saturday, a second adult female whale was found on Moss Beach in San Mateo County. On Wednesday, one-third of the people were found floating near the Berkeley Pier and the next day near Muri Beach in Marin County.
Whales migrate 10,000 miles (16,000 kilometers) in winter in Mexican waters until winter, where they mate and give birth to babies on the coast of Baja California, California. They then returned north and left the California coast in spring and summer to feed on anchovies, sardines and krill, and then continued to migrate north to the cold, food-rich waters of the Arctic.
In 2019, at least 13 whales were found dead near the coast of the San Francisco Bay area. Scientists say they are worried that this will happen because these animals are starving and cannot complete their annual migration from Mexico to Alaska. Since the National Oceanic and Atmospheric Administration (NOAA) announced an “unusual killing event” in 2019, biologists have observed that gray whales are in poor physical condition during their annual migration.
According to the research team of the center, the most common causes of whale deaths in recent years are malnutrition, entanglement in fishing nets and injuries caused by ship strikes.