Majestic Sei Whales Reappear in Argentine Waters After Nearly a Century

After decades of absence, the majestic sei whale has made a remarkable return to the coastal waters of Argentina, a sign of the slow but steady recovery of whale populations globally. This resurgence comes after a long history of overhunting that nearly drove the species to extinction.

Historical Context and Conservation Efforts

The sei whale, the third largest whale in the world, was heavily hunted during the 1920s and 1930s. This overhunting forced these blue-grey giants to abandon their ancestral waters in Argentina. However, thanks to international conservation efforts like the 1946 International Convention for the Regulation of Whaling, whale populations are beginning to rebound.

“After nearly a century of being hunted to near extinction, sei whale populations are now bouncing back and returning to their former habitats,” said Mariano Coscarella, a biologist and marine ecosystem researcher at Argentina’s CONICET scientific agency. Coscarella explained that due to the sei whale’s reproductive cycle, it has taken almost 100 years for their population to recover to noticeable levels.

Characteristics of the Sei Whale

Sei whales are impressive creatures, growing up to 64 feet (20 meters) in length and weighing up to 31 tons (28 tonnes). They are among the fastest whales, capable of swimming at speeds of 31 mph over short distances. Despite being classified as Endangered on the IUCN Red List, the global sei whale population is estimated to be around 50,000 and is trending upwards.

Global Whale Recovery

The return of sei whales to Argentina is part of a broader trend of large baleen whales reappearing in waters where they haven’t been seen for decades. For example, a recent survey in the Seychelles observed 10 groups of blue whales, the first such sighting since 1966. Similarly, a gray whale was spotted off the New England coast last year, a species extinct in the Atlantic for over 200 years.

The recovery of whale populations is also evident in other parts of the world. Blue whales are returning to Californian waters in numbers not seen since the pre-whaling era. In Antarctica, surveys have estimated the presence of around 8,000 Southern fin whales between 2018 and 2019, transforming the Southern Ocean into a Serengeti for whales once again.

Sophia H.