Whale 'Supergroups' Show Numbers Rebounding from Hunting, But Iran War Holds Dangers

A remarkable sighting of nearly 300 humpback whales gathered off South Africa's west coast offers a powerful symbol of conservation success. Chris and Monique Fallows, a couple accustomed to observing marine life, described the event as "extraordinary," witnessing what they called a "Manhattan skyline" of whale breath plumes. They meticulously documented 299 individuals, using tail fluke photographs, a method common among scientists for identifying whales.

This "supergroup" phenomenon is seen by scientists as strong evidence of whale populations rebounding in the southern hemisphere. Decades after the 1986 international ban on commercial whaling, humpback numbers have surged from a low of under 10,000 to more than 100,000. Alex Vogel, Africa coordinator for Happywhale, an organization that maintains a global whale database, noted that the Fallows' sighting appears to be the largest group of humpback whales ever recorded.

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It was extraordinary. Quite quickly we realized that there must be several hundred whales coming together in one particular area.

Els Vermeulen, chief scientist at the University of Pretoria’s Whale Unit, classifies the moratorium on whaling as one of the most successful marine conservation efforts. She explained that humpbacks, typically solitary or in small pods, gather in "supergroups" in food-rich areas to feed on krill or small fish. These gatherings, which began to be observed more frequently around 2012, are likely a direct result of their recovery from intense whaling.

While the recovery of humpback whales is a significant conservation victory, the article notes that threats persist. The ongoing Iran war, for example, presents potential dangers to these marine mammals. Despite this, the increasing sightings of humpback supergroups across the Southern Hemisphere underscore a positive trend in marine biodiversity, largely attributed to global efforts to protect whale populations.

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In general, the moratorium on whaling can be classified as one of the strongest conservation success stories in the marine environment.