Australian scientists have recorded for the first time how more than 30 humpback whales hunted this part of the world Summon their prey blow. Not only is the population size amazing, scientists also know that this hunting method mainly comes from whales near South Africa.
The photos were taken by a citizen scientist on the coast of New South Wales in September last year.They have now been analyzed and the results of the study have been published in the scientific journal Aquatic conservation.
These are drone images:
These images provide new insights into how humpback whales find food. Their idea is to migrate from the cold regions near Antarctica to the warmer waters around Australia every year, give birth there, and then take the calves back to the cold water because there is more food. Suppose they do not eat during the journey.
Madik Leopold of Wageningen University said: “But now, it is clear from the images that if they encounter krill on the way, they will prey on it.”
According to Leopold, these images are special, but it is no coincidence that so many humpback whales have been found at the same time. “Usually whales migrate alone or with their cubs. But if you find a lot of prey along the way, you can expect to see many whales.”
Australian researchers write that images of “supergroups” may indicate that the population is improving. Over the years, marine mammals have been hunted in large numbers.
In the “bubble net technology”, whales swim around their prey and blow bubbles, allowing small marine creatures to swim to the surface in a compact sphere. Then they are easily caught by whales. How Australian humpback whales learned this technique remains a mystery to scientists.
According to Leopold, whales are known for quickly learning from each other when they meet. “New hunting methods are spreading in the crowd like wildfires. Because of their speed, scientists speculate whether whales still use some form of language to communicate,” he said. It has not been investigated whether the whales in South Africa had contact with humpback whales photographed in Australia.