Jaws is scared of Free Willy.
A new study published in Nature this week showed that orcas have arrived in a region off South Farallon Island off the coast of San Francisco, the great white, in the sharks Brightened up – and have not returned for months.
No beast of prey is more formidable than the Great White Shark, but even they seem to stay away from Orcas, highly intelligent pack hunters who have done so. In rare cases, it has been observed that it attacked large whites ̵
"Once we had 17 sharks that we tracked on the island at the same time as a group of orcas showed up," said Salvador Jorgensen of Monterey Bay Aquarium, who led the study involving Stanford University and Point Blue Conservation Science were.
"We were able to use the data to see all sharks leaving the side of the island where the orcas have arrived," he said. Within a few hours, Vacat had completed the island.
The results are the result of 27 years of research, but Jorgensen guessed that the two predators had made this dance for a while.
Between 2006 and 2013, scientists tagged 165 large white sharks and lured them into boats with sea lions made from everyday carpets before being provided with beacons that sent codes to sensors throughout their territory, allowing scientists to track their movements Point Blue Conservation Science investigated orca activity in southeastern South Africa. Farallon Island and helped the team understand the interaction between the orcas and sharks.
"The fact that this predator has one of the key cards is ironic and wrinkled," Jorgensen said of the sharks not always that a Great White Shark has opted for an escape, but this could be a key aspect of its behavior; that could have led to the success of the last million years. "
The true winner of this ecological predatory dance, however, could be the spoils. Great white sharks gather around southeast Farallon Island when the number of young seal seals is abundant and most likely to overlap with orcas in late autumn or early winter. Although orcas run only briefly, large white sharks clear out for a longer period of time and leave the seal population alone.