There is no sea creature whose name inspires terror – rightly or wrongly – as much as the great white shark.
Once upon a time, the fishing town of Gansbaai on the South African coast was something of a mecca for shark-spotters – so heavily populated with the predators that nearby Dyer Island is considered the. Over the last few years, however, the sharks' presence has been diminishing.
. The wounds on these sharks are distinctive, and have been traced to the same pair of orcas. It's likely, scientists believe, that the pair are responsible for many more great white deaths that haven't washed ashore.We know from other studies that the presence of orcas can drive great white sharks away pretty adroitly. One in 2020 found that, without fail, from preferred hunting waters off the coast of San Francisco if an orca makes an appearance in the region.
"Initially, following an orca attack in Gansbaai, individual great white sharks did not appear for weeks or months,""What we seem to be witnessing though is a large-scale avoidance strategy, mirroring what we see used by wild dogs in the Serengeti in Tanzania, in response to increased lion presence. The more the orcas frequent these sites, the longer the great white sharks stay away.
In the absence of great white sharks, copper sharks are moving in to fill the vacant ecological niche. These sharks are preyed upon by great whites; with no great whites around, the orcas are hunting the coppers instead. And, notably, they're doing so with the skill of predators who have had experience in hunting large sharks, the researchers said.
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