WASHINGTON : An examination of the zinc content of teeth from sharks both living and extinct is providing clues about the demise of the largest-known shark, indicating the mighty megalodon may have been out-competed by the great white shark in ancient seas.
This competition for food resources featured two animals now lodged in the popular imagination - with the great white featured in the blockbuster 1975 film"Jaws" and its sequels and the megalodon starring in the popular 2018 movie"The Meg." "The megalodon co-existed with the great white shark during the time frame called the early Pliocene, and our zinc data suggest that they seem to have indeed occupied the same position in the food chain," said paleobiologist Kenshu Shimada of DePaul University in Chicago, a co-author of the study published on Tuesday in the journal Nature Communications https://www.nature.com/articles/s41467-022-30528-9.
Today's great white sharks hunt sea turtles as well as marine mammals including seals, sea lions, porpoises, dolphins and small whales.
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