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Great white sharks may munch on a wider array of sea creatures throughout their lives than previously thought, according to a new study published Friday in the journal PLoS ONE. (via LA Times)
It’s long been thought that off California and Mexico, juvenile white sharks feed on fish, subadults begin shifting to marine mammals (mostly pinnipeds), while adults feed nearly exclusively on pinnipeds. These researchers measured the stable carbon and nitrogen isotope composition of vertebral growth bands to create lifetime records for 15 individuals from California, and found that some sharks start feeding on marine mammals very early, while others never do make the shift over to marine mammals.
Journal article here…