May 26, 2017 — We’re getting close to that time of year, when the great white sharks make their annual visit to the waters of Cape Cod. Cape Cod is the only known aggregating site for white sharks in the North Atlantic.
According to the latest study by the Massachusetts Division of Marine Fisheries, the number of great white sharks vacationing there appears to be rising. That’s a public safety issue for towns, according to the state’s top shark expert.
Guest
Gregory Skomal, program manager and senior marine fisheries biologist with the Massachusetts Division of Marine Fisheries. His research group tweets @a_whiteshark.
Interview Highlights
On their survey of the numbers of great white sharks
“We are right in the middle of a 5-year population study … what I can tell you … is how many individuals we’ve tabulated year for the last couple of years. In 2016 for example, we identified 147 individual white sharks along the Eastern shoreline of Cape Cod. The year prior to that, it was 141 and the year prior to that in 2014, it was about 80. So we’re seeing that subtle increase from year to year. And as tempted as I am to say that it’s actually an increase in the population size, it’s more likely a shift in the distribution of sharks in response to the growing seal population.”
On how the seals are attracting sharks
“Most people don’t realize the interesting history of the seal populations on the Northeastern coast of the U.S. They had been all but drive to extinction a couple of hundred years ago. And now, with protection that was put in place in the early 1970s, we’ve seen the slow growth in the population that has now resulted in literally tens of thousands of seals along our coastline. And that has drawn the attention of one of their predators, the white shark.”