To truly understand the life cycles and movements of Pismo clams and unravel the mystery of why they’re making a surprise comeback, students from his lab are doing monthly clam surveys and also fes…
PISMO BEACH — Once a cherished local fishery, Pismo clams went missing from their namesake beach for decades.
During the Pismo clams’ glory days in the 1950s, marine biologists had come up with estimates of the growth rates and lifespans of the clams. But Ruttenberg discovered that nobody knew if the estimates still held true for today’s Pismo clam population. He also learned that no one had studied how the clams move around throughout their lifetimes.
“It’s definitely like a science treasure hunt,” said Marissa Bills, a graduate student in marine biology who currently leads the Pismo Clam Project in Ruttenberg’s lab. “We know that it’s working, which is very exciting for us.” So it may be easy to forget that overfishing nearly drove Pismo clams away from the area. No one has recorded a clam big enough to legally harvest — 4.5 inches or larger in diameter — at Pismo Beach for almost three decades.
No one knows exactly how many clams now call Pismo Beach home, but judging by the number confiscated from poachers of late, it could be in the hundreds of thousands or even millions. Bills is currently crunching the numbers to develop an informed estimate.Poaching has always been a serious problem in Pismo Beach, but the pandemic made it much worse when cooped-up Californians flocked to the town and found it studded with tasty-looking clams.
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