May 2, 2016 — Soft-shell clams are a summer tradition around Casco Bay, both for the tourists and residents who love steamers and for the clam diggers who turn long, backbreaking hours on the mud flats into cold, hard cash.

But an infestation of invasive green crabs ravaged juvenile clam stocks in the past four years, adding to ecological changes, competition for coastal access and other pressures facing the state’s second most valuable fishery. Clam landings in the Casco Bay communities of Freeport, Harpswell and Brunswick, some of the state’s leading clam producers, plummeted to historic lows in 2015, and the scarcity of soft-shell clams contributed to all-time high prices.

While some shellfish managers say clam populations have rebounded thanks to a few cold winters that killed off green crabs, harvesters are anxious that the mild winter this year could produce a resurgence of green crabs and throw the fragile industry into a tailspin.

Those fears have clam diggers and scientists stepping up efforts to defend clam beds with boxes and nets. And they are fueling calls for a sea change in the management of soft-shell clams by leasing clam beds so that clammers can better protect the resource from predators.

Some are sounding alarms that without human intervention, the resource faces total collapse.

“Unfortunately, it doesn’t look like people are just going to be able to go out and dig clams like they have without the protection element,” said Sara Randall, a Freeport researcher working with clammers in that town.

Others worry about an overreaction. Although most agree that active management and conservation efforts will be required in the future, not all believe the industry is facing a doomsday.

“We realize there is a bunch going on, but we don’t see it as the end of wild harvest,” said Darcie Couture, a marine scientist working with Harpswell clammers.

Read the full story at the Portland Press Herald