PORTLAND, Maine — August 1, 2013 — Top scientists and commercial fishermen agreed Wednesday that high lobster populations off the Maine coast could set the state’s fisheries up for catastrophe.
Researchers from as far away as California and Washington were expected to converge Wednesday on Portland for a first-of-its-kind two-day conference with academics, fishermen, government officials and lawmakers to discuss climate change and its effect on New England fisheries.
The event was hosted at the Portland Company complex by the Rockland-based Island Institute.
The takeaway message from the conference’s initial presentations: As tempting as lobster is, fishermen must diversify their catches.
In 2011 and 2012, the statewide lobster catch hit successive record highs with 105 million pounds and more than 123 million pounds, respectively. Those numbers carried some bad financial news, however, as the great supply pushed down prices and left lobstermen earning less per pound while still facing rising fuel and overhead costs.
But Bob Steneck, University of Maine marine sciences professor, pointed out an additional downside to the lobster abundance.
“The question is: Is this a socio-economic time bomb?” posed Steneck, who delivered the morning keynote address at the conference. “If this lobster population declines or even catches a cold, how long until we lose our remaining fishing communities to wealthy people who want to live on the coast?”
He said the explosion in population of the crustacean, paired with the disappearance of other species, means the Gulf of Maine is creeping toward becoming “a lucrative monoculture.”
Steneck said the North Atlantic is not historically diverse to begin with, saying the area’s “plus or minus” 100 fish species is half that found near Europe and a small fraction of the more than 2,000 species found near Papua New Guinea.
Over time, Steneck said, the Gulf of Maine has become even less diverse. He said monstrous prehistoric coastal codfish — averaging nearly 3.5 feet in length — whose bones have been found in abundance at 4,000- and 5,000-year-old Indian sites have over history become all but nonexistent in the Gulf waters, driven down by overfishing and increasing water temperatures.
Without the predatory cod and other fish like it around in great enough populations to control lobster numbers, the crustaceans have thrived, he said.
“Big fish are ecologically extinct,” Steneck said of the Gulf of Maine ecosystem. “They’re not absent … but in terms of an ecological presence, they’re extinct.”
The same warmer ocean temperatures that have helped push cod populations north, Steneck said, have provided lobster with a deeper range in which to settle their larva. Sea surface temperatures in the North Atlantic were the highest ever recorded in 2012, following years of historically rapid warming.