Saving Seafood

Scientists say ocean warming is driving lobsters northward

March 2, 2016 — It’s too early to know what Maine’s 2015 lobster landings will look like, but there’s no doubt that the number will be huge.

In 2014, the last year for which the Department of Marine Resources has figures, Maine’s fishermen landed more than 123 million pounds of lobster — the third year in a row that landings topped 120 pounds — worth a record $457 million.

While last year’s numbers aren’t in, fishermen and dealers talk about a bonanza fishery, and mild weather saw the fishery stay active into December.

In a sense, the landings are unsurprising.

According to a 2015 Atlantic States Fisheries Management Commission stock assessment, the abundance of lobsters in the Gulf of Maine and on Georges Bank showed a meteoric rise starting in 2008 and is now at an all-time high. In southern New England, though, the story is completely different.

From a peak in 1997, the southern New England stock fell swiftly to a point where, by 2004, it was well below what scientists consider the threshold of sustainability. Things leveled off briefly; then the resource began an ongoing plunge again in 2010.

According to last year’s assessment, the Gulf of Maine-Georges Bank stock is not depleted and is not being overfished. The estimated lobster population from 2011 to 2013 was 248 million lobsters, which is well above the abundance threshold — a red flag for fisheries managers — of 66 million lobsters.

In contrast, in the years 2011 to 2013, the southern New England stock was depleted at an estimated 10 million lobsters. The “red flag” abundance level is 24 million lobsters.

Read the full story at The Ellsworth American

Marine Protected Areas: are they conservation measures?

October 28, 2015 — Billionaire philanthropist Richard Branson recently composed a brief article on his website to applaud recent efforts to expand marine protected areas (MPAs) around the world and to call for widespread no-take MPAs (marine reserves) on the high seas and in the exclusive economic zones of the developed world.

Of the efforts Branson highlights as positive steps forward, he cites The Bahamas efforts to protect at least 20% of its marine environment by 2020, the recent and controversial Ross Sea MPA proposal, and recent efforts by Pacific Island nations like Palau to fully protect upwards of 80% of its waters. Branson explains that, “science suggests we need to fully protect very large areas of ocean from destructive and extractive activities, so that at least 30% of the global ocean is fully protected,” but only 3% is currently marine reserve.

Branson believes the, “combination of overfishing, pollution and warming and acidifying seas,” can be alleviated by widespread, internationally agreed upon marine reserves:

“Now is the time for a massive groundswell that reflects the realities of the 21st century. So instead of destroying life in the sea, we must regenerate and rebuild it. Marine Protected Areas across the globe are the key to making sure this happens. From small to large, from the tropics to the icy frontiers, we need protection and we need to get moving on all fronts.”

Comment by James H. Cowen, Louisiana State University

Marine Protected Areas (MPAs) have become, in the eyes of many scientists, NGOs and lay people (most recently Richard Branson, CEO and owner of the Virgin empire), a solution for the overexploitation of fish populations and other marine aquatic animals (corals, sponges, gastropods, etc.) that are contained within their boundaries (Protect Planet Ocean) Many supporters of MPAs rightly acknowledge the many threats to the ocean, including climate change, ocean acidification, pollution, land based runoff, plastics, and overfishing. Then as a solution to these problems MPAs are proposed when, in fact, they impact none of these except legally regulated fishing, especially in the developed world where most fisheries are well managed. It is also important to note that most MPAs exclude commercial fishing, while recreational fishing is permitted. A Sciences paper published in 2004 indicated that recreational fishers account for 23% of the total US landings of the most relevant species (snappers, grouper, sea basses, several species of drums, etc.). Given the likelihood that recreational fishing mortality has increased since 2004, and is higher in MPAs the relevant species groups listed above are again indicative of poor planning.

Read the full story at CFOOD

Warm Waters Prevent Cod Stocks from Recovering

November 13, 2015 — Cod use to be the backbone of New England’s fisheries, but now stocks have nearly collapsed. While the decline was due primarily to overfishing, a new report led by the Gulf of Maine Research Institute (GMRI) reveals that stocks haven’t been able to recover because of the rapidly warming waters in the Gulf of Maine.

The Gulf of Maine is warming 99% faster than anywhere else in the world, which has led to changes in major currents and climate phenomena.

Noting the continued decline of cod stocks, fisheries managers severely restricted harvest rates in 2010, but that hasn’t made much of a difference. Stocks are hovering around three to four percent of sustainable levels.

Read the full story at Marine Science Today

Big Trouble Looms For California Salmon — And For Fishermen

November 6, 2015 — The West Coast’s historic drought has strained many Californians – from farmers who’ve watched their lands dry up, to rural residents forced to drink and cook with bottled water. Now, thanks to a blazing hot summer and unusually warm water, things are looking pretty bad for salmon, too – and for the fishermen whose livelihoods depend on them.

Preliminary counts of juvenile winter-run Chinook are at extreme low levels. These are salmon that are born during the summer in California’s Sacramento River and begin to swim downstream in the fall.

Unusually warm water in recent months has caused high mortality for the young salmon, which are very temperature sensitive in their early life stages. Most years, about 25 percent of the eggs laid and fertilized by spawning winter-run fish survive. This summer and fall, the survival rate may be as low as 5 percent, according to Jim Smith, project leader with the U.S. Fish and Wildlife Service’s Red Bluff office.

“That’s not good,” Smith tells The Salt.

Worse, it’s the second year in a row this has happened. Most Chinook salmon live on a three-year life cycle, which means one more year like the last two could essentially wipe out the winter run. To protect them, fishing for Chinook in the ocean may be restricted in the years ahead, when winter-run fish born in 2014 and 2015 have become big enough to bite a baited hook. The hope is that the few young fish that survived the recent warm-water die-offs will make it through adulthood and eventually return to the river to spawn.

Read the full story at New York Now

 

Climate change fuels cod collapse

November 3, 2015 — The strongest link yet between climate change and the collapse of New England’s cod fish stunningly confirms how global emissions fuel regional calamities. The problems can no longer be contained by fishery council catch limits. They now demand worldwide greenhouse gas solutions.

A team of scientists, including those from the Gulf of Maine Research Institute, the University of Maine, and the Bigelow Laboratory for Ocean Sciences in Maine, found that average surface water temperature in the Gulf of Maine rose four degrees between 2004 and 2013. Temperatures in the gulf have risen faster than in 99 percent of all sea waters, with record warmth recorded in 2012.

Four degrees is trivial to humans, who can shed sweaters or seek shade. But for a cold-blooded fish at the southern edge of its breeding range, unable to turn on the AC against the northward shift of the Gulf Stream, four degrees is a sauna. Less cod larvae survive in warmer water, possibly because their cold-water zooplankton food is also less available. Surviving cod then seek deeper, colder water, where more voracious predators await to compound their mortality.

The study, published last week in the journal Science, helps explain why cod stocks have not rebounded under draconian federal catch limits. Adding in the negative impact of warmer water, researchers found that fishing mortality was far too high to rebuild stocks even when fishermen did not exceed quotas.

Read the full story at Boston Globe

Climate change hurting New England cod population, study says

October 29, 2015 — The rapid warming of the waters off New England has contributed to the historic collapse of the region’s cod population and has hampered its ability to rebound, according to a study that for the first time links climate change to the iconic species’ plummeting numbers.

Between 2004 and 2013, the mean surface temperature of the Gulf of Maine — extending from Cape Cod to Cape Sable in Nova Scotia — rose a remarkable 4 degrees, which the researchers attributed to shifts in the ocean currents caused by global warming.

The study, which was released Thursday by the journal Science, offers the latest evidence of climate change — this time, affecting a species once so plentiful that fishermen used to joke that they could walk across the Atlantic on the backs of cod.

Fisheries management officials have sharply limited cod fishing in hopes of protecting the species, but they estimate the number of cod remain at as little as 3 percent of what would sustain a healthy population. The limits, in turn, have hurt fishermen.

“Managers [of the fishery] kept reducing quotas, but the cod population kept declining,” said Andrew Pershing, the study’s lead author and chief scientific officer of the Gulf of Maine Research Institute in Portland. “It turns out that warming waters were making the Gulf of Maine less hospitable for cod, and the management response was too slow to keep up with the changes.”

The institute had reported last year that the rise in temperatures in the Gulf of Maine exceeded those found in 99 percent of the world’s other large bodies of saltwater. The authors of Thursday’s study link the rapid warming to a northward shift in the Gulf Stream and changes to other major currents in the Atlantic and Pacific oceans.

They say the warmer water coursing into the Gulf of Maine has reduced the number of new cod and led to fewer fish surviving into adulthood. Cod prefer cold water, which is why they have thrived for centuries off New England.

The precise causes for the reduced spawning are unclear, the researchers said, but they’re likely to include a decline in the availability of food for young cod, increased stress, and more hospitable conditions for predators. Cod larvae are View Story eaten by many species, including dogfish and herring; larger cod are preyed upon by seals, whose numbers have increased markedly in the region.

Read the full story at the Boston Globe

Scientists: Warming Ocean Factor in Collapse of Cod Fishery

October 29, 2015 — PORTLAND, Maine (AP) — The rapid warming of waters off New England is a key factor in the collapse of the region’s cod fishery, and changes to the species’ management are needed to save one of America’s oldest industries, according to a report published Thursday in Science magazine.

Fishery managers say cod spawning in the Gulf of Maine — a key fishing area between Cape Cod and Canada that touches Massachusetts, Maine and New Hampshire — is only about 3 percent of sustainable levels, and participants in the fishery that dates to the Colonial era face dramatic quota cuts as a result.

The scientists behind the Science report say the warming of the Gulf of Maine, which accelerated from 2004 to 2013, reduced cod’s capacity to rebound from fishing pressure. The report gives credence to the idea — supported by advocacy groups, fishing managers and even some fishermen — that climate change has played a role in cod’s collapse.

The lead author of the study, Andrew Pershing of the Gulf of Maine Research Institute in Portland, said the gulf is warming at a rate 99 percent faster than anywhere else in the world, and as a result, too many of the fish aren’t living past age 4 or 5. Cod can live to be older than 20.

“Every animal has a temperature range that they prefer. The Gulf of Maine, for cod, is really at the warm end of that,” Pershing said. “If you warm it, you push it somewhere that’s really uncomfortable.”

Read the full story from the Associated Press at The New York Times

Sea Warming Leads to Ban on Fishing in the Arctic

July 16, 2015 — WASHINGTON — The United States and four other nations that border the Arctic Ocean pledged on Thursday to prohibit commercial fishing in the international waters of the Arctic until more scientific research could be done on how warming seas and melting ice are affecting fish stocks.

The agreement came as an annual report on the world’s climate — released by the National Oceanic and Atmospheric Administration and the American Meteorological Society — said that temperatures on the ocean surface reached the highest levels in 135 years of record keeping.

The ocean’s rising temperature, which was particularly acute in the Northern Pacific last year, has drawn fish stocks farther north. That development, along with the shrinking levels of ice, has raised the prospect of industrial-scale fishing in the once-inaccessible Arctic.

“Climate change is affecting the migration patterns of fish stocks,”Norway’s foreign minister, Borge Brende, said in a statement after the declaration was signed in Oslo, the Norwegian capital. He said that Norway and the other coastal states in the Arctic — Canada, Denmark (on behalf of its territory of Greenland), Russia and the United States — had a “particular responsibility” to regulate fishing that is likely to occur there.

Read the full story at The New York Times