Saving Seafood

Maine isn’t doing enough to protect the Gulf from the effects of climate change

October 30, 2015 — When the Maine Legislature’s commission on ocean acidification reported its findings – that the state’s fisheries and aquaculture industries were threatened by this baleful byproduct of global warming – officials here were not exactly spurred to action.

Acidification, driven by increased carbon dioxide from the atmosphere and freshwater runoff from extreme rainfall in river basins, has been implicated in failures at oyster hatcheries and mussel farms, and has been shown to weaken clams and other shell-building animals vital to Maine’s fishing and aquaculture industries. But bills introduced in the last session – one each by a Democratic marine scientist and a Republican lobsterman – to implement many of the panel’s findings were withdrawn, one for lack of resources, the other for lack of support from Gov. Paul LePage’s administration.

“I could see the bill wasn’t going to go anywhere and that the governor was going to veto it,” Rep. Mick Devin, a Democrat from Newcastle, says of legislation he sponsored to allow the commission to continue its work for another three years.

Patricia Aho, who was the commissioner of environmental protection until she resigned in August, opposed Devin’s bill, saying the status quo was sufficient. “Since the issues of climate change and ocean acidification are inextricably linked, we think it will be more efficient to consider this issue in the broader context of climate change and adaptation programs,” she said in written testimony to legislators.

Devin’s bill and another one sponsored by Rep. Wayne Parry, a Republican from Arundel, were carried over to the next legislative session. Parry’s bill would have put a bond issue on the ballot that would borrow $3 million to fund several of the expert committee’s recommendations: collecting data, monitoring waterways, and performing tests in coastal waters to better assess the impact of acidification on wildlife and commercial fish species. It was withdrawn after failing to make it to the top of an informal list of bonding priorities drawn up by legislative leaders.

Read the full story at Portland Press Herald

 

NEFMC: Response to Study on Rising Water Temps in the Gulf of Maine

October 29, 2015  — The following was released by the New England Fishery Management Council:

The Gulf of Maine, located off northern New England and Canada, has hosted important commercial and recreational marine fisheries for centuries. In addition to existing threats from land-based pollution, marine discharges, energy development, and disturbances to habitat, a more recent problem, temperature rise, has emerged. The just-published paper in Science —Slow Adaptation in the Face of Rapid Warming Leads to the Collapse of Atlantic Cod in the Gulf of Maine — adds to the increasing body of work on this topic.

As an organization responsible for the management of fisheries in federal waters that encompass the Gulf of Maine, the New England Fishery Management Council (Council), along with partners, NOAA Fisheries and the New England states, offers comments on this paper.

  • Most importantly, climate change is a very real issue that affects fisheries in ways we are just beginning to understand and is one the Council and others must confront.
  • This particular paper presents interesting research, but as is generally the case, it is rare that any one scientific study provides “The Answer.” This one will almost certainly generate more discussion and further consideration of how fisheries management bodies might respond.
  • NOAA’s Northeast Fisheries Science Center is actively investigating climate change that could help develop possible responses. The Science paper will likely become part of the larger discussion on how to adapt and respond to climate change. During that process, it will be the subject of careful review, including testing of its assumptions and conclusions. Should they stand up to this scrutiny, the work may influence future quota-setting
  • Work is underway by the Council to look more broadly at fisheries through ecosystem-based fisheries management; those efforts may illuminate the way in which we consider this pressing threat to the productivity of fisheries in the Gulf of Maine and elsewhere.
  • More critically, the Science paper appears to presume that the Council should have anticipated the unusual temperature rise in 2012, without any explanation of how that could have been done. The current quota for Gulf of Maine cod is the lowest on record, and will almost certainly remain so in the foreseeable future. The goal at this time is to allow sustainable levels of fishing on healthy stocks, such as haddock, redfish, and pollock to continue, while creating the opportunity for cod to recover.

After reviewing the paper, Council Executive Director Tom Nies summarized his reaction to the challenges raised in the Science paper. “Fishery managers will need to adapt to the host of significant changes caused by the rapid rise in water temperatures in the Gulf of Maine; specifically, the New England Council will continue its close partnership with the scientific community in order to mount an effective response to this circumstance.”

View a PDF of the release here

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

Ocean acidification threatens future of aquaculture, shellfish industries

October 29, 2015 — In seawater tanks in a refrigerated room at the Darling Marine Center, the baby mussels are thriving.

Two months ago they were near-invisible larvae, swimming around in the tanks. Now tens of thousands of the tiny mollusks, each just a few millimeters long, have attached themselves to the different kinds of rope scientists have been testing here, and are eating the lab’s stock of algal food at an impressive clip.

Mick Devin, the lab manager at this University of Maine marine research facility, has been overseeing this experiment, part of an effort to master the art of hatching mussels, something mussel farmers – who grow their product on lines hanging in seawater – have never previously needed to do.

“Mussel farmers have been able to just throw their lines out and collect all the larvae they want from nature,” Devin says. “But mussel populations are down drastically in this state, so that may not be working so well now.” Hatcheries, he expects, may have to step up in the not-too-distant future.

Mussels have been vanishing from stretches of coastline where they once were ubiquitous, and scientists remain uncertain as to why. Green crabs, whose population exploded after an “ocean heat wave” in 2012, may have stripped many sections clean. But warmer water and increased rainfall – both problems expected to grow in Maine as a result of global climate change – may be creating a far worse problem: an acid sea.

“We know this affects larval development in bivalves, (and) chances are it will result in decreased numbers, whether it’s a natural population on a bed or one in a farm,” says Paul Rawson of the University of Maine’s School of Marine Sciences, who is in charge of the research. “We need to make sure the technology is in place so the farms will have a reliable source of seed.”

The world’s oceans are turning more acidic. Since the Industrial Revolution, carbon dioxide levels in the atmosphere have grown by more than 70 percent and now stand at the highest level in at least 800,000 years. As the oceans absorb additional CO2, they’ve become 30 percent more acidic over this period. By 2050, scientists estimate surface pH levels will be lower – that is, more acidic – than at any time in several million years and by 2100 more acidic than any time in the past 300 million years – two or three times more so than today.

Read the full story at Portland Press Herald

Cod Could Recover in Warming Waters

October 28, 2015 — The first clue came in 2008, recalled George Rose, a marine biologist at Memorial University of Newfoundland, when he saw the cod aggregating in large numbers offshore during the spawning season. It was a sight he had sorely missed in 15 years. In the early 1990s, cod fisheries suffered such a dramatic collapse that they emerged as an aquatic poster child for fisheries mismanagement, according to Rose.

In a paper published yesterday in the Canadian Journal of Fisheries and Aquatic Sciences, Rose and his colleague, Sherrylynn Rowe, document the comeback of the Atlantic cod off Newfoundland and Labrador over the past decade. The fact that they have shown that the cod stock there is on the way to recovery is good news, Rose said, as “it shows that it is not all gloom and doom.”

Their study attributed the recovery to improved environmental conditions, better fish management and the availability of an important food source, capelin, whose populations also fell drastically in the early 1990s and have recently bounced back, too. The rebound of Atlantic cod in this region contrasts with their rapidly declining populations off the northeastern coast of the United States, where until last year the stocks remained significantly below sustainable levels. Previous research has associated this persistent population slump with the pressures of overfishing and also warming waters. The warming temperatures, however, seem to be favoring a cod fishery revival in Newfoundland and Labrador, or at least not hampering its recovery.

Read the full story at Scientific American 

 

Invasive species exploit a warming Gulf of Maine, sometimes with destructive results

October 28, 2015 — Until two years ago, if you had walked down to the shore of Maquoit Bay at low tide, you would have seen a meadow of eelgrass stretching nearly as far as the eye could see across the exposed seafloor. Here near the head of the bay, the sea grass stretched for two miles to the opposite shore, creating a vast nursery for the shellfish and forage species of Casco Bay, of which Maquoit is a part.

Now there’s only mud.

Green crabs took over the bay in the late fall of 2012 and the spring and summer of 2013, tearing up the eelgrass in their pursuit of prey and devouring almost every clam and mussel from here to Yarmouth. Fueled by record high water temperatures in 2012 and a mild winter in 2013, the green crab population grew so huge that the mudflats of Casco Bay became cratered with their burrowing, and much of the Maquoit and adjacent Middle Bay bottom turned into a lunar landscape.

Eelgrass coverage in Maquoit Bay fell by 83 percent. With nothing rooted to the bottom, the seawater turned far muddier, making life hard on any plants or baby clams that tried to recolonize the bay.

“We were astounded,” says Hilary Neckles of the U.S. Geological Survey’s Patuxent Wildlife Research Center, who linked the destruction to the green crabs. “The ecological ramifications really reverberate throughout the ecosystem, because sea grass is the preferred habitat of so many fish and shellfish species.”

Over the past decade, the Gulf of Maine has been one of the fastest-warming parts of the world’s oceans, allowing warm-water intruders to gain a toehold and earlier invaders such as the green crab to take over. Coupled with declines of the cold-loving species that have dominated the gulf for thousands of years, the ecological effects of even more gradual long-term warming are expected to be serious, even as precise forecasting remains beyond the state of scientific knowledge.

Scientists say the 2012 “ocean heat wave” was an unusual event, and that the 10-year accelerated warming trend is likely part of an oceanographic cycle and unlikely to continue. But the gulf has been consistently warming for more than 30 years, and long-term forecasts project average sea surface temperatures in our region could reach 2012-like levels by mid-century. The events of 2012 and the nearly as warm year that followed likely provide a preview of things to come, of a gulf radically transformed, with major implications for life on the Maine coast.

Genevieve MacDonald, who fishes for lobster out of Stonington, was standing on the dock at Isle au Haut one morning that summer, looked in the water, and couldn’t believe her eyes. There, swimming around the harbor like mackerel, were dozens and dozens of longfin squid, temperate creatures rarely seen in the chill waters of eastern Maine. “If you had a cast net you could have brought in a whole basket full of squid,” she recalls.

Read the full story at Portland Press Herald

Climate Change a Pervasive Reality on Cape Cod

October 27, 2015 — What if climate change isn’t something that is going to happen in the distant future, somewhere far away? What if it’s happening right here, right now? That’s the question the Cape Cod Times is asking – and answering – all week in a special series on the local impacts of climate change, from shrinking beaches and disappearing lobsters to more aggressive storms.

Cape Cod Times reporter Doug Fraser has been covering Cape Cod since 1993, and photographer Steve Heaslip has been on the beat for thirty four years. Both say they’ve witnessed climate change with their own eyes, and relish every opportunity to shine a spotlight on the issue.

But the picture isn’t a pretty one. Consider:

  • Air temperatures have been rising rapidly. Changes in winter temperatures have been particularly dramatic, increasing an average of 1.3 degrees F per decade between 1970 and 2000. Summer temperatures have risen just half a degree per decade during that same time. Still, if greenhouse gas emissions continue to increase, Massachusetts could see between 3 and 28 days over 100 degrees F by the year 2100; we currently see fewer than two such days.

Read the full story at WCAI

 

Harmful algal blooms and climate change: Preparing to forecast the future

October 26, 2015 — Marine scientists attending an international workshop warned that the future may bring more harmful algal blooms (HABs) that threaten wildlife and the economy, and called for changes in research priorities to better forecast these long-term trends.

The findings of the international workshop on HABs and climate Change were published Friday in the journal Harmful Algae. The workshop was organized under the auspices of the North Pacific Marine Science Organization (PICES) and the Global Ecology and Oceanography of Harmful Algal Blooms (GEOHAB) and endorsed by the International Council for the Exploration of the Sea (ICES). The central findings were that while there are reasons to expect HABs to increase with climate change, poor scientific understanding seriously limits forecasts, and current research strategies will not likely improve this capacity.

Empirical observations suggest cause for grave concern. Northward expansion of phytoplankton species, wider seasonal windows for HAB development, and an increasing prevalence of HABs worldwide all indicate a future with greater problems.

The impacts of algal blooms are extensive. Although phytoplankton blooms normally fuel productive ecosystems, some blooms create very low oxygen concentrations in bottom waters, killing or driving out marine fish or benthic organisms. Others produce potent neurotoxins that threaten ecosystems and human health.

Read the full story at EurekAlert

 

Gulf of Maine’s cold-craving species forced to retreat to deeper waters

October 27, 2015 — For 178 years, dams stood across the Penobscot River here, obstructing salmon and other river-run fish from reaching the watershed’s vast spawning grounds, which extend all the way to the Quebec border.

Now, two years after the dam’s removal, the salmon’s proponents fear the fish face a more fearsome threat: a warming sea.

In recent years, the Gulf of Maine has been one of the fastest-warming parts of the world’s oceans, and climate change models project average sea surface temperatures here to increase by another 5.5 degrees Fahrenheit by 2065, a development that could extirpate Atlantic salmon and other cold-loving species, many of which already find Maine at the southern edge of their ranges.

“We’re all for taking down the dams and all the things that are going on to restore habitat, but how much are they looking at the evidence?” asks Gerhard Pohle of the Huntsman Marine Science Center in St. Andrews, New Brunswick, co-author of a study predicting how the changes are likely to affect 33 commercial species over the next 75 years. “Distribution of salmon in the Gulf of Maine would be such that there wouldn’t be many left at all.”

The warming gulf is already presenting challenges to many of its cold-loving denizens. Scientists at the National Marine Fisheries Services, or NMFS, have recorded the steady retreat of a range of commercially or ecologically important fish species away from the Maine coast and into deep water in the southwestern part of the gulf, where bottom water temperatures are cooler.

The retreat, which intensified over the past decade, includes cod, pollock, plaice, and winter and yellowtail flounder. Other native species that once ranged south of Long Island – lobster, sand lance and red hake – have stopped doing so, presumably because the water there is now too warm.

“You can imagine that when you have species at the southern end of their ranges, they will be really sensitive to these changes,” says Michael Fogarty, chief of the Ecosystem Assessment Program at the NMFS Northeast Fisheries Science Center in Woods Hole, Massachusetts. “They will either shift distribution or their survival rates might change.”

Read the full story at Portland Press Herald

NOAA Fisheries Accepts Petition to List Thorny Skate under ESA

October 26, 2015 — The following was released by NOAA Fisheries:

In response to a petition from Defenders of Wildlife and Animal Welfare Institute (AWI) to list thorny skate (Amblyraja radiata) under the Endangered Species Act, we have prepared a 90-day finding. We accept the petition and are initiating a review of the status of the species.

The petition, which we received in May 2015, requested that we list a “Northwest Atlantic Distinct Population Segment” or a “United States Distinct Population Segment” of thorny skate as threatened or endangered. The petition also requested a designation of critical habitat for thorny skate. 

The petitioners claim that the species numbers have been declining since the 1970s, and that the species is threatened by illegal landings, bycatch and discard mortality, inadequacy of existing regulatory mechanisms (related to fishing), global climate change and hypoxia, and natural stochastic events. 

We will now start a review of the status of the species to determine if listing the species or any potential distinct population segments is warranted. We are asking for public input through the Federal Register notice published today. 

You may submit information or data on this document by either any of the following methods: 

  • Online: Submit information and data via the Federal eRulemaking Portal. Click the “Comment Now” icon, complete the required fields, and enter or attach your comments. 
  • Mail: Submit information and data to Julie Crocker, NMFS Greater Atlantic Regional Fisheries Office, Protected Resources Division, 55 Great Republic Drive, Gloucester, MA 01930, USA.

The deadline for submissions is December 28.

Our determination will be published as a notice in the Federal Register within 12 months.

Questions? Contact Jennifer Goebel, Regional Office, at 978-281-9175 or Jennifer.Goebel@noaa.gov.

Thorny skate. Credit: NOAA/Tobey Curtis