Saving Seafood

Study: Gulf of Maine warming faster than thought

January 19, 2016 — The news just keeps getting worse for cold-temperature fish such as cod in the ever-warming waters of the Gulf of Maine.

A new study, conducted by National Oceanic and Atmospheric Administration researchers and appearing in the Journal of Geophysical Research — Oceans, reached an ominous conclusion: the waters of the Gulf of Maine, which a previous study showed to be warming faster than 99.9 percent of the rest of the planet’s oceans, are continuing to warm at an accelerated rate and are expected to continue doing so for at least the next 80 years.

“The Gulf of Maine is really being subjected to a one-two punch,” said Vincent Saba, a NOAA Fisheries scientist and lead author of the study. “On one hand, the region is dealing with the elements of global warming being experienced in all of the oceans, but there also has been a change in the circulation of the two gulf streams that feed into the Gulf of Maine.”

The result, according to Saba, is that more of the warmer water contained in the shifting Gulf Stream is making its way into the Gulf of Maine from the south, while less of the colder water from the Arctic and Labrador streams are entering the gulf from the north and east.

“The Gulf of Maine really sits at the intersection of those two currents,” Saba said.

Saba said the climatic models used in the study project the warming trend could continue for the next 80 years, potentially rising another 4 to 7 degrees Fahrenheit and setting the stage for extreme and potentially ruinous changes in the region’s ecosystem.

Read the full story at The Salem News

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

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 

 

The Great Northern Cod Comeback

October 27, 2015 — Once an icon of overfishing, mismanagement, and stock decline, the northern Atlantic cod is showing signs of recovery according to new research published today in the Canadian Journal of Fisheries and Aquatic Sciences.

This research, led by Dr. George Rose, tracks what is arguably the most important comeback of any fish stock worldwide. Studying the great northern Atlantic cod stock complex off Newfoundland and Labrador, once considered among the largest cod stocks in the world before its disastrous decline in the 1990s, Dr. Rose documents the stock’s rebound over the past decade from tens of thousands to several hundred thousand tonnes and growing.

Read the full story at Science Codex