Movement of marine life follows speed and direction of climate change

Scientists expect climate change and warmer oceans to push the fish that people rely on for food and income into new territory. Predictions of where and when species will relocate, however, are based on broad expectations about how animals will move and have often not played out in nature. New research based at Princeton University shows that the trick to more precise forecasts is to follow local temperature changes.

The researchers report in the journal Science the first evidence that sea creatures consistently keep pace with “climate velocity,” or the speed and direction in which changes such as ocean temperature move. They compiled 43 years of data related to the movement of 128 million animals from 360 species living around North America, including commercial staples such as lobster, shrimp and cod. They found that 70 percent of shifts in animals’ depth and 74 percent of changes in latitude correlated with regional-scale fluctuations in ocean temperature.

“If we follow the temperature, which is easier to predict, that provides a method to predict where the species will be, too,” said first author Malin Pinsky, a former Princeton postdoctoral researcher in ecology and evolutionary biology who is now an assistant professor of ecology and evolution at Rutgers University.

“Climate changes at different rates and in different directions in different places,” he said. “Animals are basically being exposed to different changes in temperature.”

The researchers compiled survey data collected from 1968 to 2011 by American and Canadian fishery-research centers and government panels. The surveys recorded surface and bottom temperatures, as well as the complete mass of animals in nine areas central to North American fisheries: the Aleutian Islands; the eastern Bering Sea; the Gulf of Alaska; the West Coast from Washington to California; the Gulf Coast from Louisiana to Mexico; the Northeast coast from North Carolina to Maine; the coast of Nova Scotia; the southern Gulf of St. Lawrence; and the Atlantic Ocean east of Newfoundland.

Details of the surveys revealed that sea creatures adhere to a “complex mosaic of local climate velocities,” the researchers reported. On average, changes in temperature for North America moved north a mere 4.5 miles per decade, but in parts of Newfoundland that pace was a speedier 38 miles north per decade. In areas off the U.S. West Coast, temperatures shifted south at 30 miles per decade, while in the Gulf of Mexico velocities varied from 19 miles south to 11 miles north per decade.

Animal movements were just as motley. As a whole, species shifted an average of 5 miles north per decade, but 45 percent of animal specific populations swam south. Cod off Newfoundland moved 37 miles north per decade, while lobster in the northeastern United States went the same direction at 43 miles per decade. On the other hand, pink shrimp, a staple of Gulf Coast fisheries, migrated south 41 miles per decade, the researchers found.

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Sam Rauch, NOAA acting administrator for fisheries, testifies about 10 year rebuilding timeline

SEAFOOD.COM NEWS [seafoodnews.com] Sept 12, 2013 – In Congressional testimony on Monday, NOAA Acting Assistant Administrator for Fisheries Sam Rauch responded to the latest NRC report calling for more flexibility in stock rebuilding timelines. A portion of his comments are below:

“We`ve heard concerns from stakeholders that the 10-year rebuilding timeline may be arbitrary and too restrictive.

In response to these concerns and similar concerns expressed by Members of Congress, in 2011 NOAA commissioned the National Academy of Sciences` National Research Council (NRC) to conduct a comprehensive evaluation of success in stock rebuilding and identification of changes made to fisheries management in response to rebuilding requirements. NOAA asked the NRC to study seven topics related to rebuilding to help us and the Councils better construct efficient and effective rebuilding plans.

The NRC rebuilding study was released on September 5, 2013. We are thankful for the in-depth and forward looking review provided by the NRC, and at present we are carefully analyzing the report`s details. The timing of the report fits nicely with our work to revise National Standard 1 Guidelines. Since the guidelines were last updated in 2009, a number of issues regarding the application of the guidelines have been identified by stakeholders and managers, and these issues may warrant revisions. An Advanced Notice of Proposed Rulemaking was published on May 3, 2012 to solicit public input, and several report findings reflect possible revisions to the guidelines similar to those currently being considered by NMFS. At this time, NMFS would like to acknowledge a few aspects of the report:

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Unprecedented Rate and Scale of Ocean Acidification Found in the Arctic

ST. PETERSBURG, Fla. — Acidification of the Arctic Ocean is occurring faster than projected according to new findings published in the journal PLOS ONE.  The increase in rate is being blamed on rapidly melting sea ice, a process that may have important consequences for health of the Arctic ecosystem.

Ocean acidification is the process by which pH levels of seawater decrease due to greater amounts of carbon dioxide being absorbed by the oceans from the atmosphere.  Currently oceans absorb about one-fourth of the greenhouse gas.  Lower pH levels make water more acidic and lab studies have shown that more acidic water decrease calcification rates in many calcifying organisms, reducing their ability to build shells or skeletons.  These changes, in species ranging from corals to shrimp, have the potential to impact species up and down the food web.

The team of federal and university researchers found that the decline of sea ice in the Arctic summer has important consequences for the surface layer of the Arctic Ocean.  As sea ice cover recedes to record lows, as it did late in the summer of 2012, the seawater beneath is exposed to carbon dioxide, which is the main driver of ocean acidification.

In addition, the freshwater melted from sea ice dilutes the seawater, lowering pH levels and reducing the concentrations of calcium and carbonate, which are the constituents, or building blocks, of the mineral aragonite. Aragonite and other carbonate minerals make up the hard part of many marine micro-organisms’ skeletons and shells. The lowering of calcium and carbonate concentrations may impact the growth of organisms that many species rely on for food.

The new research shows that acidification in surface waters of the Arctic Ocean is rapidly expanding into areas that were previously isolated from contact with the atmosphere due to the former widespread ice cover.

“A remarkable 20 percent of the Canadian Basin has become more corrosive to carbonate minerals in an unprecedented short period of time.  Nowhere on Earth have we documented such large scale, rapid ocean acidification” according to lead researcher and ocean acidification project chief, U.S. Geological Survey oceanographer Lisa Robbins.

Globally, Earth’s ocean surface is becoming acidified due to absorption of man-made carbon dioxide. Ocean acidification models show that with increasing atmospheric carbon dioxide, the Arctic Ocean will have crucially low concentrations of dissolved carbonate minerals, such as aragonite, in the next decade.

Read the full article here.

In the U.S., Good News on Fisheries

Around the world, the status of fish and fisheries is grim indeed. Approximately 85 percent of global fish stocks are either over-exploited, fully-exploited, depleted or recovering from depletion. But rigorous management efforts have resulted in some American fisheries making a comeback.

The new report by the National Research Council assessed 55 fisheries and found 10 that have been rebuilt and five that showed good progress toward rebuilding; only nine continue to experience overfishing. What about the rest? Eleven have not shown strong progress in rebuilding but are expected to rebuild if fishing levels remain reduced and a whopping 20 were not actually over-fished despite having been initially classified as such.

The report comes with a neat interactive online graphic to track the fate of fish populations in different regions over the years. By selecting particular species or geographic areas, users can watch, as for example, yelloweye rockfish becomes steadily overfished, as chinook salmon numbers – especially susceptible to changing environmental conditions – swing wildly back and forth, and the likes of lingcod, George’s Bank haddock, king mackerel and Bering Sea snow crab stage their marches toward recovery.

The report is fairly technical, so for a summary – and an explanation of what it means in practical terms for U.S. fish consumers – Discovery News turned to Chris Dorsett, Director of Ecosystem Conservation Programs for the Ocean Conservancy.

“If you look at a map of the United States and where overfishing is still occurring, it’s almost exclusively an east coast problem,” he points out. “And when I say east coast, I mean Gulf of Mexico as well. Where we have not seen success in terms of species recovering based on management actions, that could be due to climatic factors, which aren’t particularly good for productivity. It could be due to management regimes that aren’t particularly effective. But what exacerbates the issue is that, when you drive a population to an extremely low abundance level, environmental variability plays an even more meaningful role in the recovery of that population, so recovery is a little less predictable.”

As the classic case in point, Dorsett points to cod fisheries off Canada, which collapsed in the 1990s and subsequently saw catches slashed essentially to zero. Despite such drastic measures, neither the fish population nor the fishery has shown signs of recovery.

As the NRC report notes, however, there remains some variation: fishing pressure is still too high for some fish stocks, and others have not rebounded as quickly as plans projected. To a large extent, argues Dorsett, that’s a function of natural variability in fish populations and their environments, as well as differences in the ways fisheries have been managed over the years.

In general, though, the news remains positive, increasingly so, and is reflected in the choices available to consumers.

Read the full article here.

Monterey Bay trawling deal hailed as a breakthrough: Fishermen, environmentalists long at odds

A “lava-in-water” effort to redefine trawling boundaries off the Central Coast may prove a turning point in the long-simmering relationship among commercial fishermen, environmentalists and the Monterey Bay National Marine Sanctuary.

The groups spent nearly a year negotiating a proposal that identifies areas the Pacific Fisheries Management Council should reopen and close to bottom fishing in the sanctuary. It was a task, participants said, that took its toll and tested the mettle of individual patience.

“There were times in it where everybody was pretty much fed up and ready to walk away, especially when the environmental groups got involved,” said Monterey fisherman Giuseppe Pennisi II.

“This was like mixing lava with water,” he said. “We had stuff boiling everywhere. We had to stop meetings and everybody go out and cool off.”

In the end, they came up with the hallmark of a good compromise: nobody got everything he wanted.

Sanctuary Superintendent Paul Michel described the outcome as a “precedent-setting, historic accomplishment.”

The “Essential Fish Habitat” boundaries were last set in 2006. Research since then identified new areas of coral and sponge that needed critical protection, said Michel.

At the same time, fishermen were unhappy with the hop-scotch effect of the boundaries. They were spending less time fishing than they were picking up and putting back nets to avoid protected areas.

“We just wanted to get some of our traditional places back that were just sand and mud,” said Pennisi. “Oceana just wanted real estate. They got back a lot more than what they gave up.”

Still, the third-generation fisherman credited the sanctuary’s Karen Grimmer, Monterey Harbormaster Steve Scheiblauer and Huff McGonigal of the Environmental Defense Fund for guiding the combatants to a “common goal” — more fish.

The proposal was submitted to the fisheries council July 31. That agency will submit its recommendation to the National Oceanic and Atmospheric Administration for final approval, a process that could take two years.

Geoff Shester of Oceana said the process was so encouraging that his group, historically at odds with fishermen, is hoping to reach a future consensus that would open trawling to prized parts of Monterey Bay, which sits in state waters, in exchange for additional closures in federal waters.

Read the full article here.

California Wetfish Producers Association

California’s fishing industry was built largely on ‘wetfish’, so called because historically these fish were canned ‘wet from the sea’, with minimal preprocessing. Sardines, mackerel, anchovy and market squid (now called coastal pelagic species) have contributed the lion’s share of California’s commercial seafood harvest since the turn of the 20th century.

The enterprise of immigrant fishermen founded California’s wetfish industry, building up the ports of Monterey and San Pedro, San Diego and San Francisco. Today’s wetfish industry is a traditional industry with a contemporary outlook: streamlined and efficient, but still peopled by fourth and fifth-generation fishing families. Today the sons and daughters continue the enterprise begun by their fathers and grandfathers 100 years ago.

Transformed from its storied beginning, California’s wetfish industry remains an essential part of the state’s fishing culture, as well as a key contributor to our fishing economy, producing more than 80 percent of the volume and 40 percent of dockside value of all commercial fishery landings statewide.

Coastal pelagic species are also among the Golden State’s most important seafood exports. In a state that imports more than 86 percent of its seafood, the wetfish complex contributes close to 80 percent of all seafood exports, helping to offset the seafood trade imbalance.

This industry has invested in cooperative research since the beginning of the California Cooperative Fishery Investigations (CalCOFI) in the 1940s, when wetfish fishermen assessed their harvest to help fund the research partnership developed among the California Department of Fish and Game, Scripps Institution of Oceanography and the Southwest Fisheries Science Center (SWFSC).

Wetfish industry leadership established the nonprofit California Wetfish Producers Association (CWPA) in 2004, including fishermen and processors who produce most of the harvest statewide. CWPA’s mission promotes education, communication, and cooperative research to ensure sustainable fisheries.

Today CWPA’s research program continues the CalCOFI tradition, collaborating with the California Department of Fish and Wildlife and Southwest Fishery Science Center to expand knowledge of coastal pelagic species.

Read the full story here.

California’s squid industry is booming

For years, the squid business in Morro Bay has been light weight, but this year, it’s heavy. Tons and tons of Market Squid are brought into the harbor every morning.

The abundance is because it’s spawning season. At this time of the year, Market Squid travel in massive schools to spawn and die.

The squid industry was volatile for a few years because the state did not want them to be over-fished, so regulations were put in place. Today, there is a limit on how many one boat can catch, and under new regulations, they cannot be fished on the weekends.

“This boat went out last night. They can get 40 tons in a couple hours,” said Giovanni DeGarimore.

The Ocean Angel threw nets just off the coast from Pismo Beach.

“They use these big nets. So they circle it and then they close it up at the bottom and scoop it all up,” he explained.

Once they’ve scooped tons and tons of squid, the boat heads back to Morro Bay to unload.

“We are unloading for Del Mar Seafoods. They are one of the larger producers of calamari in California,” said DeGarimore.

For Giovanni DeGarimore. the process is like a harvest. The tanks on the boat are connected to a suction tube that moves the squid onto a conveyer belt. The squid are then dumped into bins and iced.

Watch the story and read the article here.

New grant to “fill gap” in sardine stock assessment

New aerial surveys of sardines off Southern California will address fishermen’s concerns that sardine abundance estimates are effectively “missing California fish.”

Collaborative Fisheries Research West has awarded a $16,000 grant to a California sardine industry group to help pay for two spotter-pilot surveys. The first survey is being flown this summer and the second will occur in the spring of 2014.

The project’s leaders hope to use digitally enhanced photos of fish schools taken during the flights to develop a scientifically rigorous method for calculating sardine abundances. If this can be done, they will ask the Pacific Fishery Management Council, which manages the Pacific sardine fishery with NOAA Fisheries, to consider including California aerial survey data into its future stock assessments, from which harvesting limits are set.

Read the full article here.

California Department of Fish and Wildlife pilot Tom Evans (left) flies transects while spotter Devin Reed (right) identifies sardine schools, which are then photographed. Credit: K. Lynn/CDFW

Environmental cost of conservation victories

In recent years, Marine Protected Areas (MPA), where fishing is severely restricted or not allowed, have become the Holy Grail of marine conservation for both nongovernmental organizations and governments. In the United States, the Papahānaumokuākea Marine National Monument in the NW Hawaiian Islands became the first large-scale reserve closed to fishing in 2006 (1). This reserve is 90% the size of California and was followed by the Pacific Remote Islands Marine National Monument, about half the size of California, in 2009 (2). In total, the United States has established MPAs 19-times the size of California or roughly the area of the Continental United States.

The United States is not alone. The South Georgia and South Sandwich Islands Marine Protected Area in British sub-Antarctic waters is roughly 2.5-times the area of California, and most recently Australia has declared its economic zone in the Coral Sea a no-take area of 3.1 million square kilometers, an area eight times the size of California. All of these areas are heralded as great conservation victories and the Convention on Biodiversity has set a target of 10% of the ocean protected by 2020.

Are these indeed victories? Not necessarily. I suggest it is likely that the world’s environment is actually worse off once such victories are evaluated globally.

Read the full article here.

Mantis Shrimp Facts

In this True Facts animal segment we take a look at amazing Mantis Shrimp Facts as we discover and learn about this unique sea creature. I had no idea that the Mantis Shrimp is a prehistoric fossil of the living clown but it makes perfect sense once it’s explained. I also wasn’t aware how deadly and ferocious a Mantis Shrimp can be when it comes to protecting it’s underwater turf and surviving in the ocean.

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