Jan 14 2016

Baby Fish May Get Lost in Silent Oceans as CO2 Rises

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Future oceans will be much quieter places, making it harder for young marine animals that navigate using sound to find their way back home, new research has found.

Under acidification levels predicted for the end of the century, fish larvae will cease to respond to the auditory cues that present-day species use to orient themselves, scientists reported in the journal Biology Letters.

While ocean acidification is known to affect a wide range of marine organisms and processes such as smell, until now its effect on marine soundscapes and impact on the larvae of marine animals was unknown.

The ocean is filled with sounds that carry information about location and habitat quality, study co-author Sir Ivan Nagelkerken said.

“Along with chemical and other cues, because of sound’s ability to travel long distances underwater, it is used as a navigational beacon by marine animals, particularly larvae,” Dr Nagelkerken said.

“More than 95 per cent of marine animals have a dispersive larval stage, where larvae drift with the currents for anywhere from a few days to a year, before returning to settle in their adult habitat near where they were spawned.”

To understand how acidification affects these marine animals, the team led by PhD student Tullio Rossi travelled to a naturally occurring carbon dioxide vent near White Island in New Zealand, where ocean acidification levels are similar to those predicted for the end of the century under business-as-usual conditions.

“This natural laboratory gave us a peek into the future,” Dr Nagelkerken said.

“We recorded the soundscape around the vent, then compared the loudness and composition of sounds with control sites a few hundred metres away.”

The area around the vent was much quieter, the team found.

“There could be a number of explanations for the decrease in sound,” Dr Nagelkerken said.

“For example, as acidification increases, kelp forests may be replaced by turf algae. This results in changing abundance of the animals that produce sounds, such as snapping shrimp whose ubiquitous crackle forms the backdrop to present-day ocean soundscapes.”

To understand how acidification affects marine animals’ auditory preferences, the researchers studied the impact of increased carbon dioxide levels on settlement-stage mulloway (Argyrosomus japonicas), a common temperate fish species.

They found that the 25- to 28-day-old larvae that had been exposed to higher carbon dioxide concentrations deliberately avoided present-day acoustic habitat cues recorded near White Island, while fish reared in present-day carbon dioxide levels responded positively.

Neither group of fish responded to the “future” soundscape recorded around the vent, despite the hearing of the normal fish being unimpaired.

Ocean acidification is known to increase the size of otoliths — fish ear bones — used for hearing, orientation and balance.

It has been hypothesised that bigger ear bones would increase the hearing range of larval fish, but the hearing in fish reared in future carbon dioxide levels was negatively impacted by ocean acidification, even though they had larger ear bones.

Dr Nagelkerken said the findings suggested that in the future, affected species would have to use other, potentially less reliable cues to help them navigate, even though other senses such as vision and smell are also negatively impacted by ocean acidification.

“Finding a home is the key to population sustainability,” Dr Nagelkerken said.

“Those that rely on sound as an orientation cue will be heavily impacted, limiting their ability to survive and contribute to the population.”


 

Article first appeared on ABC Science.

Read the Discovery post: http://news.discovery.com/

 

Jan 14 2016

La Jolla considering new way to deal with sea lions

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SAN DIEGO (CBS 8) – La Jolla may have finally found a solution for dealing with the strong stench coming from the poop of sea lions.

On Tuesday night, the town council heard a new idea for keeping sea lions off the bluffs at La Jolla Cove.

Since ssea lion make their way up to the guardrail each night, the city hired a company to spray germ killing foam to get rid of the poop, but critics say it only lasts a week and the odor is back.

There are strict coastal regulations on how to take care of the sea lions and now there could be a solution.

The high surf has the sea lions on higher ground in the La Jolla Cove and residents and visitors can smell their poop is giving off strong stench.

“The smell here in La Jolla makes it very difficult for anyone of us who live here to put up with it and it makes it very difficult for tourists to come here. It hurts the business, it hurts the community and it hurts the individuals,” said La Jolla resident Barry Jadgoda.

After months of exploring options of what is legal, humane and efficient, the La Jolla Town Council Coastal Committee gave a first look at the marine mammal safety barriers.

“These are large cylinders that are inflatable and when the sea lions try to go over them they spin so the sea lions can’t get any leverage on them,” said La Jolla Town Council President Steve Haskins.

The safety barriers have been supported by the national oceanic atmospheric administration.

“When the sea lions attempt to pass over the spin, no matter how much they try to get traction, they can’t,” said Haskins.

The rollers will be placed on the east and west end of the cove to control where the sea lions do their business.

“I like this idea. I’m actually pleasantly surprised to have come down here to see it,” said Claude-Anthony Marengo, La Jolla Merchants Association President.

Still, how and who should scoop the poop has been raising a stink for several years.

“How do you interface with the city? How do you get them off their ass and how are we going to move forward on this because obviously we appreciate your leadership,” said Barry Jagoda.

The La Jolla Town Council is expected to approve the barrier plan on Thursday, share it with organizations, and hope the City Council will approve without going through the coastal commission approval.

Council President Lightner supports the plan, while a judge has rejected a complaint that it’s the city’s responsibility to scoop the poop, which is on appeal.


Read the original post: http://www.cbs8.com/

Jan 12 2016

Dual Impact of Ocean Acidification and Low-Oxygen on West Coast Foretells Future for World Oceans

— Posted with permission of SEAFOODNEWS.COM. Please do not republish without their permission. —

Copyright © 2016 Seafoodnews.com

Seafood News


SEAFOODNEWS.COM [UW Today] By Michelle Ma – January 12, 2016

The Pacific Ocean along the West Coast serves as a model for how other areas of the ocean could respond in coming decades as the climate warms and emission of greenhouse gases like carbon dioxide increases. This region — the coastal ocean stretching from British Columbia to Mexico — provides an early warning signal of what to expect as ocean acidification continues and as low-oxygen zones expand.

Now, a panel of scientists from California, Oregon and Washington has examined the dual impacts of ocean acidification and low-oxygen conditions, or hypoxia, on the physiology of fish and invertebrates. The study, published in the January edition of the journal BioScience, takes an in-depth look at how the effects of these stressors can impact organisms such as shellfish and their larvae, as well as organisms that have received less attention so far, including commercially valuable fish and squid.

The results show that ocean acidification and hypoxia combine with other factors, such as rising ocean temperatures, to create serious challenges for marine life. These multiple-stressor effects will likely only increase as ocean conditions worldwide begin resembling those off the West Coast, which naturally expose marine life to stronger low-oxygen and acidification stressors than most other regions of the seas.

“Our research recognizes that these climate change stressors will co-occur, essentially piling on top of one another,” said co-author Terrie Klinger, professor and director of the University of Washington’s School of Marine and Environmental Affairs.

“We know that along the West Coast temperature and acidity are increasing, and at the same time, hypoxia is spreading. Many organisms will be challenged to tolerate these simultaneous stressors, even though they might be able to tolerate individual stressors when they occur on their own.”

Oceans around the world are increasing in acidity as they absorb about a quarter of the carbon dioxide released into the atmosphere each year. This changes the chemistry of the seawater and causes physiological stress to organisms, especially those with calcium carbonate shells or skeletons, such as oysters, mussels and corals.

Hypoxia, on the other hand, is a condition in which ocean waters have very low oxygen levels. At the extreme, hypoxia can result in “dead zones” where mass die-offs of fish and shellfish occur. The waters along the West Coast sometimes experience both ocean acidification and hypoxia simultaneously.

“Along this coast, we have relatively intensified conditions of ocean acidification compared with other places. And at the same time we have hypoxic events that can further stress marine organisms,” Klinger said. “Conditions observed along our coast now are forecast for the global ocean decades in the future. Along the West Coast, it’s as if the future is here now.”

Klinger is co-director of the Washington Ocean Acidification Center based at the UW and served on the West Coast Ocean Acidification and Hypoxia Science Panel, which was convened two years ago to promote coast-wide collaboration and cooperation on science and policy related to these issues.

For this paper, the authors examined dozens of scientific publications that reported physiological responses among marine animals exposed to lower oxygen levels, elevated acidity and other stressors. The studies revealed how physiological changes in marine organisms can lead to changes in animal behavior, biogeography and ecosystem structure, all of which can contribute to broader-scale effects on the marine environment.

The tri-state panel has completed this phase of its work and will wrap things up in the coming months. Among the products already published or planned are a number of scientific publications — including this synthesis piece — as well as resources for policymakers and the general public describing ocean research priorities, monitoring needs and management strategies to sustain marine ecosystems in the face of ocean acidification and hypoxia.

The group’s other papers and findings related to ocean acidification and hypoxia will soon be available on its website.

Co-authors of this paper include George Somero, Jody Beers and Steve Litvin at Stanford University’s Hopkins Marine Station; Francis Chan of Oregon State University; and Tessa Hill of the University of California, Davis.

The research was funded by the California Ocean Protection Council, the California Ocean Science Trust, the Institute for Natural Resources at Oregon State University and the National Science Foundation.


Subscribe to SEAFOODNEWS.COM Read the original post: http://www.seafoodnews.com/Story/1005090/Dual-Impact-of-Ocean-Acidification-and-Low-Oxygen-on-West-Coast-Foretells-Future-for-World-Oceans

Jan 5 2016

A steady conveyor belt of El Niño storms is what has officials concerned

la-me-el-nino-storms-pictures-20160104-044Robert Gauthier / Los Angeles Times  San Dimas Public Works Supervisor Terry Gregory cleears a clogged drain from North San Dimas Canyon Road as heavy rains cause clogged drains and mud flows in San Dimas, Glendora and Azusa.

 

To understand the power and potential dangers of El Niño, look at satellite images of the Pacific Ocean on Sunday.

At least four storms were brewing — the farthest still getting going in Asia — and all aimed at California.

It’s this pattern, a series of back-to-back-to-back storms seemingly arriving on a conveyor belt, that concerns officials bracing for potential damage from the predicted winter of heavy rains.

“El Niño storms: it’s steady, not spectacular. But it’s relentless,” said Bill Patzert, climatologist at NASA’s Jet Propulsion Laboratory in La Cañada Flintridge. “It’s not 10 inches in 24 hours and nothing afterward. It’s a 1-inch storm, a 2-inch storm, followed by a 1-inch storm, followed by a 2-inch storm.

“As this goes on for many weeks, then you start to soak the hillsides — then you get more instability. And then, instead of having 6 inches of mud running down your street or off the hillside behind your house, then you can get serious mudflows — 2 to 3 feet in height.”

This week was the first that the weather pattern associated with El Niño has formed over California this season. A first system Monday didn’t amount to much after it ran into dry air out of the mountains, but three more storms are targeting California on Tuesday, Wednesday and Thursday, Patzert said.

“The next systems seem primed to deliver at least a couple good punches Tuesday and Wednesday, followed by plenty of showers Thursday,” the National Weather Service in Oxnard said in its forecast.

The riskiest areas for this week are areas recently burned by wildfires, such as the Camarillo Springs community in Ventura County, Silverado Canyon in Orange County, and the communities near the Christmas weekend brush fire that burned north of Ventura. Officials are concerned about flash floods in those areas, and a voluntary evacuation advisory is planned for Silverado Canyon, which is recovering from a fire in 2014.

But the worst problems will probably come later in the winter. “This is the first major line of storms. The ground isn’t quite saturated yet,” said meteorologist James Thomas of the National Weather Service in San Diego.

It’s later in the winter that the risk heightens; in Southern California, that’s particularly in neighborhoods and roads below arroyos and canyons and along the beach.

“That’s called, ‘The price you pay with the view,'” Patzert said.

Still, Patzert said, Southern California isn’t expected to encounter the same kind of widespread regional flooding that has hit the South in recent weeks. Although such devastating flooding occurred earlier in the 20th century, the transformation of the Los Angeles, San Gabriel and Santa Ana rivers into concrete-lined flood control channels has protected the region for generations.

Besides this El Niño, there are only two similarly strong El Niños in the record books over the last half-century.

The 1982-83 El Niño caused more than $500 million in property damage in California, which is equivalent to more than $1 billion in today’s dollars, and unleashed flooding and sent mud and rock raining over canyon and coastal roads, destroying the Seal Beach Pier and severely damaging the Santa Monica Pier.

The El Niño of 1997-98 also caused more than $500 million in damage, and 17 people died during those storms. In February 1998, 13.68 inches of rain poured down on Los Angeles — almost a year’s worth of precipitation. That month, two California Highway Patrol officers died in San Luis Obispo County after their car fell into a massive sinkhole as a river eroded a highway; two Pomona College students were killed when a tree slammed into their SUV; and mud pummeled homes in Laguna Beach, crushing homes and killing two men.

The arrival of the El Niño-influenced weather pattern in California comes just as expected, when El Niño’s influence on California weather peaks in January, February and March. A subtropical jet stream that’s normally not well-defined has emerged as a strong force over California. And “when the jet stream is stronger and closer, the storms can maintain their strength or get stronger as they approach California,” Daniel Swain, a climate scientist at Stanford University, said in an interview.

The back-to-back storms means a week not seen since December 2010, the last time a weeklong series of weather systems had a significant effect on Southern California, said Thomas, the San Diego meteorologist. The National Weather Service estimates as much as 2 to 3 inches of rain will fall along the coast of Los Angeles and Orange counties through Thursday — a decent amount, given that the average rainfall for all of January in downtown Los Angeles is about 3 inches.

Through Thursday night, there could be 2 to 4 feet of fresh snow in the San Bernardino Mountains at elevations above 7,000 feet, where Big Bear Lake is. “So that’s significant,” Thomas said. He warned of areas of near zero visibility because of blowing snow from Tuesday afternoon through Thursday night, and gusts of up to 50 mph. “So it’ll be a mess up there.”

Tuesday is expected to be the heaviest storm day for officials monitoring the Solimar fire burn area north of Ventura, which charred more than 1,200 acres over Christmas weekend. Vegetation, once burned, can no longer hold back loose sediment, and officials are worried about mud and debris crashing onto Solimar Beach communities, Pacific Coast Highway and sections of the 101 Freeway all the way up to the Sea Cliff area.

Even half an inch of rain in an hour could create a debris flow in these burn areas, said Gil Zavlodaver of the Ventura County Sheriff’s Office of Emergency Services.

Steven Frasher, a spokesman for the Los Angeles County Department of Public Works, cautioned residents and the homeless to stay out of flood control channels such as the L.A. River and Sepulveda Dam that, in dry times, are popular recreational areas.

“They’re incredibly dangerous,” Frasher said.

“It seems that every time something like this comes through, someone underestimates the power of how much water goes through there,” Frasher said. “This is not the time to use the recreational trails. Certainly don’t go anywhere near rushing water. If you see water on the roadways, don’t go through it. It’s often faster or deeper than you think it is. Not to mention running into debris and stuff like that.”

Officials encourage residents to sign up for emergency alerts and learn more about storm preparation by visiting websites such as www.lacounty.gov/elnino and www.elninola.com for Los Angeles County residents, www.readyventuracounty.org/elnino for Ventura County, www.OCElnino.com for Orange County, www.readysandiego.org/el-nino/ for San Diego County and www.sbcounty.gov/main/elnino.asp for San Bernardino County.


Read the original post: http://www.latimes.com/

Jan 1 2016

Commercial and Recreational Rock Crab and Recreational Dungeness Crab Fisheries Open in Southern Portion of the State

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FOR IMMEDIATE RELEASE – December 31, 2015

Commercial and Recreational Rock Crab and Recreational Dungeness Crab Fisheries Open in Southern Portion of the State

On Dec. 31, 2015, the California Department of Fish and Wildlife (CDFW) and the Fish and Game Commission (Commission) were notified by the director of the Office of Environmental Health Hazard Assessment (OEHHA) that, in consultation with the director of the California Department of Public Health (CDPH), a determination has been made that Dungeness crab and rock crab caught on the mainland coast south of 35° 40′ N latitude (near Piedras Blancas Light Station in San Luis Obispo County) no longer poses a significant human health risk from high levels of domoic acid, and that the fisheries should be opened in a manner consistent with the emergency regulations. This determination was based on extensive sampling conducted by CDPH in close coordination with CDFW and fisheries representatives.

Pursuant to the emergency regulations adopted by the Commission and CDFW on Nov. 5 and 6, respectively, the current open and closed areas are as follows:

Areas open to crab fishing include:
  • Recreational Dungeness and rock crab fisheries along the mainland coast south of 35° 40′ N Latitude (Piedras Blancas Light Station)
  • Commercial rock crab fishery along the mainland coast south of 35° 40′ N Latitude (Piedras Blancas Light Station)
Areas still closed to crab fishing include:
  • Commercial Dungeness crab fishery statewide
  • Recreational Dungeness crab fishery north of 35° 40′ N Latitude (Piedras Blancas Light Station)
  • Commercial and recreational rock crab fisheries north of 35° 40′ N Latitude (Piedras Blancas Light Station)
  • Commercial and recreational rock crab fisheries in state waters around San Miguel, Santa Rosa and Santa Cruz islands

Despite several weeks of samples below alert levels, as a precaution, CDPH and OEHHA recommend that anglers and consumers not eat the viscera (internal organs, also known as “butter” or “guts”) of crabs.

CDPH and OEHHA also recommend that water or broth used to cook whole crabs be discarded, and not used to prepare dishes such as sauces, broths, soups or stews. The viscera usually contain much higher levels of domoic acid than crab body meat. When whole crabs are cooked in liquid, domoic acid may leach from the viscera into the cooking liquid. This precaution is to avoid harm in the unlikely event that some crabs taken from an open area have elevated levels of domoic acid.

CDFW will continue to closely coordinate with CDPH, OEHHA and fisheries representatives to extensively monitor domoic acid levels in Dungeness crab and rock crabs to determine when the fisheries can safely be opened throughout the state.

Links:
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Dec 29 2015

Giant squid surfaces in Japanese harbor

By Euan McKirdy and Junko Ogura, CNN
Tokyo (CNN)
It isn’t every day that a mystery from the deep swims into plain sight. But on Christmas Eve, spectators on a pier in Toyama Bay in central Japan were treated to a rare sighting of a giant squid.

The creature swam under fishing boats and close to the surface of Toyama Bay, better known for its firefly squid, and reportedly hung around the bay for several hours before it was ushered back to open water.

It was captured on video by a submersible camera, and even joined by a diver, Akinobu Kimura, owner of Diving Shop Kaiyu, who swam in close proximity to the red-and-white real-life sea monster.

“My curiosity was way bigger than fear, so I jumped into the water and go close to it,” he told CNN.

“This squid was not damaged and looked lively, spurting ink and trying to entangle his tentacles around me. I guided the squid toward to the ocean, several hundred meters from the area it was found in, and it disappeared into the deep sea.”

Yuki Ikushi, the curator of Uozu Aquarium in Uozu, Toyama, told CNN that there were 16 reports of Architeuthis squid trapped by fishing nets last season, and this one is the first sighting this season, which runs from November to March. “We might see more in this season, but it’s very rare for them to be found swimming around (the fishing boats’) moorings.”

The Toyama squid is a fairly small example of the species, estimated at around 3.7 meters (12.1 feet) long, and may be a juvenile. Giant squid are thought to grow as large as 13 meters (43 feet) long. They typically inhabit deep waters, and it is unclear why this one wandered into the bay.

Sightings of giant squid are extremely rare, and indeed for hundreds of years they were considered no more than a myth. The species was likely the inspiration for the mythological Kraken sea monster, a northern European legend popularized in an eponymous poem by Alfred Tennyson, and the Scylla of Greek mythology.

Recent specimens have been found washed ashore dead, when their bright colors have already faded. The first-ever observations of a giant squid in its natural habitat were made in deep waters in the north Pacific in 2004, and Japanese broadcaster NHK, along with the Discovery Channel filmed the first live adult in 2012.

Oceanographer and squid expert Edie Widder of the Ocean Research and Conservation Association, who was part of the team which first captured the squid on film, told a TED audience in 2013: “How could something that big live in our ocean and remain unfilmed until now?

“We’ve only explored about five percent of our ocean. There are great discoveries to be made down there, fantastic creatures representing millions of years of evolution.”


Read the original post and watch the videos at: http://www.cnn.com/2015/12/28/asia/toyama-japan-giant-squid/

 

Dec 29 2015

Seafood Restaurants Turn to Underutilized, Sustainable Species

The rising trend of “trash fish,” or unusual and underutilized seafood species, on fine dining menus in New York City was discussed last week in The New York Times by Jeff Gordinier. The idea is to, “substitute salmon, tuna, shrimp and cod, much of it endangered and the product of dubious (if not destructive) fishing practices,” with less familiar species that are presumably more abundant, like “dogfish, tilefish, Acadian redfish, porgy, hake, cusk, striped black mullet.”

Changing diners’ perceptions isn’t always easy, especially about seafood, but there is certainly momentum building for more diverse seafood species. Seafood suppliers are reporting record sales of fish like porgy and hake. Chefs feel good about serving these new species because, “industrially harvested tuna, salmon and cod is destroying the environment.” A new organization, Dock-to-Dish, connects restaurants with fishermen that are catching underutilized species and these efforts are highlighted as a catalyst for this growing trash fish trend. From a culinary perspective, this trend allows chefs to sell the story of an unusual and sustainable species, which more compelling than more mainstream species like tuna, salmon or cod. From a sustainability perspective, Gordinier implies that serving a diversity of seafood species is more responsible than the mainstream few that are “industrially caught” and dominate the National Fisheries Institute list of most consumed species in America.

Comment by Ray Hilborn, University of Washington, @hilbornr

While I applaud the desire to eat underutilized species, it seems as if the chefs interviewed don’t know much about sustainable seafood. Below are a few quotes from the article that give the impression that eating traditional species such as tuna, cod, salmon and shrimp is an environmental crime.

“Salmon, tuna, shrimp and cod, much of it endangered and the product of dubious (if not destructive) fishing practices”

“The chef Molly Mitchell, can’t imagine serving industrially harvested tuna or salmon or cod. “You can’t really eat that stuff anymore,” she said. “It’s destroying the environment.”

“Flying them halfway around the world may not count as an ecofriendly gesture, but these oceanic oddities are a far cry from being decimated the way cod has. “Hopefully they’ll try something new and not just those fishes that are overfarmed and overcaught,” said Jenni Hwang, director of marketing for the Chaya Restaurant Group.”

“A growing cadre of chefs, restaurateurs and fishmongers in New York and around the country is taking on the mission of selling wild and local fish whose populations are not threatened with extinction.”

A well educated chef should know that there are plenty of salmon, shrimp, tuna and cod that are healthy, sustainably managed, and either certified by the Marine Stewardship Council or on the Monterey Bay Aquarium Seafood Watch list as best choice or good alternative. There is no reason not to eat these species so long as you know where the salmon, shrimp, tuna or cod comes from.

Second, none of these species is in any way threatened with extinction – some individual stocks may be overfished, but no commercially important species has ever gone extinct or even come close to it. We all hear about the poor state of Gulf of Maine cod but perhaps these Chef’s don’t know that the Barents Sea cod stock is at record abundance levels (4 million tons compared to Gulf of Maine’s estimated 2,500 tons). So the global marketplace for Atlantic cod is going to have a million tons of Barents Sea cod, and less than one thousand tons of Gulf of Maine cod.

Alaska produces hundreds of thousands of tons of sustainable wild salmon — that is both MSC certified and on the Seafood Watch best choice list. Why can’t these Chef’s serve that salmon?

So it is fine for these Chef’s to brag about how sustainable they are (even if they do fly fish half way around the world with a large carbon footprint), but they should know, and advise their customers that there is plenty of sustainable salmon, shrimp, tuna and cod to be served.
Ray Hilborn is a Professor in the School of Aquatic and Fishery Sciences at the University of Washington. Find him on twitter here: @hilbornr


Read the original post: http://cfooduw.org/seafood-restaurants-turn-to-underutilized-sustainable-species/

Dec 27 2015

Dr. Ray Hilborn Responds to NPR: Not All Global Fish Stocks in Decline

saving-seafood-logo
 December 22, 2015 — In a commentary published by CFOOD, Dr. Ray Hilborn, Professor at the School of Aquatic and Fishery Sciences at the University of Washington and author of the book Overfishing: What Everyone Needs to Know,addresses claims made by a recent NPR story that global fish stocks are in decline. According to Dr. Hilborn,the opposite is true for many important global fisheries: stocks in Europe, the United States, Russia, and Japan are actually increasing, while stocks in Australia and parts of Canada remain stable.
 
Fish Stocks Are Declining Worldwide, And Climate Change Is On The Hook.

 
This is the title of a recent NPR posting — again perpetuating a myth that most fish stocks are declining.

 

Let’s look at the basic question: are fish stocks declining? We know a lot about the status of fish stocks in some parts of the world, and very little about the trends in others. We have good data for most developed countries and the major high seas tuna fisheries. These data are assembled and compiled in the RAM Legacy Stock Assessment database, available to the public at www.ramlegacy.org. This database contains trends in abundance for fish stocks comprising about 40% of the global fish catch and includes the majority of stocks from Europe, North America, Japan, Russia, Peru, Chile, Argentina, Australia, New Zealand and South Africa. Major fisheries of the world that are not in the data base are primarily in S. and SE Asia.
The figure below shows the trend in abundance of fish stocks in these different regions.
Clearly not all fish stocks are declining; they are increasing in the Atlantic Ocean (tuna fisheries), European fisheries, both EU (recent increases), and non-EU (Iceland and Norway), Russia and Japan, and US East Coast, Southeast and Gulf, and US West coast.

 

Fish stocks in recent years are stable in Australia, Canadian East Coast, South Africa, and Alaska.
We do see long term declines in Canada’s West Coast, the Indian Ocean (tuna fisheries), New Zealand, Pacific Ocean (tuna fisheries) and South America. A characteristic of each of these regions is that they are late developing fisheries, the Pacific and Indian oceans didn’t see wide scale industrial fishing until much later than the Atlantic Ocean and the decline seen is part of the process of developing new fisheries and is planned. The fish stocks in these regions are healthy as very few of these fish stocks are overfished.

 

For the places we don’t have good data (Africa and Asia), what we do know suggests those areas are seeing significant declines in abundance.

 

So clearly not all fish stocks are in decline-the pattern depends on the region. We can see from the above graph that with good fisheries management, stocks can recover. The NPR story got the big picture wrong, it isn’t climate change that is on the hook, it is the presence of effective fisheries management that determines the trend in abundance of fish stocks.

 

The scientific paper on which the NPR story was produced was much more subtle and did not say that fish stocks were decline – that was invented by the authors of the NPR story. The paper estimated that the recruitment potential of the fisheries was declining, specifically that the number of 1 year old fish per adult fish showed a decline in many regions of the world. Interestingly, the paper identified the N. Atlantic as the region of most concern, but when we look at abundance data, the N. Atlantic is the place we see the most stock rebuilding.

 

The number of 1 year old produced is known as recruitment, and the original paper used the data in the RAM Legacy Stock Assessment database to estimate these trends. The statistics used in the original paper are complex, but we can look quite simply at the trends in recruitment – not the recruitment per spawning adult as done in the paper.
This graph shows the recruitment trend for all stocks in the RAM Legacy Stock Assessment database, with blue the trend if all stocks given the same weight, and red with large stocks giving much more weight. The size of the dots or squares shows the relative number of stocks for which we have data in each year. We do see a clear trend in recruitment decline, with perhaps 10 or 15% decline over the 40 years of available data.

 

Is this decline in recruitment due to climate change? That is one possibility, but it is also possibly due to stocks being fished to lower abundance over that time as seen in the first graph. However, regardless of the reason, this decline is small and fish stocks can easily rebuild if good fisheries management is put in place.

 

Read the commentary from Dr. Hilborn at CFOOD
Dec 27 2015

Seafood Restaurants Cast a Wider Net for Sustainable Fish

 

Michael Chernow doesn’t want people to step inside Seamore’s, his fish-fixated restaurant on the rim of Little Italy, worrying that they’re about to get a heap of science homework dumped onto the table.

“Our goal is not to say: ‘Welcome to Seamore’s School. We’re going to teach you all about sustainable fish,’” said Mr. Chernow, who is also one of the entrepreneurs behind the Meatball Shop chain.

But there is a blackboard. Labeled “Daily Landings,” it covers a wall of the restaurant, operating as a shortcut syllabus for anyone who wants to learn not only what fish are being cooked in the kitchen at Seamore’s, but also what species have been deliciously available for human consumption for centuries: dogfish, tilefish, Acadian redfish, porgy, hake, cusk, striped black mullet.

“Once they see the board, everybody gets pumped,” Mr. Chernow said. “‘Wow, look at all these fish, and I’ve never tasted them before.’”

Over the last decade or so, restaurant diners in this country have become more sophisticated about, and open to, ingredients that used to throw them for a loop: bone marrow, pork belly, sunchokes, orange wine, the ubiquitous kale.

But they’ve remained curiously conservative when it comes to seafood. Salmon, tuna, shrimp and cod, much of it endangered and the product of dubious (if not destructive) fishing practices, dominate one restaurant menu after another.

That is changing, however. A growing cadre of chefs, restaurateurs and fishmongers in New York and around the country is taking on the mission of selling wild and local fish whose populations are not threatened with extinction — as well as the invasive species that do threaten them. And the group has enlisted a special fleet of allies to the cause: the fish themselves.

The way these specialists see it, you can lecture diners about the fate of the oceans, or you can open their minds by stuffing some sea robin into a taco or frying up some crevalle jack for a sandwich, and watching their consciousness shift with each bite.

“What we’ve been trying to do is to take the familiar and infuse it with unfamiliar species,” said Vinny Milburn, an owner and fishmonger at Greenpoint Fish & Lobster Company in Brooklyn, where you won’t find cod but will encounter lionfish, wild blue catfish and almaco jack. “If we put it in tacos, people will buy it and they’ll say: ‘That’s a great fish. I’ve never heard of it.’”

There are fringe benefits for the chefs, too: When an ingredient is less popular, that usually means that it’s less expensive. And figuring out how to conjure up something irresistible out of, say, a bluefish collar helps break cooks out of culinary ruts. “Yeah, it’s a challenge,” the chef Tom Colicchio said. “What do you do with it? I actually like that: It just forces you to be creative.”

Anyone who has taken a beach vacation knows that clam shacks have been frying up the local catch for ages. At the fancier end of things, elite chefs like Mr. Colicchio, Dan Barber, Eric Ripert, Dave Pasternack, David Chang and Kerry Heffernan have made a point of letting people know that bluefin tuna is not the only fish in the sea.

But lately, the idea of casting a wider net has begun spreading to neighborhood spots, diners and national chains like Slapfish, a growing West Coast enterprise that hopes to open a New York City outpost in 2016.

Louis Rozzo, the president of the F. Rozzo & Sons wholesale distributor in New York and a fourth-generation fishmonger, remembers the sort of comments his family used to hear from chefs: “Who’s going to come to an expensive restaurant and order porgy?” Now, porgy, as well as local tilefile and hake, is in high demand.

“I sell more porgies now by far than I ever have, because people are interested in using something different,” Mr. Rozzo said.

There are many different ways of thinking differently, and locally. At Beachcraft, Mr. Colicchio’s new spot in Miami Beach, the menu makes room for wahoo, cobia, queen snapper, Florida clams and Key West shrimp.

Change is not always easy, especially when customers are in vacation-relaxation mode. “It’s hard because you’re in a hotel and people want the usual things,” said Mr. Colicchio, who has resisted suggestions from the owners of the hotel, 1 Hotel South Beach, that he make room on the menu for a safe bet like salmon.

At Rose’s Fine Food in Detroit, the traditional Great Lakes fish fry is given its due with the Wild Man Breakfast, which pairs a pan-fried lobe of brook trout with a plate-blanketing blueberry pancake. Lucy de Parry, who owns the diner with a cousin, the chef Molly Mitchell, can’t imagine serving industrially harvested tuna or salmon or cod. “You can’t really eat that stuff anymore,” she said. “It’s destroying the environment.”

Sticking to local traditions makes sense in the kitchen, since Rose’s Fine Food is meant to celebrate what is grown and fished around Michigan. “We grew up eating brook trout and bluegill and all these little lake fish that our grandpa would catch,” she said. “They’re just there. We kind of roll with what we’ve got.”

Still, many people aren’t even aware that many of these fish exist, or that they are thoroughly edible. Shrimp, salmon and canned tuna alone make up 60 percent of the seafood Americans eat, according to the National Fisheries Institute. (Add the next four species on its list — all usual suspects like tilapia and pollock — and you hit 85 percent.)

Even top chefs find themselves making discoveries that alter the way they think about cooking and nature.

At N/naka, in Los Angeles, the chef Niki Nakayama dreamed of putting together an explicitly Californian rendition of a Japanese kaiseki menu. “The whole philosophy is about showcasing what is close to us,” she said. Much of the produce wound up coming from her own garden, but as she scouted around for seafood that embodied the region’s essence, she came up short. “I kept hitting dead ends,” she said.

Eventually Ms. Nakayama joined forces with Dock to Dish, a coast-to-coast organization that helps local fishermen come to chefs with uncelebrated species that may not otherwise fetch top price in the marketplace — “things I hadn’t seen before,” as she put it. Suddenly, she had at her fingertips whelk-like turban snails and lingcod and ridgeback shrimp and spiny lobster.

She remembers thinking, as the deliveries began to arrive, “Oh, my God, we just landed a treasure chest.”

Arguably no chef in America is more passionate about seafood than Michael Cimarusti, whose flagship restaurant in Los Angeles, Providence, has drawn acclaim for its reverent approach to fish. He is preparing to open Cape Seafood and Provisions, a shop devoted to sustainable seafood. “I feel like the time is right to work on flipping the model,” he said.

He, too, has become a Dock to Dish convert, and in conversation he gets fired up by the challenge of improvising with whatever lands in the kitchen. “I was not necessarily in the market for longspine thornyheads, but that’s what came in one day,” Mr. Cimarusti said, citing a Pacific Coast breed that is colloquially known as “idiot fish.” “We used every part of it. We made a bouillabaisse broth.”

There can be misfires. “It’s sort of trial and error,” he said. “Every fish that we’ve been getting, you’ve got to treat them in different ways.”

The process has changed his way of thinking. “To me there aren’t really many ‘trash fish,’” he said. “They’re just underappreciated, or unrecognized.” (Then again, he draws the line at hagfish. “That stuff’s nasty,” he said. “That comes up like a ball of slime on your hook.”)

Indeed, changing minds sometimes requires a dash of crafty Trojan-horse-style marketing. At Slapfish, which the entrepreneur Andrew Gruel says he wants to turn into “the Chipotle of seafood,” customers come back for “the ultimate fish taco” even though the species of fish inside (hoki, blue catfish, California rockfish) constantly shifts, depending on supply.

“What I do is I get people addicted to the dish and not the fish in the dish,” Mr. Gruel said. He’s also not averse to giving a fish a different name. If “hoki” sounds too obscure or confusing, call it “slapfish.” If people wince at the word “sardines,” may they be more open to his preferred nomenclature: “petite bass”?

Some restaurants go even farther afield to introduce an American audience to species that seem to have been beamed in from other planets. Maiden Lane, in the East Village and in the Urbanspace Vanderbilt market in Midtown, ships in subtle conservas (some of the world’s most elegant canned foods, including stickleback) from countries like Spain, Portugal and Iceland. (A tin of delectable brined cockles from the Ramón Peña company is on the menu for $55.)

At Chaya, in downtown Los Angeles, freakish-looking outliers from Japan like beltfish and red cornet are served to your table in a medley of ways, from sashimi to tempura. Flying them halfway around the world may not count as an eco-friendly gesture, but these oceanic oddities are a far cry from being decimated the way cod has. “Hopefully they’ll try something new and not just those fishes that are overfarmed and overcaught,” said Jenni Hwang, director of marketing for the Chaya Restaurant Group.

At Norman’s Cay, an island-themed restaurant on the Lower East Side of Manhattan, an owner, Ryan Chadwick, hooks customers with a dramatic lure: The place specializes in lionfish, an invasive demon of the sea that is notorious for chowing its way through the Caribbean. Mr. Chadwick encountered lionfish in the Bahamas and got an idea.

After removing the venomous spines, the crew at Norman’s Cay applies the simplest of treatments, cooking it on a grill or in hot oil. “We have people calling the restaurant and they’re waiting for the fish to come in,” he said. “Now we have a supply problem.”

Ultimately, the new emphasis on serving different fish is not really about elbowing eaters out of their comfort zone; it’s about pulling them back into it. Making a delicious dinner from a fish that swims in nearby waters is a way of reconnecting with the region you’re in — and returning to an intimate relationship with the water that goes way back.

Michael Psilakis, the chef whose modernized Greek cuisine can be found in and around New York at spots like MP Taverna and Kefi, looks back to the days in his Long Island childhood when he “spent a ridiculous amount of time on boats fishing with my dad.”

Mr. Psilakis remembers pulling up to a beach and using nets to catch whitebait in the shallows. The tiny wrigglers would be kept in buckets with seawater and taken home to be dredged in flour and crisped in oil like piscine French fries. He remembers catching porgy and watching it cook on the grill.

On certain days, Mr. Psilakis and his team still cook and serve porgy and whitebait just like that at various branches of MP Taverna. “Porgies are so cheap, man,” he said. “It used to be a fish that they would throw out. Nobody wanted to eat a porgy.”

But he has learned that if you want more people to eat porgy, all you have to do is get them to try it.

“When we sell those specials, that story is being told,” he said. “The story not only sells the fish, but the story brings an identity to the fish. Somehow it means something. There’s value to it.”


Read the original post: http://www.nytimes.com

Dec 23 2015

Fish oil turns fat-storage cells into fat-burning cells in mice, study finds

16448534990_43f5fac072_k_1024Photo: Neil Tackaberry/Flickr

Fish oil has long been known to confer a wide range of health benefits, including boosting the cardiovascular system and potentially even treating the effects of schizophrenia. Now a new study from Japan says it could also help people trying to lose weight.

Researchers from Kyoto University found that mice fed on fatty food and fish oil gained considerably less weight and fat than mice that consumed fatty food alone. The findings suggest that fish oil is able to transform fat-storage cells into fat-burning cells – and if the same process occurs in humans, fish oil could help us reduce weight gain, especially as we age, when our fat-burning cells are in lesser supply.

While we might think of our fat tissue as primarily a fat storage system, this isn’t always so. White fat cells store fat, but brown fat cells metabolise fat to maintain a stable body temperature. Our bodies metabolise fat more easily when we’re young, as we have a greater amount of brown fat cells in youth, but we start to lose them in maturity.

Scientists have also discovered a third type of fat cell – beige fat cells – which function much like brown fat cells in mice and people. Also like brown fat cells, the beige cells diminish in number as we get older, making it harder for our bodies to burn fat. This is where fish oil could come into play.

“We knew from previous research that fish oil has tremendous health benefits, including the prevention of fat accumulation,” said food scientist Teruo Kawada from Kyoto University. “We tested whether fish oil and an increase in beige cells could be related.”

To examine the links, the researchers fed one group of mice fatty food, and another group fatty food with fish oil additives. The results, published in Scientific Reports, reveal how the animals that consumed the food with fish oil gained less 5 to 10 percent less weight and 15 to 25 percent less fat – a significant reduction in the circumstances.

But why does this happen? The researchers say that fish oil activates receptors in the digestive tract, which fires up the sympathetic nervous system and induces storage cells to metabolise fat. In other words, the fish oil causes white cells to transform into beige cells, effectively turning fat-storage tissue into fat-metabolising tissue and leading to increased energy expenditure at the expense of weight gain and fat accumulation. This is good to know.

It’s too soon to say whether these findings also apply to humans, but further studies may show just that, which the researchers believe could contribute to an effective treatment for obesity.

“People have long said that food from Japan and the Mediterranean contribute to longevity, but why these cuisines are beneficial was up for debate,” said Kawada. “Now we have better insight into why that may be.”


Read the original post: http://www.sciencealert.com/