Tag Archives: sea food


Fake seagrass help us learn how to save dwindling fish populations

Red snapper

Red snapper

A large amount of New Zealand’s seagrass have been killed by sediments released from land development. The seagrass bed at Whangarei Harbour has for instance been reduced from 14 sq km in the 1960s to virtually non-existant today. And sedimentation this is not a new problem – between 1959 and 1966 Tauranga Harbour lost 90 per cent of its seagrass.

Researchers at New Zealands’s National Institute of Water & Atmospheric Research are now fitting the floor of the Whangapoua Estuary with plastic seagrass in an attempt to show how New Zealand’s fish stocks could be boosted by restoring the seagrass habitats. The “seagrass” consists of plastic fronds attached to wire frames, and the length of the fronds varies from 5 cm to 30 cm.

“We made them with tantalising long blades of artificial grass, the things fish really go for,” says NIWA fisheries ecologist Dr Mark Morrison. “What we found, initially, is that fish are really looking for shelter and seagrasses provide good protection to fish.”

The largest density of fish could be found where the density of seagrass was also at its largest.

Fish is now being tagged to make it possible for the researchers to track both growth rate and survival rate.

¨Lice-eating wrasse reduces environmental impact of salmon farming in Norway

When salmon is farmed in large-scale monocultures, the fish tend to become susceptible to disease and parasites. Researchers working for the organization Nofima have now found a way of combating the parasite salmon lice in fish farms without using any dangerous toxins. Wrasse loves to eat lice, so the researchers simply added wrasse to the salmon populations and the result was astonishing.

During the trials, the most efficient lice eater turned out to be the Ballan wrasse (Labrus bergylta). In addition to being highly efficient, it also gathered lice at lower temperatures than the other Wrasse species that took part in the experiment.

When Ballan wrasse was used, roughly 2-5% wrasse was needed for salmon living in sea cages. This means that a population of 100 000 salmon will need somewhere between 2 000 and 5 000 wrasse to stay deloused. A new larger project will now be prepared to make sure there is an adequate supply of the lice eaters in Norway. The project will go on for three years and has received funding from The Fishery and Aquaculture Industry Research Fund (FHF).

The effort which is now commencing is unique in both a Norwegian and global context. Norway is the only salmon-producing country that is using wrasse on a large scale to combat salmon lice,” says Arne Karlsen, managing director of FHF.

Removing large amounts of Ballan wrasse from the wild to keep in salmon farms could cause serious damage to the wild populations and the goal of the Norwegian project is therefore to cover at least 25% of the demand with farmed wrasse by 2013.

In addition to Nofima and FHF, the project will also involve SINTEF Fisheries and Aquaculture, the Institute of Marine Research and the Norwegian University of Science and Technology.

Several Norwegian projects are already taking a closer look at the Ballan wrasse, including a research venture concerning Ballan wrasse farming that started last year with funding totaling NOK 12 million from the Research Council of Norway, FHF and industry partners.

It is estimated that the total Norwegian effort on Ballan wrasse farming is in the vicinity of NOK 100 million,” says Kjell Maroni, research and development director at FHF

The researchers will now have to find out how to carry out large-scale wrasse farming without being plagued by the same problems with disease and parasites as the salmon farms.



“Dog Salmon” Being Pushed Heavily in British Supermarkets as Christmas Meal

SalmonIt appears that the traditional Turkey and local Salmon have been replaced with imported Brazilian birds and “chum salmon” imported from China. What is really a turn-off for these 5 GBP morsels – known as “Christmas Wild Salmon side with lemon and thyme butter” – is that many Inuit tribes have used this “chum salmon” to feed their dogs, as in not fit for human consumption.

The sudden appearance of “chum salmon” has really shocked shoppers.

You see, farmed salmon – primarily Scottish in origin in years past – has gotten quite pricey, and the chum is the cheaper alternative, being twenty to thirty percent more economical.

A traditional salmon side of 600 grams may run you 10 GBP to 12 GBP, however this “dog salmon” retails for around 5 GBP.

However, it is not just this “dog salmon” which has been hitting the shelves. Many retailers are also opting for foreign bred geese as well, which has the National Farmers’ Union in an uproar.

“There is concern about how much food is coming in from overseas for Christmas – particularly when it’s dressed up as a traditional product and can quite easily be misleading,” fumed head of the NFU’s food chain unit, Lee Woodger.
“British farmers pride themselves on the quality of the food they produce, both in terms of the environmental and welfare standards, and traceability.
“Consumers can only get a 100 per cent guarantee on where food is farmed, produced and packaged if they see the tractor logo with a Union Jack on the packaging.”

That being said, the cheaper alternatives are sure to be the norm this Christmas, what with the current economic crisis the world over.

Shark Fin Soup Warms Bellies: Gives Stars To Sun Tung Lok

Shark fins

Shark fins

A high class restaurant situated in Tsim Sha Tsui, the Sun Tung Lok – which also happens to be very famous for its shark fin soup – has just gotten the honor of being the first restaurant, not part of a hotel, to be given three Michelin stars.

“After no less than eight visits in the past year by our inspectors, we decided that with its new chef, Joe Chan, the restaurant was a three star,” director of Michelin guides, Jean-Luc Naret explained.
“The chef has visited different parts of the mainland and incorporated ideas into the menu.”

Roughly eighty percent of the menu is Cantonese, which stems to include stuffed crab shell, roast suckling pig and beef rib with house gravy.

The price of the succulent shark fin soup ranges from $20 USD to $650.

The group of caterers opened up their branch in Tsim Sha Tsui four decades after the grand opening of their first restaurant in Happy Valley.

The soup has been popular amongst rather famous patrons of the restaurant such as Stanly Ho Hung-Sun, casino mogul, Lee Heung-kam, an actress, and Alex Fong Lik-sun, a singer.

A food critic and chef from Hong Kong, Lau Kin-Wai, has commented that the Sun Tung Lok deserves the highest rating as the quality of the soup is outstanding, and of course the innovative menu as well.

However, the soup is not sitting well with conservationist groups such as the WWF and PETA. The WWF has commented that is is rather disappointed for the three star rating, as it is rewarding bad behavior.

“Since the Michelin Guide is popular with diners, it may induce more shark fin consumption and further impact marine ecosystems,” a spokeswoman commented.

International Accord Fails: BlueFin Tuna In Dire Straights Due to Overfishing

Tuna

Yellowfin tuna, Thunnus albacares

The International Commission for the Conservation of Atlantic Tuna did not accept the idea of reducing fishing of the Atlantic bluefin, whose populations have been declining for the past few decades from fishing pressure and, who could forget, the BP oil spill fiasco in the Gulf of Mexico. With the bluefin heading towards certain doom, the Center for Biological Diversity in May called for more protection, and invoked the U.S. Endangered Species Act. The decision to not reduce the international catch quotas by the commission means that the survival of the bluefin is riding very heavily on the U.S. Endangered Species Act.

“The international tuna commission had an opportunity to take bluefin tuna off the path to extinction but didn’t. Instead, the commission ignored years of scientific evidence about the perilous decline of bluefin tuna and chose to allow fishing to continue as if nothing is wrong,” commented a staff attorney at the Center, Catherine Kilduff.

Ever since 1969, when the international commission first came into being, the bluefin tuna – which was once very abundant – has been fished almost to the point of being extinct. The commission has set 2011 catch quotas of 12,900 tons, and 1,750 tons for the two different stocks of bluefin tuna: the Mediterranean and eastern Atlantic stock and the western Atlantic stock. The quotas have dipped a little, but not enough. They came down from 13,500 tons and 1,800 tons respectively. That is a step in the right direction, but not enough to help the bluefin regain a toehold in the world.

“This level of fishing pressure sentences bluefin tuna to yet another decade of depletion,” Kilduff explained. “The fishing quotas adopted today bank on overly optimistic conditions for tuna recovery so that fishermen can continue to catch the prized bluefin tuna as they have in past years. As the Gulf of Mexico oil spill shows, bluefin face more threats than just fishing.”

Case Study: BP Oil Spill Take Toll on Bluefin Tuna, Satellites Don’t Lie!

The BP oil spill fiasco of the Gulf Of Mexico couldn’t have come at a worse time for bluefin tuna: they had recently just made their way into the Gulf – where they generally went to try and mate – to get jiggy with it and make a bunch of little bluefin. Satellites have been keeping an eye on things, and have been a great asset in determining what damage has been done to the bluefin’s spawning grounds.

The amazing Atlantic bluefin tuna, some of the largest of this species of fish can be as large as a Volkswagon Beetle, make their way to the Gulf every year from January until June. The peak time when they spawn is about mid April to May – just as BP was giving out free samples of its precious oil, when the well they had exploded and started pumping thousands of gallons of crude into the area this past April 20th.

This fish, which is paramount to commercial markets everywhere, mate in the surface waters, the females lay their eggs and the males fertilize away behind them. The oil present could cause harm to the eggs, larva and even the adults in the area. To make matters worse, the Atlantic tuna populations of the world have seen a drastic decline of 82% over the past three decades, so it is extremely important that they be allowed to mate without interruption.

Well, great job BP.. You really did cause quite the disturbances… How would they like it if we dumped oil into their beds as they were getting in the mood?

¨Hunters Becoming the Hunted: Lionfish Role Reversal!

Lionfish

Lionfish photo by Jens Petersen

The Ministry of Agriculture and Fisheries in Jamaica is taking some drastic measures to help prevent the collapse of the marine fisheries. They are now promoting lionfish as being a tasty treat for any menu. This effort is to help control the explosive growth of the lionfish population.

Officials have said that the nation’s marine biodiversity, its food security and economic well-being are all at risk.

“The situation in Jamaica is urgent,” commented the national coordinator for the Jamaican component of a Caribbean-wide Invasive Alien Species Project at the National Environment and Planning Agency, Nelsa English.

“A lack of sufficient natural predators suggests that it (lionfish) could be a potentially significant threat to Jamaica’s biodiversity and the ecosystem in general,” she added.

The marine resources of Jamaica are stretched dangerously thin, its reefs are being exploited to the point of extinction, and the fishing practices being used are detrimental to the environment. Some people even go as far as to use explosives to bring up their fish! Those that don’t often use toxic chemicals and nets whose mesh is illegally small.

Researchers have agreed that many of the once majestic reefs have been decimated to becoming mere communities of coral, and no longer operate as complete ecosystems due to the lack of diversity that calls them home.

Well seems to me that lionfish are part of the problem, and Jamaica has the answer. They are following suit as other nations are frying them up, putting them in sandwiches or using them as a pizza topping.

Oceans Are Becoming Overcrowded, Salmon In Danger, B.C Scientists Fear Worst

Salmon fry

The wild salmon of the North Pacific are becoming fewer in number as they are being forced to fight for their food and rapidly declining living space, as billions of farmed salmon are being released into the oceans every year, a study by researchers out of B.C. and Washington State explains.

The concern is coming from the fact that the salmon populations, mainly of the sockeye, pink and chum variety, across the Pacific Rim is much higher than usual.

“The total number of salmon out there is at an all-time high, in fact, the abundance is about double what it was in the 1950s,” commented a fisheries management scientist at Simon Fraser University, Randall Peterman, who is also a co-author of the newly published report.

Releasing a huge amount of artificially grown salmon to help and supply a food fishery is detrimental to the native salmon, he explains. “Hatchery fish have been causing deterioration in the wild population for some time.”

“The fact is that hatchery fish from one nation can influence the health of salmon stocks in another nation,” Peterman explains. The amount that these hatcheries release, especially in Alaska and Japan, has reached a level of an astounding five billion salmon a year and it’s continuing to increase. Which means that the salmon are under imminent threat.

First it’s overfishing, now it’s over fish releasing? Well I have an answer for you boys, grab the frying pan, it’s time for a fish fry…

Despite Oil Spill, Fish Fry Showing up In Record Numbers in Gulf of Mexico

Red snapper

Red snapper

Snapper fry are all over the place. There are also trout, grunt and grouper fry all over the place as well. The early tabulation of the annual count in the beds of grass spattered about the northern part of the Gulf of Mexico seems to suggest that the larvae of some kinds of fish have survived the BP oil fiasco, and what’s more, there are swarms of them.

“My preliminary assessment, it looks good, it looks like we dodged a bullet. In terms of the numbers of baby snapper and other species present in the grass beds, things look right,” commented a scientist with the University of North Carolina’s Institute of Marine Science, Joel Fodrie, who has been actively involved in the study of seagrass meadows along the coast for the past five years.

Joel’s group has taken samples of the different sea life in the grass beds in Alabama, Mississippi, and the Florida Panhandle. They will be taking a sample from around Louisiana’s Chandeleur Islands come this Autumn.

Back at the height of the fiasco, when a seemingly endless stream of oil was floating about on the surface, researchers were most concerned as to whether the trillions of larvae which hatch each spring offshore would survive the severe contamination of the spill.
It’s looking like they did, and it’s a good thing too. It just goes to show you that mother nature is more resilient than we give her credit for. There is hope yet for the Gulf to make a full recovery, and that folks, is good news indeed.

Metro Markets to Stop the Sale of Fish Which are Endangered:

Metro store

Metro store

The famous operator of supermarkets, Metro Inc., has united with other big name food, retailers such as Loblaws and Walmart, to help adopt a sustainable fisheries policy, whereby it will stop selling those species of fish which are deemed to be at risk, or endangered.

“Starting today, Metro will temporarily withdraw seven threatened species,” the Quebec-based chain commented in a statement released this past Thursday.

The different kinds of fish set to be removed from the shelves include: Atlantic cod, bluefin tuna, orange roughy, Chilean seabass, New Zealand hoki, skate and shark.

“These species will be substituted with other products and might be reintroduced in the future if scientific reports indicate that their stocks have climbed back up to acceptable levels,” Metro explained.

Metro is instituting this new policy slowly, so as to not completely shock their consumers. They expect to have the policy in full swing in stores across Ontario and Quebec by the end of June 2011.

This policy means that Metro will only be offering fresh and frozen, wild and farmed seafood products which are not on the endangered list, and come from fisheries which are sustainable. It also means that all their suppliers will need to sign a code of conduct, and agree to abide by the new policy when selling products for resale.

“To facilitate the traceability of its seafood products, Metro has developed a new, more transparent labelling system to help consumers make informed choices,” it added.

It’s nice to see big businesses willing to put a bit of pressure on the fisheries to look after the health of our worlds’ oceans. Hopefully this will spur other large organizations to do the same, and the sea will be a happier place.