- 3 November 2006 at 7:23 pm #7018
We know of plenty of problems with our local waters and fisheries – sharks now rare, large fish of any kind hard to find, average fish caught not much longer than a dollar coin is wide… But, problems with ocean resources are global, as confirmed by new report, due to be published in tomorrow’s Science, but in media today, inc National Geographic site:Quote:Unless humans act now, seafood may disappear by 2048, concludes the lead author of a new study that paints a grim picture for ocean and human health. According to the study, the loss of ocean biodiversity is accelerating, and 29 percent of the seafood species humans consume have already crashed. If the long-term trend continues, in 30 years there will be little or no seafood available for sustainable harvest. … The increasing pace of diversity loss thus imperils the "ecosystems services" that many human populations depend on for survival, the study says. The research also found that biodiversity loss is tightly linked to declining water quality, harmful algal blooms, ocean dead zones, fish kills, and coastal flooding… "Biodiversity is a finite resource, and we are going to end up with nothing left … if nothing changes," said Boris Worm, an assistant professor of marine conservation biology at Dalhousie University in Halifax, Canada. … But areas managed for improved biodiversity can and do recover, Worm says, raising the possibility that the trend can be reversed if humans take action. "Where we [protect marine areas] around the worldâ€”from the tropics to temperate ecosystemsâ€”we see an increase in species diversity and productivity and stability and economic revenue from those ecosystems," he said. … Donald Boesch at the University of Maryland Center for Environmental Science in Cambridge is not convinced. In a Science news article on the study, he said "it falls short of demonstrating that biodiversity losses are the primary drivers of why the services have declined."8 November 2006 at 7:59 pm #7991
Press release from Worldwatch:
Low-Impact Fish Farming and Eating Lower on the Food Chain Can Provide More Jobs and Increase Seafood Quality and Safety
Washington, D.C. â€” The worldâ€™s beleaguered fish populations have found an unlikely ally: seafood eaters, according to a new Worldwatch study by Brian Halweil, a senior researcher and globally recognized food expert. From Chinese universities that refuse to serve shark fin soup, to U.S. supermarkets that feature sustainably harvested shrimp, to Japanese consumers who are restoring wild oyster beds, a well-informed population of seafood eaters, distributors, restaurants, and supermarkets is playing a growing role in fostering a more sustainable, lower-impact fishing industry.
â€œToday, most of the worldâ€™s seafood, from tuna to salmon to bay scallops, is threatened with extinction,â€ writes Halweil in Catch of the Day: Choosing Seafood for Healthier Oceans. Studies show that fishers have eliminated at least 90 percent of tuna, marlin, swordfish, and other large predatory fish in just the past 50 years, and United Nations surveys show that roughly two-thirds of the worldâ€™s major fish stocks, from cod to salmon to mackerel, have been pushed to the verge of collapse. â€œA public that better understands the state of the worldâ€™s oceans can be a driving force in helping governments pass legislation to ban destructive fishing, mandate fishing labels that indicate how fish were caught, and create marine preserves off-limits to fishing where fish can spawn.â€
But this growing movement is still fragile, Halweil notes. The commitments of many participants, from retail giant Wal-Mart to the Red Lobster restaurant chain, remain incomplete. For instance, Wal-Martâ€™s recent pledge to sell only certified sustainable fish in the next 3â€“ 5 years involves no commitments with respect to farmed salmon and Asian-farmed shrimp, which constitute the bulk of its seafood sales. And endangered swordfish, Atlantic cod, and Chilean sea bass are making a comeback on some restaurant menus as chefs forget earlier campaigns to protect them.
The rapid decline of marine life is largely a result of increased seafood consumption and the use of high-impact fishing technology, which not only raises yields, but also requires about 12.5 times as much energy to catch fish as the fish provide to those who eat them, explains Halweil. He notes that the United States, Europe, and Japanâ€”the worldâ€™s largest seafood consumersâ€”receive most of their seafood through large distributors, restaurants, and supermarkets, so changes in buying habits in these channels could have a profound impact on the health of todayâ€™s fish stocks.
â€œIn the same way the organic food movement is evolving beyond the culinary fringe, sustainable seafood can make its biggest impact when it starts appearing at popular supermarkets and restaurants,â€ says Halweil. â€œFish is an incredibly healthful food, but weâ€™ll need to eat less of certain kinds and more of others if we want fish in the future.â€ Salmon farms, for instance, consume more fish in the form of feed than they yield in seafood, and large ocean species like tuna and swordfish are most likely to be contaminated with mercury and other toxins. Eating clams, oysters, and smaller species, in contrast, puts less strain on oceans and protects consumers from contaminants.
Recalling the success of the â€œdolphin-safeâ€ tuna campaign of the 1980s, Catch of the Day draws attention to a wellspring of private initiatives that are helping to save marine lifeâ€”from color-coded seafood selection guides to targeted purchasing by large seafood buyers like pioneering restaurant company Bon AppÃ©tit. These efforts are boosting the sales and reputations of participating companies, protecting jobs in developing countries where seafood is the dominant industry, and increasing the overall quality and safety of fish products worldwide.
â€œSome scientists predict that if current trends continue, the oceans will be reduced to a trawler-scraped wasteland inhabited primarily by sea slime and jellyfish,â€ Halweil notes. â€œThe fishing industry and fisheries regulators have spent decades trying to prevent this grim outcome, but they have largely failed. Whether it is helping a marine conservation group push through laws prohibiting deep-sea trawling or supporting more restrictive trade in endangered species, seafood shoppers can help reverse the damages humans have created and preserve the fresh catch of tomorrow.â€
Conscientious Seafood Buyers May Be Greatest Hope to Reverse Widespread Destruction of Fisheries1 April 2007 at 6:09 am #7992
More info from Earthwatch, inc a short online video, at:
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