Pesce di acqua dolce, in Francia l'Anses sconsiglia il consumo frequente per l'eccesso di Policlorobifenile. La Francia sconsiglia il consumo di alcuni pesci di fiume perchè sono troppo inquinati.
La notizia è stata diffusa dall’Agenzia nazionale francese di sicurezza sanitaria dell’alimentazione, dell’ambiente e del lavoro (Anses) e riguarda uno studio durato più di tre anni, finalizzato ad identificare le cause delle eccessive concentrazioni nel sangue di Policlorobifenili (PCB), responsabili di effetti avversi nello sviluppo dei bambini esposti durante la gravidanza e l’allattamento. Tracking Tuna in the Cloud. Note: This is a guest post from Lee Crockett, Director of Federal Fisheries Policy at the Pew Environment Group Several months ago, I wrote about a study showing that Atlantic bluefin tuna were being caught at a rate much higher than scientists recommended and regulations allowed.
Furthermore, fishermen were not reporting their catches to the International Commission for the Conservation of Atlantic Tunas (ICCAT), the body that manages tuna in the Atlantic Ocean. This underreporting undermines measures designed to rebuild bluefin populations and threatens the species’ recovery. Thankfully for bluefin tuna and those who care about their survival, ICCAT’s member nations acted decisively at their annual meeting last November to help crack down on unreported fishing. They agreed to implement an electronic bluefin catch documentation (eBCD) system that will replace the paper-based one and help close loopholes. Related Stories: World’s Largest Tuna Conservation Coalition Bans Shark Finning. Do fish have feelings too? It's a slippery question for science. By Michael Hanlon Updated: 10:35 GMT, 8 March 2010 The catch for anglers: A new book claims that fish might feel pain To many, the notion that we should care about the suffering of fish seems absurd.
For most, fish amount to little more than swimming protein, a healthy food to be plucked from rivers and seas. But, as a disturbing new book shows, scientists are now confident that fish, once symbolic of dumb, primitive stupidity, do not only feel pain, but have a complex emotional life, too. Indeed, as the book's author says, there is 'no logical reason why we should not extend to fish the same welfare considerations that we currently extend to birds and mammals'. Do Fish Feel Pain? But Victoria Braithwaite's conclusion is particularly surprising, because we are not used to thinking about fish as sentient at all.
After all, many 'vegetarians' eat fish, apparently convinced that a salmon is more like a lettuce than a lamb. When the results were published in 2003, they created a media storm. World's oceans get an acid bath. Among the repercussions of global climate change, the effect of ocean acidification on marine life is one of the least-understood variables.
The oceans have already absorbed about one-third of the 500 billion tons of carbon dioxide that human activity has added to the atmosphere since the industrial revolution. Absorbing carbon dioxide reduces the pH of seawater, indicating an increase in its acidity. While more attention has been focused on the ecological fragility of coral reefs, cold-water life in other regions -- from urchins and sea-stars to tiny plankton-like copepods -- may be more at risk than their warmer-water counterparts, according to information presented at the American Association for the Advancement of Science annual meeting in Vancouver. Like many effects of climate change, the impacts of acidification can vary from place to place. Hall-Spencer has studied volcanic vents in Italy, California and Papua New Guinea. "Experimental evolution is not a crystal ball. Tiny shrimp leave giant carbon footprint: scientist. Measured by environmental impact, a humble shrimp cocktail could be the most costly part of a typical restaurant meal, scientists said Friday.
If the seafood is produced on a typical Asian fish farm, a 100-gram (3.5 ounce) serving "has an ecosystem carbon footprint of an astounding 198 kilograms (436 pounds) of CO2," biologist J. Boone Kauffman said. A one-pound (454-gram) bag of frozen shrimp produces one ton of carbon dioxide, said Kauffman, who is based at Oregon State University and conducts research in Indonesia. He told a meeting of the American Association for the Advancement of Science that he developed the comparison to help the public understand the environmental impact of land use decisions. Kauffman said 50 to 60 percent of shrimp farms are located in tidal zones in Asian countries, mostly on cleared mangrove forests. After abandonment, the soil takes 35 to 40 years to recover, he said. Explore further: Ancient Aleuts and large-scale environmental events in the global north. Video pedia World - BBC South Pacific S01E06 Fragile Paradise 720p 04. Allarme tonno: secondo uno studio condotto a livello internazionale in 50 anni la diminuzione è arrivata al 60%
I tonni e gli sgombri stanno sparendo.
Da più di 50 anni li si pesca senza limiti, in modo più o meno legale, al punto che, rispetto a mezzo secolo fa, le loro popolazioni sono diminuite, in media, del 60%. Sono drammatici i numeri contenuti in uno studio internazionale pubblicato su PNAS da un gruppo di biologi canadesi ed europei.