The Cod Fish the loyal friend of the Portuguese people, may be in danger
The mystery of Arctic cod is solved. Amundsen, the ice-breaker which carries out scientific research in the Arctic Ocean, solved the mystery of the disappearance of cods.
Canada 06/10/2004 - The team of Amundsen, the Canadian ice-breaker of research which has furrowed the Arctic for 10 months, solved the mystery of the disappearance of Arctic cod. The solution rests at the ocean floor to 230 meters under the ice, announced Louis Fortier, biologist member of the crew, at the time of the 4th world Conference of the scientific journalists, which is taken place from the 4 to October 8 in Montreal. Party to study the effects of the climatic reheating on the Arctic, the boat returns of its mission Friday to Quebec.
Up to now, the quantities of cods found in the stomach of its predatory did not correspond to the quantities of fish measured in water "We should have found 30 times more cods in the ocean" explains Louis Fortier, who is a also professor at the Laval University, in Quebec. Where thus did the fish pass which the animals ingurgitent without the knowledge of the scientists?
Answer: at the fine ocean floor where the probes of Amundsen detected well piled up fish "the layers are so dense that the apparatuses panic and confuse them with sea-beds" declares the biologist. The cods probably followed their food, according to the researcher. They consume and reproduce at this place "For us, it is from now on a solved enigma" concluded the biologist.
Moreover, the team of Amundsen noted with surprise that the ice does not prevent the exchanges of CO2 between the ocean and the atmosphere. Although in winter, no biological activity comes to request CO2 of the air, the ice-barrier continues to breathe. Twenty milligrams of CO2 per square meters are absorbed in winter. Paid to the surface of the Arctic, that constitutes 7% of the world carbon dioxide emissions, calculates Louis Fortier. "One sees well that the directives of the protocol of Kyoto are not enough", regrets the biologist, worried by the consequences of the climatic reheating on the Arctic. It already made besides its mourning of the polar bear, "reduced survive in the zoos or the banks of ADN, from here less than one hundred years". Isabelle Masingue Category of this article: Life sciences Last modification: 07/10/2004
Received from José-Manuel de Oliveira, Genève Suisse