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African coelacanths are too old. Archaeological evidence suggests that some 400 million years passed, and scientists believe that it lasted until 1938, when the archaeologist Marjorie Courtenay-Latimer he saw it alive in the fishing net.
It is found on the southeast coast of Africa, he recited they also live longer – scientists are skeptical about 50 years. But proving that life expectancy has been difficult. (Coelacanths are endangered and accustomed to deep water, which is why scientists can’t just put their babies in the tank and start over time.) Now a French research team looking at their scales with bright light has confirmed that they can survive, much longer. “We were amazed,” says Bruno Ernande, a marine biologist who leads the study. He says, “this new life” was about a hundred years old. “
His team from the French Institute for the Exploitation of the Sea, or IFREMER, did not find that people could live about 100 years and that they had a minimum of five years of age, and that they could not mature sexually until they were 40 years old. Results published Thursday in Modern Biology. The slow pace of life underscores the importance of caring for countless ecosystems, which are known to be “at high risk” IUCN Red List. Only about 1,000 are found in the wild, and prolonged delivery and early maturation are bad news for people to have the courage to run with humans. “I’m in greater danger than we ever thought possible,” Ernande said.
“It will have far-reaching consequences,” admits Daniel Pauly, a sociologist at the University of British Columbia, who did not participate in the study. Pauly is the creator of FishBase, a natural and biological repository for thousands of species. If a fish takes decades to ripen, then killing it undermines its ability to reproduce. “A fish that needs 50 years to mature, in contrast to 10 years, is also five times more likely to get into trouble,” he says.
Coelacanths is thick scales that grow up to two inches, and for many years medical experts have been discussing how to calculate those scales at birth signs. In the 1970s, researchers found small reading studios. He thought the rings were a sign of age, like tree rings. They disagreed, however, on how to calculate: Some think that each sign means one year; some believe that a seasonal eruption produces two rings a year. At the time, successful speculation set the stage for a life of almost 22 years. This, which means the 6-foot coelacanth, 200-pound 17-year-old, means they grow very fast: “They will grow as fast as tuna, which is crazy,” he said. Pauly.
It’s crazy because these are slow-moving animals, which should show slow growth. Coelacanths’ hemoglobin is altered by this process, which means that it will not take in enough oxygen to support the rapidly growing fish. Some claim that their small lips are another proof of the inability to breathe. They also live sedentary lives, resting for several days in caves and sleeping slowly west coast, Down to 650 feet and down, when he sees that he wants to walk. “Suddenly, the creatures point to a lifeless fish,” says Ernande.
In addition, scientists who follow coelacanth life have known that 20 years is the lowest. In the 1980’s, researchers began sending submarines and distant vehicles to a cave with 300 or 400 coelacanths. They returned to this place for more than 20 years. On each visit, they recognized the people with their white notes. About three to four fish in this group die, and a new number is born each year. This provided clear evidence that coelacanths live for many years – even more than 100 years, this research contradicts.
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