The American scientists confirmed a second case of shark that does not need the male to reproduce. In a study published today in the Magazine of Marine Biology, the scientists say that the DNA tests realised in a young of a shark black end of the Center Marine and Scientific Aquarius of Virginia, in the United States, demonstrated that it did not contain genetic matter of a male.

The first case of asexual reproduction, or parthenogenesis, between sharks was discovered in a shark young Hammer, in Nebraska, the United States. Demian Chapman, an expert scientist in sharks and main author of the second study, said that it is possible that the females shark of many species can obtain this in some occasion.

Differences. The sharks of the aquarium that reproduced without males gave light to only one raises, whereas some species of sharks can produce a dozen of young more or. The scientists warned that the rare births would not have to be considered like a possible solution the decreasing population of sharks.

Many probabilities that do not exist a small number of surviving females could quickly increase the population through this system, said Chapman.

The medical mystery began 16 months ago, after the death of a female shark black end called Tidbit, in the aquarium of Virginia Beach. Any male shark of that species did not exist during its eight years in the aquarium.

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