The researchers were funded by the animal kingdom, as long as humanity has made its first appearance confusion on the ground. Let's face it, people think through not only known for their intelligence and ability, but also for their natural curiosity. Such an interest in their environment is responsible for the amount of knowledge that has spread over the generations, for the words spoken or written. One of the many secrets and mysteries of the human mind, this is a "Can sharkSpecies survive by parthenogenesis? "
The second issue, which comes from the first, is: "What is parthenogenesis, anyway?" Well, we answer a question at a time and start from the beginning. Over the years, scientists have studied animal life in all its splendor. Although they have learned, acquired and shared a lot of knowledge about how the secrets of parthenogenesis are still among those who have mocked his unquenchable spirit.
Parthenogenesis is the processfor some species such as: invertebrates, fish, reptiles, birds and sharks reproduce without fertilization by a male can. Actually there were two cases of sharks in captivity in aquariums are born without the presence of a man.
In fact, this form of asexual reproduction was observed in 2001 and 2002. On 14 December 2001, a seven-inch long shark pup was born in a home tank for three adult female hammerhead sharks Henry Doorly ZooNebraska. Unfortunately, the poor child was killed within three days after his birth. The alleged author was a stingray. At the autopsy it was discovered that the DNA found only one of the women and that their genetic code was half the usual, as they contain male DNA.
Another example of parthenogenesis is the case, with the birth of two white sharks patches of bamboo has surprised the staff Aquarium Belle Isle in Detroit. As usual, he discovered the two women - whiteBamboo sharks replacement of the tank were to lay their eggs. Since the males do not fertilize, to be disposed of eggs, the staff is usually on them. On this occasion, he decided, after hearing about the Henry Doorly Zoo, an employee against this practice. Shocked, they witnessed the birth of two boys, 15 weeks later.
While some species of shark parthenogenesis may help to survive, the XY chromosome, which is based on their DNA can only females (XX production) individuals to threaten the malePopulation. After the birth of little baby hammerhead shark has a different problem. It is possible for female sharks without male sperm fertilize their eggs to save later? Can some shark species are hermaphroditic, that both male and female organs and the ability to fertilize their own eggs?
Shark species can survive with parthenogenesis? With the newly acquired knowledge, I invite you to answer the question, but to be honest, scientists are stillStudy this option! What do you think?
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