So how is this kind of thing possible? How can female sharks breed without men?
Is there a reproductive form we don’t know?
Scientists meet a newborn puppy in the Shreveport aquarium full of female sharks.
In addition, researchers, 8 months before the birth of the egg left about the shark of the egg can not be sure. But the biggest riddle in this event is that all sharks in the aquarium are female. So there’s no man. Well, how does this birth take place?
As most of us know, there are two main types of reproduction in the animals realm. Sexual and sexual reproduction. Sexual reproduction, combining genetics from two parents, one of which is a male obstruction female.
So in this way, pups with a mixture of both parents’ DNA are born. In addition, the genetic diversity of the breeds increases in this form.
But the proponent of this, the sexual reproduction requires only the existence of a parent, and genetically one -to -one puppies emerge.
In fact, this formula; It is more common in organisms such as sea stars, bacteria and some reptiles. In addition, populations grow in a much more rapid form through this reproduction. However, it is not possible to say that genetic diversity is high.
Researchers offer two possibilities for the offspring in the ShrevePort aquarium. The first one of which gives birth to the puppy, sperm for years to hide the delayed sexual reproduction.
In fact, this style can be a reproductive system because female sharks have oval glands that can store sperm left by a male. In addition, this is a useful reproductive state.
Because the circumstances for the survival of the dogs of the sharks that are born are not always favorable. Females can also ensure that the eggs are fertilized and the delay of birth when the conditions are unfavorable.
Another possibility is Partenogenesis.
Parthenogenesis is a small type of sexual reproduction in which an unpredictable egg transformed into an embryo. Although it is quite common in insects, crustaceans and reptiles, it is actually seen in sharks.
But nowadays it remains unclear whether the birth of the ShrevePort aquarium is realized by delayed fertilization or by parthenogenesis. In summary, female sharks can give birth to the puppy in these two ways without the need for a random man.
