Pictured shows one of Mary's women as an adult.
Credit: © Dr. Laura Dean
Adhesive small fish (Gasterosteus aculeatus) seems to have been named "Mary" to bite across a large reproduction split on an evolving life tree. Sticky women, like most female fish, place incredible eggs that males will fertilize them in the nest. But Mary, somehow, was pregnant with a healthy healthy living, which survived through section C.
This is the third time that scientists have found eggs that lay eggs without developing embryos in their belly, and the researchers said in a paper published yesterday (February 20) in the journal Nature Scientific Reports. But here is the first time for those embryos to be developed and developed and healthy adults
"Although this is almost accidentally finding a very rare phenomenon, it could help us to understand really important change that has happened throughout the tree of life," Andrew MacColl, an evolutionary biologist and part of the team in He found the discovery in Nottingham in England, he said in a statement. "Most animals place eggs, but some (including almost all mammals, but a few fish) keep their eggs inside and give birth to a young person. This seems to be a difficult thing to achieve in evolution, it seems that this little fish is almost in itself. " [Photos: The Freakiest-Looking Fish]
Researchers are not sure exactly how Mary, who is now dead, has become pregnant like this, given that both strips do not have sex with each other. One possibility was that she had cloned herself, and another was that she was hermaphrodite and thus fertilized her own eggs. But genetic analysis revealed that her babies had two parents apart.
Their best perseverance is that Mair has turned into a nest where men had recently sprayed a cremice of sperm to fertilize ordinary loose eggs that were already there. In some way, some sperm must have traveled up the Mary's egg tube and fertilize the eggs in it.
Although these embryos are healthy, it's probably not a good experience for Mary. When researchers found it (as part of the existing research in egg sticker strips in Scotland), she was late with her young that she was "close to death, "he said.
The researchers euthanized Mary with drugs before "destroying her brain" according to animal welfare regulations. Then, she opened and she pulled her eggs, 56 of them surviving up to an adult at a laboratory aquarium. Thirteen are still living three years later, according to the researchers.
Part of what makes such a discovery is so remarkable, the researchers said, is that normal family transportation fathers have a necessary role in the development of eggs beyond the delivery of sperm. After taking an egg nest, dads encourage them with their toes as the eggs develop, stimulating healthy development. It seems that something about the environment inside Mary has done that work as well. [The 7 Biggest Mysteries of the Human Body]
One of the two previous examples of fish found in this condition was also a rotation in the 1950's, although its embryos were not introduced and little about the way they formed. According to the statement, these researchers are now "looking active" for more strips in similar situations during their trips to the Scottish waters.
If they find more examples, it's a big deal. It is known that several animals, including several fish, have developed the ability to give birth to a young person independently. Perhaps this is a window into the way that evolutionist protocol occurs.
Originally published on Living Science.