Secrets of the Evolution of Ancient Fish

Scientists were able to decipher the genome of  the coelacanth - a fossil fish that has not changed over the past 300 million years.The data are published on the website of the journal Nature .

 

After comparing the DNA of the coelacanth and other creatures, it was found that the rate of change of genes in the fossil fish was significantly lower than researchers previously thought.


"We found that the genes of the coelacanth develop much slower than all the other fishes and terrestrial vertebrates" - quoted by Daily Mail article co-author of an academic institution Alföldi Jessica Wade. The exact causes of this phenomenon has not yet been set, but the researchers are 

inclined to believe that this is due to habitat coelacanths.


"We always talk about how animals have changed over the years of evolution. But there is on Earth, and these corners where everything remains in its original form, and the animals living there just do not need to change. Coelacanth - some of them" - said the supervisor Group Kerstin Lindblad-Toh.

 

Scientists also have found regulatory regions of DNA that is in all vertebrates, and was first appeared at the lobe-finned fish. These genes control the development of the limbs. Further research will help to shed light on how the process of the evolution of mammals, scientists hope.

Coelacanth refers to a single type of lobe-finned fish, preserved to this day. We now know two subspecies Latimer - Latimeria chalumnae, inhabiting the eastern and southern coasts of Africa, and Latimeria menadoensis, found and described in the 1997 - 1999 years. near the island of Sulawesi in Indonesia. Females Latimer grow in length, on average, up to 190 cm, the males - up to 150 cm and weighs 50 - 90 pounds. Length newborn Latimer is 35 - 38 centimeters.

Write a comment

Comments: 0