New theory of evolution from water to shallow

Why did the animals have a victory over the finned species in the migratory race from underwater to land?

Snakehead (left) and tiger salamander

The study of Clemson University (USA), which compared the activity of mudskippers (Mudskipper) and the two front legs of the tiger salamanders , can be used to analyze tetrapod fossils - The term refers to vertebrate 4-legged animals - aimed at understanding evolution from underwater life to shallowness.

According to researcher Sandy Kawano, the study conducted on tilapia and tiger salamanders because both have some similarities with the ancestors of tetrapod species. By analyzing their organs and their movement patterns, Kawano argued that it was possible to partially decipher the movement of tetrapods when migrating from the water to the ground.

Kawano and his partner Richard Blob tracked and compared the forces exerted on the front fins of the mudskipper with the front and hind legs of the tiger salamanders as they moved. The results show that the finfish's fin is subject to more intermediate pressure (between body and ground) than the salamanders.

Kawano's group hypothesized that because the pectoral bone in the chest of the fish cannot withstand this impact, it is difficult to adapt to life on land, while in salamanders, body weight is dispersed in 4 limbs so they can move on the ground more gently and easily.