And egg to be postponed, and to give birth to skink: reptile revealed the unique method of reproduction
Scientists have discovered the possibility of azerarmenia and live births in the same litter.
April 4, 2019 at 16:08
Yellow-bellied three-toed skink (lat. Saiphos equalis) – an unusual reptile, like a snake with little legs. But that’s not it, but that Saiphos equalis is capable of both live births and egg-laying. It is known that the lizard prefers one of these methods, depending on the climate. Inhabiting the Eastern part of Australia, Skinks face and the coolness in the mountains, and with the heat on the coast. Mountain populations living at an altitude of over 1000 meters, they reproduce by live birth, and coastal prefer to lay their eggs.
However, scientists have recently discovered example of reproduction both ways during a single pregnancy. Watching the population of Skinks from cool areas, experts have documented how female first postponed three eggs, and a few weeks later gave birth to a live cub.
The authors of the study explain this by the desire to increase the chances of obtaining offspring; guaranteed to raise a baby, and part of which on the stage of an egg, and in infancy, the risk of suffering from predators, and other factors.
First vertebrates have eggs, but over time in some species, the embryos began to linger in the mother’s body; the egg shell is replaced by the placenta, and the light began to appear live young. This ability independently developed in 115 groups of reptiles. A yellow-bellied Skinks remain an ideal model for the study of evolution and a living example of the transition from egg-laying to live birth.
Find out about other skink – cineasia.