Scientists at Portland State University in the United States found that allosaurs were scavengers, not predators.
Allosaurus is a genus of dinosaurs that lived about 155-145 million years ago. They walked on powerful hind legs, while the forelimbs were relatively small. Fossil remains of Allosaurus have been found in North America, Southern Europe, and East Africa.
Scientists previously believed that allosaurs were predators, but the authors of the new work proved that this species ate carrion, and did not hunt live prey.
The authors made this conclusion based on modeling: it helped to identify the exact relationship between the food resources that existed in the Jurassic period and the energy requirements of allosaurs.
Scientists also analyzed data on fossils of those times, for example, the size of the population of predators, herbivores, and scavengers. In addition, they studied the morphological features of the skeleton of these animals, namely the structure of the skull.
As a result, the researchers concluded that the bones of the skull and teeth of allosaurs were fragile, and this is not typical for predators. This species also lacked the binocular vision required for hunting.