In an article recently published in the international journal Behavioral Ecology , scientists from Pablo de Olavide University have shown that grasshoppers are capable of changing the color of their body to the color of the ground on which they live to be less visible to potential predators. In addition, they have found that there is a great adjustment of this camouflage capacity depending on the environmental conditions, since when faced with a greater risk of being attacked by predators, this camouflage improves even more. These scientists from the UPO’s Department of Molecular Biology and Biochemical Engineering, led by researcher Pim Edelaar, work within the theoretical framework of Evolution, they investigate the adaptations of living beings to their environments and how this may have an influence on, for example , biological invasions or the formation of new species.
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Humberto Ferrón and Héctor Botella, researchers at the Cavanilles Institute for Biodiversity and Evolutionary Biology, have demonstrated the close relationship between the shape Italy Email Database and distribution of scales in the body, and the different ways of life of sharks. The work, published this Monday in the magazine ‘Plos ONE’, establishes the bases to know the way of life of extinct vertebrates with ‘scales’ (distribution of scales) similar to current sharks, and constitutes the first step towards the creation of a scaling atlas. Researchers have shown that telodonts, one of the earliest known groups of vertebrates, were already ecologically highly diverse at the beginning of the group’s evolutionary history. “They had species that inhabited the sea depths, very active swimmers, and even species that swam forming shoals or schools”, highlights Humberto
Ferrón. Other thecodonts already had scales to prevent parasite settlement. These facts suggest, according to the expert, that parasitism and social behaviors in vertebrates already existed during the Silurian period, more than 400 million years ago. To obtain these conclusions, the authors have studied the scaling pattern (shape of the scales and distribution on the body) in about a hundred species of sharks. The application of different morphometric and statistical techniques has made it possible to quantitatively describe the close relationship between the scaling pattern and the different ways of life in current sharks. According to Héctor Botella, “sharks, more popular perhaps for their large jaws, their sharp teeth or their locomotor or reproductive habits, owe to a large extent their evolutionary success to the phenotypic plasticity of their skin,