A preview of the PDF is not available
Water as a driver of evolution : the example of aquatic snakes
Abstract and Figures
Animal-environment interactions are determinant in driving the evolution of phenotypic variation. Most aquatic animals have developed adaptations to overcome the physical constraints inherent to an aquatic lifestyle and particularly to motion in water. These constraints are the drag and the added mass if an acceleration is involved in the motion, such as during prey capture. The aim of this project is to evaluate the role of water as a potential driver of evolution of aquatic snakes by focusing on morphological and behavioral convergences during underwater prey capture. Snakes are a good model as an aquatic life-style has originated independently in different genera. However, aquatic snakes did not develop a suction feeding system in contrast to most aquatic vertebrates. Prey-capture under water is constrained by the physical properties of the fluid and thus morphological and/or behavioral convergence is expected. By comparing the head shapes and the behavior of different species, we evaluated the impact of water on the evolution of head shape and strike behavior. By using experimental fluid mechanics approaches, we quantified the physical constraints involved in prey capture and evaluated the nature of the evolutionary response in response to these hydrodynamic constraints. This interdisciplinary approach allowed us to bring novel data to our understanding of functional constraints as drivers of phenotypic evolution.
Figures - uploaded by Marion Segall
All figure content in this area was uploaded by Marion Segall
Content may be subject to copyright.