News from the Earth Sciences
- Seasonal Arctic summer ice extent still hard to forecast.
- First animals oxygenated Earth's oceans
- Arctic Research
- Friedrich Wilhelm Bessel Research Award
- Jacqueline McGlade appointed UNEP Chief Scientist
- Dr Dominic Papineau joins our department.
- Arctic Summer Ice Melt
- PhD Topics 2014
- Careers Forum 30 January 2014
- 26Al/10Be Dating
- NERC Student Photography Competition
- Evolutionary Mechanics
- A most unusual history of an iron meteorite.
- Iron in the Earth’s core weakens before melting.
- The Charles Schuchert Award
Thinking of studying earth sciences?
A new study lead by Prof Julienne Stroeve says year-to-year forecasts of the Arctic’s summer ice extent are not yet reliable.
22 November 2013
Walking the cat back: evolutionary mechanics and modularity of felid locomotion
Dr. Anjali Goswami, Reader in Palaeobiology and Prof. John Hutchinson from Royal Veterinary College have been awarded a £219,910 project grant from the Leverhulme Trust for the project "Walking the cat back: evolutionary mechanics and modularity of felid locomotion”.
In studying the evolution of vertebrate locomotion, the focus for centuries has been on limb evolution. Despite significant evolutionary and developmental correlations among the limbs, vertebrae, and girdles, no biomechanical studies have ever examined the entire postcranial skeleton or explicitly considered the genetic and developmental processes that underly morphological variation, which are captured in phenotypic correlations. In this study, we will conduct experimental and geometric morphometric analyses of living and fossil cats, including the only large, crouching mammals, to study the evolution of locomotion, the mechanical consequences of size-related morphological evolution, and the evolution of correlations (modularity) in the postcranial musculoskeletal system.
Biomechanical analyses have rarely been unified, especially on the level of the whole skeleton, with the plethora of studies examining the genetic and developmental processes that underlie morphological variation, the raw material for natural selection. These genetic and developmental processes are, however, captured in studies of phenotypic modularity and thus can be studied in the same specimens as are used in biomechanical analyses.
Here, we provide the first comprehensive analysis of the intrinsic (genetic and developmental) and extrinsic (biomechanical) forces that shape the evolution of the postcranial skeleton from diminutive house cats to giant sabre-toothed cats, which display a unique postural solution to the problem of large body size. By bridging the disparate fields of functional biomechanics, palaeobiology, macroevolutionary trends, and developmental and phenotypic modularity, this study will provide a model of integrative evolutionary science and a foundation for future analyses on the evolution of form and function.