University of Cambridge > Talks.cam > Isaac Newton Institute Seminar Series > Shell Shape of Snails

Shell Shape of Snails

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact info@newton.ac.uk.

GFSW03 - Shape analysis and computational anatomy

The beautiful, intricate, and widely diverse shapes of snail shells have fascinated people for centuries. In particular, shells have been analysed by mathematicians wanting to understand their geometric properties. One of the greatest contributors to the field is D'Arcy Thompson with his book On Growth and Form. This book celebrates one hundred years this year, and has played a major role in the field of morphometric analysis.
One well established and simple way of visualising snail shells is built on Raup's growth model, using logarithmic equations with three growth parameters. However, analysing a shell to find the correct values for the growth parameters is not always a straightforward task. 

The goal of my research is to develop a method for obtaining the growth parameters from 2D images of shells. I will test my methods with a set of images of the species Littorina saxatilis. This species is biologically interesting because strong natural selection maintains different shell shapes in distinct environments. It would therefore be an advantage to have a way of describing this natural shape variation, and the shapes of laboratory hybrids, in terms of meaningful growth parameters. This is expected to give a better understanding of the operation of selection and of the underlying genetic basis of shape variation, compared to more classical PCA analysis of landmarks.

This talk is part of the Isaac Newton Institute Seminar Series series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2017 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity