-------- Original Message --------
Subject: Time series analysis on landmarks
Date: Fri, 16 Mar 2012 12:11:28 -0400
From: J.C. van Rijssel <[email protected]>
To: <[email protected]>
Dear Colleagues,
Currently, I am working on a large dataset of fishes where I use
preserved specimens up to 30 years ago. This results in a nice dataset
where I can check if the body shapes of these fishes have changed over
the past 30 years (at three year time intervals). After analysis (CVA),
body shape does change within a decade (concurrent with ecological
changes in the fishes' environment).
However, in the most recent years, the body shape seems to return back
to the old shape of my first year (also concurrent with the ecological
changes).
What I would like to know if there is a way to (statistically) check
whether the body shape has really returned to its original form or that
this might be just a coincidence that my first and last year happen to
have the same shape (no significant differences in the permutation test
of the CVA)?
I think there should be some sort of time series analysis which could
solve the issue. Does anyone know of a statistical program which can do
a time series analysis (or autocorrelation) on landmarks?
Best regards,
Jacco van Rijssel
PhD-Student Integrative Zoology
Leiden University
The Netherlands
