WARNING: This post contains ecotoxicology: Non-biologists may be incredibly bored!
This is the result of Principle Component Analysis on the non-polar spectra from my methanol-chloroform extracts. The different symbols represent three different populations of animals. As you can see they are completely separated by PCs 2, 3 & 4. This is quite a weak differentiation as these three PCs account for 15.29, 9.74 and 7.95% of the variability in the data, respectively. However, differentiated they are, demonstrating that significant differences in fundamental metabolism exist between the three populations. Now I've just got to work out what those differences are. Which is a lot harder.