I want to compare evolution rate between two set of data (morphological and reproductive traits) because the values of the reproductive traits is very small in compare with morphological traits (both of the same unit and scale [mm]), so I want to perform a log-log regression of species mean trait measurements on species mean thorax volume which I used it as the index of the body size, but I don't know how can I perform it. Thus, I am looking for help or potential collaborator.
thanks for any suggestion.