For the Tree one:
-Hypotheses (state null & alternate)
-Data table/list
-Results (contingency table) for group & class data sets ; followed by any calculations, p values, etc on each.
Discussion: what do the statistical calculations mean (address the hypothesis)? What might explain these results- either ecologically and/or in terms of our methods?

For the Crab one same format, just you don’t have to do a group data set/calculation, it’s all class data set.