I am seeking advice on how to deal with outliers when trying to calculate residual body condition indexes (by using the residuals from a regression of body mass with body length).
I am using a body condition index to explore a number of spatial ecological questions, all related to the main question of 'does body condition affect movement?'.
I need to remove/include certain individuals depending on the analysis that I am doing. So when examining some factors, it may be appropriate to include individuals which are flagged as outliers for biological relevance. Therefore, do I need to recalculate residual body condition for each test if different combinations of individuals are being used each time?
I am very new to using BCI's specifically and am not a seasoned statistician, so advice would be much appreciated!