Term for relative measure of abundance (index vs. cpue)

While giving the presentation on input and output for FIMS there was a lot of tangential discussion surrounding the decision to use CPUE for everything rather than index. Some complaints were that not all measures of abundance are relative or a measure of catch standardized by effort. I was thinking that everything would be a CPUE because at some level you are always measuring effort but it is accounted for in some hidden way. I think that less people have a problem with index meaning multiple things beyond "index of population abundance". I searched the literature trying to find a different word and even in literature about bird, deer, and other animal populations it seems like they use "index" quite heavily. Do we have other options? Do people have a preference for one term over another?

Start by reviewing the issue text and its two comments to understand the unresolved terminology discussion around “index” and “CPUE.” Done means reaching a documented decision on the preferred term and defining the scope of any resulting dictionary change; no files or tests are named in the issue.