So is this a RW chart you made from the raw data in the study. I did not see this chart or a discussion of RW. The study through out states caveats about the sample size and changing conditions and other reservations and was intended to compare fast growing vs slow growing LMB over long time periods.

FWIW standard RW includes whole populations not males vs females. Under the same conditions I would expect RW by design would be similar for both as it is an average of all populations.