As far as I know, it doesn't. You're touching on an important point, though, which is variability differences could just be a side effect of higher levels of a given trait, rather than an independent phenomenon. The best assessments of greater male variability look at variability *over and above* that deriving from sex differences in a given trait.
Yes, that was what I was wondering about. Thank you.
In most amphibians, the females are larger than the males. Does their size also show greater variability?
As far as I know, it doesn't. You're touching on an important point, though, which is variability differences could just be a side effect of higher levels of a given trait, rather than an independent phenomenon. The best assessments of greater male variability look at variability *over and above* that deriving from sex differences in a given trait.