The turnout to our last election seems quite normal, for a SE-site of this size. During the last election, Bio-SE had:. "891 voters were eligible, 226 visited the site during the election, 119 visited the election page, and 55 voted"
In comparison, PhysicsSE had a similar level of attendance when site was of similar size.:.
The same also goes for Chemistry-SE:.
Sure, you might still find this too low. My point is that the attendance at the latest BioSE election was normal, which means that it will probably not be easy to increase it that much.