Semicolons

Q. Is the use of semicolons in the following series warranted (i.e., when the commas appear in the last member of the series and there’s no real threat of misreading)? It just looks weird to me: They were hunter-gatherers who sustained themselves by hunting; fishing; and gathering roots, berries, and various wild plants. 

A. You are right! The semicolons are pointless and counterproductive. They should be changed to commas.