Mosquitofish are feisty there is no doubt about that. I haven't seen a negative relationship between ponds with and without mosquitofish. I think in many of the studies Eric notes, mosquitofish are not being preyed upon. So they literally have free rain of the water body. When bass are present, they literally keep the mosquitofish in water 6" or less and in the thickest weedy areas you can find in your pond.

Personally, I like banded killifish when it comes to mosquito larvae control. Even fatheads will eat mosquito larvae.