Gambusia will tolerate ice cover and will survive winters at least as far as northern Ohio. In ponds that lack good shoreline cover small predators can easily eliminate breeder gambusia.
My
RES/SMB pond had an explosion of bushy pond weed this year. My gambusia that were small in number originally (I think they got in there from some water primrose weed transfers I did from my sediment pond) have done tremendously well and are in high numbers around the shore line now. Waves of them when I drive around in the UTV. I would assume because they have loads of cover now with all the weeds in the pond and along the shore line.
