I've heard multiple times that GSF only spawn once a year, and that may be true, but what I see in mine is their spawn doesn't seem to be influenced as greatly by moon fazes like BG. I've got GSF on beds that have been there since the first part of May. I've only seen them move off twice, and both times was due to the shallows cooling off. As soon as it warms back up, they're right back on the bed. At this rate, theyll spawn all summer.
One spawn pre year does not mean only one spawning time. Some may spawn in May and others in June but different fish. The are good studies on BG that were followed and studied both visual (boat or wading) and underwater (by by divers). Sometimes we refer to rolling spawns and there are several threads using that name.
Also fish may be driven off the beds (deferred spawn)and retain eggs and spawn later. That is still one spawn.
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