Originally Posted by
CrappiePappy
I seriously doubt that. Your "twice in the Spring" spawn is likely an extended spawn period or an interrupted spawn. Any Fall egg sacs will likely be next Spring's spawn ... seeing as how they'll quickly go into their Winter mode as soon as the temps start dropping back down to a normal level for your area.
Biologists say that, not only does water temps have to be in a specific range, but the length of daylight is also a key factor (some saying it's a bigger factor than temp alone). I believe I remember it being something in the 13-14 hours of daylight range. Since the water temps have to be above a certain level for spawning to take place, as well as fry survival, and the temps have to be stable within that range ... it would seem to make sense that the length of daylight would factor in at keeping the temps stable & within that range. :twocents
... cp :kewl