They don't spawn all at once. And water temp is critical,,,so critical,,that it will affect full moon cycles. Everything is behind this spring. Mushrooms,,,turkeys acting normal in my area,,trees blooming out,,just go north of Bloomington and look at the woods, the undergrowth,,the bloomed out dogwood, redbud in the deep woods. Mayapples coming up, the lushness of undergrowth is sparece the farther north. Its been cold, and several frosty mornings. I even had a farmer tell me that there was going to be several more frosts this spring as the temps are below normal. Even look at people and how late their gardens are being worked up and yet to be planted. In small ponds and lakes,,,temps are also warmer than larger lakes, so there will be early spawning there,,but not yet. Just my 2 cents.