Mine spawned this year and there are yoy from 1/2" to 2-1/2".
These little guys look a lot like a FHM until about 2" then you can see visual keys to which species they are fairly easily.
I think every impoundment is different on how many times a Female GSH will lay eggs. When I've discussed this with Anderson's while asking about spawning structures, they disclosed the captive larger aduldts will spawn 6-8 times on average when they use the mats for eggs. In the ponds where they let natural reproduction occurs they use cedar piles and say April to mid july, then tappers off with an up-tic in spawning in late September again until as late as the end of October.
I think in a BOW with normal pond fish present they get pushed into other areas "other" than where they may want to spawn and like other species, if they can't get it done when eggs are ripe they reabsorb them or just blow them randomly.
