Would like to create some areas for bluegill to spawn - so
1) depth spawning areas should be placed ?
2) use gravel ? if so, size preferred ?
3) Should it be placed on the pond bottom or should I build some sort of large wooden boxes and fill them with rocks ?
4) How do you minimize predation by Osprey ? Bluegill now spawn in about 18" of water in my pond and the Osprey are continually picking them off their beds.
Looking forward to input
1) BG spawn very shallow, I'd say around 6" to 2', give or take.
2) You can use gravel, but plenty of people on here said their BG spawned perfectly fine on just a plain ol' clay bottom. I'm not sure if adding sand or gravel helps (I'm sure it would help, but I'm thinking about cost vs return)
3) Definitely on the pond bottom. BG spawn by fanning out depressions on the pond bottom.
4) Not sure how to keep birds from getting your fish, but I think there's some good threads around here on that specifically. I found one here, that has some suggestions for you:
https://forums.pondboss.com/ubbthreads.php?ubb=showflat&Number=285412
