I know it's exciting to see your fish spawning but from your pics, a low survival rate will probably be from the other fish eating the eggs or fry. Rams can be good parents or bad parents. You won't know until they try.
If you are serious about saving the fry in the future, you'd be better off spawning them in their own tank or pulling the spawn and hatching them in their own tank. It looks like they spawnd on something rather large so this would not be a good spawn to pull. PM me if you want more complete instructions on doing this. It's not the easiest, FYI
Hope it all works out. Keep us posted