If you are asking why you found the beds but there were no bedding fish on them although they look brand new ,its one or 2 things.One you found them too late and they have come off already or secondly and most likely you werent the first one to find the bed and they were cleaned out by one of those"I caught 50 gills and Shell Crackers guys already..........sort of like the you should have been here last week stories! No new fish take over a bed ,once the guard male is caught its over for that bed.Smaller fish will come in and eat the eggs and fry with no resistance. Remember where you found the bed and start looking in that area again next year earlier as they tend to bed close to or on top of where they did the year before. They need the sandy small gravelly bottom.Unfortunately On Gville a lot of the old bedding areas have silted in from all the grass die offs over the years and its left a lot of the old bedding areas with about 2 ft of muck and no sand..Crackers will use the hole in weeds to nest easier than a gill will and it might not be as sandy.