Do you love big bluegill?
First, the combination of bluegill, redear and catfish may be a good start, but is not complete, if large bluegill is the target.
Possibley blue catfish will have some success controlling the reproduction of the bluegill. However, channel catfish do not work as carnivores to control bluegill reproduction. Even brood sized channels do not control them. Actually, I have a pond of blue catfish brood stock (15 to 30 pouds) that use bluegills for forage, but do not really control reproduction. In this fed pond, the bluegills do get up to about half a pound, but that is it, even after four years.
I suggest that you manage your bluegill/red ear more closely by stocking about 100 largemouth bass per acre, to eat the reproduction.
Check the literature out of Oklahoma and Missouri for information about bluegill and hybrid bream growth. Some work since 2000 was done in Oklahoma and work is underway in Missouri on comparing growth rates.
It is interesting that people have been working with bream as a food fish for over 40 years, but are not successful at comercializing food size bream production. However, bluegill can be purchased from wild stocks in Canada, Lake Okechobee, Florida, or the Santee Cooper Reservoir, South Carolina.
Even the Georgia Giant has not taken off as it should have, if the growth potential were as advertised. This fish is like many hybrid strains, the first generation must be carefully managed and nurtured to get good growth. Exposure to any other sunfish results in yield-lowering reproduction. Ken told me, may he rest in peace, that he did not like to see any natural water flowing into a GaGiant pond because that meant fish contamination and dilution of growth potential.
Recent work that shows how to grade the hybrid bream to increase the number of males in the stocking population is a help to limit reproduction. Some observations indicate that over 70% of hybrids that are stocked as 35 to 40 gram fish will reach a quarter pound or more in weight in six to seven months. Then a yield of about 500 pounds per acre would be probable and over 1,500 lb/acre might be possible.
The idea of "what size is eatin' size" should be pressured down to between one quarter and one third pound. To try for 1/2 pound is very difficult and would take too long with the bluegill genetics we have now.
I would like to know which bluegill or hybrid bream hatcheries really control their spawning programs enough to assure that, 1. they start with pure bluegill or green sunfish as parents, and 2. they provide first generation hybrids or pure bluegill to the buyer.
Sunfish are so easy to integrate between species that a hatchery must be very careful to start with and keep their stocks pure.
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