I recently purchased a 12-acre lake in North central Texas. The lake was impounded in the early 1990's. The previous owner stocked the lake correctly; however, it appears the lake has been mismanaged....bass last year were 1/2 lb under weight.
I am now harvesting all bass under 16" and am trying to rebuild the depleted bluegill population.
Above the lake there is a 1/2 acre sediment pond (which feeds into the lake). The sediment pond is approximately 9 feet deep when full. I plan on converting this sediment pond into a brood tank for forage species.
Here are my thoughts, please let me know if you think this would work:
-Convert the 1/2 acre tank into a Brood Pond for forage.
-The brood pond has some natural drainage feeding into it (to aid the well in filling). An earthen spillway should be in place as an “emergency spillway” [when rain is too heavy for trickle tube (surface spillway pipe) to handle].
-Electric well (5 HP, 40 Gallons per minute-GPM) feeds the brood pond
-A Corrugated pipe (trickle tube approximately 20” in diameter-might need to be larger depending on volume. The tank/dam contractor could determine) is located on the surface of the brood pond (opening is at pool level). Well water feeds the brood pond. 40 gpm goes into the pond and theoretically 40 gpm exists the pond via the surface pipe spillway. The brood pond water exits the surface pipe, travels through the dam pipe and feeds into the lake at 40 gpm. The brood pond is getting plenty of aeration and cooler water (from the well). In addition, as the well water circulates through the brood pond, it becomes semi-fertilized before entering the lake.
-Ahead of the surface spillway pipe is a valve. This valve opens and shuts the drain going through the brood tank dam. This valve is located ahead of the spillway pipe leading through the dam, so the water will continue to exit the brood pond and feed the lake at 40 gpm while the drain is closed.
Ideas for Brood Pond:
-Stock 25 Tilapia in April
-Tilapia have several advantages….they spawn every 6-8 weeks (depending on species). The water from the well feeding the brood pond should be the correct temperature for continual spawning activity.
-The 25 brood Tilapia are stocked in April. They breed continuously from April through late August. The tank can be drained (or partially drained) earlier; however, the Tilapia released early might hurt the fishing (Bass would be harder to catch)! In late August, the 25 brood fish (and all subsequent offspring) have populated the brood pond into the thousands (ideally). The valve is opened and the entire brood tank is emptied into to main bass lake. The bass/catfish/bluegill feed on the Tilapia from August through December (until winter die off). The bass gain their Fall weight (which will aid in winter survival and spring spawning) and the newly released Tilapia will take the pressure off the bluegill population for a few months.
-Tilapia are an “Ecologically Safe” baitfish. They die once water temperatures drop below 55 degrees. There is no fear of them overpopulating a North Central Texas lake. Their numbers can be controlled (every Spring, you know you are starting with zero Tilapia in the main lake).
- Tilapia are low trophic level feeders. They feed on vegetation, phytoplankton, algae and manufactured fish foods. Since the population density would be high in the brood tank, they would probably need a supplemental fish food fed twice daily.
-This type of brood system appears to be very cost efficient…start with 25, end up with thousands. This initial construction of the dam/valve (trickle tube) is expensive, but the water well would be running anyway….. use it to aerate the brood pond. The same water going into the brood pond would have been going straight into the lake. It seems like a better use of the well source.
Disadvantage:
-Cost to run well from April through September
-Feed bill (fish pellets) for maintaining brood pond
-Several of the Tilapia in the brood tank will be 2 lb chunks at the time of release. Too large for most bass to consume (why a huge fish fry should occur on the day of release)
I don't know if the above ideas would work; however, it looks pretty good on paper (I hope you can understand my description).
Please let me know if anyone has thoughts/concerns over my brood tank ideas.
Thanks,
Gauge