Catfish, catfish cultivation, water quality
Channel catfish were grown in tanks with integral biological filters and complete recirculation of water. After the fish had resided in the tanks for 120 days, solvent extraction was performed on a portion of the tank water. Fresh pond-raised specimen channel catfish showed decreases in their heartbeat rates of about 20 percent when exposed to the extract. This metabolic disturbance is thought to be a factor in reducing the growth rate of fish held in close confinement in recirculating systems.
Raible, R. W.. 1979. Study of Cumulative Growth-Inhibiting Factors in Recycled Water for Catfish Cultivation. Arkansas Water Resources Center, Fayetteville, AR. PUB064. 45