An Intensive Culture System For Channel Catfish Fingerlings

Channel catfish (Ictalurus punctatus) were stocked at rates of 250, 500, 1,000 and 2,000 fry /208 1 drum, and reared to fingerling size. No significant differences occurred in rate of gain from days 0-33, but gains ranged from 0.22 g/day at the 250 stocking rate to 0.08 g/day at the 2,000 stocking rate from days 0-70. The highest average total biomass of 10,095 g was reached at the 2,000 stocking rate. Flow rate was maintained at a constant 0.32 I/sec in all drums. Food conversion from days 17-70 ranged from 1.42 at the 250 stocking rate to 2.67 at the 2,000 stocking rate. Water quality was monitored to evaluate the effect on growth. Oxygen concentration became a critical limiting factor as total biomass increased. Growth rates were best at the lower stocking rates in which the oxygen concentrations were higher.

Starting page
484
Ending page
492
ID
40780