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Enhanced growth of cage cultured channel catfish through polyculture with blue tilapia

1987; Elsevier BV; Volume: 62; Issue: 3-4 Linguagem: Inglês

10.1016/0044-8486(87)90167-0

1873-5622

Ken Williams, Glen Gebhart, O. Eugene Maughan,

Fish Biology and Ecology Studies

Abstract Channel catfish ( Ictalurus punctatus ) and blue tilapia ( Oreochromis aurea ) were cultured in 1-m 3 cages for 136 days in four central Oklahoma ponds at three ratios: 400 channel catfish and 0 blue tilapia; 390 channel catfish and 10 blue tilapia; and 350 channel catfish and 50 blue tilapia. Mean weight and percent harvestable channel catfish per cage were higher for cages with 50 blue tilapia than for cages with 10 or 0 blue tilapia, but lacked statistical significance. Among fish held at the different ratios no significant differences were found in net production, food conversion efficiencies, condition factors, or weight coefficient of variation of channel catfish. Another experiment was conducted in Langston Lake where six cages were stocked with 400 channel catfish and 0 blue tilapia and six cages were stocked with 400 channel catfish and 50 blue tilapia. The mean weight of the channel catfish in the cages containing blue tilapia (260.7 g) was significantly higher ( P