Stocking densities of caged tilapia had significant (P < 0.05) effects on the survival, growth,
and food conversion ratio of caged tilapia, and on the growth of open-pond tilapia. The survival of
caged tilapia decreased from 91.4% + 5.0 to 57.2% + 8.1 with increased stocking densities from
30 to 70 fish mm3, while survival of pond tilapia was higher than 90.0% in all treatments. The
average treatment mean weights of tilapia harvested from cages ranged from 509 + 26.0 to
565 + 13.9 g. The growth of pond tilapia was quite slow, with daily weight gain increasing from
0.30 f 0.02 to 0.47 k 0.08 g per fish day -I, in response to increased feed inputs to caged tilapia.
The combined net yield of both caged and open-pond tilapia was highest in the treatment with 50
fish m-‘. Water quality analyses indicated that the wastes from caged tilapia were insufficient to
generate abundant natural food for the growth of open-pond tilapia
Stocking densities of caged tilapia had significant (P < 0.05) effects on the survival, growth,
and food conversion ratio of caged tilapia, and on the growth of open-pond tilapia. The survival of
caged tilapia decreased from 91.4% + 5.0 to 57.2% + 8.1 with increased stocking densities from
30 to 70 fish mm3, while survival of pond tilapia was higher than 90.0% in all treatments. The
average treatment mean weights of tilapia harvested from cages ranged from 509 + 26.0 to
565 + 13.9 g. The growth of pond tilapia was quite slow, with daily weight gain increasing from
0.30 f 0.02 to 0.47 k 0.08 g per fish day -I, in response to increased feed inputs to caged tilapia.
The combined net yield of both caged and open-pond tilapia was highest in the treatment with 50
fish m-‘. Water quality analyses indicated that the wastes from caged tilapia were insufficient to
generate abundant natural food for the growth of open-pond tilapia
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