Fish growth was determined monthly by sampling
5% of fish population from each cage and pond, and
their individual body weight was determined with a
field weighing scale to 0.1 g accuracy. Catfish were
sampled from cages with a dip net and tilapia were
seined from the entire pond. At the end of 4-month
experimental period, ponds were drained and al1 fish
in each pond were collected, counted and weighed in
batches as well as individually weighing 5% of fish
samples. The fish growth performance was expressed
in the following parameters:
Net fish yield (NFY) = total final weight-total initial
weight;
Mean weight gain = mean final weight-mean initial
weight;