Dear Mr Li

you wrote:
>Table 2, The survival rates came from counting the number of fish.
>In slurry pond, the stocking number of Tilapia was 821, but the
>number of fish harvested was 9,080. Here a footnote was
>missing. It should add a symbol of ** to indicate that there
>were 8,259 fingerlings, which were self reproduced plus the
>stocked 821, and the total should be 9,080.

Q1: After 202 days there where 8,259 Tilapia fingerlings in the slurry pond
whereas the Manure pond had only adults. Are these fish normally so prolific this young?

Q2: In your concluding remarks you speak of draining the ponds at harvest.
Is harvesting of fish then all at once? or are traps or nets used over a longer period?

Regards and thanks
John Harris
Dalwallinu, Australia