| Main ref. | 138 | ||
| Country | Philippines |
||
| Name of Farm | SEAFDEC, AQD, Leganes Research Station |
Year |
1979 |
| Latitude |
|
Altitude (m) |
|
| Longitude | |||
| Type of culture | polyculture |
Sex of fish (m) |
mixed sex |
| Culture system | experimental ponds |
||
Ponds used for the study. |
|||
| Production units | 3 |
Area (ha) |
0.15 |
| Depth (m) | Volume3 |
||
| Main water source | estuary |
Supplemental water source |
rainfall |
Temp (0C) |
Salinity |
pH |
Oxygen (mg/I) |
Oxygen (%) |
Alkalinity (mg/I CaCO3) |
|
Max |
34.5 |
47 |
8.9 |
7.4 |
||
Min |
24 |
22 |
7 |
3.2 |
||
Mod |
29.3 |
34.5 |
8 |
5.3 |
Description of culture system |
Ponds were initially applied with CM at 2 tonnes/ha and inorganic fertilizer (16-20-0 NPK) at 50 kg/ha. 16-20-0 was applied at 25 kg/ha every 2 weeks, thereafter. Ponds with milkfish were stocked with prawn juveniles at a rate of 0.8/m2. |
Nutrient inputs |
|
Main food |
in-situ production |
Feed quantity |
|
(% BW/D): |
|
Feed quality (% crued protein) |
|
Fertilizer input (N) |
|
(P) |
|
Description of Nutrient input |
No supplementary food was given. The fish were dependent on the production of natural food in the pond. Stomach analysis showed the fish fed on diatoms, bluegreen algae, filamentous algae and some zooplankton. |
Production |
|
| Unit cycle | |
| Production period | 120 |
| Production cycle | 34 |
Comments |