Agar benih nila bisa tumbuh dengan cepat. Fingerling is phase tilapia life after fry. Success or not growing depend of it. Therefore quality of fingerling has to good. One of its sign is has size minimal 20 gram 3 month. For reach this size, larva is cultivated in three stages, first rearing, second reraing, and third reanring.
In every stage, larvas, or fry has to growth fastly. Pond preparation is one of method to fast larva, and fry growth. By pond preparation will fertile, appear natural food in high population. Natural food will be is very important for larva as feed. In high population, larva growth fastly. In low population, larva growth slowly.
In order this situation created, the ponds has to prepared before. The pond preparation activity are pond drying, dike improvement, flating bottom, diging canal, liming, fertilizing, and watering (see in order to pond fertile).
After pond ready, larva, or fry stocked by the density 150 larvas/m2 for first rearing, 100 fry for second rearing, and 50 fry for third rearing. Stocking is in the morning, when law temperature, so that no stres. Before stocking, pond water entered to transforter, so that temperatur both of them same.
Everyday, larvas fed by pellet powder (one of articial food in Indonesia with more 30 percent proteins). Pellet powder is given three time, are 09.00 o’clock, 12.00 o’clock, and 15.00 o’clock.
Dosis, 10 gram/1000 larvas in first week, 20 gram/1.000 larvas in second weeks, 30 gram/1.000 larvas in third weeks, and 40 gram/1.000 larvas in forth weeks. Dosis in second rearing, and third rearing average 5 percent of fish total weingh.
Harvest is done after a month by opening outlet, and closing inlet. Don’t forget in the front of outlet place filter so that fry out of pond. fry is catched by waring (catch in Indonesia) or secoop net. Larvas catched in the front of outlet by scoopnet, and entered to pails, and then storage to hapa. Hapas placed in the other pond.
In order refresh, larvas indirect handled, but it rested for one hour. Water has to irrigate to the hapa, to keep water quality. After that, larvas separated of rubbishs, dead fish, and other dirty by throw out water surface by the hand, larvas avoid to go to mid, and bottom. Muds also threw out of hapa so that the water clear.
If water has clear, larvas selected by a selector. In Indonesia, selector is named ayakan, a tool made by bamboo pieces, or alumunium, and 2 – 3 mm in messes. Selecting technic : Catch larvas by catcher, or scoopnet. Lay ayakan in the water surface in the other hapa. Enter larvas to ayakan. In a few minutes, littles fry will go out of ayakan, and bigs live there. Refeated that technic until finish.
Growth data every week : second weeks : 0,5 – 1 gram, fourth weeks: 2 - 3 gram, sixth weeks: 5 – 8 gram, eigth weeks: 9 – 11 gram, tenth weeks: 12 - 14 gram, twelveth : 15 - 20 gram.
In every stage, larvas, or fry has to growth fastly. Pond preparation is one of method to fast larva, and fry growth. By pond preparation will fertile, appear natural food in high population. Natural food will be is very important for larva as feed. In high population, larva growth fastly. In low population, larva growth slowly.
In order this situation created, the ponds has to prepared before. The pond preparation activity are pond drying, dike improvement, flating bottom, diging canal, liming, fertilizing, and watering (see in order to pond fertile).
After pond ready, larva, or fry stocked by the density 150 larvas/m2 for first rearing, 100 fry for second rearing, and 50 fry for third rearing. Stocking is in the morning, when law temperature, so that no stres. Before stocking, pond water entered to transforter, so that temperatur both of them same.
Everyday, larvas fed by pellet powder (one of articial food in Indonesia with more 30 percent proteins). Pellet powder is given three time, are 09.00 o’clock, 12.00 o’clock, and 15.00 o’clock.
Dosis, 10 gram/1000 larvas in first week, 20 gram/1.000 larvas in second weeks, 30 gram/1.000 larvas in third weeks, and 40 gram/1.000 larvas in forth weeks. Dosis in second rearing, and third rearing average 5 percent of fish total weingh.
Harvest is done after a month by opening outlet, and closing inlet. Don’t forget in the front of outlet place filter so that fry out of pond. fry is catched by waring (catch in Indonesia) or secoop net. Larvas catched in the front of outlet by scoopnet, and entered to pails, and then storage to hapa. Hapas placed in the other pond.
In order refresh, larvas indirect handled, but it rested for one hour. Water has to irrigate to the hapa, to keep water quality. After that, larvas separated of rubbishs, dead fish, and other dirty by throw out water surface by the hand, larvas avoid to go to mid, and bottom. Muds also threw out of hapa so that the water clear.
If water has clear, larvas selected by a selector. In Indonesia, selector is named ayakan, a tool made by bamboo pieces, or alumunium, and 2 – 3 mm in messes. Selecting technic : Catch larvas by catcher, or scoopnet. Lay ayakan in the water surface in the other hapa. Enter larvas to ayakan. In a few minutes, littles fry will go out of ayakan, and bigs live there. Refeated that technic until finish.
Growth data every week : second weeks : 0,5 – 1 gram, fourth weeks: 2 - 3 gram, sixth weeks: 5 – 8 gram, eigth weeks: 9 – 11 gram, tenth weeks: 12 - 14 gram, twelveth : 15 - 20 gram.
