1 No juvenile body cultivation No maternal incubation water temperature should be gradually increased to 20 ~ 22 °C, dissolved oxygen 5 mg / liter or more. When no nauplii develop to I-II, fertilizer and water should be applied and single-cell algae should be inoculated. The inoculum size is 30,000 to 40,000 cells/ml, and when no hatchlings are in stage III, the number of unicellular algae should be 15104 cells/ml or more. The daily amount of fertilizer: ammonia fertilizer (sodium nitrate) is generally 2 grams per cubic meter of water, and phosphate fertilizer (potassium dihydrogen phosphate) is 0.2 grams per cubic meter of water. In the no-larval stage, the water is generally not changed.
2 The temperature of water raised in the larval larvae to raise zoea should be gradually increased to 22 ~ 24 °C. The juveniles mainly feed on plant foods, and the unicellular algae density as bait should be maintained at about 10104 cells/ml. To the larval stage II feeding rotifers 10 to 15 / tail larval days. Stage III larvae should be cast Artemia nauplii 3 to 5 / tail larvae days.
When the pH is not higher than 8.6 on the day or every other day, the ammonia nitrogen content is not higher than 0.6 mg/l, and the dissolved oxygen is not lower than 5 mg/l, the water may not be changed before the third stage of the zoea. A certain amount of fresh seawater, the zoea larvae began to change water after entering phase III. Change the water 1/5 to 1/3 every day.
The feeding habit of the larval larvae of the larval prawn larvae was changed to animal feed, but the unicellular algal feeds should also maintain a certain amount. The larvae were fed daily Artemia nauplii 10/tail in Phase I and unicellular algae kept 20,000 to 30,000 cells/ml. The number of Artemia nauplii fed daily for Arthropods II to III was 20 to 30 per tail. Single cell algae maintain 10,000 to 20,000 cells/ml.
Change the water no less than 1/2 a day.
The aeration volume was adjusted to about 2.0% (boiling at the inflated area). The incubation temperature during this period should be adjusted to 24 ~ 25 °C.
4 larvae feed on Artemia nauplii in the early stage (P1 - P3) of larvae, and the feeding amount is 70-100/tail. Days later, in addition to continued feeding Artemia larvae, in vitro, insufficient Can be minced and rinsed quail meat (full-fed larvae daily feed amount of 10 ~ 15 g / ten thousand). Can also be fed egg tarts, minced shrimp and shrimp chips and other micro-particle feed.
Change water 2/3 or more daily.
The inflation volume is adjusted to 2.5%. The incubation temperature was adjusted to 25-26°C.
2 The temperature of water raised in the larval larvae to raise zoea should be gradually increased to 22 ~ 24 °C. The juveniles mainly feed on plant foods, and the unicellular algae density as bait should be maintained at about 10104 cells/ml. To the larval stage II feeding rotifers 10 to 15 / tail larval days. Stage III larvae should be cast Artemia nauplii 3 to 5 / tail larvae days.
When the pH is not higher than 8.6 on the day or every other day, the ammonia nitrogen content is not higher than 0.6 mg/l, and the dissolved oxygen is not lower than 5 mg/l, the water may not be changed before the third stage of the zoea. A certain amount of fresh seawater, the zoea larvae began to change water after entering phase III. Change the water 1/5 to 1/3 every day.
The feeding habit of the larval larvae of the larval prawn larvae was changed to animal feed, but the unicellular algal feeds should also maintain a certain amount. The larvae were fed daily Artemia nauplii 10/tail in Phase I and unicellular algae kept 20,000 to 30,000 cells/ml. The number of Artemia nauplii fed daily for Arthropods II to III was 20 to 30 per tail. Single cell algae maintain 10,000 to 20,000 cells/ml.
Change the water no less than 1/2 a day.
The aeration volume was adjusted to about 2.0% (boiling at the inflated area). The incubation temperature during this period should be adjusted to 24 ~ 25 °C.
4 larvae feed on Artemia nauplii in the early stage (P1 - P3) of larvae, and the feeding amount is 70-100/tail. Days later, in addition to continued feeding Artemia larvae, in vitro, insufficient Can be minced and rinsed quail meat (full-fed larvae daily feed amount of 10 ~ 15 g / ten thousand). Can also be fed egg tarts, minced shrimp and shrimp chips and other micro-particle feed.
Change water 2/3 or more daily.
The inflation volume is adjusted to 2.5%. The incubation temperature was adjusted to 25-26°C.
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