The water temperature in the temporary culture pond of Penaeus vannamei should be 1 ~ 2℃ higher than that in the sea area three days ago. If the water temperature rises too fast and too high, it is easy to make Penaeus monodon premature or miscarry. After that, the temperature was raised to 2 1 ~ 22℃ at the rate of 0.5 ~ 1.0℃/ day, and the temperature was temporarily raised for 20 ~ 30 days. Salinity is based on the salinity of seawater. The suitable salinity is 13 ‰ ~ 33 ‰.
Extended data:
The dissolved oxygen in the water should be kept above 5ml/L, and the daily water change should be 1/4 ~ 1/3, and the transparency should be 30 ~ 50cm. Oratosquilla oratoria is a crustacean with drastic temperature changes, and its growth, development and life activities are directly affected by environmental water temperature. The water temperature in the living area is about 6 ~ 365438 0℃, and the optimum temperature is 20 ~ 27℃, which belongs to the wide temperature category. Under the laboratory conditions, Oratosquilla oratoria was directly moved from 17℃ to seawater at 5℃, and its body immediately arched, then slowly straightened out, and then fell into a coma.
When it was moved into seawater at 33℃, the shrimp jumped up and down first, then fell sideways to the bottom of the water, only the swimming limbs could swing, and after 3 minutes it was unconscious. Therefore, it is considered that the temperature resistance range is 5 ~ 33℃. When the water temperature changes, the temperature tolerance range will increase. Pay special attention to the temperature difference when cultivating parent shrimp.
Baidu Encyclopedia-Pipixia