Salinity and temperature in living culture of Penaeus monodon

1, the temperature of live culture of Penaeus pipiens, the water temperature is controlled at 20 ~ 30℃, and the salinity is? The salinity of each sea area is basically suitable, with the salinity of 13 ‰ ~ 33 ‰. The official name of Pipi Shrimp in Chinese mainland is "Squid Shrimp".

2. The water temperature in the parent shrimp pond should be 1 ~ 3 days higher than that in the sea area. The water temperature rises too fast and too high, which is easy to make the parent shrimp premature or miscarry. After that, the temperature was raised to 2 1 ~ 22℃ at the rate of 0.5 ~ 1.0℃/ day, the gonads were temporarily raised for 20 ~ 30 days, and a small amount of fresh nereis, shrimp and clam meat were fed to further fatten the gonads.

3. Although the females of squid basically stop eating during the breeding season, and their stomachs are almost empty, when the gonad coefficient is as high as 65,438+04% at 22℃, the eggs in the egg mass are clear and basically spherical, that is, mature eggs.

Extended data

Water quality management

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. Generally speaking, the water temperature should be controlled at 20 ~ 30℃ during cultivation. Water temperature is an inhibitory factor for gonadal development of oral shrimp, and the higher the water temperature, the faster the development.

If the temperature is too high in summer, the water level can be raised to prevent the water temperature from being too high, which will affect the brooding, hatching and even death of the parent shrimp. When the water temperature is 25 ~ 30℃, it takes 7 ~15 days from fertilization to hatching.

Bait management

Oratosquilla oratoria can feed on fish, shrimp and shellfish, but it is best to use fresh small shellfish to avoid water pollution. It is best to use small pieces of bait and feed them evenly, so as to improve bait consumption and reduce mutual killing due to food grabbing.

According to the characteristics of Oratosquilla oratoria, it is enough to feed 1 time every evening, and the feeding amount is 5% ~ 20% of the parent's weight, which will increase or decrease with the parent's egg holding situation, water temperature, weather, bait type and quality. In the early stage of breeding, the amount of bait can be appropriately increased to meet the nutritional needs of gonad development.

Parent shrimps dig holes when they hold eggs, and basically don't eat, so it is estimated that most parent shrimps should reduce the amount of bait when they hold eggs. In addition, after hatching, the parent shrimp turns to grow, and the food intake increases greatly, which also interferes with other egg-bearing shrimps. It is best to lure them out of the pool with cage nets.

Current management

During the breeding period, it is necessary to patrol the pond to check the water inflow and drainage, the activities and feeding of oral shrimps, the water quality, especially the larval discharge. Once it is found that the parent shrimp excretes the pseudooctopus-like larvae, the larvae are collected in the seedling pond for seedling raising.

Baidu Encyclopedia: Pipi Shrimp