Green shrimp shrimp breeding method

First, the breeding habits of green shrimp Dichogamous, the main difference is that sexually mature males are more powerful than females in the second step, generally 1.5 times the body length. The spawning season of the shrimp (in the middle and lower reaches of the Yangtze River) is 4 - 9 months, the peak period is 6 - 7 months, spawning water temperature is above 18 degrees. After mating, the shrimps lay their eggs within 24 hours and generally hold eggs at 1000-2500 grains. The eggs of the shrimp are oval in shape, and the produced eggs form clusters attached to the female's stomach feet that have bristles. The continuous swing of the swimming feet provides good oxygen conditions and promotes hatching of shrimp eggs. The entire incubation period takes about 22 - 25 days.

Second, the breeding pool to prepare nursery pool requires sufficient water, drainage and irrigation facilities, no pollution, the area is generally 1 - 2 acres, water depth 1 - 1.5 meters. Remove excess sludge before use and thoroughly clear the pond with quicklime. After the efficacy disappears, filter it with 80 mesh sieve and pour in new water.

Third, the selection of broodstock can be caught in breeding ponds or natural waters. The time is generally in early May. Individuals of broodstock are required to be more than 5 cm, with well-developed gonads or large amounts of eggs, complete limbs, and health-free disease. Non-breeding season male and female ratio of 2: 1 or 3: 1, the breeding season, females can only be moved.

Fourth, the broodstock stocking is best to pick those brooding eggs that have appeared in the eyes of the broodstock, so that the specifications of the breeding of shrimp are neat. Mu broodstock is generally about 10 kilograms, can be directly into the breeding pool. Preferably placed in dilute shallow water pond mesh cages (size 100X70X50 cm), will be selected according to berried shrimp into the carton kg --1 0.5 g, shrimp eggs hatch after extraction cage broodstock Listed for sale.

Fifth, broodstock rearing broodstock broodstock into the pond or cage, feed once a day, feed varieties are crushed snail, oyster meat, vegetables cake, bean cake, bran and other animal and plant food. Per administration accounted for 5% of the total weight of the fear of broodstock --7%, based on the degree of 1--2 hours after eating, and to frequently clean slate cages, so that ligand exchange cabinets external water flow, to maintain good water quality.

Sixth, the cultivation of shrimp When the oviparous egg membrane transparent, the emergence of eye spots, indicating that the juvenile larvae will hatch, this time can be applied to the pool of fermented pigs, cow dung and other organic fertilizer, used to cultivate Zooplankton, cladocera, copepods and other zooplankton are used for shrimp seedlings. After hatching shrimp, every 4--5 days applied to the pool of organic fertilizer, 100 - 150 kg per acre, to keep the number of natural biological bait. If the amount of zooplankton is insufficient, the amount of fertilizer can be increased, or 1.5 to 2 kg of soybean slurry per acre can be poured and fed every day.

7. After the shrimps have been out of the pond for about one month, the larvae become metamorphosed into prawns after repeated molting. When the body length is about 1 cm, the fish should be cultured in a timely manner. Shrimp fishing methods include gauze netting, light trapping, and water trapping.

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