In the entire production process of crab breeding, the mating of crabs and the cultivation of holding crabs are two very important tasks. Doing a good job in mating of crabs and nurturing crabs should be done as follows:
First, the mating of crabs: The male and female crabs were captured from their respective wintering pools and placed in a pool for mating.
1, mating pool: area should not be too large, usually 0.5-2 acres, the bottom of the pool with hard sandy is the best;
2, mating time: 1-3 months;
3, mating water temperature: 7-10 °C is appropriate;
4. Mating Salinity: 18% brackish water;
5, pro crab density: 4-6 per square meter;
6. Pro-crab sex ratio: The ratio of male to female is 3:1.
Second, the cultivation of holding crabs: male and female crabs mating period should not be over, found that about 90% of female crabs hold eggs, they will catch the eggs hatched and put into the cement inside the greenhouse for cultivation.
1. Cultivation pond: The area is 45-50 square meters. The egg-bearing crabs should be washed with bleach powder of 150-200PPM before entering the pool, and then rinsed with fresh water. The brackish water with a salinity of 18 inches should be placed with a water depth of 0.8-1.2 meters.
2, density: 3 per square meter;
3. Water quality: During incubation of crabs, it is necessary to constantly change the water to keep the water fresh and prevent water aging. The amount of water changed every day is 20%-25% of the total body of water; it is blown with a blower 3 times a day for 10-15 minutes each time to ensure sufficient oxygen;
4, water temperature: water temperature is an important factor affecting the rate of embryonic development, high water temperature is rapid development, low water temperature is slow development, the appropriate water temperature for embryonic development is 10-20 °C;
5, bait: mainly for corn, small fish, radish, etc., feeding slightly more than during the winter period. According to the water quality conditions, the waterproof material will be bad;
6, microscopic examination: during the incubation of crabs, it is necessary to constantly use the microscope to check the development of the embryo, when the microscopic examination of the eye when the embryo appears, it is necessary to put the caged crabs into the nursery pool ready to pick seedlings. At this point, the incubation period for the crabs is over.
First, the mating of crabs: The male and female crabs were captured from their respective wintering pools and placed in a pool for mating.
1, mating pool: area should not be too large, usually 0.5-2 acres, the bottom of the pool with hard sandy is the best;
2, mating time: 1-3 months;
3, mating water temperature: 7-10 °C is appropriate;
4. Mating Salinity: 18% brackish water;
5, pro crab density: 4-6 per square meter;
6. Pro-crab sex ratio: The ratio of male to female is 3:1.
Second, the cultivation of holding crabs: male and female crabs mating period should not be over, found that about 90% of female crabs hold eggs, they will catch the eggs hatched and put into the cement inside the greenhouse for cultivation.
1. Cultivation pond: The area is 45-50 square meters. The egg-bearing crabs should be washed with bleach powder of 150-200PPM before entering the pool, and then rinsed with fresh water. The brackish water with a salinity of 18 inches should be placed with a water depth of 0.8-1.2 meters.
2, density: 3 per square meter;
3. Water quality: During incubation of crabs, it is necessary to constantly change the water to keep the water fresh and prevent water aging. The amount of water changed every day is 20%-25% of the total body of water; it is blown with a blower 3 times a day for 10-15 minutes each time to ensure sufficient oxygen;
4, water temperature: water temperature is an important factor affecting the rate of embryonic development, high water temperature is rapid development, low water temperature is slow development, the appropriate water temperature for embryonic development is 10-20 °C;
5, bait: mainly for corn, small fish, radish, etc., feeding slightly more than during the winter period. According to the water quality conditions, the waterproof material will be bad;
6, microscopic examination: during the incubation of crabs, it is necessary to constantly use the microscope to check the development of the embryo, when the microscopic examination of the eye when the embryo appears, it is necessary to put the caged crabs into the nursery pool ready to pick seedlings. At this point, the incubation period for the crabs is over.
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