Black abalone breeding

Pingtan County Aquatic Products Farm was meticulously reared by scientific and technical personnel. In the month of January 2000, 1 million pieces of abalone seedlings with a size of more than 1.5 cm were placed, and more than 300,000 black abalones were cultivated. Significant economic benefits were achieved.
First, select the natural conditions to choose the sea flow, seawater fluctuations for the half-day tide, the average annual salinity of 29 ‰ -32 ‰, water 10-29 °C better.
II. Facilities of Hei Pai Chi
1. Nursery pond and rearing pond 1 meter x 8 meters x 1 meter with 38 ports; 2 meters x 8 meters x 1 meter with 25 ports, 4 meters x 6 meters x
There are 15 2 meters long.
2. There are two sedimentation tanks with more than 500 tons, two filtration tanks with 150 square meters, and 8 columns with 8 columns.
3. There are 4 sets of 7.5 kW blowers, 2 sets of pumps, and 6 sets of 12 diesel engines. Others are equipped with nearly 10,000 black cages and 12,000 pieces of Bao Miao tablets.
4. Install a complete set of gas, water and piping.
Third, the development of black abalone technology refers to Taiwan's aquaculture abalone - deep pond plastic cage raising law, which is the third generation of Taiwan's land on the development of improved abalone. The use of overlapping 5, 6-layer black plastic cage breeding, full use of water space, the formation of high-density, gas, water intensive culture. Wei Dian has a low cost of infrastructure and high output per unit area of ​​black abalone. However, there are also certain shortcomings, mainly due to the difficulty in day-to-day management.
1. The stocking density adopts 40 cm x 32 cm x 13 cm polyethylene structure woven cages, and the interior is divided into five layers, which are defined by the size of black borlotti seedlings 2-4 cm, and each layer is limited to black boring seedlings 25-30 tablets. On average, the stocking density per square metre is estimated to be about 80-100 grains.
2. The control of light black abalone habits is nocturnal, so it is suitable for low light and darkness. For this purpose, light intensity is controlled using a two-layer shading method with black mesh.
3. The amount of water flowing in the summer is 400%-500% of the total body of water, and the amount of water added is about 300% in the winter and autumn. In the spring and summer season, the pool is poured every 3 days; the pool is cleared once every 5 days in the spring and summer season; Each change of water should be carried out in combination with the bottom of the cleaning tank, the wall of the tank, and the cage. It is necessary to thoroughly remove the residual baits and excrement for the purpose of rapid operation and shorten the drying time.
4. Feeding bait feed should be based on fresh young kelp and wakame, followed by castorum edulis, goose palm, seaweed, and sarcophagus. It is appropriate to apply 10% to 15% of the body weight of black abalone every day. If there are conditions, it is better to use different fresh seaweeds for better feeding.
When the black abalone was feeding, it first pressed the seaweed leaf face with a huge foot, and then kissed and scratched the surface of the tooth tongue. It was found that the black abalone reached 30% of the body weight at night. The number of foods released from the nest reaches 2-3 times a night. Each time after eating, it takes five or six hours to digest. Because the black abalone has strong hunger-resistance, it does not die in the winter months even if it does not eat food for two or three months. When the water temperature is low, because the seaweed is not easy to corrupt, each feeding can be put into the 3-5 days. But note that if the amount of seaweed input in a small container can not be too much, cut to prevent the bait from blocking the cage hole will cause hypoxia. When the temperature of the water is high, it is necessary to control less cast and diligently cast in order to prevent water quality from deteriorating, resulting in the death of black abalone.
5. Monitoring water quality During the incubation phase of black abalone, water precipitation and filtration must be strictly controlled to ensure good water quality conditions. At the same time, the pool must be cleaned in time, depending on the water temperature and the condition of the pool. Generally, it is stipulated that every 3-5 days should be cleaned once a day and at least 2 times a day, and record the water environment factors such as water temperature, specific gravity, and pH. Such changes.
6. The aeration and oxygenation adopts two sets of 7.5 kilowatts Roots blowers, and they continue to supply air 24 hours a day. To ensure uniform oxygenation, be sure to install an inflatable tube at the bottom of each wharf with a diameter of 1 mm. A hole is drilled at a distance of 3 meters to keep it evenly inflated.
7. Although the disease prevention and control of black abalone is not very serious, it should also be based on prevention. For this reason, Baochi and the cage should be cleaned once every 3-5 days to remove residual baits, excrement and dead abalone. In particular, dead abalone have a great impact on water quality. At the same time, the requirements for aquaculture in cages are removed once a day. During the cultivation, Baochi also needs to regularly use a variety of bactericidal drugs such as topiramycin or potassium permanganate, insisting on frequent soaking and scrubbing to achieve better disinfection and disease prevention.
IV. Development results After three years of development, the black abalone was cultivated and obtained the finished abalone specification of 5-6 cm, with a total number of 120,000 grains, 3-4 centimeters with more than 200,000 grains, and a total output value of more than 2 million yuan. Significant economic and social benefits.

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