Black sea bream is a valuable marine economic Fish, and it is also an important mariculture target. Its food complex, mostly fish, shrimp, shellfish and seaweed for food, suitable for growth water temperature 18 °C ~ 25 °C, suitable salt range of 8 ~ 32, the optimal salinity 25 ~ 28. Over the past few years, due to the decline of its resources, the output has been far from satisfying the needs of consumers. At the same time, shrimp disease has brought a greater loss to the breeding industry. In order to increase economic efficiency, the existing shrimp ponds can be fully utilized for the breeding of black seabream. The meat of black oysters is tender and delicious, the sales price is high, the efficiency of pond culture is good, and the market supply is in short supply. This is a good way to solve the poor status of shrimp farming.
1. The selection of the pond is based on the habits of the black storks. The main selection is a hard bottom sediment, a sandy bottom and a gravel bottom shrimp pond, and a small pond with good water quality, no pollution, and good management is appropriate. An area of ​​10 acres ~ 30 acres, water depth of 2 meters or more, changing the water capacity of more than 30%.
II. Dredging and Disinfection In January of that year, the remaining pond water was drained, and the drying pool was sealed. From the end of February to the beginning of March, the pond was dredged to a depth of about 10 cm. Then, the bottom of the pond and the pool dam were completely sterilized with bleaching powder. The amount of mu is 20 kg to 30 kg.
Third, the breeding base of the bait in the pool immediately in the middle of March fertilization of fertilizer and water, to the beginning of April pool conditions are good, the transparency of 35 cm to 40 cm, the variety and quantity of bait is abundant, play a very good role in the early growth of fry.
Fourth, fry stocking
At the beginning of April, the seedlings were placed in ponds. The fry size was 70 g/tail to 100 g/tail, and the amount of mu seed was between 580 and 620 tails. It is also possible to stock some filter-feeding fish such as cockroach and barracuda at the same time, which will help to purify water quality and achieve high yield and high efficiency. After releasing the seedlings, a small amount of feeding was started on the third day, and the fry activity and survival rate were observed.
5. Pre-feeding of bait (from April to mid-May) is mainly based on basic baits. In the middle and late period (from late May to the end of the year), as the water temperature increases, the food intake of the fish increases, and the feeding amount is increased to ensure the fry. Satiate. Feeding requires that the bait is fresh, and that the modified bait is not used, and that the fish, prawns, and crushed shellfish are used as the main ingredients, supplemented with bait, and fixed-point feeding is used to clean the bait. It is used once a day in the early stage and 3 times in the middle and later stages.
Sixth, water quality management In the initial stage of stocking fry, due to less feeding, the water quality is relatively stable, and the water should be changed as little as possible. In the middle and later periods, as the water temperature rises, the amount of water changed. In the later period, due to the increase of feeding amount and the increase of metabolites, 7 kg of calcium peroxide water quality improver can be used per acre to improve the water quality environment.
VII. Disease Prevention In order to control the occurrence of fish diseases, one must feed high-quality bait; second, regular feeding of baits; and thirdly, after each water-receiving, 1 g/m3 of bleach should be used for Quanchiposa.
VIII. Out-of-sale sales Black oyster breeding can be sold out of the pool in mid-October. The average weight of the scorpion during harvest is 520 grams or more. The average output value of the scorpion is more than 5,000 yuan, and the benefit is more than 2,600 yuan. The economic benefit is considerable.
1. The selection of the pond is based on the habits of the black storks. The main selection is a hard bottom sediment, a sandy bottom and a gravel bottom shrimp pond, and a small pond with good water quality, no pollution, and good management is appropriate. An area of ​​10 acres ~ 30 acres, water depth of 2 meters or more, changing the water capacity of more than 30%.
II. Dredging and Disinfection In January of that year, the remaining pond water was drained, and the drying pool was sealed. From the end of February to the beginning of March, the pond was dredged to a depth of about 10 cm. Then, the bottom of the pond and the pool dam were completely sterilized with bleaching powder. The amount of mu is 20 kg to 30 kg.
Third, the breeding base of the bait in the pool immediately in the middle of March fertilization of fertilizer and water, to the beginning of April pool conditions are good, the transparency of 35 cm to 40 cm, the variety and quantity of bait is abundant, play a very good role in the early growth of fry.
Fourth, fry stocking
At the beginning of April, the seedlings were placed in ponds. The fry size was 70 g/tail to 100 g/tail, and the amount of mu seed was between 580 and 620 tails. It is also possible to stock some filter-feeding fish such as cockroach and barracuda at the same time, which will help to purify water quality and achieve high yield and high efficiency. After releasing the seedlings, a small amount of feeding was started on the third day, and the fry activity and survival rate were observed.
5. Pre-feeding of bait (from April to mid-May) is mainly based on basic baits. In the middle and late period (from late May to the end of the year), as the water temperature increases, the food intake of the fish increases, and the feeding amount is increased to ensure the fry. Satiate. Feeding requires that the bait is fresh, and that the modified bait is not used, and that the fish, prawns, and crushed shellfish are used as the main ingredients, supplemented with bait, and fixed-point feeding is used to clean the bait. It is used once a day in the early stage and 3 times in the middle and later stages.
Sixth, water quality management In the initial stage of stocking fry, due to less feeding, the water quality is relatively stable, and the water should be changed as little as possible. In the middle and later periods, as the water temperature rises, the amount of water changed. In the later period, due to the increase of feeding amount and the increase of metabolites, 7 kg of calcium peroxide water quality improver can be used per acre to improve the water quality environment.
VII. Disease Prevention In order to control the occurrence of fish diseases, one must feed high-quality bait; second, regular feeding of baits; and thirdly, after each water-receiving, 1 g/m3 of bleach should be used for Quanchiposa.
VIII. Out-of-sale sales Black oyster breeding can be sold out of the pool in mid-October. The average weight of the scorpion during harvest is 520 grams or more. The average output value of the scorpion is more than 5,000 yuan, and the benefit is more than 2,600 yuan. The economic benefit is considerable.
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