In recent years, factory-cultivated marine fishes have rapidly emerged throughout the country, and shrimp cultured seawater fishes have received less investment in their equipment and materials, and they have gained high benefits and become known. The more upscale saltwater fish, Shijiu, is favored by many farmers because of its delicate meat, good taste, rich nutrition, fast growing speed, less disease, and the best-selling market. The author made shrimp in Rongcheng City Muye Island Fishery Company. The experiment of pool culture of stone oysters has achieved good economic benefits. The measures include the following:
First, shrimp pond conditions and treatment methods.
1 The pool used as a culture stone should be close to the outer sea. The maximum water temperature in the summer shrimp pond should not exceed 29°C, and a size of 15-30 mu should be appropriate. The depth of water is more than 2.0 meters, and the drainage is smooth. No industrial and domestic sewage pollution and harmful substances exist.
2 The bottom of the pool is flat, mainly in fine sand with a diameter of 0.5-1.5mm.
3 Treat aquaculture ponds at the end of December. For ploughing and exposing to the sun, Mushi gives birth to lime 60-80kg to kill harmful bacteria, parasites, and miscellaneous fish.
Second, put fry.
1 The first fertilizer pond began to receive water in mid-March, and the water-bearing time was best chosen at night. It mainly cultivated the bottom of the bottom of the pond, the silkworm. The water level in the pool reached 1.2 meters in mid-April. From the beginning of the influent, apply urea once every 5-7 days, fertilizer pond.
2Fish caught from the shallow sea, wintering through indoor conservation until the end of April, about the size of 150 grams and then put the shrimp pond, before entering the pool with 250ppm formalin solution immersed for 3-5 minutes.
3 The stocking density was 800-1000 tails/mu, which was carefully cultured until September-October. The tail fish weighed more than 500 grams, and the survival rate of the rearing fish exceeded 90%.
Third, aquaculture management.
1 The feeding of bait is mainly based on fresh fish, shrimps, and squid, and is fed with eye shrimp. Feed twice a day, 40% in the morning and 60% in the evening. The daily feeding amount is 8-9% of the fish's body weight. Regular and fixed feeding is required. The quality of the feed must be guaranteed. Do not cast. Corrosion, deterioration, pollution of food.
2 Domestication. Daily 5:00-6:00 am before sunrise and 5:00-6:00 in the evening. First, a small amount of food is used to attract food until most of the pool fish are concentrated and then cast more until they are fed. In this way, after a month of domestication, the stone crickets will feed regularly.
3 water quality management. Before the beginning of June, basically no change of water, only add water, the daily amount of 5-10cm, until added to 2.0 meters high water level. In mid-June, change the water and change the water every day by 10-15cm. The water color of the pool water will not fluctuate too much. During the high temperature season from late July to late August, the water temperature should be measured regularly every day. When the water temperature reaches around 28°C, it should be increased. The amount of water to ensure proper temperature conditions for stone carp promote its rapid growth as soon as it reaches commercial specifications:
4 drug control. Observe the feeding and activities of the fish at any time and in any place, carefully inspect the dead fish found, find the cause, and find out the countermeasures. Every day to strengthen the prevention of disease, should be fed every 2-3 days with 3-5 days of antibiotics mixed with bait. At the same time, piling and hanging medicine bags at the feeding sites for external disease prevention.
Spark
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