Turbot healthy farming measures

The turbot belongs to the family Aphididae. It is called "Treasure Fish" in our country. It is native to the European Atlantic Ocean and was introduced in the mid-1990s to areas such as Shandong and Fujian, where water temperatures were lower.

In accordance with strict measures for aquaculture management, it will help the healthy culture of turbot and effectively prevent the occurrence of diseases. The following are the six common health breeding measures:

Seed buy

Fry is the most important part of production and should be purchased with more than 5 cm of seed. It is best to purchase it from a national thoroughbred farm or a government-designated nursery farm. The seedlings were required to have a bright body surface, complete body shape, no scars, no darkness, no inflammation, no deformity, no whitening, no parasites, strong activity, and neatness. The seedlings of the same batch were of neat specifications, with the eyes on the left side of the body, and the eyes were green-brown with a bit of melanin and no white smooth side. Conditional health checks can be performed before purchase to confirm the health of the seed.

Reasonably dense

Choosing a reasonable stocking density is critical for the healthy growth of turbot. Under a reasonable culture density, the fish body has a small stress response, a strong resistance to disease, and a rapid growth rate, whereas it easily causes diseases. According to the exchange of pond water and the growth of fry, etc., the necessary adjustments are made to the farming density: 1. When the amount of water exchanged in the pond is less than 6 cycles/day, the density should be properly reduced; 2. The fish is sampled and weighed every month. As a result, it is decided whether to adjust the density; 3. Each time the sub-pool and the pool is poured, it is necessary to fully plan to ensure that the stocking fish are stable in at least one water tank for a period of time, and then perform the sub-pool operation.

Water quality regulation

Turbot aquaculture requires that the water quality is non-polluting. The underground seawater can be pumped directly into the aquaculture pond, and the seawater must be filtered and sterilized. With water culture as a good thing, change the amount of water to maintain 5 to 10 cycles per day. When the water temperature is 20°C, the water exchange volume should be increased in principle. When the water temperature is above 22°C for a long time, it is necessary to take measures to reduce the temperature to prevent the hyperthermia reaction of turbot causing congestive death.

Feed feeding

Turbot feed formula: Usually 50%-60% fresh fish is chopped into fish paste, together with 40%-50% turbot special powder feed, then add 3%-5% fish oil according to different stages, use bait Machine extrusion deployment.

In the early days, the feed amount was 6% of the fish's weight. The specific feeding amount is based on the principle that no residual bait is left. The daily weight of the fish weighing 100 grams was 4 times - 6 times, and the weight of the fish was 150 grams and the number of feedings was 2 times - 3 times daily. When the water temperature is lower than 12°C or higher than 22°C, when the fish eats food poorly, the number of feedings and the amount of feeding and even the bait may be appropriately reduced, and it is particularly noticeable that no bait can be given before the medicinal bath.

Disease diagnosis

The following steps can be used to diagnose simple diseases: 1. Observe the swimming, feeding, and illness conditions to infer whether they are healthy; 2. For affected fish individuals, you can check the body color, body surface, mucous and sputum, and then The above locations were sampled separately for microscopy to confirm whether there was a parasite or bacterial infection. 3. Open the abdominal cavity to observe the lesions of various tissues and organs. Samples of each organ were taken for microscopy to confirm whether there was a parasite or bacterial infection. The above procedure can roughly determine the condition of the disease.

Daily management

1. Turbot is a cold and warm benthic fish. Excellent breeding environment and water quality are the basis for successful breeding. In the daily culture, light, sound interference and human disturbance should be minimized; in the breeding process, the water should be changed and cleaned in time to maintain good water quality and sediment quality.

2. Regularly measure water quality indicators such as water temperature, dissolved oxygen, and ammonia nitrogen, and divide the pool in time to maintain a reasonable density. The specialized area for aquaculture workers, specialized for aquaculture tools and dedicated pools are often sterilized. The aquaculture workshops are regularly sterilized and disinfectant fluids are frequently replaced. During the aquaculture process, care should be taken to minimize the frequency of application to healthy fish, and daily disinfection operations such as tools and workshops should be selected for drugs that are low in toxicity, high in efficiency, and less irritating to fish.

3. Observe the feeding, swimming, growth and development of farmed fish regularly, find diseased fish and dead fish in time, remove sick fish and dead fish for anatomical analysis and microscope observation, analyze the causes, and record them. Diseased fish and dead fish are chosen to be buried or splashed out of lime in areas away from the breeding plant area and should not be discarded.

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