Is puffer fish poisonous? What are the daily management points of farming?

Puffer fish, also known as bubble fish, puffer fish, belly fish, which has vividly explained its appearance, whenever it is in danger, it will bulge its belly, put up small thorns to protect itself, the appearance is really cute. Is the puffer fish toxic? What are the main points of daily management of aquaculture?

Is puffer fish poisonous?

Puffer fish is poisonous. Almost all kinds of puffer fish contain tetrodotoxin (TTX), a neurotoxin that can kill people by eating 0.5mg-3mg. The toxin is heat-resistant and can not be destroyed for 8 hours at 100 ℃ and 1 hour at 120 ℃. Neither salting nor sun exposure can destroy the toxin. Toxin mainly exists in gonad, liver, spleen, eyes, skin, blood and other parts of puffer fish. Ovary and liver are highly toxic, followed by kidney, blood, eyes, Gill and skin. Testes and meat are mostly weak or non-toxic. When cooking puffer fish, we must strictly and carefully remove the internal organs and eyes of puffer fish, remove fish gills, peel off fish skin, remove tendons and blood, and wash them repeatedly with clean water. Puffer fish meat is particularly delicate, delicious and nutritious. Its medicinal value is very high, from the toxins of its liver and ovary, tetrodoxin, tetrodotoxin, tetrodoxin and other valuable medicinal materials can be extracted.

Second, what are the main points of daily management of puffer fish farming?

1. Patrol the pond

Keep patrolling the pond every day, observing the activities of puffer fish, water color and water quality in breeding ponds, and checking breeding facilities. Water temperature, pH value, dissolved oxygen, ammonia nitrogen and transparency should be measured regularly every day and recorded.

2. Feeding

After the puffer fish is put into the pond, there are certain requirements for the water temperature, and the puffer fish still has a certain feeding ability at 15 degrees, so it should be fed regularly. In the initial stage of stocking, let the puffer fish form a fixed-point feeding habit, the bait should be wet pellet bait, it is best to feed it now, the general feeding amount should reach half of the puffer fish's body weight, at least twice a day. When the water temperature drops below 12 degrees, the food intake of puffer fish decreases significantly. When the water temperature reaches 10 degrees, the puffer fish basically will not eat, at this time to stop feeding and increase the appropriate water temperature. When throwing food, we should let the puffer fish eat well and fish out the remaining bait in time to prevent water pollution.

3. Disinfection and disease prevention

The puffer fish seedlings should be disinfected before they are released, and the parasites and germs on the surface of the seedlings should be removed. Prevent injury during growth, infect the wound, and give bacteria a chance to invade. Puffer fish overwintering because the density is too high, very prone to disease. The most common diseases of puffer fish culture in ponds are water mold, rot, enteritis and other diseases. When breeding, it is mainly to prevent, disinfect every half a month or once a month, use antibiotics and other drugs to disinfect the surface of puffer fish, and regularly mix antibiotics such as dysentery, Scutellaria baicalensis, Cortex Phellodendri, Radix Isatidis and andrographis paniculata in feed. Fish that have been found to be sick should be fished out in time and treated in isolation to prevent the spread of fish disease.

4. pour the pool and change the water.

Changing water in the pond can reduce the amount of waste and bacteria produced by the metabolism of puffer fish in the water, and improve the growing environment of puffer fish. The dumping of the pond is beneficial to the periodic comprehensive disinfection of the fish pond and the removal of pests and parasites in the pond. Improving the environment of pond water can effectively reduce the incidence of fish disease and improve their survival rate during overwintering. The pond is usually poured once in about 30 days, and also needs to be poured once before overwintering to carry out a comprehensive and thorough disinfection of the pond.

5. Fishing

When the breeding density is too high or there are individual differences, it should be caught in time and cultured in a separate pond. The domestic market specification of puffer fish is more than 400 grams, so it is necessary to start fishing and sales according to market demand in order to improve economic efficiency.