How to judge the weight of floating head of fish
To judge the weight of fish floating head, it is mainly judged according to the time when the fish starts floating head, the location of floating head, the size of floating head water surface and the type of floating fish.
1. Dark floating head. Generally occurs in the morning but the sun has not yet come out, fish in the middle of the pond and the upper wind on the surface of the activity, visible bursts of spray. At this time, the dissolved oxygen in the pond water is 2~3 mg/L, which belongs to normal floating head.
2. Flirty head. Most occur at dawn, fish in the middle of the pond and on the surface of the wind, wild fish floating head in the pool, the area is not very large, floating head fish cluster, frightened quickly sink. At this time, the dissolved oxygen in the pond water is about 2 mg/L, which is also a normal floating head.
3. General floating head. The floating head starts 1~2 hours before dawn. The fish in the pond are mostly concentrated in the middle of the pond. The floating head area is relatively large. When there is no alarm, the fish sometimes move to the side and sink rapidly after being frightened. The wild fish in the pool have been in a state of heavy floating head, and a small number of wild fish can be found out of balance, but no dead fish. At this time, the dissolved oxygen in the pond water is below 2 mg/L, which belongs to the normal floating head limit.
4. Heavy floating head. Floating head start time around midnight, floating head from the middle of the pond began to spread to the pool, almost all of the pond fish are in a state of hypoxia, frightened after not sinking. Wild fish have been found dead by the pool. At this time, the dissolved oxygen in the pond water is 1~1.5 mg/L, and the situation is very dangerous. High energy and fast oxygen should be sprayed to the pond water surface immediately.
5. Fantang. The floating head started earlier and the water quality was bad, and the fishy smell of the pond could be smelled on the shore. All the fish in the pool float, breathe rapidly, swim weakly, and find that the number of dead fish in the pool gradually increases. At this time, if oxygen measures are not taken in time, the fish in the pond are in danger of being destroyed.
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Mixed shrimp and pasta
Ingredients: (1 serving) 2 fresh shrimps, 1 egg, some Japanese greenhouse cucumber, some bamboo shoots, some Japanese fish fillet, 1 Sapporo miso dough. Practice: 1. Cucumber slices. Eggs cooked, shelled, cut in half lengthwise. Wash shrimp, cook and fish out. Heat a pot of water, add dough and cook for 4 minutes, stirring occasionally. Remove from heat and stir in the complimentary seasoning powder. 2. Place seasoning oil in a large bowl, then pour in noodles and soup, mix well, serve with prawns, cucumber and bamboo shoots
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Be careful when eating crabs with allergies
Autumn is the season for crabs to come on the market. The meat of crabs is tender and plump, especially male crabs in September and female crabs in October. The meat is thick and yellow, and the taste is delicious. However, Chinese medicine experts remind you not to eat too many crabs at a time, and people with allergies have to resist the temptation of this delicacy. Lin Hexi, chief physician of Quanzhou Hospital of traditional Chinese Medicine, said that the crab is salty and cold, and it is easy to accumulate cold in the abdomen to cause disease. You should not eat too many crabs at one time, and you must use pungent and warm ginger, spring onions, vinegar and other supplementary food. Patients with coronary heart disease, hypertension and hyperlipidemia should not eat crab roe or eat less crab meat.
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