CATDOLL : CATDOLL: How many mandarin fish fry should be placed in one acre of crab pond?

1. How many mandarin fish fry should be placed in one acre of crab pond?

Eight thousand fish fry, ten tons of feed, the normal harvest is about six thousand kilograms. If you want to raise fish with high yield, one pond is not enough, it is better to have three ponds. First, put 30,000 fish fry in one pond, and divide them when they grow to about half a kilogram. This way the yield is high.

There is no specific explanation in your answer. How many mandarin fish should be released?

2. How to treat formaldehyde poisoning in mandarin fish fry?

1. Symptoms of formaldehyde poisoning in the human body can be divided into three types:

1. Symptoms of severe poisoning: Symptoms of severe poisoning include the presence of pulmonary edema in the lungs, fourth degree laryngeal edema in the throat, and severe hypoxemia in the blood.

2. Symptoms of moderate poisoning: chest tightness, frequent coughing, expectoration, difficulty breathing, and even dry and wet cracking sounds, then you need to see a doctor as soon as possible. If the chest X-ray shows that the lung texture is solidified, and the changes that occur are leaf-shaped shadows or some scattered small black spots, it means that you have been poisoned by formaldehyde and have reached the level of moderate poisoning. In addition, mild and moderate hypoxemia symptoms will also appear during hemolysis.

3. Symptoms of mild poisoning: If you feel unwell, have irritation in your eyes, conjunctival congestion, hoarseness, difficulty breathing, and your breathing sound is obviously louder than usual, and if you happen to have just renovated your house, then it is likely that you have mild formaldehyde poisoning. After an examination at the hospital, if you find one or two degrees of throat edema, or symptoms of acute bronchitis, then it is basically certain that you have been poisoned by formaldehyde. In addition, mild formaldehyde poisoning will appear as more and coarser textures in the lungs under X-rays, which is a typical symptom of acute bronchitis from a medical point of view.

2. Patients with symptoms of poisoning can be treated with the following methods:

1. If you find that your symptoms are consistent with those of mild formaldehyde poisoning, you should immediately leave the environment that may contain formaldehyde and rinse your whole body with plenty of clean water, change clothes contaminated with formaldehyde, and wash with soapy water or 2% sodium bicarbonate solution.

2. If symptoms of moderate formaldehyde poisoning occur, the patient should be allowed to inhale 0.1% dilute ammonia water. If you want to quickly remove throat edema and pulmonary edema caused by poisoning, it is recommended to use sufficient glucocorticoids for a short period of time in the early stage of treatment.

3. If you accidentally come into contact with a large amount of formaldehyde in a short period of time and experience respiratory irritation, you need to be observed for 2 days and avoid activities that may worsen your condition.

4. Maintain airway patency through reasonable oxygen therapy, administer bronchial spasmolytics and defoaming agents, and perform tracheotomy if necessary.

5. Treat symptomatically, prevent infection, and prevent complications.

Formaldehyde is a colorless gas with a pungent odor. Different levels of pollution and different people will cause different levels of harm, ranging from mild asthma, cough, cold, etc., to more serious teenage memory and intelligence decline, pregnancy syndrome, newborn chromosome abnormalities, leukemia and other cancers. By circulating indoor air and spraying herbal Dialin, the content of harmful substances in indoor air can be reduced, thereby reducing the harm of such substances to the human body.

3. How big is the mandarin fish when laying eggs?

Mandarin fish matures early. Male fish can reach sexual maturity at the age of 1, and the smallest mature individual is 15.6 cm and weighs 78 grams. Female fish generally reach sexual maturity at the age of 2, and the smallest mature individual is 21 cm and weighs 250 grams. The average number of eggs carried by an individual is 30,000 to 200,000. Its natural breeding season is from mid-May to early August, and the peak spawning period is from June to July. During this season, the parent fish gather in the spawning grounds and lay eggs in the gentle flowing water. Spawning activities are mostly carried out at night or before dawn, and spawning behavior is rarely found during the day.

Does anyone know how to solve the problem of mandarin fish not being able to lay eggs?