CATDOLL : CATDOLL: How to keep catfish in a fish tank

Ducks cannot be kept in fish tanks and are usually kept in ponds.

1. Pond requirements

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The pond area can be between 2 and 10 mu, the water depth can be between 1.5 and 2 meters, the pond bank must be solid and leak-proof, drainage and irrigation are convenient, and the thickness of the silt at the bottom of the pond must not exceed 20 centimeters.

2. Stocking pattern and density

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2.1 Specialized pond culture

Fish farming is the main method. In order to regulate water quality, a small amount of silver carp and bighead carp can be raised per mu. The stocking density depends on the pond conditions and management level. Generally, 800 summer flower fish of about 3 cm in size and about 50 one-year-old silver carp and bighead carp of 50g per mu can be raised.

2.2 Mixed culture of fish and crabs

In the fish pond, river crabs can be properly raised. Some of the feed that the fish have not finished eating and sinks to the bottom of the pond can be ingested by river crabs, allowing them to act as "scavengers". This can not only reduce the deterioration of water quality caused by the rotting of residual feed, but also increase the breeding efficiency. Generally, 600 to 800 fish of about 3 cm in length can be raised per mu, and the number of silver carp and bighead carp is the same as that of "special breeding". About 100 to 150 one-year-old crabs with a specification of 120 to 200 per kg can be released per mu. At the same time, water peanuts can be appropriately raised on the surface of the pond, and water plants (Vallis or Hydrilla verticillata) can be planted at the bottom of the pond.

3. Feed and feeding method

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Fish are ferocious fish, and they feed on live fish in natural waters. However, in artificial breeding, if live bait is still fed, the breeding cost is high, and it is troublesome to equip a special feed fish breeding pond and ensure the palatability of the feed fish. Experiments show that after domestication, the fish's feeding habits change from eating live fish to eating dead fish. Therefore, the fish feed can be live fry in the early stage and fish pieces in the later stage. The feeding habits of fish can be domesticated when the fish is about 5 cm long. Before the body length is 5 cm, live fry with palatable food should be fed.

3.1 Preparation of live feed

The live bait required by the fish in the early stage can be the fry of the "four major carps". There are two ways to prepare and feed live bait. One is to cultivate directly in the fish breeding pond. Half a month before the fish are put into the pond, 150,000 to 200,000 domestic fish are released in each acre of pond, and they are cultivated according to the requirements of summer flower fish cultivation. When the domestic fish fry grows to 1.5 cm, the fish fingerlings of about 3 cm are directly put into the pond to feed the domestic fish fry. Powdered feed should continue to be fed in the pond to cultivate feed fish, so that the feed fish and the fish grow "synchronously" to ensure that the fish have palatable bait at any time. When the fish grows to about 5 cm and the live bait in the pond can no longer meet the needs, the feeding habits are domesticated and palatable fish pieces are fed; the second is to use a special pond to cultivate live feed. In the breeding pond, a temporary breeding area of ​​about 10% of the total area of ​​the pond is enclosed with a net, and fish fingerlings of about 3 cm are placed. Live fry are first fed, then a mixture of fry and fish pieces, and finally fish pieces are completely fed. After the conversion of food habits is completed, the fence is removed. Compared with the two methods, the former is more convenient for early breeding, but domestication is relatively difficult, while the latter is the opposite.

3.2 Domestication

Choose the pond side with less silt at the bottom of the pond, facing south and sunny, as the feeding area, and conduct taming twice a day, at 9 am and 4 pm. When taming, first pour water into the feeding area, then start feeding after a few minutes, and repeat the pouring of water and feeding, and repeat this cycle to make the fish form a conditioned reflex. As long as water is poured into the feeding area, they will quickly gather in the feeding area. The best bait at the beginning is a mixture of live fish fry of suitable size and fish paste or fish pieces made from small fish, and then transition to using only fish pieces.

3.3 Feeding

After the conversion of diet is completed, fish nuggets should be fed at regular times, fixed locations, and fixed quantities, usually once in the morning and once in the afternoon. Before feeding, "sprinkle water to attract fish" and wait for the fish to gather in the feeding area before feeding fish nuggets. The feeding amount depends on the weather, water temperature, and the fish's eating habits. Generally, the daily feeding amount is 5% to 8% of the fish's body weight. If frozen fish nuggets are mainly fed, fresh fish nuggets should be fed at regular intervals, or multivitamins and vitamin C should be added to the frozen fish nuggets.

4. Daily management

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4.1 Strengthen water quality regulation

The daily management methods in fish farming are basically the same as those in other fish farming. In farming, attention should be paid to controlling the water quality, keeping the water fresh, rich in dissolved oxygen, and the transparency should be controlled above 30cm. In the early stage, water injection is the main method, and water can be added every half a month to make the pond water deepen as the fish grow. In the middle and late stages, water should be changed in time, and quicklime should be sprinkled into the pond regularly. Composite biological agents can also be applied to improve water quality. Oxygen should be added in time in hot and humid weather to prevent hypoxia from floating.

4.2 Timely distribution

Fish are fierce in fighting for food, have a large appetite, and grow fast, but they vary greatly from individual to individual. Therefore, if screening and separation are not carried out in time during breeding, the big fish will fight for food fiercely, eat more, and grow faster, while the small fish will not be able to grab food and grow slower. At the same time, there will be a phenomenon of "small fish cannot eat big fish pieces, and big fish cannot eat small fish pieces". In the end, the weight of fish raised in the same pond differs by more than 10 times. Therefore, separation should be carried out in time according to the growth situation during the breeding process.

4.3 Disease control

Fish pond farming has just started, and no specific diseases have been found yet, but attention should be paid to disease prevention during the farming process. First, 75-100 kg of quicklime per mu should be sprinkled throughout the pond before use to improve the pond bottom quality and kill bacteria. Second, fish fingerlings should be soaked and disinfected with salt water before being put into the pond. Third, feed fish should be safe and hygienic, meet relevant requirements, and the feeding area should be disinfected regularly with bleaching powder or strong chlorine.