CATDOLL : CATDOLL: What do seven-star fish fry eat to grow fastest?

1. What do seven-star fish fry eat to grow fastest?

Seven-star fish is a typical carnivorous fish that likes to eat animal feed. In the fry stage, it can be fed with water fleas, artemia, earthworms, minced meat, egg yolks, etc.

In the adult fish stage, they can be fed earthworms, maggots, mealworms, snail and clam meat, silkworm pupae, fish and shrimp, animal meat and offal, or plant-based feed such as corn flour, peanut flour, bean dregs, rice, and noodles.

The seven-star fish with a body length of about three to eight centimeters feed on ancient larvae of aquatic insects, shrimps, tadpoles, and fish fry; and the adult fish with a body length of more than twenty centimeters feed on various small fish and frogs.

The food that seven-star fish eat varies according to the size of the fish.

2. Seven-star fish fry hatching technology?

1. Place the seven-star fish fry in a water tray, stir the water with your hands to create a vortex. If the fry can swim against the current along the edge of the tray, it means the fry are of good quality; if most of the fry are caught in the vortex and unable to swim, it means the fry are of poor quality.

2. At the breeding pond of seven-star fry, suddenly wave your hand towards the school of fish. If the school of fish quickly dodges, it means that the fish are in good health; if the fish react slowly, it means that the fry are in poor health.

3. Place the fry in a water tray and blow the water surface. If the fry swim against the wind, they are healthy, otherwise they are poor.

4. Place the fry in a white bowl and pour out the water. If the fry struggles vigorously at the bottom of the bowl with its head and tail bent like a coil, it indicates that the fry is strong. If it struggles weakly and sticks to the bottom of the bowl with only its head and tail moving slightly, it is a poor fry.

1. Pond cleaning and disinfection: First, clear out the sludge in the fish pond. 7-8 days before the fish are introduced into the pond, disinfect the pond with 190-120 kg of quicklime per mu, or disinfect the pond with 10-15 grams of bleach per cubic meter of water 4-5 days before the fish are introduced into the pond.

2. Fish disinfection: Fish must be disinfected before stocking. You can use 3% water for 3-5 minutes or 15-20ppm for 15-20 minutes. The immersion time should be flexibly controlled according to the tolerance of the fish;

3. Tool disinfection: The method is to expose it to the sun, or use drugs to disinfect it, such as soaking it in 50ppm or 200ppm bleach or quicklime for 5 minutes before use;

4. Feed disinfection: Rinse the fresh feed first, then soak it in 50ppM or 100~200ppm bleach for 5 minutes, or soak it in 20~200ppm chlorine dioxide solution for 10~20 minutes, or feed it with 0.01~0.1ppm chlorine dioxide solution for 8 hours to 3 days before feeding it to fish;

5. Disinfection of feeding area: During the epidemic season of fish diseases, every 7 to 15 days, after the fish have eaten, use 250 grams of bleach or 1000 grams of quicklime dissolved in appropriate amount of water and then sprinkle it near the feeding area;

6. Water quality management: During the breeding process, the water quality should be observed frequently, and water should be filled and replaced in time, or micro-flow water should be implemented to maintain good water quality and prevent water quality from deteriorating;

7. Drug prevention: In the season when fish diseases are common, spray drugs and feed medicated bait to prevent both internal and external diseases to control the occurrence of fish diseases. Spray chlorine dioxide or quicklime or strong chlorine or bleach or a mixture of copper sulfate and ferrous sulfate 1 to 2 times a month, alternate between bactericides and insecticides, and feed medicated bait while spraying drugs. The medicated bait is generally made of antibiotics, chloramphenicol, and furan drugs mixed with feed and then fed for 3 to 7 consecutive days;

8. Avoid damage: Damaged fish are more susceptible to disease, so during the process of catching, transporting and transferring fish to ponds, follow strict operating procedures, be meticulous and cautious, and try to avoid damaging the fish to prevent infection by bacteria.

3. How many eggs does a seven-star fish lay?

500~1000. Seven-star fish only lays eggs once a year. Seven-star fish is an oviparous fish. It can reach sexual maturity in two winters under natural conditions and one winter under artificial breeding conditions. The spawning period is from April to June, especially in May. It only lays eggs once a year, about 500~1000 eggs each time. The eggs are light yellow and sticky, and they are attached to water plants for hatching.

About 500 pills.

The age of initial sexual maturity for seven-star fish is 2 winters, while that for artificially farmed fish is 1 winter. The relative egg-bearing capacity is about 500. The reproductive period is from April to June, with the peak spawning period from May to July, and the breeding water temperature is 18 to 28 degrees Celsius.

Spawning occurs several times a year, with oil balls in the yolk, and buoyant eggs. The testes are close to both sides of the ventral surface of the swim bladder, and are brown-yellow in color. During the breeding season, the male and female broodstock chase each other in estrus, the female ovulates, and the male ejaculates on the eggs, which gather into clumps and float on the water surface.

Parent fish have the instinct to protect eggs until the fry are hatched. The fry just out of the shell face up, and can swim in groups on the 4th day after hatching. On the 25th day, their appearance and living habits are the same as those of adults.

4. Can seven-star fish fry be fed too much?

No, overfeeding and excessive stocking density are the main causes of fish fry death. Too high a stocking density and excessive feeding at the beginning will cause some fish fry to suffer from temporary gastrointestinal discomfort. In addition, there are too many fish fry and they are not well cared for, so problems arise.

In fact, if they were discovered in time and isolated and treated, they basically should not have died. The method is very simple, just soak them in oxytetracycline and stop eating for one or two days and there will be no problem.

If you eat too much, seven-star fish will die. Fish will not eat too much. Generally, fish will show symptoms of abdominal distension and vomiting of food after swallowing.

5. How long does it take for seven-star fish fry to grow up and reproduce?

It takes a year and a half to reproduce

1. The breeding period of seven-star fish is 12-18 months. Its reproductive period is from April to June each year, and the peak spawning period is from May to July. The water temperature during breeding is more suitable at 18-28℃.

2. Seven-star fish are bottom-dwelling fish, mainly living in rivers, lakes, ponds and other waters with lush aquatic plants. Seven-star fish like darkness and are nocturnal. They usually lurk in aquatic plants or caves during the day and come out to move around and forage at night.

6. How to breed seven-star fish in high density?

Breeding method: the stocked seven-star fish fry must be disease-free, healthy, and in good shape. Fry with a body length of less than 5 cm should be first placed in a cement pool with an area of ​​less than 10 square meters and a water depth of 20-50 cm. 2000-5000 fry with a body length of 2 cm can be placed per square meter. When the fry grow to a body length of more than 5 cm, they can be transferred to large ponds for breeding, with 20-50 fry per square meter, and up to 100 fry.

Feeding

Seven-star fish is a typical carnivorous fish, and likes to eat animal feed. In the fry stage (body length less than 4 cm), it is mainly fed with water fleas, Artemia, water earthworms, and can also be fed with minced meat, egg yolk, etc. As the fish grows up, its feeding habits also change. It can eat both animal and plant feeds, but still prefers animal feeds. Animal feeds include: earthworms, maggots; mealworms, snail and mussel meat, silkworm pupae, fish and shrimp, livestock meat and offal, etc. When animal feed is scarce, it also eats plant feeds, such as corn flour, peanut flour, bean dregs, rice, noodles, etc. Under artificial breeding conditions, especially in large-scale breeding, it is particularly important to use artificial compound feed to raise seven-star fish. In the fry stage, feed powdered compound feed (preferably crushed by a micro-crusher, with strong viscosity) with a crude protein content of 40-45%. After growing to 10 cm, feed formed granular feed with a crude protein content of 38-42%. No matter what kind of feed is fed, it is necessary to feed the fish at a fixed time, quantity, quality and location, and set up a feeding table in the pond. The daily feeding amount should be determined according to the water temperature, weather changes and the fish's feeding situation. Generally, it is 3-10% of the fish's body weight. Feed twice a day, once at 8-9 am and once around 6 pm. Feed should be fed in appropriate amounts, based on the fish being full, to prevent residual feed from polluting the water quality.

Water Quality Management

During the breeding period, the water quality must be kept clean and new water must be added regularly. The amount of water replaced each time should account for no more than half of the pond water, and dirt and residue should be discharged in time.