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How much is black fish feed

Ice tray small fish (sea fish) costs about 16,000 yuan per ton. Fish meal costs about 10,000 yuan per ton. It is more cost-effective to use fish meal than small fish.

Snakehead carp usually eats

1. Fresh bait: Snakehead carp is a carnivorous fish, and currently small fish are still the main feed, both freshwater and seawater small fish can be used. In the early stage of breeding, large wild fish are chopped and fed, and the daily feeding amount is generally about 5% of the total weight of the fish.

2. Artificial compound feed: Snakehead carp can also be fed with artificial compound feed, the formula of which is: 70% minced fish and shrimp paste, 20% soybean powder, 5% yeast powder, and the rest is multivitamin mineral salts, growth promoters and antibiotics. Feeding should be done at a fixed time, location, quality and quantity. Feed twice a day, once in the morning and once in the afternoon. When the feeding is vigorous, feed again in the evening.

Solution to the problem of black fish breeding feed

The artificially cultured black carp is fed with low-value fresh small fish and shrimp as the main bait.

The feed is powdered feed produced by regular units, with a crude protein content of 45% and crude fiber of 3%. The main raw materials of the feed are fish meal, bone meal, soybean meal, flour, vitamin and mineral premixes, etc. It is supplemented with fresh baits such as mussel meat and small fish.

Snakehead fish are ferocious carnivorous fish and are quite voracious. The prey they prey on varies with the size of the fish. Seedlings under 3 cm in length mainly feed on copepods, cladocerans and chironomid larvae, while seedlings under 3 to 8 cm in length feed on aquatic insect larvae, tadpoles, shrimps and fish fry.

Adult fish over 20 cm in length prey on various small fish and frogs (small fish mainly include crucian carp, silver carp, red-eyed trout, loach and various young fish). Snakehead fish swim slowly, but generally do not chase prey when hunting. Instead, they hide near aquatic plants or other concealed objects, paying close attention to the movements around them. Once they find fish or other suitable bait swimming nearby, they will quickly attack and catch them in one fell swoop.

Snakehead fish have a large food intake and can often swallow live bait that is about half of their body length. The maximum capacity of their stomach can reach about 60% of their body weight. According to autopsy, a 500-gram snakehead fish swallowed eight 10-centimeter-long grass carps in a short period of time. Snakehead fish also have the habit of cannibalism and can swallow individuals of the same species that are less than two-thirds of their own length. The amount of food they eat is closely related to the water temperature.

In summer, when the water temperature is high, they are quite greedy and eat a lot; when the water temperature is below 12℃, they stop eating. Under artificial breeding conditions, when animal feed is insufficient, they can also feed on artificial compound feed such as bean cake, vegetable cake, fish meal, etc.

Additional information

Farming

Stocking technology:

Selection of broodstock pond: The size of the stocking pond should be determined according to the amount of breeding each time. For example, if 50 to 70 pairs can be bred at a time, basically one pair can be stocked per 10 square meters, so a pond of 0.6 to 1 mu should be selected; if only 30 to 40 pairs can be bred at a time, a pond of 0.3 to 0.6 mu should be selected. The main reason is that when the gonads of broodstock are mature, it is best to catch them once and induce spawning once, rather than multiple times.

Because the catch rate of snakehead fish is low. Generally, the pond water is drained to catch them, which is very irritating to the broodstock. If the pond is too large and the broodstock are too concentrated, multiple draining and multiple fishing will not only waste manpower and material resources, but also multiple strong stimulations will cause the gonads of the broodstock to degenerate, affecting the effect of inducing spawning in the next few batches. Therefore, the size of the broodstock pond should be selected based on the matching of the stocking amount in each pond and the breeding amount each time.

The pond should be 1.5-2.0 meters deep, filled with water to 1.0-1.5 meters, and the bank should be at least 0.5 meters above the water surface. If the pond is only 1.0-1.2 meters deep, water can still be filled to 0.8-1.0 meters, and bamboo fences or old fish nets should be inserted around it, 1.5 meters high, to prevent the black snakehead from jumping out of the pond.

Preparation for stocking: Before stocking, clean and disinfect the fish pond, usually by drying the pond. If the silt is too thick, remove the excess silt, leaving about 20 cm. Use 50-75 kg of quicklime per mu to clean the pond, and you can stock the broodstock after 10 days of watering.

A small amount of aquatic plants such as water peanuts and water hyacinths can be cultivated in the pond to provide shelter for the black snakehead and prevent it from escaping. If the selected broodstock is wild, some small fish can be raised in the broodstock pond. The size should be small and not too large.

Key points for stocking broodstock: The key points for stocking broodstock are density, time and sex ratio. The density is generally 100-150 kg per mu, and no more than 200 kg. It should be determined according to the size of the broodstock, generally around 150-250.

The density should not be too high or too low. Too high will affect the activity space of the broodstock, and too low will make it difficult to domesticate, especially for wild broodstock. These will affect the gonadal development of the broodstock. The time is arranged in September. The water temperature in September is 25-30℃, gradually turning from high temperature to cool, which is conducive to the cultivation of broodstock before wintering, and the feeding is relatively vigorous.

Parent fish are caught and transported, especially wild parent fish, and they often do not forage for food when they are in a new ecological environment. However, stocking in September can help them adapt to the new environment and take food actively after more than two months of domestication, so that they can recover their physical fitness. It can also promote the development of gonads and increase the number of eggs carried by female fish. When stocking, male and female fish are basically mixed in a ratio of 1:1.

At this time, it is difficult to distinguish between males and females, so we can only say that the number of broodstock should be slightly larger than the actual need. Before the broodstock are put into the pond, they should be disinfected with 2% to 3% salt water or bathed in 30 mg/kg formalin solution for about 10 minutes, and then put into the prepared broodstock pond after disinfection.

Specialized breeding technology:

1. Fish pond selection: The fish pond should be well ventilated and sunny, with sufficient water resources, an area of ​​1 to 5 mu, a water depth of 1 to 1.5 meters, and some water lilies or water peanuts should be planted around it. It should be surrounded by a net in a lower place. This can prevent the escape of the mullet and provide concealment and shade, creating a good ecological environment which is conducive to the growth of the mullet.

2. Pond cleaning and disinfection After selecting the fish pond, drain the pond water first, use 140-150 kg of quicklime per 667 square meters to dissolve the water, evenly sprinkle the whole pond, and use rakes and other tools to turn the silt and fully disinfect it. One week before stocking the mullet fingerlings, fill the pond water to a depth of 1 meter and apply appropriate basal fertilizer to improve the water quality.

3. Fish stocking There are generally two sources of fish, one is wild and the other is artificially bred. Regardless of the source of the fish, they must be screened before being put into the pond. Fish of basically the same size should be bathed in 3% to 5% salt water for 5 to 10 minutes and then put into the same fish pond.

The stocking density depends on the water source, drainage conditions, and the source of bait fish. Generally, 6,000 to 10,000 fish of 3 to 5 cm in length are stocked in 667 square meters; 4,000 to 6,000 fish of 10 to 15 cm in length are stocked; and about 2,000 fish of about 20 cm in length are stocked. If the water source and drainage conditions are good and the source of bait fish is sufficient, the stocking density can be appropriately increased.

4. Feeding Artificially bred black carp mainly uses low-value fresh small fish and shrimp as the main bait. Because wild or some artificially bred fish species eat live bait, the fish species should be stopped from being fed for one or two days after being put into the pond, and then fed with an appropriate amount of dead bait along the four sides of the pond every morning for domestication, and then gradually moved to one place in the pond for feeding.

After the fish get used to eating dead bait, they should be fed once a day at 9 am and 4 pm. The daily feed amount should be 5% to 10% of the fish's body weight, and should be flexibly adjusted according to weather, water temperature, growth, feeding and other conditions.

The feed is powdered feed produced by regular units, with a crude protein content of 45% and crude fiber of 3%. The main raw materials of the feed are fish meal, bone meal, soybean meal, flour, vitamin and mineral premixes, etc. It is supplemented with fresh baits such as mussel meat and small fish.

5. Daily management Black carp is not prone to disease in natural water bodies or under sparse breeding conditions, but in artificial intensive breeding, if improper prevention and control are carried out, fish diseases will break out, causing serious economic losses. From the author's practice over the past few years, common diseases of black carp include saprolegniasis, skin rot, ascites, gill rot, etc.

If the prevention and control measures are appropriate, the fish will rarely or never get sick. Therefore, during the mullet breeding process, the water quality, fish conditions, leftover baits should be checked regularly to prevent escape, and any abnormalities should be dealt with in a timely manner.

6. Catch the big ones and keep the small ones, and put them on the market in time. Because mullet is a ferocious carnivorous fish, it will kill each other when there is insufficient bait. Therefore, it is necessary to catch the big ones and keep the small ones every month or so. If the size difference is large and the number is large, it can be divided into other fish ponds or cages of the same size.

When the market price is good, the adult fish that have reached commercial specifications can be put on the market for sale. This can not only sell at a good price, but also be beneficial to the growth of small-sized fish.

Reference source: Baidu Encyclopedia - Blackfish

Use earthen ponds to cultivate natural bait, with an area of ​​2 to 4 acres, preferably more than two ponds, and apply fertilizer paste, photosynthetic bacteria and other fertilizers. The peak breeding period of zooplankton should coincide with the time when the fry start to feed. It can be judged from the water color and transparency. When the water color turns lighter, grayish white, or the transparency increases, it is the best time to catch zooplankton.

Feeding should be done in a "four-fixed" way, feeding twice a day, with fresh and living things (such as small fish and shrimps in freshwater and seawater) as the main feed. In the peak feeding season, the feeding amount is about 8% of the fish weight, and the highest can be more than 10%; in the off-season, it is 3%~4%.

If there is not enough live bait, artificial compound bait can be fed. Its ingredients are: wild fish paste, soybean powder, peanut powder, yeast powder, a small amount of adhesive, vitamins and appropriate trace elements. The protein content in the bait must be above 40%.

Additional information:

Black carp breeding technology management:

1. Pond

The black fish pond should have good lighting, ventilation, convenient water inlet and outlet, a depth of 2 to 25 meters, a water depth of 1 to 1.5 meters, a muddy bottom, a silt depth of 10 centimeters, and an area of ​​no more than 2 mu.

2. Water Source

Lake water, reservoir water, well water, etc. are all acceptable, and the water quality should be neutral or slightly alkaline.

3. Inlet and outlet

The inlet and outlet must be equipped with escape prevention nets, and aquatic plants such as water lilies and water hyacinths should be planted in the shallow water beside the pond to block the sunlight. At the same time, it can also purify the water quality and regulate the water temperature. The pond must be cleaned and disinfected before stocking fish.

Reference source: Baidu Encyclopedia - Blackfish

Snakehead fish feed types:

The feed for black carp includes fresh animal feed mainly composed of wild fish and artificial compound feed mainly composed of fish meal.

(1) Fresh animal feed: Snakehead fish are often fed animal feeds mainly composed of fresh wild fish and small shrimps. Wild fish in freshwater include wheatear fish, Q fish, stick flower fish, small crucian carp, etc.; various wild fish in the ocean, small hairtail, green (yellow) catfish, small anchovy, pipe fish, etc. The feed coefficient of freshwater fish is about 4.2-4.5, that is, 4.2-4.5 kg of freshwater fish can produce 1 kg of snakehead fish. The difference lies in the different species of wild fish and the different feed coefficients; the feed coefficient of marine fish is 5.5-6. Some farms use leftovers from livestock and poultry slaughter, earthworms and fly maggots, etc., and even soak dried wild fish before feeding, but the effect is not as good as fresh fish. When feeding with fresh fish, pay attention to the freshness, especially in hot weather, to keep it fresh. Especially for small marine fish, which are quickly frozen and transported to the mainland over long distances, their freshness cannot be guaranteed, or they are not well stored and preserved, and have begun to rot. Snakehead fish will suffer from enteritis and hemorrhagic diseases after eating them. You can also put some wild fish with strong self-breeding ability and parent fish such as crucian carp, carp, and tilapia in the snakehead pond to let them reproduce naturally for the snakehead fish to eat. Some farms hang an insect trap (black light) above the snakehead pond, 1 meter above the water surface, to lure insects, which fall into the water and become food for the snakehead fish.

(2) Artificial compound feed: There are floating pellets, hard pellets and powdered compound feeds. At present, the composition of artificial compound feed for snakehead fish has not been completely solved. It is mainly an active substance required for the growth of carnivorous fish - H factor, which exists in fresh animal tissues but not in fish meal. It plays a very important role in the growth and immunity of snakehead fish.

Feeding technology:

Feeding should be done in a "four-point" way. Timing, positioning, quality and quantity. Feed twice a day, once in the morning and once in the afternoon, from 8:00 to 9:00 in the morning and 4:00 to 5:00 in the afternoon. When feeding animal feed, throw the feed into the feeding basket frame, which is surrounded by bamboo into a square shape and fixed on the water surface. It is about 9 to 16 square meters, and the size depends on the size of the pond. The effect of continuous throwing is good. The throwing force should be large, so that the water surface stirs up water, and the feed floats in the water, which is easy to form a scene of scrambling for food, which is convenient for controlling the feeding amount. When the fish no longer scramble for food, you can stop throwing; when feeding artificial compound feed, you should build a feeding table in the fish pond. The feeding table of the adult fish pond is made of mesh and bamboo into a square shape. The area size depends on the size of the pond. It is placed 1 to 1.5 meters away from the edge of the pond and sunk 30 centimeters underwater. It is appropriately deeper than the feeding table of the fish pond. The feed is made into soft granules or balls, and it is better to throw it in small amounts step by step. The ball feed should not be made too dry to avoid the feed being unpalatable and causing waste. The feeding amount is slightly adjusted according to the size of the snakehead. In the early stage of stocking fish, the fish is small, and small fish are fed at 8% to 10% of the fish weight. As the fish grows, the feeding rate gradually decreases. Generally, when the fish grows to about 150 grams, it drops to 6%, and then basically feeds at 5% to 6% of the fish weight. Feeding compound feed is generally controlled at 5% to 8% of the fish weight, and it is also appropriately adjusted as the fish grows.

Snakehead fish feed types:

The feed for black carp includes fresh animal feed mainly composed of wild fish and artificial compound feed mainly composed of fish meal.

(1) Fresh animal feed: Snakehead fish are often fed animal feeds mainly composed of fresh wild fish and small shrimps. Wild fish in freshwater include wheatear fish, Q fish, stick flower fish, small crucian carp, etc.; various wild fish in the ocean, small hairtail, green (yellow) catfish, small anchovy, pipe fish, etc. The feed coefficient of freshwater fish is about 4.2-4.5, that is, 4.2-4.5 kg of freshwater fish can produce 1 kg of snakehead fish. The difference lies in the different species of wild fish and the different feed coefficients; the feed coefficient of marine fish is 5.5-6. Some farms use leftovers from livestock and poultry slaughter, earthworms and fly maggots, etc., and even soak dried wild fish before feeding, but the effect is not as good as fresh fish. When feeding with fresh fish, pay attention to the freshness, especially in hot weather, to keep it fresh. Especially for small marine fish, which are quickly frozen and transported to the mainland over long distances, their freshness cannot be guaranteed, or they are not well stored and preserved, and have begun to rot. Snakehead fish will suffer from enteritis and hemorrhagic diseases after eating them. You can also put some wild fish with strong self-breeding ability and parent fish such as crucian carp, carp, and tilapia in the snakehead pond to let them reproduce naturally for the snakehead fish to eat. Some farms hang an insect trap (black light) above the snakehead pond, 1 meter above the water surface, to lure insects, which fall into the water and become food for the snakehead fish.

(2) Artificial compound feed: There are floating pellets, hard pellets and powdered compound feeds. At present, the composition of artificial compound feed for snakehead fish has not been completely solved. It is mainly an active substance required for the growth of carnivorous fish - H factor, which exists in fresh animal tissues but not in fish meal. It plays a very important role in the growth and immunity of snakehead fish.

Feeding technology:

Feeding should be done in a "four-point" way. Timing, positioning, quality and quantity. Feed twice a day, once in the morning and once in the afternoon, from 8:00 to 9:00 in the morning and 4:00 to 5:00 in the afternoon. When feeding animal feed, throw the feed into the feeding basket frame, which is surrounded by bamboo into a square shape and fixed on the water surface. It is about 9 to 16 square meters, and the size depends on the size of the pond. The effect of continuous throwing is good. The throwing force should be large, so that the water surface stirs up water, and the feed floats in the water, which is easy to form a scene of scrambling for food, which is convenient for controlling the feeding amount. When the fish no longer scramble for food, you can stop throwing; when feeding artificial compound feed, you should build a feeding table in the fish pond. The feeding table of the adult fish pond is made of mesh and bamboo into a square shape. The area size depends on the size of the pond. It is placed 1 to 1.5 meters away from the edge of the pond and sunk 30 centimeters underwater. It is appropriately deeper than the feeding table of the fish pond. The feed is made into soft granules or balls, and it is better to throw it in small amounts step by step. The ball feed should not be made too dry to avoid the feed being unpalatable and causing waste. The feeding amount is slightly adjusted according to the size of the snakehead. In the early stage of stocking fish, the fish is small, and small fish are fed at 8% to 10% of the fish weight. As the fish grows, the feeding rate gradually decreases. Generally, when the fish grows to about 150 grams, it drops to 6%, and then basically feeds at 5% to 6% of the fish weight. Feeding compound feed is generally controlled at 5% to 8% of the fish weight, and it is also appropriately adjusted as the fish grows.