CATDOLL : CATDOLL: Can I raise forktail and wheatear together?

1. Can forktail and wheat dace be raised together?

Forktail and dace can be co-raised. According to the relevant public information, dace is a bottom-feeding omnivorous fish that can effectively process the excrement and residual feed of poultry, livestock and fish, improve the water quality, and forktail can survive well. Forktail fish generally refers to forktail t, also known as channel catfish, clamp fish, spotted forktail, etc.

2. Can yellow croaker and native grass carp be raised together?

Hello, I personally think that yellow croaker can be raised together with native grass carp, and the effect should be very good.

3. Can yellow croaker be raised together with dace?

Yellow bone fish can be mixed with dace. Yellow bone fish is an omnivorous fish with strong reproductive capacity and fast growth. It can also be mixed with non-carnivorous fish such as silver carp and dace. As long as it is properly raised, the benefit of raising 1 mu of yellow bone fish is 6-8 times that of raising ordinary fish.

4. Can dace be cultured in cages?

I. Preliminary work 1. Introduction to the model. In the practice of artificial breeding of yellow eels, there are many models such as cement pond breeding, soilless water breeding, earth pond breeding, rice field breeding, rice field cage breeding and pond, ditch, river, reservoir cage breeding. Because cage breeding of eels in ponds, canals and other waters has the advantages of low cost, easy domestication, fast growth, easy catching, and comprehensive benefits, it has been widely adopted by farmers. However, some backward breeding models have been eliminated due to factors such as low economic benefits. 2. Cage production. The cages for breeding yellow eels generally use polyethylene twisted wire mesh with a mesh size of 0.8 cm. The cage specifications are generally 4-6 square meters, 2 meters long and wide or 3 meters long and 2 meters wide, and 1.2 meters high. The cage specifications should not be too large. If they are too large, the number of seedlings released will be large, which will be inconvenient for domestication, and emergency reactions will occur easily, making it inconvenient to catch. 3. Site selection. In order to ensure high yield and high efficiency of the breeding industry, the site selection should be appropriately adhered to the standards. Site selection requirements: sufficient water source, good water quality, no pollution source (untreated domestic sewage cannot be used to raise eels), drainage and irrigation, convenient transportation, electricity support, and self-contained water inlet and outlet channels. No water inflow from ponds. Eels can be raised in ponds, ditches, reservoirs and other waters. An area of ​​3-5 mu is the most suitable. (In the actual breeding process, there are also large-scale intensive fish ponds with cages to achieve better breeding results), with a water depth of more than 1.5 meters. 4. Cage erection. Cage eel breeding is a high-density breeding. The oxygen consumption of eels and aquatic organisms is large, and the oxygen consumption of organic matter in the water body is also large. Therefore, the density of cages should not be too large, generally not exceeding one-half of the total water surface. Spacing distance: The row spacing is based on the ability to travel the bait-casting boat. The cage spacing is preferably more than 50 cm to facilitate water exchange. The cages are arranged vertically, that is, the cages are facing each other. Some farmers arrange the cages horizontally, that is, the cages are next to each other, which is not conducive to water exchange and operation. It is best to be north-south oriented. The water depth of the cage is about 70 cm, and the height of the water surface is 50 cm. Use wooden stakes and wire to fix the cage. The wooden stakes are driven at both ends of the shore, and the wire is fixed on the wooden stakes. The height of the wire is level with the upper line of the cage, and the rope of the cage is fixed on the wire. 5. Clean and disinfect the pond. The old pond with a long history has thick silt and humus at the bottom, which is easy to breed various pathogens and easily cause eels to become ill. This kind of fish pond must be desilted in winter and spring. If it is really unable to desilt, at least the water must be drained to make the bottom ice and sun-exposed to reduce the harm. All ponds used to raise eels need to be thoroughly disinfected before planting. There are many kinds of disinfectants, and the most commonly used is quicklime. Quicklime dry pond disinfection can be done by dry method or with water. Dry method: drain the pond water, leaving only 5 cm of water depth, dig several pits evenly at the bottom of the pond, pile quicklime in the pit to dissolve, and then sprinkle it evenly in all parts of the pond while it is hot, with a dosage of 150 kg/mu; clear the pond with water; that is, the water depth is about 1 meter, use 200 kg of quicklime for every 667 square meters, and sprinkle the water evenly in the pond. Quicklime pond cleaning and disinfection has many functions. First, it can effectively kill pathogenic microorganisms, parasite eggs and various harmful organisms in the water body. Second, it can regulate water quality and make the aquaculture water slightly alkaline, which is conducive to the growth and reproduction of aquatic organisms. Third, it can increase the calcium element in the water body. Fourth, it is conducive to fertilizing water. Quicklime can release nitrogen and phosphorus adsorbed in the bottom mud, thereby improving water quality. It should be advocated to vigorously use quicklime. Drugs such as sodium pentachlor and chlorpyrifos are banned drugs, which do not meet the requirements of pollution-free aquaculture and shall not be used for pond cleaning and disinfection. 6. Soaking the cage. Newly made cages need to be soaked in the pond for two weeks. On the one hand, the toxins produced by the polyethylene mesh are eliminated, and on the other hand, various algae are attached to the cages to make the texture softer, so as to prevent the eels from being injured and infected with diseases. 7. Transplant aquatic plants. After the cages are arranged, aquatic plants should be transplanted into the cages 20-30 days before planting for the eels to inhabit. There are many varieties of aquatic plants, including revolutionary grass (water peanuts), water hyacinth, oil grass, etc. According to the experience of various places, the author believes that it is better to choose revolutionary grass and oil grass for transplantation. Revolutionary grass accounts for 80%, and oil grass 20%. Revolutionary grass grows vigorously in the early stage, withers and decays in the later stage, and oil grass does not decay for many years. It can be used as the dominant variety of aquatic plants in the cages in the later stage. Thus, the cage eels always have better habitat conditions. Large-scale eel farmers often have leaks due to the large number of cages, and escape from seedlings occurs from time to time. Eels are afraid of deep water. If they escape into the pond outside the cage, they are often drowned. To prevent this phenomenon from happening, some revolutionary grass can be transplanted around the pond for the escaped eels to live in. You can also feed and tame the eels at the revolutionary grass. After the cage is repaired, use a scoop net to capture the eels and put them back into the cage for breeding. Aquatic plants transplanted inside and outside the cage must be soaked in 1000 times dichlorvos for 5-6 minutes to prevent leeches (locusts), sand leeches and other parasites from forming hidden dangers. If the pond is disinfected earlier, povidone iodine or S high poly iodine source S high poly iodine should be sprayed in the cage one day before the seedlings are placed. To cultivate water quality and promote the growth of aquatic plants in the cage, urine can be appropriately added with "802" to provide a good ecological environment for the eels after entering the cage. 2. Seedling selection and release 1. Seedling selection Artificial breeding of yellow field eels is still in the stage of scientific research results identification and development. There is no supply of large-scale breeding yellow field eels at home and abroad. The seedlings of cage eels still rely on natural resources. Therefore, it is particularly important to recognize and understand the varieties and quality of natural yellow field eels. There are three main varieties of yellow field eels in the Yangtze River Basin: the first is deep yellow large spots. This eel has a fast production speed and can gain weight by 5.6 times; the second is the green eel, with a green-yellow body color and a weight gain of 3-4 times; the third is gray, with gray body color and fine spots. This eel grows slowly and only gains weight by 1-2 times. When selecting seeds, you should choose eels with no injuries on the body surface, strong activity, strong physique, relatively uniform specifications, yellow color and large spots, and green-yellow body color as seedlings. When selecting eel species, you must strictly control them. Try to purchase eels that are caught in cages and have not been temporarily raised for a long time. Do not collect drugged eels, hooked eels, eels caught with clamps (if necessary, these fish can be temporarily raised) and eels with red abdomens on both sides. In order to ensure the quality of the purchased eel species, deep water pressure method can be adopted during procurement to eliminate the weak and strong. Method: Fill the thin iron box containing eel seedlings with water (the fish only occupy one-third of the volume), cover it, and observe the activity of the eels in the box after 10-15 minutes. If the eels float on the surface of the water and the heads are out of the water, they should be removed, and the eels that sink to the bottom of the box with strong physique should be retained. When selecting seeds, it is also necessary to pay attention to selecting eels from areas with geographical, natural and climatic conditions close to the breeding grounds as seedlings, so as to better adapt to the local breeding environment and try to avoid the problem of acclimatization of breeding products. Large-scale cage farming of yellow eel requires a large amount of seeds, which generally requires long-distance purchase and transportation. Eel seedlings are mostly transported in bamboo baskets. Bamboo baskets are large and small. Small baskets can hold about 25 kilograms, medium baskets can hold about 50 kilograms, and large baskets can hold about 75 kilograms. In order to ensure transportation safety and improve survival rate, medium and small baskets can be used for transportation. First line the bamboo basket with soft plastic film, put the selected eel seeds into the bamboo baskets respectively, put an appropriate amount of loach in each bamboo basket, and use the habit of loach's continuous activity to avoid the seedlings from entangled with each other. The basket should be filled with pond water at natural temperature, which accounts for one-third of the total volume. A small amount of water plants can also be placed on the top of the bamboo basket to maintain the corresponding humidity. The water for transporting eel seeds cannot be directly deep well water or tap water, and ice cubes cannot be added to the basket to prevent colds caused by excessive temperature differences. For long-distance transportation, 0.1 g of povidone-iodine or S-polyiodine can be used per 100 kg of water in the transport container for immersion transportation. This can prevent colds and other diseases caused by excessive stress. Seedling stocking (1) Stocking time. The stocking time span of eel fry is relatively large, and it can be carried out from the Gregorian calendar to September. If the number of cages is small and the demand for seedlings is not large, and there are seedlings captured in eel cages locally, you can choose continuous sunny weather and start stocking in early April. The seedlings released at this time have a long growth period, a high meat increase multiple, and good benefits. If the demand for seedlings is large, the best time to stock seedlings is from June 25 to July 25, and choose continuous sunny weather for stocking. The water temperature at this time is relatively stable, and the survival rate of seedlings after entering the box is high. The time for long-distance transportation of seedlings can be within 10 hours. The seedlings purchased from the end of July to September are generally not intended for the market or growth and weight gain in the same year due to their short growth period and unstable temperature. They are mainly intended for the market in the second year or for temporary breeding until winter to earn seasonal price differences. At this stage, the appropriate size of seedlings should be selected for stocking based on the local seedling prices at that time. (2) Stocking specifications. Stocking specifications are closely related to the farmer's business guidance and cost-effectiveness. Generally speaking, for farmers who want to reach the commercial eel specifications in the same year, the size of the eel seedlings should be between 25 grams, so that most eels can reach the standard of large eels. Some farmers consider that the purchase price of fiber (specifications below 20 grams) is low, the relative weight gain multiple is high, and the overall benefit is more considerable, so they can only purchase fiber. In reality, the specifications of the eels purchased by farmers vary, ranging from as small as 10 grams to as large as more than 100 grams. They are often packed in bulk in multiple specifications. This requires careful screening after purchase and breeding according to specifications to prevent the predation of the weak by the strong, two-level differentiation, and difficulty in complete domestication after mixed breeding, which affects production and benefits. (3) Change water and bath with medicine. After long-distance transportation, the eels consume a lot of energy. In addition, due to high-density loading, the content of metabolic products in the container increases sharply, and the water quality is very poor. The water should be changed immediately after arriving at the destination. You can first use colored tape, bamboo poles or wooden stakes to make a reservoir, and put the water in the pond into it for standby use. The temperature difference between the water in the reservoir and the water in the eel transport container should be strictly controlled within 2°C. Change the water and wash it off, and then bathe the eel seedlings with medicine. The drugs selected should be low-irritation, high-efficiency, and able to protect and repair the mucus on the surface of the eel, such as povidone-iodine (1 gram/cubic meter) or Liyuan S polyiodine. The bathing time is generally 5-10 minutes. Do not add drugs at will, and the immersion time should be carried out according to the instructions. Avoid using drugs that are highly irritating, damage mucus, and are prohibited (such as potassium permanganate, antibiotics, malachite green, high-concentration salt water, etc.). Grading into boxes, the eel seedlings entering the cages should be strictly separated and raised according to different specifications. Generally, they can be graded into three gradients: less than 25 grams, 25 grams to 50 grams, and more than 50 grams. Each box should be weighed before entering the box, and if conditions permit, the tail number should be counted at the same time and records should be kept. (5) Stocking density. Summarizing the experience of farmers over the years, stocking density has a great influence on the benefits of eel farming (the eel fry released from April to June, with a size between 20 and 40 grams, is more suitable for 0.5-1 kg per square meter; the eel fry released from July to August, the stocking amount can be appropriately increased, 1-1.25 kg per square meter. 3. After the eel fry are tamed and put into the box, the critical period that affects the survival rate is the first half of the month. Only by smoothly passing through this dangerous period can the successful breeding be laid. Therefore, the management of this stage is crucial and must not be taken lightly. 1. Environmental maintenance After the seedlings are placed in the box, due to the sudden change of the habitat and the increase in density, the stress response is strengthened, the secretion of skin mucus slows down, resulting in a decrease in the body's resistance, and the pathogenic microorganisms from the outside are very easy to invade and cause disease. The main task at this time is to maintain the ecological balance of the pond, protect the water quality of the pond, and create a self-repair condition for the eel. Povidone iodine, povidone iodine, polyvinyl pyrrolidone iodine, S high polyiodine, S high polyiodine, and new anti-aging can be used for water maintenance for 7 days. Tianyi Yibacteria Water Saint can also be used for water maintenance. 2. Setting up the feeding table The second day after the eel enters the box, it can be trained. The first step in training is to set up a feeding table. The number of feeding tables is determined by the size of the cage. One is set for every 4-6 square meters of the cage area. The feeding table is set in the dense water grass in the middle area of ​​the cage. It is evenly distributed so that there is enough buoyancy to support the mixing of bait and the eels eating, and at the same time prevent the sinking of food, causing waste and pollution. 3. Feed evaluation and selection Eel is a fish that mainly feeds on animal bait. According to this feeding habit, farmers often choose live fresh baits such as lobsters (Procambarus clarkii), earthworms, fresh fish, and clam meat that eels like to eat as feed during the eel's domestication period. At the same time, with the development of the feed industry, the research on compound feed for eels has become more in-depth. There are more than 70 brands of compound feed for eels entering the Hubei and Hunan markets alone, and the sales volume is increasing day by day. There are many advantages in raising eels with compound feed: 1. Give full play to the nutritional value of feed. Compound feed prepared by a variety of feeds can give full play to the complementary effects of various raw materials, achieve nutritional balance, meet the nutritional needs of eels, and accelerate the growth of eels. 2. Expand the feed source. From the original limited feed source, it has become a variety of varieties and a sufficient total amount. 3) After the feed raw materials are processed, the raw materials are deformed and denatured. Good palatability improves the feeding rate and digestibility of eels. 4) The binder in the compound feed can reduce dissolution and waste in water, thereby improving the economic benefits of the feed, while also reducing water pollution and improving water quality and environmental conditions. 5) It reduces the labor intensity of farmers. Practice has proved that the unit cost of using fresh fish and compound feed to raise eels is much lower than that of simply feeding fresh fish to raise eels, and the benefits are much better. Because there are too many brands of eel compound feeds and the quality is uneven, the quality directly affects the growth, breeding cycle, disease, breeding cost, and water quality of eels. Therefore, it is very important to choose first-class quality eel compound feed. So how to distinguish the quality of compound feed? You can start from the following aspects: A. Distinguish from the physical and chemical properties of the feed a) Distinguish from the uniformity of particles, surface smoothness, floating properties, and color uniformity. If the particles are uneven, it will affect the eel's feeding, waste feed, pollute water quality, and reduce the survival rate. If the surface of the feed is not smooth (such as uneven cutting of feed particles and corners), it will affect the eel's feeding, damage the intestines, and even cause diseases. b) Identify from the degree of expansion. The degree of feed expansion can be judged by the pores on the surface of the pellet feed. If there are many pores on the surface, it means that the feed is over-expanded, and more nutrients are lost in the feed, making the nutrition in the feed unbalanced, affecting growth and prone to disease outbreaks. c) Identify from the taste of the feed. High-quality feeds are all made of high-quality fish meal, which tastes fresh. Fish meal has a fishy smell for feeds that are not fresh or of poor quality. d) Identify from the protein composition and amino acid composition of the feed. The crude protein of the feed is divided into animal protein and plant protein. Animal protein can be digested and absorbed by eels, while plant protein is difficult to digest. Although some feeds are labeled with high crude protein content, the animal protein content may be low. B Identify from the feeding effect a) Feed cost. Feed cost = feed coefficient x price. High price does not necessarily mean high feed