Electric fishing machine captured eel farming

One, select robust, disease-free and injury-free eel storage. At present, catching eels generally to cage (basket) capture, hook capture is the main. Cage (basket) way to get the eel in addition to the body of the body has scratches can be stored, but the hook way to get the eel because most of the body has internal injuries and should not be stored.

Two, pay attention to control the water temperature. Storage eel water temperature should be controlled at 18 ℃ ~ 28 ℃. Each injection of new water temperature and eel pool water temperature difference should not exceed 3 ℃.

Three, maintain appropriate density. The density of storage eels should be based on the number of eels, individual size and pre-storage time to determine the flexibility, do not be too large.

Four, timely water cooling. Because the eel body surface has a lot of mucus, if the storage density is large, and do not change the water in a timely manner, mucus will accumulate more and more. These mucus in the natural decomposition to consume a lot of dissolved oxygen in the water, and produce heat, so that the water temperature rises significantly, resulting in eel death.

Fifth, feeding the right amount of palatable feed. After the eel is put into the storage pool, if the feed is not palatable, the eel is not ingested for a long time, it is easy to suffer from closed-mouth disease, which will lead to its weakness and wasting, and finally died. If the feed is palatable but feeding too much, and will make the eel overfeeding, suffering from bulging disease and death. Therefore, the storage of eel feed should be both palatable and appropriate amount of feed.

The eel is suitable for the development of rural areas as the yard economy, the rich preferred breeding objects. But in the culture, there are many problems, resulting in many farmers, especially the first keepers were different degrees of loss. The following author briefly talked about the first eel should pay attention to the problem, the first eel farmers should be good "six pass".

One, build the pool off

The eel nature of temperature, wind, fear of light, fear of shock, fear of high temperature, so build the pool at the requirements of the sun, avoiding the north wind, water convenient, in addition to the pool around the planting of evergreens and vines to stay in the space of planting plants. Scientifically built eel pool is the basis of eel farming, generally choose cement, brick structure, built semi-underground, the size of 6 to 20m2 is appropriate, the bottom of the concrete pavement is good, the pool depth of 1 to 1.5m or so. In order to prevent eels from escaping, the corner of the pool is generally built into a circular arc, the pool eaves to the inside out. Set up inlet and outlet and overflow, inlet is generally higher than the water surface 30 ~ 40cm, outlet installed in the mud layer line, in order to be able to discharge all the pool water, overflow is generally located in higher than the mud surface 20cm. Drainage and overflow should be located on the opposite side of the water inlet, and each water outlet should be made with metal mesh to prevent escape devices. After the above work is done, should also take measures to de-alkalize the cement pool, in order to avoid the dissolved oxygen in the water to reduce the rise in acidity and alkalinity, so that the breeding of eels, the method is 1kg per cubic meter of water dissolved in calcium superphosphate fertilizer, or 20g of acidic sodium phosphate, soak for 2 days after rinsing with water, and then you can begin to carry out the next step.

Second, the substrate off

First keepers tend to take the black silt directly to the bottom, which is not desirable, because this is not conducive to the eel to play the habit of burrowing, but also to make the eel morbidity rate increase. The correct practice is in the concrete base should also be divided into three layers. The bottom layer is paved with waste plant stalks, generally choose to have toughness, good air permeability, corrosion resistance of coarse fiber plant waste, and requires the size of the match, the weight ratio can be coarse rod: medium-sized rod: crushed material for 5:3:2. For example, the first pavement of 1 to 2 layers of cornstalks, and then paved about 20cm thick rapeseed rods (or soybean stalks), and above the pavement of the 3-5 layers of crisscrossed cornstalks or sorghum poles and so on, and then finally sprinkled into the A layer of hulls, a layer of quicklime (about 10m2 sprinkled 0.5kg); the middle layer is for eels to live in the hard clay layer, the general thickness of about 30 ~ 40cm; the top layer can be paved with silt, the thickness of 15cm or so, and a thin layer of quicklime sprinkled at the same time, and finally injected with water to disinfect the substrate.

Three, the environment

Because eels like half-water and half-air holes, so the eel pool should have water and land. This problem is usually solved by setting up a mud ridge. The ridge is narrow at the top and wide at the bottom, with a width of 40cm and a height of about 40cm. Between the neighboring ridges of mud for the mud ditch, ditch width and depth are about 30cm, pay attention to pile up the mud ridge should be scraped from the bottom of the soft mud. Then you can plant some aquatic plants on the mud ridge, such as rice, water chestnuts and other cash crops, if there are suitable herbal plants planting better. In addition, in order to block the sun, the pool top vegetation can be based on the size of the eel pool planted 2 to 3 grapes, vine layout to the west side of the dense east slightly sparse as appropriate. You can also plant other vines such as loofah, gourd, etc. to control the light, especially to block the western sun in the summer. In this way, it will create a more suitable and stable small ecological environment for eel life.

Four, seedling off

Currently there are mainly the following sources of seedling: first, direct capture from the field, April to October each year in paddy fields and shallow ditches with eel cages or the use of night lighting methods to capture the eel after the capture of the sick and injured eel pick out and then stocking, this method is especially suitable for first-time keepers to adopt. This method is especially suitable for beginners. From the market to buy to choose a strong body, no disease and injury; body color white, no luster, thin and weak can not be used as eel species. In addition, the eel body color orange-yellow than green-gray growth rate, meat multiplier are higher, especially the yellow spot is preferred to buy. At the same time, we should pay attention to the seedling specifications to be basically the same, preferably 20 to 50 tails per kilogram, specifications are too small, the survival rate is low, the year can not be marketed; specifications are too large, meat multiplier is low, the unit of net production is not high. Put into the eel species before 7 to 10 days, per square meter of pool with lime 0.2kg pond. Stocking density depends on the situation: sufficient water, eel species specifications of small per square meter can be stocked 3 ~ 6kg; water inconvenience, eel species specifications of large per square meter can be stocked 2.5 ~ 5kg, but also can be put into the eel body weight of 10% of the loach mixed.

Five, tame feeding off

From the natural environment to capture the eel species, generally refused to eat artificially fed feed, must go through a period of tame feeding process, otherwise it will lead to the failure of breeding. The method of taming is: the eel is put in 3 to 4 days without feeding, and then in the eel action is normal, in the evening began to lead to food. The feed selection of eels favorite earthworms, mussels, etc., the amount can be 1% of the total weight of the eel body, the next day, according to the eating situation to adjust the amount of bait, and slightly ahead of the baiting time. Due to the eel on the bait selective, so after the success of the attraction of food, must be gradually mixed into the attraction of food feed in the local source of wide, low price, good palatability, high rate of meat increase of other bait, and even artificial feed, it must be noted that the animal raw material is best boiled (except live bait). The baiting place is finally located in the mud ridge at one end of the slightly flattened platform, baiting time in the evening when you can see the eels eating is the best. Generally after a week or so of tame feeding work will be basically completed.

Sixth, water quality

Water quality should be good, to change the water, in general, spring and fall every 3 to 5 days to change the water once, summer 1 to 2 days to change the water once, each time to change the water can only be changed to 1/4 to 1/2, and the temperature of the water should be as far as possible with the pool water temperature is consistent with the temperature difference should not be more than 3 degrees Celsius. The time to change the water is better at noon, preferably when there is sunshine. While changing water, pay attention to cleaning the food table and polluted places. It is better to keep micro-flow water if you have the condition. Good water quality is shown by the eel eating will make "squeak" sound. The water level in the pool should be adjusted according to the water temperature, season and weather conditions, generally should be controlled within the range of 6 to 25cm, the principle is shallow at low temperatures, high temperatures deepen appropriately.

Every year before and after the Spring Festival, the market price of eels is more than two times that of April-September, and the goods are few and far between. Therefore, in the fall large-scale collection of wild eels in the net box for a short period of time, to the Spring Festival before and after the sale, can get a good profit. The project is a good way for farmers to increase their income and get rich with less investment in fixed assets, simple operation and fast turnover of capital. The local practice is described as follows:

1, choose good waters to set the net box. Choose to set the net box of the waters of the best pond, followed by a more stable water level of the lakes, rivers and reservoirs, but no matter which body of water, should be sufficient water, good water quality and pollution-free, good light. Net boxes are made of polyethylene mesh sewn together, each with an area of 10-20 square meters and a depth of 1-1.2 meters. The nets in the waters are fixed with wooden stakes or floated with oil drums and so on. Before eels are stocked, a large amount of water peanuts or oil grass is cultivated in the net box and allowed to fill the whole net box for eels to inhabit.

2, fully grasp the quality of eels in the box. Stocking time is usually completed before September each year when the number of eels is high and the purchase price is low. The purpose of temporary rearing is to maintain the weight, get the seasonal difference in price, do not consider the growth of weight gain. Therefore, the adopted varieties do not need to deliberately pursue, but with conventional eel farming to collect seedlings, must strictly quality control, require the purchase of cage-caught disease-free and injury-free individuals for temporary rearing to ensure the survival rate. It is important to note that high temperatures in the fall can easily lead to eel fever and cause mass deaths. The eels in the eel trappers' homes should be changed more than 2 times a day and placed in a cool place when they are being temporarily reared. Winter temporary feeding should be purchased in the eel catcher's home temporary temporary eel not more than 2 days, the collection of eels should be in the relatively low temperature in the morning, the transportation time should be as short as possible, the transport bucket of water and eel weight half and half. The collected eels should be stocked into the box in time.

3, correct stocking. The collected eels should be divided into at least 3 grades according to the size of the collected eels into different net boxes. Before entering the box with 3%-5% salt water sterilization 5-10 minutes. Stocking density is generally 2.5-5 kilograms per square meter net box, and specifications of large stocking weight, specifications of small stocking weight less.

4, temporary management. ① baiting: eels into the box 3 days after the beginning of feeding with a meat grinder grinded fresh fish meat, feeding once a day in the evening, bait cast in the water plants, each box set up 3-4 bait points, the number of each time eaten to the extent. In the middle and lower reaches of the Yangtze River, basically can stop eating after the end of October (water temperature below 15 ℃). ② Anti-freezing: with the gradual decrease in temperature must be in advance to deepen the depth of the pool water and keep the net box lush water plants, if the water plants have diseases and insects should be timely drug control. ③ anti-disturbance: winter low temperature eel activity is very poor, should be resolutely put an end to turn over the water plants and stir the pool water, otherwise it will make the eel fall into the bottom of the box and the inability to swim back to the water plants, resulting in the death of eels lack of oxygen.

5, grasp the timing of timely sales. In the winter, you should always keep track of the price quotations of the major markets and the inventory of the main rearing areas to predict the trend of market price changes, and grasp the timing of the timely sale, to obtain the best returns.