CATDOLL : CATDOLL: Is it easy to raise a young giant salamander?

1. Is it easy to raise giant salamander seedlings?

Keep the temperature above 15 degrees in winter and below 30 degrees in summer, and keep good ventilation. The water for maintenance must be clean and pollution-free, preferably flowing water. Feed animal feed, preferably live feed. Remove feed residues in time. It is best to simulate the natural growth environment when raising giant salamanders. It is a national protected animal and cannot be caught and raised in the wild. If you want to raise them in batches, you must first apply for a breeding license. As long as you simulate the natural environment and feed wild feed, it is easy to raise.

Please accept it, thank you!

2. Why can’t my feather-leaf morning glory seedlings survive?

Too much fertilizer will kill it, and the seedlings have weak roots and are not suitable for fertilization!

3. I am also a eel breeder. I have 100 catties of eel seedlings now, but I don’t know how to manage them. I am a beginner breeder.

The growth of eels is relatively slow. A one-year-old fish can grow to 20 cm, a two-year-old fish can grow to 30 cm, and a three-year-old fish can grow to 40 cm. The growth rate of artificially cultivated eels is related to whether there is enough bait. When there is enough bait, they generally grow faster than in nature.

The activity of the eel is closely related to the water temperature, and the suitable water temperature for its growth is 15-30℃. When the water temperature is below 10℃, it stops eating and goes into hibernation; when the water temperature rises to above 15℃, it starts to hunt normally; when the water temperature exceeds 30℃, it burrows into caves to spend the summer.

1. Still water pond breeding method

The characteristics of breeding in still water ponds are small water exchange volume, mud at the bottom of the pond for eels to dig holes or artificial objects for eels to live in.

The location of the breeding pond should be leeward and sunny, with a good water source. The shape can be rectangular or oval, and the size depends on the breeding scale. There are two types of pond structures: cement pond and earth pond. Cement ponds usually have three types: above-ground, underground and semi-underground. The water temperature of above-ground cement ponds varies greatly with the seasons, which is not good for eel breeding. Underground and semi-underground types are more commonly used. The construction of earth ponds should choose a location with hard soil. It is best to lay a layer of tarpaulin on the bottom and wall of the pond, and the edges and corners should be laid tightly, and then lay 20 cm (pool wall) and 10 cm (pool bottom) of soil on the tarpaulin. In this way, it can prevent pool water leakage and prevent eels from digging holes and escaping. Whether it is a cement pond or an earth pond, it must be equipped with good inlet and outlet facilities. The diameter of the inlet and outlet pipes is 4 to 10 cm, and plastic nets or wire meshes are installed at the ports in the pond to prevent escape.

After the eel pond is built, it is necessary to fill it with water to clean it. There are two purposes: one is to see if it leaks; the other is to use water to absorb and remove harmful substances in cement and mortar. The new pond is filled and drained 3 to 5 times, and each time it is soaked for 2 to 3 days, which can basically remove harmful substances. After 10 days, 20 to 30 cm thick fertilizer mud is laid on the bottom of the drained pond. The fertilizer mud is made by mixing grass, manure, and soil and then fermenting. After the fertilizer mud on the bottom of the pond is laid, aquatic plants such as water lilies, water peanuts, and water hyacinths are planted in the pond to cool the eel pond and hide and inhabit for the eels. The water depth of the eel pond should be kept at 10 cm, and should not exceed 20 cm at most.

7 days before the release of eel fry, the fish pond should be cleaned and disinfected, and 0.2 kg of quicklime per square meter of water surface should be evenly sprinkled throughout the pond. After disinfection, fill the entire pond with clean water. When releasing eel fry, the water temperature in the eel fry transport container and the water temperature in the fish pond should not differ too much (3-5℃). The stocking density of eels is determined by factors such as the size of the eel fry, the feeding and management conditions, and the amount of feed sources. Generally, when raising yellow eels in small fish ponds, it is better to release 2-5 kg ​​of eel fry per square meter. If the scale of stocking is large, the number can be reduced accordingly, and if the scale of stocking is small, the number can be increased accordingly. If there is enough feed, more can be released, and if there is insufficient feed, less can be released. Because yellow eels have the habit of eating small ones and killing each other, they should be released in different ponds of large and small scales when releasing. Be sure to select eel fry with strong physique, no injuries or diseases, and neat specifications for release, and avoid mixing large and small eels. The best scale for stocking is that each eel fry weighs about 20 grams. Too small or too large is not good. When raising eels at a high density in a fish pond, it is the same as when transporting them. When stocking eel fry, some loaches should also be properly stocked. When loaches move up and down, they can increase the dissolved oxygen in the water and prevent the eels from entangled with each other.

Different feeds should be fed to eels at different growth stages to ensure their nutritional needs. For seedlings that have just hatched for 4 to 5 days, they are mainly fed with water fleas, cooked egg yolks, soy milk, etc. Among them, live water fleas and live rotifers cultured in water are the best. Therefore, the water quality should be fertilized at this time so that there are sufficient water fleas and rotifers in the fish pond for the eel seedlings to eat. If the stocking density of eel seedlings is large, they can also be cultivated in another pond or water fleas can be fished out from natural waters for the eel seedlings to eat. Later, as the eels grow up, they can be gradually fed with earthworms, snails and clams. At the same time, some plant feeds should be matched, such as wheat bran, rice, fruits, vegetables, etc. Among the feeds, earthworms have the best feeding effect, and every 5 to 6 grams of fresh earthworms can increase 1 gram of eel meat. In addition to collecting earthworms in the wild, earthworms can also be raised and bred in garbage and feces in front of and behind houses to supply the eels. Four fixed points should be adhered to when feeding. When the eel grows in nature, it has the habit of hiding during the day and coming out at night to forage. When it is first raised, it can be fed in the evening every day, and then the feeding time can be gradually advanced. After about 10 days of domestication, it can be fed three times a day at 9 am, 2 pm and 6 pm to ensure that the eel has sufficient food. Each feeding should be flexibly controlled according to the weather, water temperature and the amount of residual bait. Generally, 5% of the total weight of the eel is fed.

2. Eel farming in running water

Compared with conventional earth pond eel farming, running water eel farming has the advantages of less land occupation, higher stocking density, faster growth, higher yield, easier management and easier catching, etc. Especially in places with geothermal water or factory waste water, using warm running water to raise yellow eels has better benefits.

It is best to build a fish pond without soil and water indoors, and build it with cement bricks. The area of ​​the pond is generally 2 to 5 square meters, and the height of the pond wall is about 50 cm. Several ponds can be connected in series. Each pond is equipped with inlet and outlet holes (two upper and lower drain holes), and the openings are blocked with mesh covers. And set up a total water inlet channel and a drainage channel between every two rows of ponds. After the cement pool is built, close the total drain hole, and then fill it with water and soak it for more than 7 days to eliminate the floating dust of the cement. After the water is drained, fill it with clean water. Close the lower drain hole and only open the upper drain hole to keep the pool water at a certain depth and have micro-flowing water. If geothermal water or power plant cooling water is used, the water temperature must be artificially controlled according to the temperature at the time so that the yellow eel can grow well at a suitable temperature. In order to prevent the eel species from being infected with diseases, the eel species should be soaked in a 10 mg/L malachite green solution for 30 minutes before being released, and the eel species should be placed in the cement pool in time after disinfection. 4 to 5 kilograms can be placed per square meter. In order to make the eels accustomed to artificial feeding, they can be domesticated, that is, they are not fed for 2 to 3 days after being released, so that the eels are in an empty stomach state. When the eels are hungry, their feeding rate of artificial feed is higher. The animal and plant feeds should be properly matched in the feed, and artificial compound granular feeds can also be fed. Due to the continuous supply of micro-flowing water, especially warm water with geothermal water and waste water, the eels can grow all year round, and the annual output per hectare can be as high as 150,000 kilograms or more. Although the infrastructure investment in cement pools in this breeding method is relatively large, the economic benefits are very considerable due to the high output. Areas with conditions can adopt it according to local conditions.

3. Eel and earthworm breeding

1. Build a pool

Choose a place with perennial water flow to build a pool. The pool is a cement pool with an area of ​​30, 50, or 80 square meters. The pool wall is 80 to 100 centimeters high. The water inlet and outlet are set at the diagonal position, and all are equipped with anti-escape equipment.

2. Pile up soil

Several soil ridges with a width of 1.5 and a thickness of 25 cm are piled up in the pond. The distance between the ridges is 20 cm, and the distance between the ridges and the pond wall is also 20 cm. The soil piled up must contain loam rich in organic matter, so that earthworms can reproduce and eels can burrow and hide.

3. Cultivate earthworms

After the soil is piled up, the water depth in the pond is maintained at 5 to 10 centimeters. Then, 2.5 to 3 kilograms of Taiping No. 2 earthworm seeds are placed per square meter of soil area, and 4 to 5 centimeters of fermented cow dung is spread on the surface of the ridge to allow the earthworms to reproduce. Every 3 to 4 days, the upper layer of cow dung eaten by the earthworms is scraped off, and 4 to 5 kilograms of new fermented cow dung is spread per square meter. After about 14 days, the earthworms will reproduce in large numbers, and eel seeds can be added.

4. Stocking

The stocking density depends on the size of the eel species. Calculated based on the entire pond area, if there are 30 to 40 eels per kilogram, 4 kilograms per square meter are put; if there are 40 to 50 eels per kilogram, 3 kilograms per square meter are put. In this way, the survival rate is above 90% from April to November, and the size is 6 to 10 eels per kilogram.

5. Management

After the eels are put in, the water depth in the pond is kept at about 10 cm, and the water is kept flowing slightly. After that, a layer of cow dung is scraped off every 3 to 4 days, and then 4 to 5 kg of fermented new cow dung is added per square meter to ensure that the earthworms continue to reproduce and the eels feed on the soil themselves without feeding other feeds.

This breeding method has good water quality and provides excellent live bait - earthworms for eels to eat. Therefore, eels are not prone to disease, grow fast, have high yields, and have good economic benefits. Generally, 14 to 15 kilograms of eels can be produced per square meter.