What does the river eel eat? How to "domesticate"
River eel is a carnivorous fish. Generally speaking, river eels feed on clams, shellfish, clams, fish, shrimp and animal carcasses. In artificial feeding, artificial formula feed can be put in, but the protein content must be more than 45%. River eel is a nocturnal animal, mainly foraging for small natural animals. In artificial feeding, the stocking density is high, which can not be satisfied only by natural bait, so it must be supplemented by artificial feed. At the beginning of feeding artificial feed, the river crab is not used to it and does not come to eat, so it must go through the stage of "domestication" to make it accustomed to eating artificial feed and develop the habit of eating regularly and in a fixed position. The method of "domestication" is as follows: in the evening, the meat of clam, fresh fish and so on are placed in the feed basket and sunk to the bottom of the pond to induce the river eel to come to eat. A few days later, when more than half of the river eel is used to eating in a fixed position, the feed composition and feeding time are gradually changed from the original evening to the morning, and the feed basket is gradually moved to the water surface to attract the river eel to the surface to eat. Develop the habit of timing and positioning feeding.
- Prev
What should be paid attention to in the continuous cultivation of shrimp and rice?
At present, it is the prime time to plant shrimp, and farmers should pay attention to the following points when putting in shrimp: first, to do a good job in the basic transformation of rice fields is mainly to open ditches, strengthen dikes, build a good drainage system, and set up anti-escape facilities. Second, to do a good job of ditch disinfection, it is best to sprinkle with quicklime, with a dosage of 100 jin per mu, and plant shrimp a week later. Third, select the individuals who are mature, healthy and with complete appendages and put them at 3:1 according to the ratio of male to female. Planting shrimp per mu
- Next
Mote dwarf elephant grass, a fishery forage grass
Mote dwarf elephant grass is a gramineous forage introduced from the United States a few years ago. The grass is perennial, with a plant height of 0.8 mi 1.4 m, short and many nodes, a large number of leaves per plant and strong tiller regeneration ability. It is more hardy, the aboveground part is withered and yellow in winter, and the underground part survives. Sprouting in spring, the temperature begins to grow at about 12 ℃, and likes to grow in places where the soil layer is deep, fertile and moist. This kind of forage grass has high yield and high nutritional value. under good water and fertilizer conditions, it can produce 15,000-20,000 kg of fresh grass per mu, accounting for 8% of the total grass.
Related
- On the eggshell is a badge full of pride. British Poultry Egg Market and Consumer observation
- British study: 72% of Britons are willing to buy native eggs raised by insects
- Guidelines for friendly egg production revised the increase of space in chicken sheds can not be forced to change feathers and lay eggs.
- Risk of delay in customs clearance Australia suspends lobster exports to China
- Pig semen-the Vector of virus Transmission (4)
- Pig semen-the Vector of virus Transmission (3)
- Five common causes of difficult control of classical swine fever in clinic and their countermeasures
- Foot-and-mouth disease is the most effective way to prevent it!
- PED is the number one killer of piglets and has to be guarded against in autumn and winter.
- What is "yellow fat pig"? Have you ever heard the pig collector talk about "yellow fat pig"?