The key point is also basic, that is, the bottom quality of the pond is good, the water quality is moderate, the water quality is good, the water temperature is balanced, the common equipment is available, and the fish feed should be balanced in nutrition.
Mandarin fish mainly eat some fish and shrimp, so it is necessary to provide bait fish to feed them.
What conditions do you need to raise mandarin fish?
1, the bottom of the pond is better.
Ponds for raising osmanthus fish require good sediment, and ponds with good sediment have better water quality, so the general culture is relatively smooth.
It is required that the bottom silt of the pond should be about 10 cm, and the silt should not be too deep. In addition, sandy loam is better and has strong water purification ability, which is suitable for low-yield fish ponds, such as below 3000 kg/mu, and loam has strong adsorption, which is suitable for high-yield fish ponds, such as above 4000 kg/mu.
2. The water quality of the pond is kept at a moderate degree of fatness.
The water quality of ponds for raising osmanthus fish is medium.
The growth rate of lean water quality is slow and diseases are frequent.
Overfertilized water is rich in organic matter and oxygen consumption factors, and the water quality is easy to deteriorate.
The water with medium fertility has high plankton content, high oxygen production by photosynthesis and rich dissolved oxygen; When there are many microorganisms, the beneficial population often dominates, which inhibits the reproduction of diseased microorganisms, so there are few diseases.
3, with irrigation and drainage, fan, oxygen equipment.
Osmanthus fragrans is a benthic fish with high oxygen consumption rate and weak hypoxia tolerance, so the pond for raising Osmanthus fragrans should be equipped with drainage and aeration equipment.
Roots blower can't be turned on during the day in high temperature period, but should be turned on more in low temperature, rainy days and nights; The impeller aerator can't be turned on during the day when the water is turbid in the pond with high temperature and sunny days. At this time, if the aerator is not turned on, the dissolved oxygen at the bottom of the pond will be higher and the self-purification ability of the water body will be enhanced. However, when the water is green or rainy, it must bloom more. In some areas, when the water quality of cultured osmanthus fish is green, it is insufficient to increase oxygen in rainy days. Osmanthus fish is in a long-term sub-anoxic state, and there will be more breeding diseases, which is typical in Jiangsu during the rainy season from July to August. The waterwheel is not very effective for muddy water and water depth.
4. Feed nutrition should be balanced.
In order to make osmanthus fish eat balanced nutrition, we should feed a variety of feed fish.
Before feeding the feed fish, it is necessary to disinfect and kill the feed fish by drug immersion bath to prevent the pathogen from being brought in by the feed fish and cut off the transmission route of the pathogen.
More attention should be paid to the change of water quality and more targeted preventive measures should be taken during the culture of osmanthus fish.
5. Good water quality and balanced temperature.
Guiyu pond requires a good water balance temperature, and the water quality should be adjusted appropriately.
The high temperature season from June to September is the time when the amount of foraging increases. It is necessary to inject and drain water once a week, and the water exchange amount is about 0.5 meters each time, so as to keep the transparency of the pool water above 40 centimeters.
What food does mandarin fish eat?
1, Osmanthus fragrans is a typical fierce carnivorous fish, which has a strong ability to distinguish the bait. It mainly feeds on live fish and shrimp all its life, even the newly-opened fry should eat the seedlings of other fish.
When I grow up, I eat not only live fish, but also shrimps and tadpoles.
2. Under the condition of artificial culture, the fish that are going to die but can still move, and the dynamic fish or fish-shaped compound feed under the action of water flow can also induce their feeding reaction. Under the condition of food shortage, they can also eat a small amount after artificial domestication.
For bait fish that have died for a long time, no matter they are young, fingerling or adult, they don't eat, even if they are ingested, they will spit it out immediately.
3. Its feeding mode is to actively chase food fish in the fry stage, biting the tail first and then swallowing it slowly; To the stage of large fish species and adult fish, it is an ambush attack.
Often hidden in the water, when you find delicious food, keep your eyes on it, and adjust your position and posture at any time. When the prey approaches, you will suddenly attack, bite it, and then swallow it. As long as the body height of the food fish is less than the height of the mouth crack of the mandarin fish, it can generally be swallowed.
Guiyu feed
(1) Early bait fish: fry (fish flower)1000-2,000,000 fish, such as silver carp, bighead carp, mud carp, Thai mud carp and crucian carp, are pre-stocked per mu in the pond where osmanthus fish is to be stocked, as osmanthus fish.
Feed roughage such as peanut bran and wheat bran, and cultivate for 15-20 days. When the bait fish grows to 1.5-2.5 cm in length, use 0.7ppm copper sulfate and 0.5ppm strong chlorine essence to kill insects and disinfect, and then put them into 2-3 cm for cultivation.
(2) Medium-term bait fish: 200,000-300,000 fish fry, such as mud carp, wheat carp, Thai mud carp, etc., are mixed in the four major fish ponds per mu, and silver carp, bighead carp, crucian carp and other fish fry can also be cultivated in special ponds as bait fish for large-scale osmanthus fish.
(3) Later bait fish: In addition to self-production, it can also be purchased.
In the late stage of culture, it generally enters winter, and the bait fish of shad are easy to freeze to death. We should cultivate enough bait fish of cold varieties such as silver carp, bighead carp and crucian carp to overwinter and use them as backup bait fish of osmanthus fish in winter and spring.