1. Introduction of red crucian carp
Red crucian carp, also known as golden crucian carp or grass goldfish, is similar in appearance to Japanese koi. It is a red and yellow crucian carp raised in captivity. It is the oldest species of goldfish formed by mutation. Its colors are red, red and white and so on. Because of the simple feeding conditions, low cost of feeding, omnivorous and fast growth, red crucian carp can be used for self-training of breeding techniques for beginners, so it is a very popular species. It is mainly distributed in Asia and has strong survivability.
2. Morphological characteristics
The red crucian carp has a spindle-shaped body, undivided caudal fins, and normal dorsal, ventral, thoracic and anal fins . The physique is strong, the adaptability is strong, the diet is wide, and it is easy to raise. In addition to red body color, there are red and white flowers, five flowers and so on. It is suitable for large-scale rearing in parks and natural waters, and can also be reared in courtyard tanks and aquariums.
3. Living habits
1. Breeding
The red crucian carp is the same as the golden crucian carp. The red crucian carp breeds from March to August, always after rain
spawning in overgrown lakes. The growth rate of red crucian carp is slightly slower. The weight of the first year is about 50 grams, the weight of the second year is about 100 to 200 grams, and the weight of the third year is about 250 to 300 grams.
2. Feeding management
(1) Change the water
Change the water frequently, It can increase oxygen, but tap water cannot be used for water changes, because tap water contains chlorine, red crucian carp will die within a few hours when it encounters chlorine. You can use mountain spring water, lake water, and creek water.
(2) Feeding
Daphnia: also known as fish worms or red worms, with brown, reddish brown, green, etc., living in places with many aquatic plants, but it is best to use disposable Feeding is the main thing.
Water earthworm: commonly known as red nematode, water earthworm looks like the larvae of earthworm, because water earthworm lives in the mud, so when feeding water earthworm to red crucian carp, it has to be rinsed repeatedly. Otherwise, the red crucian carp will get sick.
(3) Light
Because sunlight can sterilize, it is best to put red crucian carp in the sun for one or two hours. play a role in disease prevention. And the colors will be brighter and more beautiful.
(4) Distribution range
The red crucian carp lives in Asia and usually lives in ponds and has strong adaptability, even if it is turbid water can be seen. In order to better obtain food, crucian carp chooses to move and forage in shallower waters, especially aquatic plants, which are also the concentration of crucian carp. Mainly feed on algae, larvae and small fish and shrimp.
(5) Pond culture technology
Red crucian carp is a species of crucian carp that has been artificially selected and has a broad market prospect. Below we will introduce the pond-maintaining red crucian carp technology to you:
(6) Pond conditions
The pond where red crucian carp is cultivated is located at the mouth of the pond. The area is generally 5-8 mu, the pool depth is 2.8-3.0 meters, the slope of the pool wall is 1:2.5-3.0, and the effective water storage depth is 2-2.5 meters. High-yield intensive ponds need to be equipped with oxygen-enhancing machinery with a power of 1.5 kW/3-5 mu.
(7) Stocking of fingerlings
Before stocking of fingerlings, the selected ponds should be cleaned with drugs to kill pathogens and enemies. pests. In order to improve the survival rate of aquaculture and the specifications for the market, winter release of fingerlings should be promoted. The stocking density is generally 1000-1500 fish per acre with 30-50 fish per kilogram, and 250-300 fish per mu with silver carp and bighead carp (4:1) spring flakes. When the fingerlings are stocked, mix and bath with 3 percent salt water and 10??10-6 potassium permanganate solution for 10-15 minutes.
(8) Feeding of bait
For ponds that mainly raise red crucian carp, the protein content of the bait should be above 30 percent, and the daily feeding Feed rate: 1-1.5 percent in April-May, 2.5-6 percent in June-August, 2-1.5 percent in September-October, among which, some green feed can be fed moderately in June-August. The bait should be fed at a fixed point, and each pond can have 3-5 food tables. Feed 1-2 times a day. The specific feeding amount should be flexibly controlled according to the weather and the actual feeding situation of the fish. Generally, it is advisable to have a little surplus before the second feeding.
(9) Water pipe disease prevention
During the production season, regular addition and replacement of new water is very necessary for the growth of red crucian carp. Generally in summer, add new water every 10-15 days. The amount of new water is 20-50 cm each time. When changing the water, first drain and then enter, that is, drain the water from the bottom of the pond first, and then add water to the surface of the pond. At the same time, insist on normal startup at noon on a sunny day for 1-2 hours. For water quality management, in addition to the medicated bath before the good fish are put into the pond, during the breeding period, the whole pond is sprinkled with strong chloroquine once every 10-15 days; the concentration of the drug is 0.2??10-6-0.3??10-6. In the high temperature season, add internal medicines such as Kebaoling to the feed. The dose is 100 grams per 1,000 kg of fish per day, 1-2 times a month, and each time is used for 3-5 days, which can effectively prevent enteritis, hemorrhagic diseases, etc. Outbreak disease.