Cage fish culture is the first choice for fishermen. In fact, it uses the superior natural conditions of the large water surface and combines the dense and precise measures of small water bodies to achieve high yields. Compared with industrial fish farming, fish farming in cages can omit a series of technical facilities such as aeration, sewage, and filtration. Let's introduce the technology of fish culture in cages. Let's take a look.
1. Variety
Years of production practice have proved that the selection of fish species should follow the principles of faster growth, high economic value, strong adaptability, and strong disease resistance, and focus on the introduction of new species and the development of polyculture of multiple species of fish.
2. Cage structure and setting
The length, width, and height of the miniature cage are one meter each, which can be woven with thick threads. The mesh of the adult fish cage is about 3 cm, and the mesh of the fish species is 1.2 cm. Use 8mm diameter steel bars to weld to form a box frame, or use bamboo to tie it into a box frame, and then fix it in the water with sunken stones.
3. Feeding method
(1) Selection of seedlings: Choose fish with a fat body, strong body, disease-free and injury-free, weighing more than 50 grams, and 500 fish can be stocked in each box. Fish species should be disinfected with 3% saline solution before entering the box. After entering the box, they can be fed with *mycin for 10 days, and then once every 20 days.
(2) Intensive feeding and fine feeding: The feed is appropriately combined with local resources and fed with fine feeding. Main ingredients: cornmeal, alfalfa meal, bran, bean cakes, etc. are glued into small balls before feeding. It can be fed about 2 to 3 times a day, and if it is properly reared, it can gain more than 100 grams of weight per month.
4. Prevent water pollution
It is necessary to move the cages in a timely manner, adjust the water level, create a proper water flow environment, and pay attention to the use of lime milk for disinfection and timely removal of water surface pollution sources.
5. Density
Every cage farmer is thinking of ways to maximize production, but in fact, the breeding density should be based on the natural conditions of the breeding area, such as water flow rate, water exchange volume, bottom quality and other factors, scientific analysis and reasonable Determine the capacity of the sea area.
6. Feeding conditions and advantages
Cage fish culture can be carried out in ponds or in ditch rivers and other places and can be moved at any time, which is very suitable for farming households. Ponds can be used for fish culture in net cages. The investment in fish culture in net cages is low, the effect is quick, and the operation is convenient. It is an economical and convenient aquaculture method.
In pond cage fish culture, the first thing to be done is the setting of the cage, and the other is the purchase and breeding of fry. During the breeding process, attention should be paid to the management of water quality, the water should be changed in time, the cages should be moved, and the water level should be adjusted so that the fish have a freshwater quality environment. Cage fish farming can be carried out not only in ponds but also in ditch rivers and other places, which is very convenient.
The above is an introduction to the technology of fish culture in cages. Generally, fish in cages can be released in 6 months, and it can be cultured for two seasons a year. However, the one-time investment in cage fish culture is relatively large, and the breeding cycle is relatively long. Farmers can choose a suitable breeding method according to their actual situation.