Calyx freshwater aquaculture technology

Also known as Begonia, it is also a marine precious economic fish, which is affiliated to the genus Acer sinensis, Amaranthidae, and Amaranthus. Its meat is delicate and delicious, and it is well received by consumers. Calyx body shape is longer, slightly flat side, slightly spindle-shaped, sharp-knobs, large mouth, upper and lower jaw with villous teeth group, body pimple scales, body color silver white, behind the grayish. Calyx is a carnivorous fish, but it is very easy to acclimate the cluster to feed artificially-combined pellet feed. The calyx is relatively low-temperature resistant, its optimum temperature range is 3 to 29Â°C, and the most suitable water temperature is 16 to 27Â°C. It can naturally overwinter. Calyx is a broad-salinity fish. After the fish has been desalted, spring stocking specifications of about 10 centimeters are maintained for 5 months. The body weight can reach 400 to 500 grams, and 667 meters 2 can produce about 500 kilograms. The market price is higher than that of squid, and the 667m2 benefit is about 2,000 yuan.
Recently, Hyman Aquaculture Co., Ltd. of the Beijing Fisheries Research Institute has drawn seedlings from Fujian and Shandong to study and solve the seedling desalination treatment technology. It can produce large quantities of calyx seedlings that can grow in freshwater ponds. Farmers and aquaculture producers provide a variety of aquaculture species with promising growth. The following briefly introduces the technical points of aquaculture in freshwater ponds for your reference.
I. Pond Conditions Calyx is a fast-moving fish that devours bait. Adult fish breeding ponds should not be oversized. It is appropriate to use 1 to 5 mu (667 m2) of sand, sandy bottom soil, less silt, and pool bottom. Flat, slightly inclined to the outlet, water depth 1. 5 to 2 meters, the drainage system is perfect, the water source is adequate, fresh, no pollution, and the water quality is good. The ponds were exposed to dry sunlight and 10 to 15 days before stocking. The water was drained for 10 centimeters. Each 667 square meters was made up of 80 to 100 kilograms of quicklime, plus 5 kilograms of bleached powder every other day. The whole pool of water was splashed and disinfected.
Second, the seedlings of the seedlings of the castanopsis species are desalted and grown to a length of about 10 centimeters. Adults are put into ponds for adult fish breeding. The survival rate is high, and the stocking specifications strive to be neat, so as to avoid mutual food, and the stocking density of flower buds is every 667. It is appropriate to use 21000 to 1500 m of rice, and 40 large-tailed carp species, 20 carp species, and 200 Pengze species at the same time to fully utilize water, regulate water quality, and increase production.
Third, the bait feeds the calyx as a carnivorous omnivorous fish. It is predatory and can be fed with fish gills, or chilled fish and wild fish. After domestication, they can be fed with pellet feed. Before pouring, a few splashes of water are poured to form the reflexes of the feeding of the calyx. The pellets are then fed into the pellet feed. After a few times of conditioning, as long as the sound of splashing water is heard, the group will swim. And to feed. Set a fixed feeding point, select the location of the center, use a bamboo, wood diving board into the pool water surface, 6 to 7 meters away from the pool shore, set up a feeding point, such a feed bait feed area is large, the fish feeding is not easy Mix water and allow more fish to feed evenly. When the daily feeding amount is small, the fish can be fed at 8% to 15% of the body weight of the fish, 3 to 5 times a day, and grows with the fish in the later period, and can be fed at 3% to 5% of the fish's body weight. 2 shots, the amount of feeding should be adjusted according to the fish feeding conditions and growth conditions. According to the habit of flower buds that do not like strong light, they eat well at sunrise and sunset, and they rarely eat at noon. Therefore, attention should be paid to feed two times in the morning and evening. The principle of â€œslow, fast, slowâ€ should be mastered when investing. Casting, attracting fish and then quick investment, and promptly expand the feeding area, so that the fish evenly fed, wait for the fish to eat quickly, grab the food is not intense and then cast less, until the majority of fish feed until the bait point In general, each feeding time is about 30 minutes to prevent the bait from sinking to the bottom, wasting the food, and damaging the water quality. When the flower buds enter the late autumn or winter, they will reduce the food intake as the water temperature decreases. At about 10Â°C, only It will be eaten at noon on the day of the eye, at this time should be added water insulation over the winter.
Fourth, the water quality regulation Huadu is a benthic fish, like cleaning, high dissolved oxygen (4 ~ 6 mg / l). Transparency lives in a 30-40 cm body of water. In adult fish breeding, new water should be filled in a flexible and timely manner according to water color and transparency. In the early stage, due to the small fish, low temperature, and easy control of water quality, the period of adding water and changing water can be longer. With the growth of fish and the increase of fish pond biomass, it is necessary to do a pondwalk, inject new water frequently, and reasonably use an aerator. Increase oxygen. From September to October, the temperature is suitable, it is the stage of fast fattening of flower buds, and attention to water quality regulation cannot be ignored.
5. The fishing calyx is easy to catch. The calyx cultured in the pond can catch more than 90% of the adult fish after 1-2 times of pulling. However, there are two points to note: First, one day before the net fishing, the feeding should be stopped. Because the satiety of the fish stomach is large, it can easily cause injuries after being collided with other fish. Second, it is ferocious, and it is frightened when pulling the net. It is also prone to bruising and mutual stab wounds. Therefore, try to select the net when pulling the net. Smaller net fishing, taking fish by the amount, trying not to pull the net in the whole pool, implementing segmented pulling nets, and keeping the nets from leaving water when the net is set up, subdividing the fish in the net without leaving the water, so that it can be sold unsold Commercial fish or fish that has been examined have less damage. A pond that has been pulled through the net should be sterilized once for the prevention of water mold disease.

Posted on June 07, 2018