In order to obtain high yields and high yields, the main breeding of catfish in ponds is the key to breeding techniques. In the breeding process should pay attention to the following aspects.
1, distinguish the pros and cons of fish. When farmers purchase squid species, they should distinguish inferior products according to the biological characteristics of the species and purchase quality fish for stocking. This is the basis for the high yield of squid.
2, fish stocking density. In order to reduce the cost of farming, it is best to cultivate large-scale fish species on their own. 1 to cultivate carp fingerlings, stocking carp 0.8-1 million per acre, to develop specifications 50 to 60 grams. 2 adult fish breeding, fish species average size of 50 to 60 grams, per acre stocking larvae 1500 to 1800 fish species is appropriate, commercial fish size 350 to 400 grams.
3, with varieties. To cultivate large-size squid species, do not use grass carp and catfish. Instead, choose squid and squid. The quantity should account for about 20% of the main squid, and squid account for about 10% of squid. It is not too early to match the species' stocking time, especially if the fish is used too early to influence the domestication of the trout.
4. Domestication of fingerlings. Squid is a fish living in the lower and middle layers of the water body. It mainly raises the fish ponds of the carp. After the domestication of the fish species, it is easy to go up and eat, reduce feed costs, and improve the efficiency of fish farming. It is relatively easy to cultivate domesticated fish species. The domesticated fish species have a short time for catching and eating during adult culture and are easy to manage. Adding appropriate additives in the feed during domestication can shorten the acclimation time and increase the feeding area and quantity of squid. The number of groups is large and it is easy to acclimate, whereas domestication takes a long time. When the density has been determined to be constant, the water level of the pond can be reduced. If the density is relatively increased, it will not only facilitate domestication, but also increase the pond water temperature and facilitate the growth of the fry. The water in the domestication period should be "lean" and not suitable for "turbidity."
5, feed particle size. When the size of general squid is less than 10 grams, the particle size of the feed is 0.5 millimeter; 1.0 to 10 milligrams for 10 to 30 grams; 1.5 millimeters for 30 to 75 grams; 2.0 millimeters for 75 to 100 grams; and 2.4 for 150 to 300 grams Millimeter; 300 milligrams or more when selected 3.2 millimeters. The feeding capacity of fish is affected by the fish's specifications and water temperature, so the amount of feeding should be adjusted randomly according to the actual situation.