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The optimal water temperature for California salmon is 20°C to 30°C and the survival temperature is 1°C to 36°C. Hi clear water quality, especially in the fresh water that flows slowly. Normal growth requires a pH of 6 to 8.5, and a dissolved oxygen of more than 3 mg per liter of water.
California squid feeding is a strong carnivorous omnivorous fish, predatory. In nature, it feeds on aquatic insects, shrimps, small fish, and oysters. In artificial breeding, zooplankton, chironomid larvae, leeches, shrimp, fish fingerlings, fish pulp or fish pieces of fresh fish can be fed. In the absence of feed, they can eat each other.
California salmon is delicate and has a beautiful appearance. It is called “freshwater grouper†and is very popular among consumers. The cage culture of California salmon is simple and easy to operate. Now it is introduced as follows:
Select water area. Select a water depth of more than 3 meters, fresh water, no pollution, high transparency, there are micro-flowing water is not close to the main channel of large water cages set up cages.
Net cage structure and settings. The use of floating conventional cages, specifications for 7 meters 4 meters 2 meters or 5 meters 4 meters 2 meters and so on. In general, when the species of fish is 5-6 cm, the mesh is 5 mm; the species of 9 cm or 50 g is used with a 1 cm mesh net cage; the species of 50-150 g is a species with a mesh size of 2.5 cm; 150 More than grams of fish species, the mesh is 3 to 4 cm. When a single cage is set, it is fixed with anchor stones or iron anchors; when multiple cages are set up, polyethylene ropes or iron wires are used in series to form rows, and then the anchors are reinforced at the ends with anchors on the shore. The box spacing is about 5 meters and the column spacing is 15 meters or more.
Fish stocking. Fish species are required to be of uniform specifications, free from illness, injury, and robustness. The specifications of fish species in the same cage are basically the same. For example, if the species of fish that were bred in the same year is released, the time is usually from April to June. If large-sized species of fish are to be stocked, the time of winter fish in the next year can be appropriately advanced. Cage farming California salmon is grading. 5 to 6 cm species of fish, stocking density of 500 per square meter; 50 grams of fish species, stocking density of 300 per square meter; 50 to 150 grams of fingerlings, standing density of 200 to 250 per square meter Tail; more than 150 grams of fish species, stocking rate of 120 per square meter; when the fish body length of 100 grams or less, every two months to one month in a boxing; when the fish is large, the time interval can be extended.
Feed the bait. After stocking, live bait fish or chilled small fish fillets can be fed. The daily feeding rate was 10% to 15% of California salmon, twice daily. When the specifications are relatively small, such as 5 to 6 centimeters, it is best to domesticate and feed compound feed. The daily feed rate is 4% to 6%. The daily choice of food equivalent, such as carp The species, small trash fish, strip fish, snail meat, fish gills, etc. are fed, and after they are adapted to ingest the bait, the compound feed can be gradually fed. The types of bait that are suitable for California salmon are live bait fish, chilled fish, and artificial diets. The protein content of artificial compound feed is required to be over 40%. Therefore, at present, California artificial eggs are commonly used in artificial compound feeds such as cod feed and stir-frying with small trash fish into appropriate amounts of corn flour and peanut cake.
Prevent disease. Fish species should be soaked with 2% to 3% of salt water for 3 to 5 minutes before entering the box. In the epidemic season of fish diseases, they should be bagged with bleach or regularly used at 3 parts per million of bleaching powder or about 0.8 parts per million. The strong chlorine fine box spilled;
Daily management. Always check if the net clothes are damaged, especially before and after strong winds, find problems and deal with them in a timely manner; regularly wash the nets to remove the residual baits, ensure that the nets inside and outside the environment are clean and the normal exchange of water; do a good job in theft, anti-theft and other work.
Culture of California salmon by cages
Californian catfish is a kind of freshwater warm-water fish, originating in freshwater waters of North America. It was introduced into China in the early 1980s and has been promoted in China.