One of the exotic salmon (Australian silver cockroaches) breeding techniques
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The Australian silver cockroach, also known as Ginger, is native to the rivers of Queensland in southeastern Australia and is the most temperate farmed fish in the country. The Australian silver cocoon is mild and does not eat food from each other. It has the advantages of high survival rate, rapid growth, high density breeding, and high feed conversion coefficient. It is an excellent breed for pond culture. In 1996, Fujian Quanzhou Changsheng Fishery Company took the lead in introducing trials. Thousand Island Lake in Zhejiang Province was introduced in 2004 for cage culture. (I) Economic value Australian silver carp is rich in nutrients in the body, and its meat is smooth, plump, fat and not too greasy. The taste of the food is extremely sweet, mellow and rich, and it is memorable; the fish body is rich in fish gelatin and evenly distributed. Fish gelatin is beneficial to the body's anti-aging and immunity enhancement and is the best supplement for post-operative and maternal confinement. Its good flavor, resistant to cryopreservation, meat refreshing, no fine, is a healthy food for all ages; suitable for sashimi, grilled, steamed and so on. The body is plump, rich in collagen, and distributed in an even manner on the marbled road. The fish is white and free from thorns and is delicious and juicy. It is a treasure of fish. (B) Biological characteristics Australian silver carp body slightly spine body type and side flat, the head fine tip, mouth small, tail stalk slender. The color from the side of the body line to the back is darker, often gray-black; below the body line to the abdomen is white gold or yellow; abdomen is white. The lateral line of the body extends significantly to the center of the tail shank. Australian silver omnivorous, feeding on shrimps, insects, plankton, seaweed, etc. in rivers, and has more food resources than carnivorous fish. Is a wide temperature of water fish, cold, heat-resistant; its survival water temperature of 2-38 °C, the optimal growth temperature of 15-30 °C, can be pure water or about 23% of the concentration of salt water rearing. Hi inhabits relatively clear water quality. If the water quality is too fat, it will affect its feeding. Water body transparency 15-40 cm, pH 6.7-8.5 is appropriate. The males are mature at the age of 2 and the females are mature at 3rd age, with up to 150,000 eggs per kilogram of body weight. Australian silver cocoon can tolerate poor water quality, when dissolved oxygen is 2 milligrams per litre, ammonia nitrogen is 0.7 milligrams per litre, and pH 6.0-10.2 can be tolerated. It is the best variety for high-capacity, low-cost intensive culture. (C) Adult fish breeding 1. Stocking density: The depth of water is about 90 cm, and 1 species of aerator is equipped with a fingerling pond. 1.5-2.0 million summer flowers with a body length of 3.5 centimeters per mu are allocated; Centimeter 3000-3500 tail fish species. 2. Before the day-to-day management of stocking, ponds are cleaned with quicklime or bleached clear ponds to completely kill pathogens. Due to the omnivorous nature of the Australian silver foraging, the source of feed is wide and easy to obtain. Generally, it is replaced by artificial feed, and buoyant salmon feed is the most common. Juvenile stage feed requires 42% protein content, adult fish stage is 36-41%; daily feeding rate is 3-5% of fish body weight, feeding 2-3 times a day, feeding should be strictly timed, Positioning, qualitative, quantitative "four definite" principle. (d) Disease Prevention Australian silver carp is more resistant to disease than ordinary fish, but routine preventive work must also be carried out regularly. Spring and summer are the prevalent seasons of parasites, and anchor head lice are more common. They insist on applying every minute to 15 weeks to prevent the occurrence of parasites. The autumn and winter seasons are the epidemic season of bacterial diseases. , insist on applying chlorine dioxide one-half million to three every three to four weeks for prevention. (E) Fishing In the 4-6 weeks before the sale of adult fish, 15 kilograms of quick lime shall be sprayed evenly on the surface of each acre, and once in 5-7 days, the smell of fish in the fish body will be fully removed, and good quality will be maintained. .