Freshwater lobster cultivation in Australia
2018-06-19 06:00:16
Australian freshwater lobster, also known as red prawn, is a large species of tropical shrimp. Its wide adaptability, as long as the water temperature is maintained within its suitable temperature range, can be raised all year round. It can be cultured in ponds, lakes, reservoirs and rivers. At present, earthen pond farming is commonly used.
Pond conditions: 3-5 acres of land surface is appropriate, the bottom with sand or hard soil as well. The pool wall may have a suitable slope, the bottom of the pool must have certain aquatic plants, have good water intake and drainage facilities, can discharge irrigation, and a net cover must be installed at the inlet and outlet. Shrimp ponds should be changed frequently, changing the water volume from 1/5 to 1/3 each time to facilitate the shelling and growth of shrimp. Around the pond, bamboo and plastic are used to stop the escape wall with a height of 30 cm. There must be enough concealed objects in the pond, such as old bricks, tiles, mesh, old tires, bamboo rafts and other artificial nests, but also water lilies.
Water quality conditions: Temperature range 9-36 degrees. The optimum temperature is 20-33 degrees; the growth stops below 12 degrees, and feeding stops below 10 degrees. pH 7-8, dissolved oxygen >4mg/L, water quality to prevent industrial pollution and pesticide pollution. The hardness of water is better than 50ppm.
Breeding density: 2 cm long juvenile shrimp stocking 6000-8000 tails per acre, 3 cm long stocking 4000-6000 tails per acre. Polyculture can put 2000-3000 prawns per acre. Apart from that, 50 grams of flowers, 500 to 400 white storks and 200 grass carp are stocked per acre. Avoid polyculture with carnivorous fish.
Feeding Technology: There are fresh small fish, snails, soybeans, shrimp feed, bean cakes, peanut cakes, vegetables, and low-value shellfish. The species should be changed frequently and the number of feedings per day should be 2-3 times for shrimp and 1-2 times for shrimp, and the amount of feeding should be 5%-15% of the body weight of the shrimp. The amount of feed should be based on water temperature, water quality and feeding conditions. Increase or decrease, the amount of feed at night to account for about 70% of the day.
Day-to-day management: In order to find out anomalies, we must deal with the phenomenon in a timely manner while paying attention to the prevention of predators and pesticide poisoning.
Disease prevention and control: Before the seedlings are planted in the pond, surface disinfection can be performed to prevent pathogens (parasites, algae and certain bacteria) from being carried into the pool. At the same time to add a variety of vitamins in the bait of shrimp, enhance shrimp immunity, to manage water quality, pay attention to water disinfection, control of pathogenic outbreaks.
Capture: After freshwater lobsters are stocked for 120-150 days, they are caught in nets or net cages using the method of catching and keeping small. If arrested, stocking densities can be appropriately increased; depending on the local temperature conditions, water-dried ponds can be captured and put on the market in November-December.
Overwintering: When the water temperature is lower than 10-11 degrees, all the shrimp can be caught. Under the climatic conditions in Hainan, the pool water can be deepened and it can be used in winter.
Transportation and Market: The live shrimp is easy to transport, as long as it is filled with some water and grass, it can be transported by maintaining a certain humidity. Pay attention to ventilation when transporting, don't squeeze; transport time is too long, watering is needed halfway to ensure the listing of large live shrimp. , improve the economic benefits of breeding.
Pond conditions: 3-5 acres of land surface is appropriate, the bottom with sand or hard soil as well. The pool wall may have a suitable slope, the bottom of the pool must have certain aquatic plants, have good water intake and drainage facilities, can discharge irrigation, and a net cover must be installed at the inlet and outlet. Shrimp ponds should be changed frequently, changing the water volume from 1/5 to 1/3 each time to facilitate the shelling and growth of shrimp. Around the pond, bamboo and plastic are used to stop the escape wall with a height of 30 cm. There must be enough concealed objects in the pond, such as old bricks, tiles, mesh, old tires, bamboo rafts and other artificial nests, but also water lilies.
Water quality conditions: Temperature range 9-36 degrees. The optimum temperature is 20-33 degrees; the growth stops below 12 degrees, and feeding stops below 10 degrees. pH 7-8, dissolved oxygen >4mg/L, water quality to prevent industrial pollution and pesticide pollution. The hardness of water is better than 50ppm.
Breeding density: 2 cm long juvenile shrimp stocking 6000-8000 tails per acre, 3 cm long stocking 4000-6000 tails per acre. Polyculture can put 2000-3000 prawns per acre. Apart from that, 50 grams of flowers, 500 to 400 white storks and 200 grass carp are stocked per acre. Avoid polyculture with carnivorous fish.
Feeding Technology: There are fresh small fish, snails, soybeans, shrimp feed, bean cakes, peanut cakes, vegetables, and low-value shellfish. The species should be changed frequently and the number of feedings per day should be 2-3 times for shrimp and 1-2 times for shrimp, and the amount of feeding should be 5%-15% of the body weight of the shrimp. The amount of feed should be based on water temperature, water quality and feeding conditions. Increase or decrease, the amount of feed at night to account for about 70% of the day.
Day-to-day management: In order to find out anomalies, we must deal with the phenomenon in a timely manner while paying attention to the prevention of predators and pesticide poisoning.
Disease prevention and control: Before the seedlings are planted in the pond, surface disinfection can be performed to prevent pathogens (parasites, algae and certain bacteria) from being carried into the pool. At the same time to add a variety of vitamins in the bait of shrimp, enhance shrimp immunity, to manage water quality, pay attention to water disinfection, control of pathogenic outbreaks.
Capture: After freshwater lobsters are stocked for 120-150 days, they are caught in nets or net cages using the method of catching and keeping small. If arrested, stocking densities can be appropriately increased; depending on the local temperature conditions, water-dried ponds can be captured and put on the market in November-December.
Overwintering: When the water temperature is lower than 10-11 degrees, all the shrimp can be caught. Under the climatic conditions in Hainan, the pool water can be deepened and it can be used in winter.
Transportation and Market: The live shrimp is easy to transport, as long as it is filled with some water and grass, it can be transported by maintaining a certain humidity. Pay attention to ventilation when transporting, don't squeeze; transport time is too long, watering is needed halfway to ensure the listing of large live shrimp. , improve the economic benefits of breeding.
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