How to make Australian lobster productive
2018-06-14 19:00:36
Australian lobster is a rare freshwater economic species introduced and developed in recent years. It has six characteristics:
First, the body is big and plump, usually weighing 100 to 200 grams, and the largest individual is 500 grams.
The second is fast growth and high yield. The shrimp is stocked from April to May each year and harvested from October to November. The output of fresh shrimp per mu is about 300 kg, and the maximum is more than 400 kg.
The third is rich in nutrition, delicate meat, crisp, delicious and sweet, unique flavor.
The fourth is strong adaptability, able to tolerate bad weather conditions, and normal life at water temperature between 5°C and 35°C.
The fifth is food miscellaneous, eating both animal feed, artificial feed and humus, and crude and easy to raise.
Sixth, high economic returns. Australian lobster not only has high yield, but also has strong vitality and is convenient for long-distance transportation. Fresh prawns are popular among consumers at home and abroad.
We have experimented in Yangzhou since 1995. We have now initially identified the supporting technologies for Australian lobster breeding in this region.
First, the appropriate growth rate. The natural distribution of Australian lobsters is subtropical and tropical. Better growth rates can be achieved between 18°C ​​and 32°C. In Yangzhou, the water temperature between May and November of each year is higher than 18°C ​​for six and a half months. When the water temperature reaches above 16°C, normal growth can begin. In order to make full use of local thermal energy resources, the release time of Australian lobsters in Yangzhou area should be arranged in early May. The arrest time is late November.
Second, the water quality requirements. 1 Water sources mainly use uncontaminated surface waters such as rivers, rivers, lakes, and reservoirs as the source of water. Groundwater can also be used. Groundwater has the following advantages: It has a fixed independent water source; Wild fish without pathogens. no pollution. The temperature is relatively stable throughout the year. 2 PH value of water, in the breeding process, there has been a minimum of 6.10, the highest value of 9.33 can survive, but 6.5 to 9.0 is better, preferably neutral partial alkali. 3 dissolved oxygen in water, Australian lobster, although resistant to hypoxia, dissolved oxygen below 1 mg / liter, can survive for a short time, but if a long period of low dissolved oxygen, it will affect the growth and survival rate. Therefore, if necessary, an aerator or other oxygen-increasing equipment should be provided in the pond to keep dissolved oxygen above 4 mg/l, avoiding heavy metals, insecticides, herbicides, oil, chlorine, methane, argon sulfide, and high-speed iron. Content and other pollution. 5 The use of micro-flowing water or aquaculture at regular intervals can promote lobster growth.
Third, the pond conditions. 1 The pond should be rectangular, but the area is not limited, but 2 to 5 acres is preferred, and the depth of water is 0.9 to 1.5 meters. The direction of the long axis of the pond should be the same as the summer wind direction. 2 The bottom of the pool is hard soil, and there is no sludge. The slope of the pool wall must be greater than 3:1. 3 The pond should have a good drainage and irrigation system. The upper part of the pond should be filled with water, and the other end of the pool should be drained. The water inlet and outlet must be protected against enemy enemies and escape from the net. 4 The bottom of the pond should have a submerged plant area of ​​about 1/5 of the bottom area, and there are enough artificial concealed objects, such as waste tires, mesh sheets, PVC pipes, waste tile cylinders, bamboo rafts and so on. 6 Conditional ponds can be equipped with aerators.
Fourth, stocking technology and daily management. 1 Density: Two hundred and six prawns of 2 to 3 cm per acre are put in, and 100 white pelicans, 50 tussocks, and 50 grass carp can be properly mixed. 2 Microfluid culture or refill 2 to 3 times a week with fresh water. 3 The feeding should be fixed, timed, fixed, and quantitative. Feeding species should be diversified as much as possible: such as water hyacinths, water lettuces, floating celery and other aquatic plants, cow dung, pig dung and artificial pellet feed. Can also be fed with snails, cockroaches, river clams and other animal dips. Feeding once-a-week cow dung, 100 kilograms per acre, is placed in the four corners of the pond, and is submerged in water. The pellet feed is fed once a day, and the amount of 20% of the shrimp weight can be used at 6 o'clock in the evening. 4 During the summer high temperature period, attention should be paid to increasing the amount of water flow or water injection, and the number of water injections. At night, aerators may be used to increase oxygen.
First, the body is big and plump, usually weighing 100 to 200 grams, and the largest individual is 500 grams.
The second is fast growth and high yield. The shrimp is stocked from April to May each year and harvested from October to November. The output of fresh shrimp per mu is about 300 kg, and the maximum is more than 400 kg.
The third is rich in nutrition, delicate meat, crisp, delicious and sweet, unique flavor.
The fourth is strong adaptability, able to tolerate bad weather conditions, and normal life at water temperature between 5°C and 35°C.
The fifth is food miscellaneous, eating both animal feed, artificial feed and humus, and crude and easy to raise.
Sixth, high economic returns. Australian lobster not only has high yield, but also has strong vitality and is convenient for long-distance transportation. Fresh prawns are popular among consumers at home and abroad.
We have experimented in Yangzhou since 1995. We have now initially identified the supporting technologies for Australian lobster breeding in this region.
First, the appropriate growth rate. The natural distribution of Australian lobsters is subtropical and tropical. Better growth rates can be achieved between 18°C ​​and 32°C. In Yangzhou, the water temperature between May and November of each year is higher than 18°C ​​for six and a half months. When the water temperature reaches above 16°C, normal growth can begin. In order to make full use of local thermal energy resources, the release time of Australian lobsters in Yangzhou area should be arranged in early May. The arrest time is late November.
Second, the water quality requirements. 1 Water sources mainly use uncontaminated surface waters such as rivers, rivers, lakes, and reservoirs as the source of water. Groundwater can also be used. Groundwater has the following advantages: It has a fixed independent water source; Wild fish without pathogens. no pollution. The temperature is relatively stable throughout the year. 2 PH value of water, in the breeding process, there has been a minimum of 6.10, the highest value of 9.33 can survive, but 6.5 to 9.0 is better, preferably neutral partial alkali. 3 dissolved oxygen in water, Australian lobster, although resistant to hypoxia, dissolved oxygen below 1 mg / liter, can survive for a short time, but if a long period of low dissolved oxygen, it will affect the growth and survival rate. Therefore, if necessary, an aerator or other oxygen-increasing equipment should be provided in the pond to keep dissolved oxygen above 4 mg/l, avoiding heavy metals, insecticides, herbicides, oil, chlorine, methane, argon sulfide, and high-speed iron. Content and other pollution. 5 The use of micro-flowing water or aquaculture at regular intervals can promote lobster growth.
Third, the pond conditions. 1 The pond should be rectangular, but the area is not limited, but 2 to 5 acres is preferred, and the depth of water is 0.9 to 1.5 meters. The direction of the long axis of the pond should be the same as the summer wind direction. 2 The bottom of the pool is hard soil, and there is no sludge. The slope of the pool wall must be greater than 3:1. 3 The pond should have a good drainage and irrigation system. The upper part of the pond should be filled with water, and the other end of the pool should be drained. The water inlet and outlet must be protected against enemy enemies and escape from the net. 4 The bottom of the pond should have a submerged plant area of ​​about 1/5 of the bottom area, and there are enough artificial concealed objects, such as waste tires, mesh sheets, PVC pipes, waste tile cylinders, bamboo rafts and so on. 6 Conditional ponds can be equipped with aerators.
Fourth, stocking technology and daily management. 1 Density: Two hundred and six prawns of 2 to 3 cm per acre are put in, and 100 white pelicans, 50 tussocks, and 50 grass carp can be properly mixed. 2 Microfluid culture or refill 2 to 3 times a week with fresh water. 3 The feeding should be fixed, timed, fixed, and quantitative. Feeding species should be diversified as much as possible: such as water hyacinths, water lettuces, floating celery and other aquatic plants, cow dung, pig dung and artificial pellet feed. Can also be fed with snails, cockroaches, river clams and other animal dips. Feeding once-a-week cow dung, 100 kilograms per acre, is placed in the four corners of the pond, and is submerged in water. The pellet feed is fed once a day, and the amount of 20% of the shrimp weight can be used at 6 o'clock in the evening. 4 During the summer high temperature period, attention should be paid to increasing the amount of water flow or water injection, and the number of water injections. At night, aerators may be used to increase oxygen.
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