Is the weather in Guangdong suitable for raising Australian freshwater lobsters? How long does it take for shrimp seedlings to be on the market?

The weather in Guangdong is most suitable for raising Australian freshwater lobsters. The shrimp larvae are stocked in April and harvested in October. It takes half a year from the larvae to the market.

Australian freshwater lobster, also known as red crayfish, is native to Australia. It is a new large-scale high-quality freshwater shrimp species that has been successfully introduced and bred in my country in recent years. It is also one of the world's most valuable economic shrimp species. It is currently being Promote breeding.

Australian freshwater lobster has the characteristics of strong adaptability, mixed feeding habits, fast growth, survival in water temperatures of 3℃ to 35℃, resistance to dry transportation, good meat quality, and high economic value. During trial cultivation in some units in Guangdong, the yield per mu could reach up to 411 kilograms, with good economic benefits. Based on Australia’s breeding technology experience and some trial breeding situations, the specific breeding techniques and methods of Australian freshwater lobsters are comprehensively introduced as follows for reference.

1. Shrimp seedlings can be stocked starting from April. Shrimp seedlings with a body length of 3 cm to 5 cm can be stocked at 5,000 to 6,000 shrimp per acre. If the shrimp seedlings are small, the number can be increased appropriately. However, this shrimp is strong and bully, and the small ones are afraid of the big ones, so the specifications of the seeds stocked in the same pond must be uniform. When planting seedlings, avoid large differences in water temperature. It is better to go into the pool at dusk or dawn. Before releasing the seedlings, slowly add a small amount of pool water into the seedling container to adjust the water temperature until the water temperature in the container is close to the pool water temperature, and then gently place the shrimp seedlings into the pool.

2. Do a good job of feeding. According to general experience, the daily feeding amount shall be based on when the fish is full, finished, and no residual bait is left. Generally, small shrimps are fed at 20% to 25% of their body weight, medium shrimps at 15% to 20%, and large shrimps at 5% to 10% of their body weight. Feed twice a day, once in the morning and once in the evening. Feed 70% to 80% of the whole day's feed in the evening. The feed is fed near the shallow water of the pond. Feeding too little will inhibit the growth of shrimp, but feeding too much will increase costs and worsen the environment in the pond, which is detrimental to the growth and shelling of shrimp. The feed can be general shrimp feed, adult shrimp feed, small miscellaneous fish, etc.

3. Strengthen feeding and management In daily management, in addition to regularly observing the feeding, activities, growth and shelling of pond shrimp, we must also pay attention to the water quality and pond bottom environment. When the dissolved oxygen content in the water is very low, the water quality deteriorates, or there is severe weather such as thunderstorms, sultry heat, continuous cloudy days, etc., feed less or stop feeding. When the weather is too cold or too hot, in order to prevent extreme temperatures from occurring, the pool water can be deepened appropriately to stabilize the bottom water temperature. During breeding, attention should also be paid to disease prevention and elimination of gull predators and wild fish such as perch, catfish, and mandarin fish.

4. Harvesting and catching The shrimp grows quickly and can be harvested and marketed in the same year when it is stocked. The capture method can be caught in dry ponds or seine nets. If the breeding output is high and a large number of products are put on the market in stages and batches, net fishing such as trawling or casting nets and traps and cages can also be used. When collecting, the effect is better when it is dark at night.