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

The weather in Guangdong is most suitable for raising Australian freshwater lobsters. Shrimp seedlings were stocked in April and harvested in June at 5438+ 10. It takes half a year from shrimp seedlings to market.

Australian freshwater lobster, also known as red crayfish, is native to Australia. It is a new large-scale high-quality freshwater shrimp species successfully introduced and bred in China in recent years, and it is also one of the rare economic shrimp species in the world, and is being popularized at present.

Australian freshwater lobster has the characteristics of strong adaptability, miscellaneous eating habits, fast growth, survival at water temperature of 3℃ ~ 35℃, dry transportation resistance, good meat quality and high economic value. The highest yield per mu in some units in Guangdong can reach 4 1 1 kg, with good economic benefits. According to the experience of Australian culture technology and some trial culture conditions, the specific culture technology and methods of Australian freshwater lobster are introduced as follows for reference.

First of all, shrimp seedlings can be stocked in April. Shrimp fry with a body length of 3 cm ~ 5 cm can be stocked with 5000 ~ 6000 per mu, and the number of small shrimp fry can be increased appropriately. But shrimp bully the weak and fear the big, so the fry stocked in the same pond have neat specifications. When releasing seedlings, it is necessary to avoid excessive water temperature difference, and it is appropriate to pool at dusk or dawn. Before releasing the seedlings, slowly add a small amount of pond water into the seedling container to adjust the water temperature until the water temperature in the container is close to that of the pond water, and then gently put the shrimp seedlings into the pond.

Second, do a good job of feeding According to general experience, the daily feeding amount is subject to eating, eating and leaving no residual bait. Generally, shrimps are fed at 20% ~ 25% of their body weight, with medium shrimp 15% ~ 20% and prawn 5% ~ 10%. Feed it twice a day, once in the morning and once in the evening, 70% ~ 80% of the total daily feed, and feed it in the shallow water area of the pond. Too little bait will inhibit the growth of shrimp, while too much bait will not only increase the cost, but also worsen the environment in the pond, which is unfavorable for the growth and shelling of shrimp. The feed can be general shrimp feed, adult shrimp feed and small miscellaneous fish.

Three. Strengthening feeding management In daily management, besides observing the feeding, activities and growth of shrimps, attention should also be paid to water quality and sediment environment. When the dissolved oxygen content in the water is very low, the water quality deteriorates, or severe weather such as thunderstorm, sultry and continuous cloudy days, feeding should be reduced or stopped. When the weather is too cold or too hot, in order to prevent extreme temperature, the pool water can be deepened appropriately to stabilize the water temperature at the bottom of the pool. We should also pay attention to disease prevention and eliminate natural enemies of seagulls, bass, catfish, mandarin fish and other wild fish.

Fourth, catching shrimps grows fast. It can be harvested and put on the market in the same year, and the capture form can be captured by dry pond or purse seine. If the aquaculture production is high and a large number of products are listed in batches, trawling or casting nets can also be used for fishing and trapping. When catching, the effect is better when it is dark at night.