It is a kind of freshwater economic shrimp, which is widely welcomed by people because of its delicious meat. Because of its omnivorousness, fast growth and strong adaptability, it has formed an absolute competitive advantage in the local ecological environment. Their foraging range includes aquatic plants, algae, aquatic insects and animal carcasses. When food is scarce, they also kill each other. In recent years, crayfish has become an important economic species in China. In the process of commercial farming, it is necessary to prevent escape, especially to enter untouched original ecological water bodies. It has caused devastating damage to the ecological competitive advantage of local species.
The species is widely distributed, from northern Mexico to Escambia County, Florida, and from northern to southern Illinois and Ohio. It is widely introduced in the United States and other places, and also introduced in Europe, Africa, East Asia, South America and Central America.
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Crayfish has wide adaptability and suitable growth temperature, and can grow and develop normally at water temperature 10-30℃. It can also resist high temperature and cold, can tolerate high temperature above 40℃, and can safely overwinter below-14℃. Crayfish grow rapidly. After more than two months of cultivation, it can reach sexual maturity and meet the specifications of commercial shrimp. Generally, male shrimp grows faster than female shrimp, and the size of commercial shrimp is also larger than that of female shrimp.
Like many crustaceans, crayfish grow with molting. When molting, they usually look for hidden objects, such as aquatic plants or under plant leaves. The maximum weight gain after molting can reach 95%. Generally, sexual maturity can be achieved by molting 1 1 time, and sexually mature individuals can continue to molt. Its life is not long, about 1 year. However, in the case of lack of food, low temperature and drought, the life span can reach 2-3 years at most.