What are the selection methods of crayfish seedlings when raising shrimps in spring? Watch this 3 o'clock!

As the temperature picks up in spring, crayfish breeding has to be prepared one after another, and the selection of seedlings before breeding is also important to fertilize. What are the methods for selecting crayfish seedlings when raising shrimp in spring? Keep an eye on these three points!

I. the selection method of crayfish seedlings

As there are some differences in management methods, breeding methods and water quality in different regions, the quality of seedlings in different areas will be good or bad. On the other hand, there is a phenomenon of multi-generation reproduction of local shrimp seedlings, which will lead to the shortcomings of parental degradation and high incidence of disease heredity of crayfish, so it is suggested that farmers should choose nearby areas with a higher level of breeding technology. at the same time, we should avoid the phenomenon of all local seedlings, which is the same as not putting eggs in the same basket.

II. Specification of the selection method of crayfish seedlings

In the selection and purchase of seedlings, we should pay attention to ensure that the specifications of shrimp seedlings are neat, and the difference can not be too big, otherwise it is easy to feed less in the early stage of breeding, and the large size seedlings will attack the small size seedlings and cause losses, and the loss outweighs the gain. At the same time, we should also try to choose larger seedlings (of course, this will increase the cost), which is significantly helpful for the early listing of breeding and the improvement of anti-stress and disease resistance.

Third, the selection method of crayfish seedlings depends on the body color.

The good or bad degree of seedlings can also be judged by the difference of body color. It is generally believed that high-quality shrimp seedlings are cyan in the early stage, so red shell shrimp should be avoided as far as possible when taking seedlings. Of course, it is inevitable that all green shell shrimp can not be fully guaranteed. At this time, it is necessary to ensure that the larger the proportion of blue shrimp seedlings, the better. In the process of culture, the green-shell crayfish seedlings shed their shells and grow faster than the red-shell crayfish seedlings.

4. the method of selecting crayfish seedlings: intestinal tract, liver and other organs

The organs of the intestines and liver directly determine the subsequent feeding and growth of the crayfish seedlings. If there are problems in the intestines and liver, it will directly lead to the unsatisfactory eating condition of the crayfish, slow down the growth rate, and, in serious cases, cause enteritis and even death of the crayfish. The intestines and liver of high-quality shrimp seedlings are as follows: there are no segments in the intestines, no jejunum and stomach, the overall color should be the color of feed, and the liver should be close to golden yellow.

A good beginning is half the success. Only by meticulous selection of shrimp seedlings can farmers ensure the quality of crayfish and improve economic benefits.