Trout seed breeding and stocking

The cultivation of carp seedlings is a production process in which seedlings are grown to more than 10 grams. This stage requires the cultivation of three different types of ponds, including primary pools, secondary pools, and tertiary pools. The quail species is the basis of adult quail breeding, and the quantity and quality of quail species directly affect the quality of pupa breeding. Therefore, in order to develop eel production, we must first do a good job of eel breeding. In order to ensure the smooth development of seedlings cultivation, in addition to doing all the above preparations, we must also pay attention to the following aspects of production.

Seedling stocking time

As the seedlings can only begin to feed and grow when the water temperature is above 15°C, the open-air ponds will raise the seedlings of the eel, and when the natural water temperature reaches 13°C or above, the stocking is more appropriate. In this way, after the seedlings are adapted to the environment after short-term conservation, they can start domestication when the water temperature rises. Seedling stocking time in Fujian and Guangdong in China is around the beginning of March. For breeding grounds with warming conditions or warm water supply, the stocking time of the seedlings should be as early as possible, so that the breeding period can be extended and the yield and quality of the earthworms can be increased.

Seedling stocking density

Due to the different culture methods, the stocking densities of the seedlings are also different. The general water-stop pool stocking density is from 150 g to 300 g/m2, and the flow pool is from 500 g to 1000 g/m2. Low-density stocking grows faster and has a higher survival rate. Seedlings adapt to the environment

Seedlings are transported over long distances and are in a state of fatigue. In addition, the temperature between the container and the pool water is too large (especially for warming cultivation ponds). Therefore, an adaptation process is required. Specifically, the seedlings are placed in the pool. Edge, gradually pooling seedling box, until the seedling body temperature close to the pool water temperature (generally no difference between 5 °C) before putting it into the cage placed in the pool; if you use nylon bag oxygenation transport, can be Put the nylon bag into seedlings in the pool. When the bag temperature approaches the pool water temperature, remove the bags and put the seedlings into the cage. Seedlings are generally maintained for a period of 0.5 hours to 1 hour (open aerator). After the normal activities, the dead seedlings and dirt are removed, and the scales and counts are placed in each seedling nursery pond.

Counting and weighing of seedlings

In order to control the stocking density of seedlings, they must be counted during stocking, and the weight, size, and mantissa of each primary pond should be calculated. The specific approach is: first gently stir the seedlings in the cage, and then randomly sample 2 to 4 times, weigh 50 grams each time, use a small bowl or spoon to count, and then find the average size. At the end, the number of tails per kilogram of seedlings was calculated and the average size was obtained.

Seedling disinfection

The seedlings are delicate and susceptible to bruising and infections caused by mold and bacterial diseases during harvesting, holding, and transportation. Therefore, disinfection must be performed when stocking. The disinfection method is a medicine bath. One is a medicine bath with a container, and the other is a Quanchiposa medicine bath.

1. Disinfection time: The medicine bath in the container is carried out in front of the seedlings in the lower pool; the whole pool is disinfected and disinfected on the evening of the seedlings in the afternoon.

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