CATDOLL : CATDOLL: Aquaculture Notes

1. Precautions for aquaculture

Precautions in aquaculture include preventing starvation, lack of fertilizer, excessive water temperature, lack of oxygen, and floating heads.

1. Prevent hunger

Fish eat a lot during the peak growth season, so they should be fed more bait. For ponds mainly used for raising grass carp, tilapia, etc., mixed baits such as bran, cake meal, and bean dregs, as well as fresh baits such as young grass, plant stems and leaves, should be fed. Under normal circumstances, the daily amount of coarse feed should account for 10% of the total weight of the fish in the pond.

2. Prevent fertilizer deficiency

The amount of fertilizer applied during the peak growth season of fish should account for 80% of the total amount of fertilizer applied during the whole period. Therefore, every 5 to 7 days, 60 to 100 kg of fully fermented human and animal manure and 2 to 3 kg of nitrogen and phosphorus fertilizers should be applied per mu.

3. Waterproof temperature is too high

The suitable temperature for fish growth is 23℃~39℃. In the hot season, in order to prevent the water temperature from being too high, new water must be added in time. The amount of new water added every day is about 10% of the total pond water.

4. Prevent hypoxia

In summer, fish consume a lot of oxygen, and the decomposition of a large amount of fertilizer and organic matter can easily cause the pool water to be hypoxic, so the aerator should be turned on in time to increase oxygen. In places where there is no aeration equipment, new water should be poured at a ratio of 10% of the pool water, and artificial aeration should be used at the same time.

5. Anti-floating head

Due to the hot weather, the water pressure decreases, and fish gather on the water surface to breathe. This is called "floating head". Targeted measures should be taken according to the cause and severity of the floating head.

If the floating head is caused by a large amount of feed, oxygenate and add new water in time, and use 6 kg of quicklime, 2 kg of alum or 2 kg of salt per mu. After dissolving, sprinkle the whole pond with the beam hall, and also remove debris, residual grass, floating foam, etc. in the water.

Spring weather is changeable and the temperature difference between day and night is large. It is a critical period for aquatic animals to strengthen their physique, prevent diseases, and improve their survival rate and quality. It is recommended that farmers do the following:

1. Stocking of seedlings

Before stocking, clean and disinfect the pond. Drain the pond water and remove the bottom silt to a thickness of 15-30 cm. After cleaning the fish pond, leave 4-6 cm of water at the bottom of the pond, and use chlorine-containing lime (for aquatic products) to clean and disinfect the pond. Then, after 5-6 days of exposure, return the water to about 1 meter, and filter the water through a 60-mesh silk bag to remove impurities when filling the water. After the water enters, disinfect the water body again with chlorine-containing lime (for aquatic products). After the pond is disinfected for 3 days, the water body can be fertilized and plankton and other bait organisms can be cultivated to make the pond water light green or brown, with a transparency of about 30 cm. According to the biological and environmental adaptability characteristics of different fish species, seedlings should be stocked when the water temperature is suitable. The seedlings should be sufficient in number, of appropriate size, strong in physique, free of disease and injury, and meet the requirements of breeding; the seedling density should be controlled to avoid stress diseases caused by excessive density.

Farmers use Youjiling to improve water quality

2. Water quality control

As the weather warms up and the temperature rises, water should be added continuously to raise the water level. The water temperature is at a relatively low stage in spring. In order to allow better sunlight to shine and raise the water temperature as soon as possible, the initial water level should not be too high. Generally, the water level is 80-100 cm when the seedlings are stocked, and then new water is gradually added, about 10 cm each time, until the water depth is 1.5-2 meters, and it is best to add water when there is sunlight. Intensive ponds should be equipped with special aerators to increase dissolved oxygen in the water and emit toxic and harmful gases. Biological fertilizers should be applied appropriately to keep the plankton in an appropriate density and vigorous physiological state for fish to eat. At the same time, phytoplankton can absorb nutrients in the water and produce oxygen through photosynthesis to improve water quality. Drugs should be used scientifically and water quality should be adjusted regularly every 20 days or so.

3. Feeding and Management

Choose high-quality artificial compound feed, observe the fish's feeding situation, and adjust the daily feed amount in time according to weather conditions, water quality, breeding stage and health status. Since most fish are not fed during the winter, the physical condition of farmed fish is poor, so it is necessary to start feeding early, and the feeding amount can be gradually increased when the temperature is suitable. At the same time, feeds that improve immune function can be appropriately fed, and the feeding frequency can be appropriately increased. In the early stage of feeding carnivorous fish such as mandarin fish, dace fry and roundhead bream fry are fed as opening bait fish. Attention should be paid to the disinfection of bait fish. With the arrival of spring, the water temperature will gradually rise with the air temperature, and the fish's food intake will increase. When the water temperature reaches the suitable growth temperature, the fish's food intake can be restored to about 70% of the normal food intake. At this time, feeding at half of the normal feeding amount can not only meet the fish's food intake, but also will not cause excessive waste and pollution of feeding.

Farmers use Staling feed

As the saying goes, “A year’s plan starts with spring.” The new year’s aquaculture production work has begun in various places. The majority of breeders need to attach great importance to the key links in the entire breeding process, not missing any details, and use <Youjiu Aquatic Animal Health> products when necessary, and strive to achieve the final harvest!

2. Where is the Bletilla striata seedling planting base?

Zhejiang Miaomiaozhuang Biotechnology Co., Ltd.

Base address: No. 2, Tangjialong, Youai Village, Hecun Town, Jiangshan City, Quzhou City, Zhejiang Province

Base scene

3. Where can I farm yellow eels in Jinan? Where can I buy eel fry?

There are not many eels in Jinan. The eel seedlings mainly come from Hubei, Anhui and other places. If you want to breed them, it is recommended to go to other people's farms to learn for a while, because operation is very important.

4. Where can I find Egyptian catfish fry in Maoming City?

Does anyone know? Yulin Gongying Special Seedling Breeding Base is rich in carp seedlings, grass carp seedlings, black carp seedlings, and Egyptian catfish. This wholesale department is located in Guangzhou, Guangdong. Within the scope of Guangdong Province, we have been purchasing Egyptian catfish (not