The high-yielding cultivation method of Hsu's flatfish

(1) Nursery facilities Seahorse nursery facilities are mostly built in hippocampal breeding farms. Seashore construction sites close to the natural living conditions of hippocampus should be selected as far as possible. It requires less wind and waves, fresh water quality, seawater salinity in the range of 10-30 ,, fresh water sources, and convenient transportation. Its main facilities are: nursery ponds: It is mainly used for the cultivation of hippocampal primary seedlings and the breeding of pro-haima horses. The cement pool, with an area of ​​1-2m deep and 0.6-1.0m deep, is buried in the ground 2/3 of the pool, making the water temperature inside the pool more stable. The pool should be equipped with a row of water injection devices. The bottom of the tank and the wall of the tank should be painted black. The pool can be indoors or outdoors. The light in the pool should be sufficient, but direct sunlight should be avoided. There should be shading facilities.
Juvenile fish pond: It is used to culture hippocampal juveniles up to about 6cm in size after 15 days of culture, and it can also be used as a pro-Hippocampus intensive pool. The cement pool is generally larger than the nursery ponds, generally 2-6 m2, and the depth is about 0.8-1,0 m. Other requirements are the same as nursery ponds. In some places, there is no juvenile fish pond. The fry are cultivated in the nursery pond for about one month, and the fish is directly cultivated to grow into a pond.
(b) Bred broodstock to the pro-fish pond The aforementioned nursery ponds and juvenile fish ponds may be used, or a separate pool may be constructed. Its stocking density is about 50% of adult fish culture. Guangdong Shantou Seawater Farm raises broodstock at a density of 20 tails/m' of water. For bait, intensive culture should be conducted with high-quality, varied, and palatable baits. Usually three times a day, the amount of feed should be based on slightly more than the amount of food. If there is a lack of bait, the gonads of the broodstock will degenerate, or the resulting fry will have poor physique, and the survival rate will be low. In addition, in the process of intensive intensive cultivation, strict management work must be done and operations must be done carefully to ensure stable water temperature and fresh water. Premature delivery. Before sexual maturity is reached, the male and female hippocampus need to be kept separately to prevent excessive chase and affect the normal development of the broodstock, and even affect the quality of offspring. After sexual maturity, the water temperature is above 20°C, and the male and female hippocampus can be polycultured at a ratio of 1:1, allowing them to be fertilized in the pool.
(C) When the fertility of the broodstock is just fertilized, the broodstock has a small, hard, yellowish-brown or gray-brown color. As the embryo develops within it, the nursery bag expands, is soft, and has a dark brown color. Should be timely moved to another breeding pond feeding, so as not to chase each other before the emergence of seedlings, affecting the development of the embryo body. Prenatal general acceleration of breathing, emotional tension, looking for quiet production at seedlings, this time the nursery bag mouth gradually opened in a circular shape, the male body continued to straighten and bend, the abdomen from left to right swing, Miao will produce water from the childcare bag mouth. Each time the number of seedlings produced is small, the initial production can reach dozens of tails and gradually decrease thereafter. The time of production and seedling production is mostly in the early morning, and the number of births per child lasts from several minutes to ten minutes. After the broodstock are raised and raised, the broodstock and fry should be kept in separate ponds in time to facilitate management and prevent the fry from swallowing fry.
(d) Fry cultivation generally refers to the process of growing from primary seedlings to 6cm body length fry. Fry cultivation is an important stage for artificially cultured hippocampus. At this stage, fry are most susceptible to disease and die in large numbers. The low survival rate in the breeding process is mainly at this stage.
The physique status of primary seedlings is the basic factor that determines the survival rate of fry. If the umbilical sac does not eliminate the primary seedlings, the bred broodstock will be treated improperly, or the premature fish fry caused by sudden changes in water temperature and water quality will have low survival rate. Many frail, poor-quality individuals who do not eat on the same day are also difficult to cultivate. The environmental conditions are suitable or not, and often have a great influence on the survival rate. Therefore, the following points should be strictly observed in the fry cultivation work.
1. Water quality The water used for cultivation should be clean, fresh, non-polluting and invincible. The seawater with a high concentration of monosodium algae also often causes fry death. Therefore, seawater using precipitation treatment under normal conditions has a good effect of cultivation. Pool water should be replaced once every other day. If you can use water culture, the survival rate is higher.
2. The light should be sufficient, but avoid direct sunlight, and strive to indoor culture.
3. Water temperature requires stable temperature, should be controlled at 20-28 °C, not less than 18 °C, not more than 30 °C. The sudden temperature difference does not exceed 2°C. In cases where the temperature difference is significant, a reservoir should be provided, ready for use the evening before the water change. Preheating the pool is better.
4. The fries with a healthy diet can feed soon after they are produced, so they should be fed the same day. The bait should be strictly controlled in size and palatability, with appropriate quantities and freshness. Output 2- The fish fry were fed with copepods of the nauplii within 3 days, after which they grew small, followed by large copepods. Normally, it should be fed 3 to 4 times a day, and the amount of feed should be controlled in an appropriate amount, so that there is no remaining feed in the pool overnight, so as not to affect the water quality.
5. Stocking densities should not be too dense. Under normal circumstances, about 200 seedlings per cubic meter of nursery stock can be put into use. After about 15 days of cultivation, then rearing to juvenile fish ponds, the density can be about 1000.

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Below image as a reference:

waist heating pad

Waist Heating Pad

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