Site selection of cage for cage culture of Pelteobagrus fulvidraco
The main results are as follows: 1) Micro-running water and waters with certain wind and waves are suitable to set up cages for large and medium-sized reservoirs, lakes, rivers and other water bodies, compared with ponds, they are characterized by certain wind waves and micro-flowing water. The location of cage culture of Pelteobagrus fulvidraco requires certain wind waves and micro-running water, and the reservoirs and lakes with wind and waves no more than 5 are more suitable for cage culture of Pelteobagrus fulvidraco. In addition, it is required to have some flow velocity, that is, micro-flow, which is appropriate at 0.05 to 0.2 meters per second.
2) the water quality is not polluted by industry. for the water quality of Pelteobagrus fulvidraco cage culture, there is no pollution such as industrial "three wastes", which is fully in line with the water quality standard of pollution-free culture.
3) there is a certain water depth and good bottom quality because Pelteobagrus fulvidraco has the habit of being afraid of light, so the waters with cages are required to have a certain depth. Generally speaking, Pelteobagrus fulvidraco can be cultured in cages in lake branches, reservoir bays and rivers where the current is more than 3.0 meters, and the best water depth is between 3 and 6 meters. In this way, the cage will not run aground in the dry season; in the flood season, the cage will not be affected because it can rise and fall. However, in the waters where the current velocity is too high, cage can not be set up to carry out Pelteobagrus fulvidraco culture. For the bottom material, it is required that there is no too deep silt and contains more organic and inorganic substances than the pollution-free standard.
4) because the suitable growth temperature of Pelteobagrus fulvidraco is 22-28 ℃, when choosing the cage address, we should choose the lake branch and reservoir bay with better shelter conditions with sufficient sunlight. If the cage is set in the area where the sun is difficult to shine for a long time, then the temperature of the water body is more difficult to meet the needs of the growth of Pelteobagrus fulvidraco. If the cage in the water body can not avoid the strong wind, it will affect the stability and safety of the cage. In addition, the location of cages requires avoiding complex places such as docks, gates and waterways.
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Prevention and treatment of enteritis in cultured Pelteobagrus fulvidraco
(1) pathogenic Aeromonas punctata. (2) the diseased fish had enlarged abdomen, red and swollen anus, light pressure on the abdomen, yellow mucus outflow from the anus, and diseased fish wandered alone. When the abdomen of the fish was cut open, the esophagus and foregut were congested and inflamed in mild cases, and the whole intestine was reddish in severe cases.
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Control of rotifer in cultured Pelteobagrus fulvidraco
[etiology] the pathogens were Trichodina and Trichodinella. It spreads or leaves the fish by direct contact and swims freely in the water to transfer the host. [symptoms] pathogens are mainly parasitic on the gills, skin and fins of Pelteobagrus fulvidraco. When a small number of parasites
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