Source and selection of parent fish of Pelteobagrus fulvidraco
The parent fish for artificial propagation can be directly caught and selected from rivers, lakes, reservoirs, ponds and other water bodies. This is a common method for artificial propagation of Pelteobagrus fulvidraco by breeding units at present. If conditions permit, the parent fish of Pelteobagrus fulvidraco can be cultivated by themselves and then selected from them. If you catch parent fish from rivers, lakes, ponds, reservoirs, etc., you should pay attention to the following matters:
specific requirements
① It should be determined that the parent fish should be caught in autumn and winter, when the water temperature is low, it is conducive to selection and operation, especially easy to transport parent fish, and the oxygen consumption is low.
(2) The nets used for catching parent fish should be soft and smooth (usually nylon thread is used as nets). When picking yellow pelteobagrus from gill nets, care should be taken to avoid injury of fish body, so when entering the pond for intensive cultivation, survival rate and fecundity will be affected.
(3) when artificial propagation is carried out by using pelteobagrus fulvidraco and the pelteobagrus fulvidraco caught by rivers as parents, the pelteobagrus fulvidraco is cultured separately. This is beneficial to the cultivation of parent fish, reducing the cultivation cost and achieving the purpose of high reproduction rate.
(1)Selection of parent fish
Pelteobagrus fulvidraco used for parent fish cultivation should be strictly selected, pure species, large individual, strong physique, no disease, complete fins, female fish weight above 75 grams, male fish weight above 100 grams, put into special pond culture. If the parent fish caught from rivers, lakes, ponds or reservoirs in early spring have reached sexual maturity, they can be cultured in special ponds and directly used for reproduction.
(2)Transportation of parent fish
The transportation standard of Pelteobagrus fulvidraco and conventional fish is very high. As far as the size of Pelteobagrus fulvidraco is concerned, parent fish should not be transported for a long time. Due to the hard spines on the pectoral fin and dorsal fin of Pelteobagrus fulvidraco, the fish body is easy to stab each other due to its large carrying capacity and long transportation time. If the nylon bag is oxygenated for transportation, it is easy to puncture the nylon bag, causing serious mistakes in transportation. Therefore, detailed transportation plan should be worked out during parent fish transportation, and transportation personnel should be responsible for ensuring the survival rate of parent fish.
(3)Method for transporting pelteobagrus fulvidraco
There are live water boat transportation, live water truck transportation. The live water truck shall be equipped with direct oxygen supply equipment and double oxygen supply equipment. To prevent damage to oxygen equipment during transportation, causing serious losses.
At the same time, in the transport of live water vehicles, prepared with rubber cloth bag, so that the parent fish less damage. In the developed water network area, the best choice is to transport with live water ship is the most effective method, with the characteristics of large transport volume and convenient transportation, but please pay attention to the water intake of live water ship during transportation to ensure the dissolved oxygen in the water body, and at the same time prevent the polluted water quality in the water flow along the way to ensure the best effect of transportation of parent fish.
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Breeding technique of Shrimp in Crab Tangli River
River shrimp is the scientific name of Macrobrachium rosenbergii, also known as green shrimp. The artificial cultivation techniques of river shrimp seedlings are as follows: 1. The selection and storage of parent shrimp are selected as artificial breeding parent shrimp, which requires standard body shape, pure body color, fat and strong, disease-free and injury-free, better gonadal development, female shrimp body length is more than 6 cm, male shrimp size is larger. It can be selected from naturally caught prawns or from farmed ponds. The selected parent shrimp should be kept in a special pond. The area of parent shrimp pond is 1-3 mu and the water depth is about 1 meter. Parent shrimp
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Baked eggs with silverfish
Ingredients: egg 4, silverfish 1/3LB, green bean seasoning: salt, ginger slices 1, vinegar method: 1. First squeeze the silverfish dry, add less salt, and stir-fry a piece of ginger in an oil pan and set aside. And remove the ginger slices. two. Stir-fry the green beans and set aside. three. Beat 4 eggs, beat well with salt, add a little more cooking oil, heat to 80% to 90% over high heat (the oil is very hot), pour in the eggs and fry into a large omelet, that is, in a few seconds, turn to low heat immediately.
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