CN103651190A - Intensive hatcher for American shads - Google Patents

Abstract

The invention discloses an intensive hatcher for American shads. According to the technical scheme, the intensive hatcher comprises a water storing pool, a hatching barrel and a net cage, tab water or disinfected and filtered river water or well water is poured into the water storing pool, aeration is fully performed, and the water temperature is controlled at 20 DEG C; the intensive hatcher is characterized in that a 75w water pump is placed in the water storing pool, and a water supply pipe of the water pump is connected with a water inlet pipe at the bottom of the hatching barrel; the hatching barrel is cylindrical; rows of holes are formed in the water inlet pipe in the hatching barrel, and water of the water pump flows into the hatching barrel through the rows of holes in the water inlet pipe of the hatching barrel; a sponge mat which is 2.5cm in thickness with a base area equal to that of the hatching barrel is placed above the water inlet pipe; 200 thousand fertilized eggs are placed in one hatching barrel; a flow adjusting valve is arranged on the water inlet pipe, and the fertilized eggs are kept turning over in a middle layer of the hatching barrel through flow adjustment; a water outlet of the hatching barrel is arranged at a position 5cm away from the top, and a water outlet pipe is 25mm in diameter; after the fertilized eggs are hatched, the water outlet pipe is placed in the net cage, and fries are hatched, and overflow from the water outlet pipe to enter the net cage.

Description

A kind of American shad intensive hatching device

technical field

The invention relates to a shad fertilized egg hatching device.

Background technique

People have always preferred precious aquatic products, but the Yangtze River shad, one of the "three delicacies of the Yangtze River", has basically disappeared due to overfishing and deterioration of the ecological environment. American shad belongs to the order Herringomorpha, Herringaceae, Shad subfamily, and Sprat genus. It belongs to the same subfamily as the Yangtze River shad in my country. It is very close in taxonomy, and its taste and shape are also very similar. Therefore, it is the Yangtze River shad. Excellent alternative. But at present, the artificial propagation technology of American shad culture is not mature enough, and the success rate of hatching is low, which restricts the large-scale production of American shad.

Contents of the invention

The purpose of the invention is to provide an American shad fertilized egg hatching device which can improve the hatching rate.

The technical scheme of the present invention adopts a water storage tank, a hatching barrel and a net cage, and puts tap water or sterilized and filtered river water or well water in the water storage tank, and fully aerates the water temperature at 20°C; it is characterized in that the water storage Put a 75W water pump in the pool, the water supply pipe of the water pump is connected to the water inlet pipe at the bottom of the hatch; the hatch is barrel-shaped, with a bottom diameter of 35cm and a height of 45cm; There are rows of holes inside, and the water flow of the water pump enters the incubator from the row of holes on the water inlet pipe of the incubator; a sponge pad with a thickness of 2.5cm and the same area as the bottom surface of the incubator is placed above the water inlet pipe to disperse the water flow. The entire bottom surface is kept uniform; 200,000 fertilized eggs are placed in one hatching bucket; a flow regulating valve is set on the water inlet pipe to keep the fertilized eggs turning in the middle layer of the hatching bucket by adjusting the flow rate; the outlet of the hatching bucket is set at 5cm from the top, The diameter of the outlet pipe is 25mm; after the fertilized eggs hatch, the outlet pipe is put into the net cage, and after the larvae come out of the film, they overflow from the outlet pipe and enter the net cage.

The invention uses flowing water for high-density hatching, and controls the distribution of fertilized eggs in the hatching bucket through water flow, avoids the accumulation of fertilized eggs, thereby maintaining sufficient dissolved oxygen and good water quality, and automatically separates the larvae from the membrane, significantly improving Hatching efficiency: after hatching, all the larvae overflow to the collection net cage, the total hatching rate is more than 85%, and the hatching process does not need to wash dirt and change water, and the floor area, water consumption and labor can be reduced by more than 50%, which greatly reduces the need for seedling breeding. cost.

Description of drawings

Fig. 1 is a schematic diagram of the hatching device of the present invention.

Detailed ways

The present invention (referring to accompanying drawing) adopts reservoir 6, hatch bucket 1 and cage 5, puts tap water or the river water or well water through disinfection, filtration in the reservoir, and fully aerates, and water temperature is controlled at 20 ℃; Put a 75W water pump 2 in the reservoir, and the water supply pipe of the water pump is connected to the water inlet pipe at the bottom of the hatch; the hatch is barrel-shaped, with a bottom diameter of 35cm and a height of 45cm; There are rows of holes 7 in the hatching bucket, and the water flow of the water pump enters the hatching bucket from the row of holes on the water inlet pipe of the hatching bucket; a sponge pad 3 with a thickness of 2.5 cm and the same area as the bottom surface of the hatching bucket is placed on the top of the water inlet pipe. The pad disperses the water flow, and the water flow rate is used to maintain uniformity on the entire bottom surface; 200,000 fertilized eggs are placed in one hatching bucket; a flow regulating valve 8 is set on the water inlet pipe, and the fertilized eggs are kept in the middle layer of the hatching bucket by adjusting the flow rate to prevent them from turning over. Stacking, so as to maintain sufficient dissolved oxygen for the hatching of fertilized eggs; the water outlet of the hatching bucket adopts the overflow method, the water outlet is set at a distance of 5cm from the top, and the diameter of the outlet pipe 4 is 25mm; After the membrane, it overflows from the outlet pipe and enters the cage; the whole incubation process does not need to wash the dirt or change the water.

Claims (1)

1. A U.S. shad intensive hatching device adopts a water storage tank, a hatch bucket and a net cage, and puts tap water or sterilized, filtered river water or well water in the water storage tank, and fully aerates, and the water temperature is controlled at 20 ℃; It is characterized by putting a 75W water pump in the reservoir, and the water supply pipe of the water pump is connected to the water inlet pipe at the bottom of the hatching barrel; the hatching barrel is in the shape of a barrel, with a bottom diameter of 35cm and a height of 45cm; the diameter of the water inlet pipe of the hatching barrel is 20mm , the water inlet pipe has a row of holes in the hatching bucket, and the water flow of the water pump enters the hatching bucket from the row of holes on the water inlet pipe of the hatching bucket; a sponge pad with a thickness of 2.5cm and the same area as the bottom surface of the hatching bucket is placed above the water inlet pipe. The water flow is dispersed, and the water flow rate is used to maintain uniformity on the entire bottom surface; 200,000 fertilized eggs are placed in one hatching bucket; a flow regulating valve is set on the water inlet pipe, and the fertilized eggs are kept in the middle layer of the hatching bucket by adjusting the flow; the hatching bucket outlet It is set at 5cm from the top, and the diameter of the outlet pipe is 25mm; after the fertilized eggs hatch, the outlet pipe is put into the cage, and after the larvae come out of the film, they overflow from the outlet pipe and enter the cage.

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