CN101558747A - Factory incubation method of Tilapia and production line - Google Patents

Abstract

The invention relates to hatching and seedling raising methods and production equipment of tilapia. The tilapia hatching and seedling production line is composed of water pumps, main water inlet pipes, hatching barrels, seedling collection boxes, water collection tanks, return pipes, reservoirs and other devices. The factory hatching method for tilapia comprises the following steps: (1) mating of broodstock: mating of broodstock is carried out in a net cage, put into broodstock, and can mate and lay eggs when the water temperature reaches more than 20 degrees. (2) Manual ovum extraction: eggs are taken from the mouth of the female fish, and after cleaning, they are transferred to the hatching workshop. (3) Production line incubation: open the main water inlet valve of the production line and start the water pump. The fish eggs are transferred into the hatching bucket, and the valve size of the water inlet pipe of the hatching bucket is adjusted. The water flow makes the eggs roll in the middle and lower part of the bucket. The invention can carry out large-scale, multi-season and all-weather production of tilapia fry, meet the needs of seed cultivation in different seasons, and give full play to the role of technical equipment and fishery technology in seedling production.

Description

Tilapia factory hatching method and production line

technical field

The invention belongs to breeding technology and equipment of aquatic products, in particular to hatching and seedling raising methods and production equipment of tilapia.

Background technique

Tilapia is an excellent species recommended by the Food and Agriculture Organization of the United Nations. It has high yield, strong disease resistance, wide appetite, and is easy to breed. Industrialization and export earnings have been formed in my country, especially in the south of my country, where breeding is very extensive. The seed breeding method of tilapia at present mainly is to breed naturally in ponds by female and male broodstock, and fish fry are artificially fished in ponds with dip nets after hatching. This kind of operation is blind, and it is difficult to clean the fish fry in the pond manually; the broodstock still has the habit of eating eggs and fry in the pond; Competing with adult fish for bait, water, and fertilizer seriously affects the efficiency and quality of seedling production. On the other hand, the fry breeding period can only be limited to a shorter time in summer. Such fish fry breeding and breeding methods occupy a large pond area, have a short production season, are greatly affected by weather, have low production efficiency, and have uneven seed sizes, which cannot meet the large-scale demand for different seasons and different specifications of fish fingerlings.

Contents of the invention

In order to solve the present situation that the current tilapia fry production process only relies on natural self-production, low production efficiency, short production season, and low technological content, the present invention provides a tilapia hatching method and production line equipment, which can carry out multi-season, all-weather , Large batch, factory production with automatic control hatching.

The technical solution adopted by the present invention to solve its technical problems is:

A factory hatching production line for tilapia, characterized in that:

It is composed of water pump, main water inlet pipe, hatching bucket, seedling collection box, water collection tank, return pipe, water storage tank and other devices connected.

The water pump is arranged in the water storage tank and connected with the main water inlet pipe.

The water storage tank collects the return water and circulates the water supply.

A water inlet valve is installed on the main water inlet pipe and is connected with the water inlet pipe of the incubator, and a valve that can adjust the water flow is installed on the upper part of the water inlet pipe of the incubator;

The bottom of the hatching bucket is conical or hemispherical and fixed at a height of about 1 meter from the ground for easy operation. The water inlet of the incubator adopts the injection type, that is, the water inlet pipe enters the incubator from the upper part, and the distance between the nozzle and the bottom is 2-5 mm. The outlet pipe is opened at about 35 millimeters from the upper end of the bucket, and is inclined downward.

The seedling collection box is placed above the water collection tank, with water outlet holes on the side and sealed with dense gauze to prevent eggs and fry from flowing out.

The sump collects the water flowing out from the seedling box, and flows to the reservoir through the return pipe.

A single incubator and seedling collection box form a hatching unit with complete hatching functions; several hatching units are connected in parallel to form a single production line; several single production lines are connected in parallel to form a hatching workshop of a corresponding scale.

A kind of tilapia factory incubation method, its feature comprises the following steps:

(1) Mating of broodstock: The mating of broodstock is carried out in a net cage, and 3-4 kg of broodstock are placed in the net cage per square meter. When the water temperature reaches more than 20 degrees, they can mate and lay eggs.

(2) Manual ovum extraction: eggs are taken from the mouth of the female fish, and after cleaning, they are transferred to the hatching workshop.

(3) Production line incubation: open the water inlet valve on the main water inlet pipe on the production line, and start the water pump. Put the fish eggs into the hatching bucket, adjust the valve size of the water inlet pipe of the hatching bucket, the water flow makes the eggs roll in the middle and lower part of the bucket, after the fry hatch, they flow into the seedling collection box, and the fry are collected for seedling cultivation.

Beneficial effects of the present invention: it can carry out large-scale, multi-season and all-weather production of tilapia fry, meet the needs of seed cultivation in different seasons, give full play to the role of technical equipment and fishery technology in seedling production, and promote tilapia The development of the industry is of great significance.

Description of drawings

Figure 1 is a schematic diagram of the hatching production line, and the arrows in the figure indicate the direction of water flow.

Fig. 2 is a schematic diagram of an incubator and a seedling collection box, and the arrows in the figure show the direction of water flow.

In Fig. 1: 1 water pump, 2 water inlet valves, 3 main water inlet pipes, 4 hatch bucket water inlet valves, 5 hatch bucket water inlet pipes, 6 hatch buckets, 7 hatch bucket outlet pipes, 8 seedling collection boxes, 9 water collection tanks, 10 return pipes, 11 reservoirs.

In Fig. 2: 4 hatch bucket water inlet pipe valves, 6 hatch buckets, 7 hatch bucket outlet pipes, 8 seedling collection boxes, 12 grid outlet holes.

Detailed ways

Mating in the net cage of the parent fish: The mating of the parent fish is carried out in the net cage, the net cage is rectangular, the ratio of length to width is 3:1, the area is 18 square meters, the depth is 1 meter, and the mesh size is 1 mm. The net cage is arranged in the pond, and the pond covers an area of 5 mu. The net cage is 0.3 meters above the water surface, and the distance between the net cage and the net cage is 1.2 meters. The ratio of female and male broodstock is 2:1, and 3.5 kg of broodstock are placed in cages per square meter. When the water temperature reaches above 20 degrees, they mate and lay eggs, and eggs are collected after 3 days.

Collection of fertilized eggs: During collection, the gill cover of the female fish is opened by hand, and the eggs in the mouth are washed out with water. After cleaning and removing impurities, the eggs are transferred to the hatching workshop.

Production line hatching (see attached photo): 16 net cages were collected, about 520,000 eggs were collected, and two production lines were opened. Open the water inlet valve 2 on the main water inlet pipe 3 on the production line, turn on the water pump 1, and the water in the reservoir 11 flows into the seedling collection device through the water inlet pipe 3, the hatch bucket water inlet pipe 5, the hatch bucket 6, and the hatch bucket outlet pipe 7. 8 and enter the sump 9 through the mesh outlet hole 12 and return to the reservoir 11 through the return pipe 10. About 20,000 fish eggs are put into each hatching bucket, and the size of the water inlet pipe valve 4 of the hatching bucket is adjusted, so that the current makes the ovum toss in the lower part of the bucket. Turn on the temperature controller to make the hatching water temperature at 28 degrees. After the fry hatch, they flow into the seedling collection box, collect the fry, and transfer them to the pond for seed cultivation.

Claims (3)

1, a kind of industrial Tilapia hatching production line is characterized in that:

By water pump, main water inlet tube, hatching pail, collection seedling case, water leg, return duct, devices such as cistern connect to form.

2, industrial Tilapia hatching production line as claimed in claim 1 is characterized in that:

(1) hatching pail water inlet pipe top is equipped with the valve that can regulate the current size;

(2) collection seedling case places the water leg top, and the side has apopore and with close gauze involution.

3, a kind of factory incubation method of Tilapia, its feature may further comprise the steps:

(1), parent population mating: the parent population mating is carried out in net cage, and every square metre of net cage is put 3-4 kilogram parent population, but reaches 20 degree mate and oviposit just when above when water temperature;

(2) manually get ovum: from the raun oral cavity, get ovum, after cleaning, change the hatching workshop over to;

(3), production line hatching.Open the inlet valve on the main water inlet tube on the production line, open water pump.Fish-egg changes in the hatching pail, regulates hatching pail water inlet pipe valve size, and current make ovum seethe in the bucket middle and lower part, after fry hatches, flows into collection seedling case, collects fry and carries out seed rearing.

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