CN204518889U - A kind of Tilapia mossambica fry nursery pond based on net cage - Google Patents

Abstract

The utility model discloses a net cage-based tilapia fry nursery pond, which comprises a nursery pond body, a wooden bridge is arranged on the nursery pond body, the wooden bridge is parallel to both sides of the wide side of the nursery pond body, and the wooden bridge includes a support, A panel is laid on the support, and the two ends of the panel are set up on the long side of the nursery pond body; steel wire ropes are arranged on both sides of the wooden bridge and the wide side of the nursery pond body, and a cage is arranged on the wire rope, and the long side of the cage Parallel to the wide side of the pond, the four corners of each cage are fixed with sandbags; the mesh of the cage is 60 mesh; air stones and food platforms are arranged in the cage. The method of the utility model utilizes net cages to cultivate tilapia fry, and can simultaneously cultivate 4.2 million fry, and the survival rate reaches more than 90%. The utility model saves land resources, simplifies the feeding and management of fish fry, improves the survival rate of fish fry, reduces the cost of raising seedlings, and thereby increases the coverage rate of fine tilapia species.

Description

A cage-based tilapia fry nursery pond

technical field

The utility model belongs to the technical field of aquaculture, in particular to a net cage-based tilapia fry nursery pond.

Background technique

Tilapia is a small and medium-sized fish. It is a freshwater farmed fish cultivated by key scientific research in the world's aquaculture industry. It is also known as one of the main sources of animal protein in the future. It is my country's main freshwater cultured species and export-oriented species. Native to Africa, tilapia is a tropical fish belonging to the cichlid family. It has the characteristics of miscellaneous food, low oxygen tolerance, and strong fecundity. Southern regions such as Hainan, Guangdong, Guangxi and Fujian have become the main production areas of tilapia in my country, and the breeding area and production are increasing year by year. The main cultured species of tilapia in my country are Gifu tilapia and Oni tilapia.

Fish farming in net cages is a high-tech farming project developed in recent years. It has the characteristics of high breeding density, high output, simple and convenient operation, easy management, and high survival rate. Cage fry is a production method in which cages made of mesh are placed in ponds for fry cultivation. High-density intensive cultivation of fry can be carried out, and the box body is preferably rectangular. The area of each net cage is several square meters to more than ten square meters, and the height of the cage is 1.5-1.8 meters.

For a long time, the cultivation methods of tilapia fry mainly include seedling cultivation in small ponds and ponds. The traditional method of seedling cultivation in small ponds has the characteristics of occupying a large area of land, small unit density of cultured fry, small number of cultured fry, and cumbersome breeding and management. Since the beginning of the 21st century, the tilapia aquaculture industry in my country has developed rapidly, and large-scale aquaculture has begun to take shape. The traditional method of raising seedlings in small pools cannot meet the needs of cultivating large batches of synchronized seedlings. In pond breeding, the size of the fry cannot be synchronized, and it is difficult to obtain batches of high-quality developing fry.

At present, in my country, due to the high cost of the nursery workshops for industrialized seedlings and the imperfect technology of industrialized seedlings, the degree of industrialized seedlings for tilapia is not high. Explore the method of cultivating tilapia fry in cages in ponds, effectively save land resources, simplify fry feeding and management, reduce seedling cost, efficiently produce high-quality tilapia fry, increase the coverage of tilapia fine species, and provide tilapia Large-scale fish farming provides technical support for high-quality seedlings.

Utility model content

The purpose of this utility model is to provide a net cage-based tilapia fry nursery pond, which uses the cage fry cultivation technology to save land resources, simplify the fry breeding and management work, improve the survival rate of fry, reduce the cost of nursery, and produce large batches efficiently Synchronize high-quality tilapia fry, thereby increasing the coverage of fine tilapia species.

The technical scheme adopted by the utility model is a net cage-based tilapia fry nursery pond, which is characterized in that it includes a nursery pond body, a wooden bridge is arranged on the nursery pond body, and the wide side of the wooden bridge and the nursery pond body The two sides are parallel, the wooden bridge includes a bracket, and a panel is laid on the bracket, and the two ends of the panel are set up on the long side of the nursery pond body; steel wire ropes are arranged on both sides of the wooden bridge and the wide side of the nursery pond body, and the wire rope is set There are net cages, the long side of the net cage is parallel to the wide side of the pond, and the four corners of each net cage are fixed with sandbags; the net mesh of the net cage is 60 mesh; air stones and food tables are arranged in the net cage.

The utility model is also characterized in that,

There are at least two wooden bridges.

There are at least two net cages.

The length × width × height of the nursery pond body is 50.0m × 30.0m × 2.0m; the width of the wooden bridge is 1.0m; the length × width × height of the cage is 4.0m × 2.0m × height 1.5m.

The gap between each row of wooden bridge cages and another row of wooden bridge cages is 5.0m.

There are at least two air stones and dining tables.

The beneficial effects of the utility model are: the method of the utility model utilizes net cages to cultivate tilapia fry, and a pond can simultaneously cultivate 4.2 million fry, and the survival rate reaches more than 90%. The utility model saves land resources, simplifies the feeding and management of fry, improves the survival rate of fry, reduces the cost of raising seedlings, and efficiently produces large quantities of synchronized high-quality tilapia fry, thereby increasing the coverage rate of fine tilapia species.

Description of drawings

Fig. 1 is the structural formula intention of the tilapia fry nursery pond based on net cage of the present utility model;

Fig. 2 is the plan view that the utility model arranges net cage in the pond.

In the figure, 1. Nursery pond body, 2. Wooden bridge, 3. Support, 4. Panel, 5. Steel wire rope, 6. Net cage, 7. Air stone, 8. Food table.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The utility model provides a net cage-based tilapia fry nursery pond, as shown in Figure 1 and Figure 2, comprising a nursery pond body 1, a wooden bridge 2 is arranged on the nursery pond body 1, and the wooden bridge 2 and the nursery pond body The two sides of broadside of 1 are parallel, and wooden bridge 2 comprises support 3, is laid with panel 4 on the support 3, and the two ends of panel 4 are erected on the long side of nursery pool body 1; Both sides of wooden bridge 2 and nursery pool body 1 All be provided with steel wire rope 5 on the broadside of wire rope 5, be provided with net cage 6 on the steel rope 5, the long side of net cage 6 is parallel with the wide side of pond, and 4 corners of each net cage 6 are fixed with sandbag; The order is 60 orders; the net cage 6 is provided with an air stone 7 and a food table 8.

There are only 2 wooden bridges 2 at least. Net cage 6 is provided with at least two. The length × width × height of the nursery pool body 1 is 50.0m × 30.0m × 2.0m; the width of the wooden bridge 2 is 1.0m; the length × width × height of the cage 6 is 4.0m × 2.0m × height 1.5m. The gap between each row of wooden bridge cages and another row of wooden bridge cages is 5.0m. There are at least two air stones 7 and food tables 8 .

The utility model also provides a kind of seedling raising method based on the tilapia fry of net cage, adopts the tilapia fry nursery pond based on net cage described in above-mentioned claims, specifically implements according to the following steps:

Step 1. Fill the tilapia fry nursery pond based on the cage. The water is filtered through two layers of 60-mesh mesh. Above 4.0mg/L, the water depth is 1.5m. Change the water once every 7 days, and the water change volume is 30% of the pool water

Step 2. The fish fry collected for 2 days after filming were soaked in 20‰ of salt water for 10 minutes, and put into cages for cultivation. Each cage was stocked with 50,000 fish, and the density was 6250 fish/㎡;

Step 3. Nursery treatment, feeding bait, the opening bait for fry is a mixed feed of eel feed and fingerling feed, the ratio is 5:5, mixed with water and fed into a ball, the feeding amount is 50g/10,000·day, divided into 4 Feeding times/day; feeding time is 8:00-9:00 in the morning, 11:00-12:00 in the afternoon, 4:30-5:30 in the afternoon, and 9:00-10:00 in the evening; breeding for 12 days , Tilapia fry reach 2.2-2.5cm in length, put them into breeding or sell them; during the seedling treatment, check the tilapia fry with a microscope every 3-4 days, if there is an outbreak of trichomoniasis, immediately spray the whole pond with a concentration of 0.7ppm of copper sulfate and ferrous sulfate (5:2) will kill the trichomonas on the fry; if an outbreak of third-generation entomosis is found, immediately sprinkle the formalin solution on the whole pond with a concentration of 60ppm.

Example 1

The nursery pond (tilapia fry nursery pond based on cages) is 1500㎡, and the size of the pond is length (50.0m)×width (30.0m)×height (2.0m). There are 4 rows of wooden bridges in the pond. The wooden bridge is parallel to both sides of the wide side of the pond. The wooden bridge is supported by wooden piles, and the bridge deck is made of wooden boards and fixed with iron nails. The width of the wooden bridge is 1.0m. Steel wires are placed on both sides of the wooden bridge and cages are hung. The gap between each row of wooden bridge cages and the other row of wooden bridge cages is 5.0m. The number of net cages in each row is 7, and 84 net cages can be arranged in the whole pond. The cages are hung on both sides of the wooden bridge and both sides of the pond. The long sides of the cages are parallel to the wide sides of the ponds. The four corners of each cage are fixed with sandbags to shape the cages. The specification of the net cage is the specification length (4.0m) x width (2.0m) x height (1.5m) of the net cage, and the mesh is 60 mesh. Each cage is equipped with 4 air stones and 4 food tables (0.3㎡). The water for pond seedlings is filtered through two layers of 60-mesh mesh. The water temperature is 25.0-28.0°C, the pH value is 7.2-7.5, the transparency is 25.0-30.0cm, the dissolved oxygen is above 4mg/L, and the water depth is 1.5m. Change the water once every 7 days, and the water change volume is 30% of the pool water. One blower with a power of 3000 watts.

According to the above process conditions:

1. The nursery pond is 1500㎡, and the size of the pond is length (50.0m)×width (30.0m)×height (2.0m). The water for pond seedlings is filtered through two layers of 60-mesh mesh. The water temperature is 25-28°C, the pH value is 7.2-7.5, the transparency is 25-30cm, the dissolved oxygen is above 4.0mg/L, and the water depth is 1.5m. Change the water once every 7 days, and the water change volume is 30% of the pool water.

2. Soak the collected 2-day-old fry in 20‰ salt water for 10 minutes. Put them into net cages for cultivation, each net cage is stocked with 50,000 fish, and the density is 6250 fish/㎡.

3. The opening bait for the fry is a mixed feed of eel feed and fingerling feed, the ratio is 5:5, and it is stirred with water to form a ball and fed. The feeding amount is 50g/10,000·day, divided into 4 times/day for feeding. Feeding time is 8:00-9:00 am, 11:00-12:00 noon, 4:30-5:30 pm, 9:00-10:00 pm. After 12 days of breeding, the body length of tilapia fry reaches 2.2-2.5cm, which can be put into breeding or sold.

4. Every 3-4 days, use a microscope to check the tilapia fry. If there is an outbreak of trichomoniasis, immediately sprinkle copper sulfate and ferrous sulfate (5:2) on the whole pond at a concentration of 0.7ppm to kill the wheels on the fry. insect. If an outbreak of third-generation entomosis is found, the whole pond is immediately sprinkled with formalin solution at a concentration of 60 ppm.

The method of the utility model utilizes net cages to cultivate tilapia fry, and one pond can simultaneously cultivate 4.2 million fry, and the survival rate reaches more than 90%. The utility model saves land resources, simplifies the feeding and management of fry, improves the survival rate of fry, reduces the cost of raising seedlings, and efficiently produces large quantities of synchronized high-quality tilapia fry, thereby increasing the coverage rate of fine tilapia species.

The above embodiments of the utility model have been described in detail in conjunction with the accompanying drawings, but the utility model is not limited to the above embodiments, and various changes can be made within the scope of knowledge of those skilled in the art.

Claims (6)

1. a kind of tilapia fry nursery pond based on net cage, it is characterized in that, comprise nursery pond body (1), described nursery pond body (1) is provided with wooden bridge (2), described wooden bridge (2 ) is parallel to the wide sides of the nursery pond body (1), the wooden bridge (2) includes a support (3), and a panel (4) is laid on the support (3), and the two sides of the panel (4) The ends are erected on the long side of the nursery pool body (1); steel wire ropes (5) are arranged on both sides of the wooden bridge (2) and the wide sides of the nursery pool body (1), and the steel wire ropes (5) Net cage (6) is provided with, and the long side of described net cage (6) is parallel with the broadside of pond, and 4 angles of each net cage (6) are fixed with sandbag; The mesh of described net cage (6) It is 60 orders; said cage (6) is provided with an air stone (7) and a food table (8). 2. the tilapia fry nursery pond based on net cage according to claim 1, is characterized in that, described wooden bridge (2) establishes only 2 at least. 3. the tilapia fry nursery pond based on net cage according to claim 1, is characterized in that, described net cage (6) is provided with only two at least. 4. the tilapia fry nursery pond based on net cage according to claim 1, is characterized in that, the length * width * height of described nursery pond body (1) is 50.0m * 30.0m * 2.0m; Wooden bridge (2) is wide 1.0m; The length * width * height of cage (6) is 4.0m * 2.0m * height 1.5m. 5. the tilapia fry nursery pond based on net cages according to claim 2, is characterized in that, the gap between the net cages of each row of wooden bridges and the net cages of another row of wooden bridges is 5.0m. 6. the tilapia fry nursery pond based on net cage according to claim 1, is characterized in that, described air stone (7) and food table (8) are all provided with at least two.