CN103651202B - A kind of large yellow Crocker, mud crab three dimensional-breeding device and cover breeding method thereof - Google Patents

Abstract

The present invention relates to a kind of large yellow Crocker, mud crab three dimensional-breeding device and method, comprise floating net and crab pot, described floating net comprises floating frame and mesh sheet, described floating frame is a closed polygon framework, below described floating frame, float is installed, described float is connected on the framework of floating frame into strips, described floating frame periphery is around being provided with a hoop net sheet, described mesh sheet surrounds the matching form of the container of a upper opening, upper opening and floating frame, described float is placed with crab pot, described crab pot sidewall has through hole, described crab pot is furnished with lid.While the invention has the advantages that Pseudosciaena crocea, take full advantage of breeding water body, on net cage upper strata, single body is raised in cages mud crab, avoids cutting one another's throat of mud crab, survival rate 95%; Bait is fully used in addition, refuse little residue, enhances the self-purification capacity of breeding water body, realizes the balance of fishery biologic environment, while acquisition economic benefit, effectively completes the ability to pool carbon of fishery.

Description

A three-dimensional culture device for large yellow croaker and blue crab and its nested culture method

technical field

The invention belongs to the technical field of three-dimensional cultivation of fish and crabs, and in particular relates to a three-dimensional cultivation device for large yellow croakers and blue crabs and a nesting cultivation method thereof.

Background technique

Global warming has seriously affected human production and life. In order to alleviate the warming trend and reduce greenhouse gas emissions, developing a low-carbon economy has become an inevitable choice for all countries. Three-dimensional marine ecosystem farming is a green and low-carbon farming model at the level of marine ecosystems. This model optimizes the population structure of the marine ecosystem, utilizes the interaction between different populations, improves the efficiency of carbon sinks, and ultimately achieves a win-win environment and economic benefits.

Large yellow croaker is one of the traditional "four major marine products", the main economic fish in my country's coastal waters; large yellow croaker is mainly cultured in coastal cages, although it makes up for the shortage caused by the shortage of wild large yellow croaker resources, but the water body has not been fully utilized , the fish species are easy to jump out of the box, and the light is too strong to affect the growth and feeding of large yellow croakers. As a traditional mariculture species, blue crabs have many advantages such as rapid growth, delicious meat and great market potential; blue crabs are highly aggressive, and killing each other is one of the main reasons affecting their survival rate. The present invention implements three-dimensional development on the vertical level of the net cage, and the blue crabs are raised in a single cage on the upper layer of the net cage, which can avoid cannibalism and has a high survival rate; the large yellow croaker cultured in the net cage can effectively shade and keep the water environment in the net cage stable , to effectively prevent the large yellow croaker from jumping out of the box; the large yellow croaker can also eat the excess bait in the mud crab culture. The balance of fishery ecological environment, while obtaining economic benefits, effectively completes the carbon sink function of fishery.

Contents of the invention

The technical problem to be solved by the present invention is to provide a three-dimensional culture device for large yellow croaker and blue crab and a nesting method thereof, which have high bait utilization and good economic benefits.

The technical solution adopted by the present invention to solve the technical problems is to provide a three-dimensional cultivation device for large yellow croaker and blue crab, including a floating net and a crab cage, the floating net includes a floating frame and a mesh, and the floating frame is a Closed polygonal frame, floats are installed under the floating frame, the floats are connected to the frame of the floating frame in strips, a circle of mesh is installed around the floating frame, and the mesh surrounds a container with an upper opening , and the upper opening matches the shape of the floating frame, a crab cage is placed on the float, a through hole is opened on the side wall of the crab cage, and a cover is provided on the crab cage.

The floating frame is rectangular, and the floats are arranged along the long side of the floating frame.

The floating frame, the float, the crab cage and the cover are made of bamboo or wood.

The mesh is a soft non-knotted mesh with a mesh size of 20 to 35 mm.

The crab cage is 40 centimeters long, 30 centimeters wide and 16 centimeters high, made of bamboo or wood.

A method for raising large yellow croakers and blue crabs in a three-dimensional breeding device for large yellow croakers and blue crabs, the steps are as follows:

(A) Choose to breed in a sea area with little wind and waves. There is no industrial "three wastes" pollution source in the upstream of the sea area. The water depth of the sea area is more than 6 meters. The bottom of the sea area is silty. -30℃, salinity 20‰-25‰, transparency 1.0m;

(B) The mesh is surrounded by a cuboid culture area of 3.2 meters × 3.2 meters × 3.5 meters, and the size of the fish species placed in the area is 100-150 grams;

(C) Throwing large yellow croaker fry and blue crab fry, select the fish fry and crab fry cultivated in the offshore area. Malformation;

(D) Feeding: bait was fed twice a day, once in the morning and in the evening; the feeding amount of the day was matched with the feeding situation, weather, water color and tide changes of the previous day; the bait was mainly cold Fresh small miscellaneous fish;

(E) Check the condition of fish species 3 times a day in the morning, middle and evening, and prevent hypoxia in contiguous breeding areas with poor water flow and fertile water quality;

(F) As the large yellow croaker grows, maintain a reasonable density of fish species in the breeding area by sorting, and at the same time adjust fish species of different sizes in the breeding area, and rearrange them so that the specifications of the fish species in the same breeding area are consistent;

(G) Change and wash all kinds of algae that are easy to grow on the mesh from time to time, so as to keep the mesh from being blocked and the water flowing smoothly.

Beneficial effect

The present invention has the advantages of fully utilizing the cultured water body while the large yellow croaker is cultured in the net cage. In the upper layer of the net cage, the blue crab is raised in a single cage, which avoids mutual killing of the mud crab, and the survival rate reaches 95%; in addition, the bait is fully utilized , less waste residues, enhanced the self-purification capacity of the aquaculture water, to achieve the balance of the fishery ecological environment, while obtaining economic benefits, effectively completed the carbon sink function of the fishery. Therefore, the present invention is a high-yield, high-efficiency, ecologically healthy three-dimensional culture method for large yellow croakers and blue crabs.

Description of drawings

Fig. 1 is a structural schematic diagram of a three-dimensional breeding device for large yellow croaker and blue crab according to the present invention.

Fig. 2 is a schematic structural diagram of the floating net of the present invention.

Fig. 3 is a schematic structural view of the crab cage of the present invention.

Detailed ways

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

As shown in Figures 1 to 3, a three-dimensional cultivation device for large yellow croaker and blue crab includes a floating net and a crab cage 4, and the floating net includes a floating frame 1 and a net sheet 3, and the floating frame 1 is a closed polygon Frame, the floater 2 is installed under the floating frame 1, and the floater 2 is connected on the frame of the floating frame 1 in a strip shape, and a circle of mesh 3 is installed around the floating frame 1, and the mesh 3 is surrounded by A container with an upper opening, and the upper opening matches the shape of the floating frame 1, a crab cage 4 is placed on the float 2, a through hole is opened on the side wall of the crab cage 4, and a cover is provided on the crab cage 4 5.

The floating frame 1 is rectangular, and the floats 2 are arranged along the long side of the floating frame 1 .

Described floating frame 1, float 2, crab cage 4 and cover 5 are made of bamboo or wooden material.

The mesh 3 is a soft non-knotted mesh with a mesh size of 20 to 35 mm.

Described crab pot 4 is long 40 centimetres, wide 30 centimeters, high 16 centimetres, is made of bamboo or wooden material.

A method for raising large yellow croakers and blue crabs in a three-dimensional breeding device for large yellow croakers and blue crabs, the steps are as follows:

(A) Choose to breed in a sea area with little wind and waves. There is no industrial "three wastes" pollution source in the upstream of the sea area. The water depth of the sea area is more than 6 meters. The bottom of the sea area is silty. -30℃, salinity 20‰-25‰, transparency 1.0m;

(B) the mesh 3 is surrounded by a cuboid culture area of 3.2 meters × 3.2 meters × 3.5 meters, and the fish species are put into the area with a specification of 100-150 grams;

(C) Throwing large yellow croaker fry and blue crab fry, select the fish fry and crab fry cultivated in the offshore area. Malformation;

(D) Feeding: bait was fed twice a day, once in the morning and in the evening; the feeding amount of the day was matched with the feeding situation, weather, water color and tide changes of the previous day; the bait was mainly cold Fresh small miscellaneous fish;

(E) Check the condition of fish species 3 times a day in the morning, middle and evening, and prevent hypoxia in contiguous breeding areas with poor water flow and fertile water quality;

(F) As the large yellow croaker grows, maintain a reasonable density of fish species in the breeding area by sorting, and at the same time adjust fish species of different sizes in the breeding area, and rearrange them so that the specifications of the fish species in the same breeding area are consistent;

(G) Change and wash all kinds of algae that are easy to grow on the mesh 3 from time to time, so as to keep the mesh from being blocked and the water flowing smoothly.

Using the patent of the invention, after 19 months of breeding, the average size of large yellow croaker reaches 500 grams per tail, and the survival rate is about 50%. The body color of the finished fish is closer to natural, with good color, golden yellow, and more delicious meat , fewer diseases in the breeding process; after 50 days of breeding, the harvested commercial crabs are 400 grams per piece, the survival rate is 95%, the fatness of meat crabs and cream crabs is over 90%, and the input-output ratio is 1:5. High benefit.

Claims (2)

1. a kind of large yellow croaker, mud crab three-dimensional cultivation device, comprise floating net and crab cage (4), it is characterized in that, described floating net comprises floating frame (1) and mesh sheet (3), and described floating frame ( 1) is a closed polygonal frame, a float (2) is installed below the float frame (1), and the float (2) is connected to the frame of the float frame (1) in a strip shape, and the float frame (1) A circle of mesh (3) is installed around the periphery, and the mesh (3) surrounds a container with an upper opening, and the upper opening matches the shape of the floating frame (1), and crab cages are placed on the floating float (2). (4), said crab cage (4) has a through hole on the side wall, said crab cage (4) is equipped with a cover (5), said floating frame (1) is rectangular, and said float (2) Arranged along the long side of the floating frame (1); the floating frame (1), the float (2), the crab cage (4) and the cover (5) are made of bamboo or wood; the mesh (3) It is a soft non-nodular net with a mesh size of 20 to 35 millimeters; the crab cage (4) is 40 centimeters long, 30 centimeters wide and 16 centimeters high. 2. according to claim 1 described a kind of large yellow croaker, blue crab three-dimensional cultivating device the large yellow croaker, the blue crab cover breeding method, the steps are as follows: (A) Choose to breed in a sea area with little wind and waves. There is no industrial "three wastes" pollution source in the upstream of the sea area. The water depth of the sea area is more than 6 meters. The bottom of the sea area is silty. -30℃, salinity 20‰-25‰, transparency 1.0m; (B) the mesh (3) is surrounded by a cuboid culture area of 3.2 meters × 3.2 meters × 3.5 meters, and the fish fingerlings are put into the area with a specification of 100-150 grams; (C) Throwing large yellow croaker fry and blue crab fry, select the fish fry and crab fry cultivated in the offshore area. Malformation; (D) Feeding: bait was fed twice a day, once in the morning and in the evening; the feeding amount of the day was matched with the feeding situation, weather, water color and tide changes of the previous day; the bait was mainly cold Fresh small miscellaneous fish; (E) Check the condition of fish species 3 times a day in the morning, middle and evening, and prevent hypoxia in contiguous breeding areas with poor water flow and fertile water quality; (F) As the large yellow croaker grows, maintain a reasonable density of fish species in the breeding area by sorting, and at the same time adjust fish species of different sizes in the breeding area, and rearrange them so that the specifications of the fish species in the same breeding area are consistent; (G) Change and wash all kinds of algae that are easy to grow on the mesh (3) from time to time, so as to keep the mesh from being blocked and the water flow unimpeded.