CN102144582A - Method for cultivating Hemifusus tuba with net cage in hanging way - Google Patents

Abstract

The invention relates to a method for cultivating Hemifusus tuba with a net cage in a hanging way. In the method, a single-layer cage-shaped cultivating cage tool consisting of a cage plate (1) with the diameter of 45-50cm and a polyethylene net (2) with the mesh size of 0.5-1.5cm is used for cultivating young Hemifusus tuba with the average height of 30-40mm and the average weight of 2-3g in a hanging way and 10-15 young Hemifusus tuba are cultivated in each cage. The method comprises the following steps of: filling the young Hemifusus tuba in the cultivating cage tool; hanging in a hanging pond at a water layer with the depth of 0.7-1.4m, wherein the distance between every two adjacent cages is 0.2-1m; feeding the Hemifusus tuba with fresh oyster with shell every 10 days; cleaning the net cage before feeding, cultivating until harvesting time of the Hemifusus tuba. The method disclosed by the invention improves the living environment of the Hemifusus tuba to the maximum extent and reduces the diseases caused by the pollution such as residues, wastes and the like, and reduces the cannibalism phenomenon, thereby effectively improving the survival rate and the growth speed of the Hemifusus tuba; simultaneously, the method can reduce the feeding quantity, the feeding time and the labor intensity.

Description

Pipe Angle Snail Net Cage Hanging Culture Method

technical field

The invention belongs to the technical field of marine aquaculture, and relates to a method for artificially cultivating shellfish, in particular to a method for hoisting and cultivating shellfish in cages.

Background technique

Hemifusus tuba (Gmelin), commonly known as "corner snail, ring snail", is a bottom-dwelling carnivorous shellfish that lives in soft mud and silt in shallow water with a depth of 11-42m in the subtidal zone. It is distributed from the south of Zhejiang Province. It is more common in the coastal areas south of Guangdong and Guangxi. It is a relatively large economic gastropod in shallow seas. The adult shell height is 12-20cm (about 150-300g), and the maximum shell height is 30cm (weight is more than 500g). Yellow-brown or light-brown fine and short hairy shell skin, its meat is delicious, nutritious, and expensive. It is a rare seafood and is loved by people. It is an edible shellfish with high economic value. It sells well in domestic and foreign markets as well as in Hong Kong and Macao. . Up to now, the specification of pipe angle snails is 1-2 pieces/kg, and the market purchase price is 380-400 yuan. The purchase price of commercial shellfish with specifications of 4-6 pieces/kg is 120-140 yuan. The economic value is extremely considerable, and the supply of products exceeds demand. It is a fresh and live seafood product with a high exchange rate for export.

At present, domestic and foreign scholars' research reports on snails mainly include basic theory and applied biology research on morphological structure, ecological habits, reproductive biology, artificial breeding, artificial breeding technology, and life history. Disclosed a kind of pipe angle snail culture technology as publication number is CN101496500A, and this technology is to utilize the area to be 20m ² culture ponds, lay the cement board that is full of through holes at its bottom, and the height of cement board apart from the bottom of the pond is 20cm, makes A space is formed between the bottom of the pool and the cement board; then, the mesh cloth and fine sand are laid on the cement block, and the water inlet pipe goes straight to the bottom of the pool. There is a drainage hole at the bottom of the pool. Plastic water pipes perpendicular to the water surface are used as drainage pipes; the stocking density of snail seedlings is 400-500 grains/m ² at the beginning, and gradually thins out as the individuals grow up, and the stocking density in the later period is 30-40 grains/m ² . Taking a comprehensive view of the above-mentioned reports, the use of net cage hanging culture technology in the cultivation process of snails is not involved.

Contents of the invention

The purpose of the present invention is to provide an effective method for cultivating pipe snails, aiming at the problem that the living environment of pipe angle snails is easily polluted by its own excrement and residual bait, and the phenomenon of cannibalism occurs. Net cage hanging method.

The present invention achieves the above-mentioned purpose like this, and the pipe angle snail net cage hanging culture method comprises the following steps:

① Preparation of breeding cages: the breeding cages are composed of cage plates and polyethylene nets;

② Stocking of snail seedlings: After the culture cages are thoroughly cleaned and disinfected, the tube angle snail seedlings are stocked, and the culture cages containing the snail seedlings are placed in the water layer of the hanging pond at 0.7-1.4m, and the distance between the cages is 0.2-1m;

③Daily management: During the period of growing snails, feed fresh oysters with shells once every 10 days, remove the oyster shells and dirt before each feeding, clean up the attached organisms inside and outside the cage, and then put in enough Fresh oysters in the shell.

The cage plate includes an upper ring, a lower ring, a support rod, and a fixed rod, and the support rod is uniformly dispersed and welded between the upper ring and the lower ring, and the fixed rod is welded on the lower ring.

The breeding cage is a single-layer cage, and the mesh size is 0.5-1.5 cm; the diameter of the cage plate is 45-50 cm.

The average shell height of the snail seedlings is 30-40mm, and the average weight is 2-3g.

The water depth of the hanging pond is 1.5-2m.

The stocking density of the tube angle snail seedlings is 10-50 snail seedlings per cage.

The polyethylene mesh has meshes.

It has been proved by breeding practice that the diameter of the cage plate is about 48cm, and 20 snail seedlings are stocked in each cage, and the breeding effect is the best.

Advantages of the present invention:

(1) Improve the living environment of snails to the greatest extent, reduce the occurrence of diseases caused by pollution such as their own excrement and residual bait, and the phenomenon of cannibalism, thus effectively improving the survival rate and growth of snails speed.

(2) Reduce the amount of feeding, feeding times and labor intensity.

Description of drawings

Fig. 1 is a perspective view of a culture cage for snails of the present invention.

Fig. 2 is a sectional view of a culture cage for snails of the present invention.

Fig. 3 is a schematic diagram of a snail culture cage of the present invention.

Fig. 4 is a top view of the panconia culture cage of the present invention.

Fig. 5 is a schematic diagram of placement of a snail culture cage in the present invention.

Reference signs:

Cage plate 1, polyethylene mesh 2, mesh 3, upper ring 4, lower ring 5, support rod 6, fixed rod 7, cage spacing 8.

As shown in the figure, the cage is composed of a cage plate 1 and a polyethylene net 2. The polyethylene net 2 has meshes 3. The cage plate 1 includes an upper ring 4, a lower ring 5, a support rod 6, and a fixed rod 7. The supporting rods 6 are evenly dispersed and welded between the upper ring 4 and the lower ring 5 , and the fixing rods 7 are welded on the lower ring 5 .

Detailed ways

Embodiment 1: Utilize diameter specification to be 45cm, single-layer cage type, the culture cage of cage mesh size 0.5cm carries out tube angle snail suspension culture. The culture cage is fixedly tied on the floating rope of the cultured shrimp pond, the floating rope is 60m long from east to west, and the water depth of the pond is 1.5m. Breeding cages were placed in a water layer at a depth of 0.7m, and the distance between cages was 0.2m. Ten snail seedlings with an average shell height of 30 mm and an average body weight of 2 g were placed in each cage. During the period of hanging snails, feed fresh oysters with shells once every 10 days. Before each feeding, remove the empty oyster shells and dirt, clean up the attached organisms inside and outside the cage, and then put in a sufficient amount of fresh oysters with shells . Usually, the cages are cleaned once every time they are fed to prevent the attached algae from clogging the mesh, and the cages will not be inverted during the growing period. As long as the cage is permeable and there are some attachments around the cage, a small ecological environment will be formed, which is good for the growth of snails, so there is no need to invert the cage. During the growing period, strengthen the inspection of the cage at ordinary times, and suture the gap in the cage in time to prevent the snails from escaping from the damaged part of the cage or the suture.

Embodiment 2: Utilize diameter specification to be 48cm, single-layer cage type, the culture cage of cage mesh size 1cm carries out tube angle snail suspension culture. The culture cage is fixedly tied on the floating rope of the cultured shrimp pond, the floating rope is 65m long from east to west, and the water depth of the pond is 1.8m. Breeding cages were placed in a water layer with a depth of 1m, and the distance between cages was 0.5m. 20 snail seedlings with an average shell height of 34 mm and an average body weight of 2.5 g were placed in each cage. During the period of hanging snails, feed fresh oysters with shells once every 10 days. Before each feeding, remove the empty oyster shells and dirt, clean up the attached organisms inside and outside the cage, and then put in a sufficient amount of fresh oysters with shells . Usually, the cages are simply cleaned every time they are fed to prevent the attached algae from clogging the mesh, and the cages will not be inverted during the growing period. As long as the cage is permeable and there are some attachments around the cage, a small ecological environment will be formed, which is good for the growth of snails, so there is no need to invert the cage. During the cultivation period, strengthen the inspection of the cage at ordinary times, suture the gap in the cage in time, and prevent the snails from escaping from the damaged part or the suture of the cage.

Embodiment 3: Utilize diameter specification to be 50cm, single-layer cage type, the culture cage of cage mesh size 1.5cm carries out tube angle snail suspension culture. The breeding cage is fixedly tied on the floating rod of the cultured shrimp pond, the floating rod is 70m long from east to west, and the depth of the pond water is 2m. Breeding cages were placed in a water layer at a depth of 1.4m, and the distance between cages was 1m. 50 snail seedlings with an average shell height of 40 mm and an average body weight of 3 g were placed in each cage. During the period of hanging snails, feed fresh oysters with shells once every 10 days. Before each feeding, remove the empty oyster shells and dirt, clean up the attached organisms inside and outside the cage, and then put in a sufficient amount of fresh oysters with shells . Usually, the cages are cleaned once every time they are fed to prevent the attached algae from clogging the mesh, and the cages will not be inverted during the growing period. As long as the cage is permeable and there are some attachments around the cage, a small ecological environment will be formed, which is good for the growth of snails, so there is no need to invert the cage. During the cultivation period, strengthen the inspection of the cage at ordinary times, suture the gap in the cage in time, and prevent the snails from escaping from the damaged part or the suture of the cage.

Claims (7)

1. a pipe angle snail mesh cage hanging culture method is characterized in that comprising the following steps: ① Preparation of the breeding cage: the breeding cage is composed of a cage plate (1) and a polyethylene net (2); ② Stocking of snail seedlings: After thoroughly cleaning and disinfecting the culture cages, put the tube angle snail seedlings into the cages, and then put the culture cages with snail seedlings into the water layer of 0.7-1.4m in the hanging pond, and the distance between cages (8) is 0.2 ~1m; ③Daily management: During the period of growing snails, feed fresh oysters with shells once every 10 days, remove the oyster shells and dirt before each feeding, clean up the attached organisms inside and outside the cage, and then put in enough Fresh oysters in the shell. 2. according to the described pipe angle snail net cage hanging culture method of claim 1, it is characterized in that, described cage dish (1) comprises upper ring (4), lower ring (5), support rod (6), fixed rod (7), the support rods (6) are uniformly dispersed and welded between the upper ring (4) and the lower ring (5), and the fixed rods (7) are welded on the lower ring (5). 3. according to claim 1 described pipe angle snail net cage hanging culture method, it is characterized in that, described culture cage tool is single-layer cage type, and the size of cage mesh is 0.5～1.5cm; The diameter of described cage plate (1) It is 45-50cm. 4 . The method for hanging and cultivating snails in net cages according to claim 1 , wherein the average shell height of the snail seedlings is 30-40 mm, and the average body weight is 2-3 g. 5. according to claim 1 described pipe angle snail mesh cage hanging culture method, it is characterized in that, the water depth of described hanging culture pond is 1.5～2m. 6. The method for raising snails in net cages according to claim 1, wherein the stocking density of the snails is 10-50 snails per cage. 7. according to the described pipe angle snail net cage hanging culture method of claim 1, it is characterized in that, mesh (3) is arranged on described polyethylene net (2).

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